/*  Starshatter: The Open Source Project
    Copyright (c) 2021-2024, Starshatter: The Open Source Project Contributors
    Copyright (c) 2011-2012, Starshatter OpenSource Distribution Contributors
    Copyright (c) 1997-2006, Destroyer Studios LLC.

    AUTHOR:       John DiCamillo


    OVERVIEW
    ========
    CampaignMissionFighter generates missions and mission
    info for the player's FIGHTER SQUADRON as part of a
    dynamic campaign.
*/

#include "CampaignMissionFighter.h"
#include "CampaignMissionRequest.h"
#include "Campaign.h"
#include "Combatant.h"
#include "CombatAssignment.h"
#include "CombatGroup.h"
#include "CombatUnit.h"
#include "CombatZone.h"
#include "Callsign.h"
#include "Galaxy.h"
#include "Mission.h"
#include "MissionTemplate.h"
#include "Instruction.h"
#include "Ship.h"
#include "ShipDesign.h"
#include "StarSystem.h"
#include "Player.h"

#include "ContentBundle.h"
#include "Random.h"
#include "Game.h"

static int pkg_id = 1000;
extern int dump_missions;

// +--------------------------------------------------------------------+

CampaignMissionFighter::CampaignMissionFighter(Campaign* c)
    : campaign(c), squadron(0), mission(0), player_elem(0),
      strike_group(0), strike_target(0), prime_target(0),
      carrier_elem(0), ward(0), escort(0), airborne(false), airbase(false),
      ownside(0), enemy(-1), mission_type(0), mission_info(0)
{
    if (!campaign || !campaign->GetPlayerGroup()) {
        ::Print("ERROR - CMF campaign=0x%08x player_group=0x%08x\n",
        campaign, (DWORD) campaign?campaign->GetPlayerGroup():0);
        return;
    }

    CombatGroup* player_group = campaign->GetPlayerGroup();

    switch (player_group->Type()) {
    case CombatGroup::WING: {
            CombatGroup*          wing = player_group;
            ListIter<CombatGroup> iter = wing->GetComponents();

            while (++iter) {
                if (iter->Type() == CombatGroup::FIGHTER_SQUADRON) {
                    squadron = iter.value();
                }
            }
        }
        break;

    case CombatGroup::FIGHTER_SQUADRON:
    case CombatGroup::INTERCEPT_SQUADRON:
    case CombatGroup::ATTACK_SQUADRON:
        squadron = player_group;
        break;

    default:
        ::Print("ERROR - CMF invalid player group: %s IFF %d\n",
        player_group->GetDescription(),
        player_group->GetIFF());
        break;
    }

    if (squadron) {
        CombatGroup* carrier = squadron->FindCarrier();

        if (carrier && carrier->Type() == CombatGroup::STARBASE) {
            airbase = true;
        }
    }
}

CampaignMissionFighter::~CampaignMissionFighter() {}

// +--------------------------------------------------------------------+

void
CampaignMissionFighter::CreateMission(CampaignMissionRequest* req)
{
    if (!campaign || !squadron || !req)
    return;

    ::Print("\n-----------------------------------------------\n");
    if (req->Script().length())
    ::Print("CMF CreateMission() request: %s '%s'\n",
    Mission::RoleName(req->Type()),
    (const char*) req->Script());

    else
    ::Print("CMF CreateMission() request: %s %s\n",
    Mission::RoleName(req->Type()),
    req->GetObjective() ? req->GetObjective()->Name().data() : "(no target)");

    request       = req;
    mission_info  = 0;

    if (request->GetPrimaryGroup()) {
        switch (request->GetPrimaryGroup()->Type()) {
        case CombatGroup::FIGHTER_SQUADRON:
        case CombatGroup::INTERCEPT_SQUADRON:
        case CombatGroup::ATTACK_SQUADRON:
            squadron = request->GetPrimaryGroup();
            break;
        }
    }

    ownside = squadron->GetIFF();

    for (int i = 0; i < campaign->GetCombatants().size(); i++) {
        int iff = campaign->GetCombatants().at(i)->GetIFF();
        if (iff > 0 && iff != ownside) {
            enemy = iff;
            break;
        }
    }

    static int id_key = 1;
    GenerateMission(id_key++);
    DefineMissionObjectives();

    MissionInfo* info = DescribeMission();

    if (info) {
        campaign->GetMissionList().append(info);

        ::Print("CMF Created %03d '%s' %s\n\n",
        info->id,
        (const char*) info->name,
        Mission::RoleName(mission->Type()));

        if (dump_missions) {
            Text script = mission->Serialize();
            char fname[32];

            sprintf_s(fname, "msn%03d.def", info->id);
            FILE* f;
            fopen_s(&f, fname, "wb");
            if (f) {
                fprintf(f, "%s\n", script.data());
                fclose(f);
            }
        }
    }
    else {
        ::Print("CMF failed to create mission.\n");
    }
}

// +--------------------------------------------------------------------+

Mission*
CampaignMissionFighter::GenerateMission(int id)
{
    bool found = false;

    SelectType();

    if (request && request->Script().length()) {
        MissionTemplate* mt = new MissionTemplate(id, request->Script(), campaign->Path());
        if (mt)
        mt->SetPlayerSquadron(squadron);
        mission = mt;
        found   = true;
    }

    else {
        mission_info = campaign->FindMissionTemplate(mission_type, squadron);
        found        = mission_info != 0;

        if (found) {
            MissionTemplate* mt = new MissionTemplate(id, mission_info->script, campaign->Path());
            if (mt)
            mt->SetPlayerSquadron(squadron);
            mission = mt;
        }
        else {
            mission = new Mission(id);
            if (mission)
            mission->SetType(mission_type);
        }
    }

    if (!mission) {
        Exit();
        return 0;
    }

    char name[64];
    sprintf_s(name, "Fighter Mission %d", id);

    mission->SetName(name);
    mission->SetTeam(squadron->GetIFF());
    mission->SetStart(request->StartTime());

    SelectRegion();
    GenerateStandardElements();
    CreatePatrols();

    if (!found) {
        GenerateMissionElements();
        mission->SetOK(true);
        mission->Validate();
    }

    else {
        mission->Load();

        if (mission->IsOK()) {
            player_elem  = mission->GetPlayer();
            prime_target = mission->GetTarget();
            ward         = mission->GetWard();

            Player* p = Player::GetCurrentPlayer();

            if (player_elem && p)
            player_elem->SetAlert(!p->FlyingStart());
        }

        // if there was a problem, scrap the mission
        // and start over:
        else {
            delete mission;

            mission = new Mission(id);
            mission->SetType(mission_type);
            mission->SetName(name);
            mission->SetTeam(squadron->GetIFF());
            mission->SetStart(request->StartTime());

            SelectRegion();
            GenerateStandardElements();
            GenerateMissionElements();

            mission->SetOK(true);
            mission->Validate();
        }
    }

    return mission;
}

// +--------------------------------------------------------------------+

bool
CampaignMissionFighter::IsGroundObjective(CombatGroup* obj)
{
    bool ground = false;

    if (obj) {
        CombatGroup* pgroup = campaign->GetPlayerGroup();

        if (pgroup) {
            CombatZone* zone = pgroup->GetAssignedZone();

            if (zone) {
                StarSystem* system = campaign->GetSystem(zone->System());

                if (system) {
                    OrbitalRegion* region = system->FindRegion(obj->GetRegion());

                    if (region && region->Type() == Orbital::TERRAIN) {
                        ground = true;
                    }
                }
            }
        }
    }

    return ground;
}

// +--------------------------------------------------------------------+

void
CampaignMissionFighter::SelectType()
{
    int type = Mission::PATROL;

    if (request) {
        type = request->Type();
        if (type == Mission::STRIKE) {
            strike_group = request->GetPrimaryGroup();

            // verify that objective is a ground target:
            if (!IsGroundObjective(request->GetObjective())) {
                type = Mission::ASSAULT;
            }
        }

        else if (type == Mission::ESCORT_STRIKE) {
            strike_group = request->GetSecondaryGroup();
            if (!strike_group || strike_group->CalcValue() < 1) {
                type = Mission::SWEEP;
                strike_group = 0;
            }
        }
    }

    mission_type = type;
}

void
CampaignMissionFighter::SelectRegion()
{
    CombatZone* zone = squadron->GetAssignedZone();

    if (!zone)
    zone = squadron->GetCurrentZone();

    if (zone) {
        mission->SetStarSystem(campaign->GetSystem(zone->System()));
        mission->SetRegion(*zone->GetRegions().at(0));

        orb_region = mission->GetRegion();

        if (zone->GetRegions().size() > 1) {
            air_region = *zone->GetRegions().at(1);

            StarSystem*    system   = mission->GetStarSystem();
            OrbitalRegion* rgn      = 0;

            if (system)
            rgn = system->FindRegion(air_region);

            if (!rgn || rgn->Type() != Orbital::TERRAIN)
            air_region = "";
        }

        if (air_region.length() > 0) {
            if (request && IsGroundObjective(request->GetObjective())) {
                airborne = true;
            }

            else if (mission->Type() >= Mission::AIR_PATROL &&
                    mission->Type() <= Mission::AIR_INTERCEPT) {
                airborne = true;
            }

            else if (mission->Type() == Mission::STRIKE ||
                    mission->Type() == Mission::ESCORT_STRIKE) {
                if (strike_group) {
                    strike_target = campaign->FindStrikeTarget(ownside, strike_group);

                    if (strike_target && strike_target->GetRegion() == air_region)
                    airborne = true;
                }
            }

            if (airbase) {
                mission->SetRegion(air_region);
            }
        }
    }

    else {
        ::Print("WARNING: CMF - No zone for '%s'\n", squadron->Name().data());

        StarSystem* s = campaign->GetSystemList()[0];

        mission->SetStarSystem(s);
        mission->SetRegion(s->Regions()[0]->Name());
    }

    if (!airborne) {
        switch (mission->Type()) {
        case Mission::AIR_PATROL:     mission->SetType(Mission::PATROL);     break;
        case Mission::AIR_SWEEP:      mission->SetType(Mission::SWEEP);      break;
        case Mission::AIR_INTERCEPT:  mission->SetType(Mission::INTERCEPT);  break;
        default:                                                             break;
        }
    }
}

// +--------------------------------------------------------------------+

void
CampaignMissionFighter::GenerateStandardElements()
{
    ListIter<CombatZone> z_iter = campaign->GetZones();
    while (++z_iter) {
        CombatZone* z = z_iter.value();

        ListIter<ZoneForce>  iter = z->GetForces();
        while (++iter) {
            ZoneForce* force = iter.value();
            ListIter<CombatGroup> group = force->GetGroups();

            while (++group) {
                CombatGroup* g = group.value();

                switch (g->Type()) {
                case CombatGroup::INTERCEPT_SQUADRON:
                case CombatGroup::FIGHTER_SQUADRON:
                case CombatGroup::ATTACK_SQUADRON:
                case CombatGroup::LCA_SQUADRON:
                    CreateSquadron(g);
                    break;

                case CombatGroup::DESTROYER_SQUADRON:
                case CombatGroup::BATTLE_GROUP:
                case CombatGroup::CARRIER_GROUP:
                    CreateElements(g);
                    break;

                case CombatGroup::MINEFIELD:
                case CombatGroup::BATTERY:
                case CombatGroup::MISSILE:
                case CombatGroup::STATION:
                case CombatGroup::STARBASE:
                case CombatGroup::SUPPORT:
                case CombatGroup::COURIER:
                case CombatGroup::MEDICAL:
                case CombatGroup::SUPPLY:
                case CombatGroup::REPAIR:
                    CreateElements(g);
                    break;

                case CombatGroup::CIVILIAN:
                case CombatGroup::WAR_PRODUCTION:
                case CombatGroup::FACTORY:
                case CombatGroup::REFINERY:
                case CombatGroup::RESOURCE:
                case CombatGroup::INFRASTRUCTURE:
                case CombatGroup::TRANSPORT:
                case CombatGroup::NETWORK:
                case CombatGroup::HABITAT:
                case CombatGroup::STORAGE:
                case CombatGroup::NON_COM:
                    CreateElements(g);
                    break;
                }
            }
        }
    }
}

// +--------------------------------------------------------------------+

void
CampaignMissionFighter::GenerateMissionElements()
{
    CreateWards();
    CreatePlayer(squadron);
    CreateTargets();
    CreateEscorts();

    if (player_elem) {
        Instruction* obj = new Instruction(mission->GetRegion(),
        Point(0,0,0),
        Instruction::RTB);

        if (obj)
        player_elem->AddObjective(obj);
    }
}

// +--------------------------------------------------------------------+

void
CampaignMissionFighter::CreateElements(CombatGroup* g)
{
    MissionElement*   elem  = 0;
    List<CombatUnit>& units = g->GetUnits();

    CombatUnit* cmdr = 0;

    for (int i = 0; i < units.size(); i++) {
        elem = CreateSingleElement(g, units[i]);

        if (elem) {
            if (!cmdr) {
                cmdr = units[i];
            }
            else {
                elem->SetCommander(cmdr->Name());

                if (g->Type() == CombatGroup::CARRIER_GROUP &&
                        elem->MissionRole() == Mission::ESCORT) {
                    Instruction* obj = new Instruction(Instruction::ESCORT, cmdr->Name());
                    if (obj)
                    elem->AddObjective(obj);
                }
            }

            mission->AddElement(elem);
        }
    }
}

MissionElement*
CampaignMissionFighter::CreateSingleElement(CombatGroup* g, CombatUnit* u)
{
    if (!g || g->IsReserve())     return 0;
    if (!u || u->LiveCount() < 1) return 0;

    // make sure this unit is actually in the right star system:
    Galaxy* galaxy = Galaxy::GetInstance();
    if (galaxy) {
        if (galaxy->FindSystemByRegion(u->GetRegion()) !=
                galaxy->FindSystemByRegion(squadron->GetRegion())) {
            return 0;
        }
    }

    // make sure this unit isn't already in the mission:
    ListIter<MissionElement> e_iter = mission->GetElements();
    while (++e_iter) {
        MissionElement* elem = e_iter.value();

        if (elem->GetCombatUnit() == u)
        return 0;
    }

    MissionElement* elem = new MissionElement;
    if (!elem) {
        Exit();
        return 0;
    }

    if (u->Name().length())
    elem->SetName(u->Name());
    else
    elem->SetName(u->DesignName());

    elem->SetElementID(pkg_id++);

    elem->SetDesign(u->GetDesign());
    elem->SetCount(u->LiveCount());
    elem->SetIFF(u->GetIFF());
    elem->SetIntelLevel(g->IntelLevel());
    elem->SetRegion(u->GetRegion());
    elem->SetHeading(u->GetHeading());

    int   unit_index = g->GetUnits().index(u);
    Point base_loc   = u->Location();
    bool  exact      = u->IsStatic(); // exact unit-level placement

    if (base_loc.length() < 1) {
        base_loc = g->Location();
        exact = false;
    }

    if (unit_index < 0 || unit_index > 0 && !exact) {
        Point loc = RandomDirection();

        if (!u->IsStatic()) {
            while (fabs(loc.y) > fabs(loc.x))
            loc = RandomDirection();

            loc *= 10e3 + 9e3 * unit_index;
        }
        else {
            loc *= 2e3 + 2e3 * unit_index;
        }

        elem->SetLocation(base_loc + loc);
    }
    else {
        elem->SetLocation(base_loc);
    }

    if (g->Type() == CombatGroup::CARRIER_GROUP) {
        if (u->Type() == Ship::CARRIER) {
            elem->SetMissionRole(Mission::FLIGHT_OPS);

            if (squadron && elem->GetCombatGroup() == squadron->FindCarrier())
            carrier_elem = elem;

            else if (!carrier_elem && u->GetIFF() == squadron->GetIFF())
            carrier_elem = elem;
        }
        else {
            elem->SetMissionRole(Mission::ESCORT);
        }
    }
    else if (u->Type() == Ship::STATION ||
            u->Type() == Ship::STARBASE) {
        elem->SetMissionRole(Mission::FLIGHT_OPS);

        if (squadron && elem->GetCombatGroup() == squadron->FindCarrier()) {
            carrier_elem = elem;

            if (u->Type() == Ship::STARBASE)
            airbase = true;
        }
    }
    else if (u->Type() == Ship::FARCASTER) {
        elem->SetMissionRole(Mission::OTHER);

        // link farcaster to other terminus:
        Text name = u->Name();
        int  dash = -1;

        for (int i = 0; i < (int) name.length(); i++)
        if (name[i] == '-')
        dash = i;

        Text src = name.substring(0, dash);
        Text dst = name.substring(dash+1, name.length() - (dash+1));

        Instruction* obj = new Instruction(Instruction::VECTOR, dst + "-" + src);
        elem->AddObjective(obj);
    }
    else if ((u->Type() & Ship::STARSHIPS) != 0) {
        elem->SetMissionRole(Mission::FLEET);
    }

    elem->SetCombatGroup(g);
    elem->SetCombatUnit(u);

    return elem;
}

CombatUnit*
CampaignMissionFighter::FindCarrier(CombatGroup* g)
{
    CombatGroup* carrier = g->FindCarrier();

    if (carrier && carrier->GetUnits().size()) {
        MissionElement* carrier_elem = mission->FindElement(carrier->Name());

        if (carrier_elem)
        return carrier->GetUnits().at(0);
    }

    return 0;
}

void
CampaignMissionFighter::CreateSquadron(CombatGroup* g)
{
    if (!g || g->IsReserve()) return;

    CombatUnit* fighter = g->GetUnits().at(0);
    CombatUnit* carrier = FindCarrier(g);

    if (!fighter || !carrier) return;

    int live_count  = fighter->LiveCount();
    int maint_count = (live_count > 4) ? live_count / 2 : 0;

    MissionElement* elem = new MissionElement;

    if (!elem) {
        Exit();
        return;
    }

    elem->SetName(g->Name());
    elem->SetElementID(pkg_id++);

    elem->SetDesign(fighter->GetDesign());
    elem->SetCount(fighter->Count());
    elem->SetDeadCount(fighter->DeadCount());
    elem->SetMaintCount(maint_count);
    elem->SetIFF(fighter->GetIFF());
    elem->SetIntelLevel(g->IntelLevel());
    elem->SetRegion(fighter->GetRegion());

    elem->SetCarrier(carrier->Name());
    elem->SetCommander(carrier->Name());
    elem->SetLocation(carrier->Location() + RandomPoint());

    elem->SetCombatGroup(g);
    elem->SetCombatUnit(fighter);

    mission->AddElement(elem);
}

void
CampaignMissionFighter::CreatePlayer(CombatGroup* g)
{
    int pkg_size = 2;

    if (mission->Type() == Mission::STRIKE || mission->Type() == Mission::ASSAULT) {
        if (request && request->GetObjective()) {
            int tgt_type = request->GetObjective()->Type();

            if (tgt_type >= CombatGroup::FLEET && tgt_type <= CombatGroup::CARRIER_GROUP)
            pkg_size = 4;

            if (tgt_type == CombatGroup::STATION || tgt_type == CombatGroup::STARBASE)
            pkg_size = 4;
        }
    }

    MissionElement* elem = CreateFighterPackage(g, pkg_size, mission->Type());

    if (elem) {
        Player* p = Player::GetCurrentPlayer();
        elem->SetAlert(p ? !p->FlyingStart() : true);
        elem->SetPlayer(1);

        if (ward) {
            Point approach = elem->Location() - ward->Location();
            approach.Normalize();

            Point pickup = ward->Location() + approach * 50e3;
            double delta = (pickup - elem->Location()).length();

            if (delta > 30e3) {
                Instruction* n = new Instruction(elem->Region(), pickup, Instruction::ESCORT);
                n->SetTarget(ward->Name());
                n->SetSpeed(750);
                elem->AddNavPoint(n);
            }

            Instruction* obj = new Instruction(Instruction::ESCORT, ward->Name());

            switch (mission->Type()) {
            case Mission::ESCORT_FREIGHT:
                obj->SetTargetDesc(Text("the star freighter ") + ward->Name());
                break;

            case Mission::ESCORT_SHUTTLE:
                obj->SetTargetDesc(Text("the shuttle ") + ward->Name());
                break;

            case Mission::ESCORT_STRIKE:
                obj->SetTargetDesc(Text("the ") + ward->Name() + Text(" strike package"));
                break;

            case Mission::DEFEND:
                obj->SetTargetDesc(Text("the ") + ward->Name());
                break;

            default:
                if (ward->GetCombatGroup()) {
                    obj->SetTargetDesc(Text("the ") + ward->GetCombatGroup()->GetDescription());
                }
                else {
                    obj->SetTargetDesc(Text("the ") + ward->Name());
                }
                break;
            }

            elem->AddObjective(obj);
        }

        mission->AddElement(elem);

        player_elem = elem;
    }
}

// +--------------------------------------------------------------------+

void
CampaignMissionFighter::CreatePatrols()
{
    List<MissionElement> patrols;

    ListIter<MissionElement>   iter = mission->GetElements();
    while (++iter) {
        MissionElement*   squad_elem  = iter.value();
        CombatGroup*      squadron    = squad_elem->GetCombatGroup();
        CombatUnit*       unit        = squad_elem->GetCombatUnit();

        if (!squad_elem->IsSquadron() || !squadron || !unit || unit->LiveCount() < 4)
        continue;

        if (squadron->Type() == CombatGroup::INTERCEPT_SQUADRON ||
                squadron->Type() == CombatGroup::FIGHTER_SQUADRON) {

            StarSystem*    system      = mission->GetStarSystem();
            CombatGroup*   base        = squadron->FindCarrier();

            if (!base)
                continue;

            OrbitalRegion* region      = system->FindRegion(base->GetRegion());

            if (!region)
                continue;

            int            patrol_type = Mission::PATROL;
            Point          base_loc;

            if (region->Type() == Orbital::TERRAIN) {
                patrol_type = Mission::AIR_PATROL;

                if (RandomChance(2,3))
                continue;
            }

            base_loc = base->Location() + RandomPoint() * 1.5;

            if (region->Type() == Orbital::TERRAIN)
            base_loc += Point(0, 0, 14.0e3);

            MissionElement* elem = CreateFighterPackage(squadron, 2, patrol_type);
            if (elem) {
                elem->SetIntelLevel(Intel::KNOWN);
                elem->SetRegion(base->GetRegion());
                elem->SetLocation(base_loc);
                patrols.append(elem);
            }
        }
    }

    iter.attach(patrols);
    while (++iter)
    mission->AddElement(iter.value());
}

// +--------------------------------------------------------------------+

void
CampaignMissionFighter::CreateWards()
{
    switch (mission->Type()) {
    case Mission::ESCORT_FREIGHT:    CreateWardFreight(); break;
    case Mission::ESCORT_SHUTTLE:    CreateWardShuttle(); break;
    case Mission::ESCORT_STRIKE:     CreateWardStrike();  break;
    default:                                              break;
    }
}

void
CampaignMissionFighter::CreateWardFreight()
{
    if (!mission || !mission->GetStarSystem()) return;

    CombatUnit*    carrier  = FindCarrier(squadron);
    CombatGroup*   freight  = 0;

    if (request)
    freight = request->GetObjective();

    if (!freight)
    freight = campaign->FindGroup(ownside, CombatGroup::FREIGHT);

    if (!freight || freight->CalcValue() < 1)  return;

    CombatUnit* unit = freight->GetNextUnit();
    if (!unit) return;

    MissionElement* elem = CreateSingleElement(freight, unit);
    if (!elem) return;

    elem->SetMissionRole(Mission::CARGO);
    elem->SetIntelLevel(Intel::KNOWN);
    elem->SetRegion(squadron->GetRegion());

    if (carrier)
    elem->SetLocation(carrier->Location() + RandomPoint() * 2);

    ward = elem;
    mission->AddElement(elem);


    StarSystem*    system   = mission->GetStarSystem();
    OrbitalRegion* rgn1     = system->FindRegion(elem->Region());
    Point          delta    = rgn1->Location() - rgn1->Primary()->Location();
    Point          npt_loc  = elem->Location();
    Instruction*   n        = 0;

    delta.Normalize();
    delta *= 200.0e3;

    npt_loc += delta;

    n = new Instruction(elem->Region(),
    npt_loc,
    Instruction::VECTOR);

    if (n) {
        n->SetSpeed(500);
        elem->AddNavPoint(n);
    }

    Text rgn2 = elem->Region();
    List<CombatZone>& zones = campaign->GetZones();
    if (zones[zones.size()-1]->HasRegion(rgn2))
    rgn2 = *zones[0]->GetRegions()[0];
    else
    rgn2 = *zones[zones.size()-1]->GetRegions()[0];

    n = new Instruction(rgn2,
    Point(0, 0, 0),
    Instruction::VECTOR);

    if (n) {
        n->SetSpeed(750);
        elem->AddNavPoint(n);
    }
}

void
CampaignMissionFighter::CreateWardShuttle()
{
    if (!mission || !mission->GetStarSystem()) return;

    CombatUnit*    carrier  = FindCarrier(squadron);
    CombatGroup*   shuttle  = campaign->FindGroup(ownside, CombatGroup::LCA_SQUADRON);

    if (!shuttle || shuttle->CalcValue() < 1)  return;

    List<CombatUnit>& units = shuttle->GetUnits();

    MissionElement* elem = CreateFighterPackage(shuttle, 1, Mission::CARGO);
    if (!elem) return;

    elem->SetIntelLevel(Intel::KNOWN);
    elem->SetRegion(orb_region);
    elem->Loadouts().destroy();

    if (carrier)
    elem->SetLocation(carrier->Location() + RandomPoint() * 2);

    ward = elem;
    mission->AddElement(elem);

    // if there is terrain nearby, then have the shuttle fly down to it:
    if (air_region.length() > 0) {
        StarSystem*    system   = mission->GetStarSystem();
        OrbitalRegion* rgn1     = system->FindRegion(elem->Region());
        Point          delta    = rgn1->Location() - rgn1->Primary()->Location();
        Point          npt_loc  = elem->Location();
        Instruction*   n        = 0;

        delta.Normalize();
        delta *= -200.0e3;

        npt_loc += delta;

        n = new Instruction(elem->Region(),
        npt_loc,
        Instruction::VECTOR);

        if (n) {
            n->SetSpeed(500);
            elem->AddNavPoint(n);
        }

        n = new Instruction(air_region,
        Point(0, 0, 10.0e3),
        Instruction::VECTOR);

        if (n) {
            n->SetSpeed(500);
            elem->AddNavPoint(n);
        }
    }

    // otherwise, escort the shuttle in for a landing on the carrier:
    else if (carrier) {
        Point          src = carrier->Location() + RandomDirection() * 150e3;
        Point          dst = carrier->Location() + RandomDirection() * 25e3;
        Instruction*   n   = 0;

        elem->SetLocation(src);

        n = new Instruction(elem->Region(), dst, Instruction::DOCK);
        if (n) {
            n->SetTarget(carrier->Name());
            n->SetSpeed(500);
            elem->AddNavPoint(n);
        }
    }
}

void
CampaignMissionFighter::CreateWardStrike()
{
    if (!mission || !mission->GetStarSystem()) return;

    CombatUnit*    carrier  = FindCarrier(squadron);
    CombatGroup*   strike   = strike_group;

    if (!strike || strike->CalcValue() < 1)  return;

    List<CombatUnit>& units = strike->GetUnits();

    int type = Mission::ASSAULT;

    if (airborne)
    type = Mission::STRIKE;

    MissionElement* elem = CreateFighterPackage(strike, 2, type);
    if (!elem) return;

    if (strike->GetParent() == squadron->GetParent()) {
        Player* p = Player::GetCurrentPlayer();
        elem->SetAlert(p ? !p->FlyingStart() : true);
    }

    elem->SetIntelLevel(Intel::KNOWN);
    elem->SetRegion(squadron->GetRegion());

    if (strike_target) {
        Instruction* obj = new Instruction(Instruction::ASSAULT, strike_target->Name());

        if (obj) {
            if (airborne)
            obj->SetAction(Instruction::STRIKE);

            elem->AddObjective(obj);
        }
    }

    ward = elem;
    mission->AddElement(elem);


    StarSystem*    system   = mission->GetStarSystem();
    OrbitalRegion* rgn1     = system->FindRegion(elem->Region());
    Point          delta    = rgn1->Location() - rgn1->Primary()->Location();
    Point          npt_loc  = elem->Location();
    Instruction*   n        = 0;

    if (airborne) {
        delta.Normalize();
        delta *= -30.0e3;
        npt_loc += delta;

        n = new Instruction(elem->Region(),
        npt_loc,
        Instruction::VECTOR);
        if (n) {
            n->SetSpeed(500);
            elem->AddNavPoint(n);
        }

        npt_loc = Point(0, 0, 10.0e3);

        n = new Instruction(air_region,
        npt_loc,
        Instruction::VECTOR);
        if (n) {
            n->SetSpeed(500);
            elem->AddNavPoint(n);
        }
    }

    // IP:
    if (strike_target) {
        delta = strike_target->Location() - npt_loc;
        delta.Normalize();
        delta *= 15.0e3;

        npt_loc = strike_target->Location() + delta + Point(0, 0, 8.0e3);

        n = new Instruction(strike_target->GetRegion(),
        npt_loc,
        Instruction::STRIKE);
        if (n) {
            n->SetSpeed(500);
            elem->AddNavPoint(n);
        }
    }

    if (airborne) {
        n = new Instruction(air_region,
        Point(0, 0, 30.0e3),
        Instruction::VECTOR);
        if (n) {
            n->SetSpeed(500);
            elem->AddNavPoint(n);
        }
    }

    if (carrier) {
        n = new Instruction(elem->Region(),
        carrier->Location() - Point(0, -20.0e3, 0),
        Instruction::VECTOR);
        if (n) {
            n->SetSpeed(500);
            elem->AddNavPoint(n);
        }
    }

    // find the strike target element:
    if (strike_target) {
        prime_target = mission->FindElement(strike_target->Name());
    }
}

// +--------------------------------------------------------------------+

void
CampaignMissionFighter::CreateEscorts()
{
    bool escort_needed = false;

    if (mission->Type() == Mission::STRIKE || mission->Type() == Mission::ASSAULT) {
        if (request && request->GetObjective()) {
            int tgt_type = request->GetObjective()->Type();

            if (tgt_type == CombatGroup::CARRIER_GROUP ||
                    tgt_type == CombatGroup::STATION       ||
                    tgt_type == CombatGroup::STARBASE)

            escort_needed = true;
        }
    }

    if (player_elem && escort_needed) {
        CombatGroup* s = FindSquadron(ownside, CombatGroup::INTERCEPT_SQUADRON);

        if (s && s->IsAssignable()) {
            MissionElement* elem = CreateFighterPackage(s, 2, Mission::ESCORT_STRIKE);

            if (elem) {
                Point offset = Point(2.0e3, 2.0e3, 1.0e3);

                ListIter<Instruction> npt_iter = player_elem->NavList();
                while (++npt_iter) {
                    Instruction* npt = npt_iter.value();
                    Instruction* n   = new Instruction(npt->RegionName(),
                    npt->Location() + offset,
                    Instruction::ESCORT);
                    if (n) {
                        n->SetSpeed(npt->Speed());
                        elem->AddNavPoint(n);
                    }
                }

                mission->AddElement(elem);
            }
        }
    }
}

// +--------------------------------------------------------------------+

void
CampaignMissionFighter::CreateTargets()
{
    switch (mission->Type()) {
    default:
    case Mission::DEFEND:
    case Mission::PATROL:         CreateTargetsPatrol();        break;
    case Mission::SWEEP:          CreateTargetsSweep();         break;
    case Mission::INTERCEPT:      CreateTargetsIntercept();     break;
    case Mission::ESCORT_FREIGHT: CreateTargetsFreightEscort(); break;

    case Mission::ESCORT:
    case Mission::ESCORT_SHUTTLE: CreateTargetsShuttleEscort(); break;
    case Mission::ESCORT_STRIKE:  CreateTargetsStrikeEscort();  break;
    case Mission::STRIKE:         CreateTargetsStrike();        break;
    case Mission::ASSAULT:        CreateTargetsAssault();       break;
    }
}

void
CampaignMissionFighter::CreateTargetsPatrol()
{
    if (!squadron || !player_elem) return;

    Text   region     = squadron->GetRegion();
    Point  base_loc   = player_elem->Location();
    Point  patrol_loc;

    if (airborne)
    base_loc = RandomPoint() * 2 + Point(0, 0, 12.0e3);

    else if (carrier_elem)
    base_loc = carrier_elem->Location();

    if (airborne) {
        if (!airbase)
        PlanetaryInsertion(player_elem);
        region     = air_region;
        patrol_loc = base_loc +
        RandomDirection() * Random( 60e3, 100e3);
    }
    else {
        patrol_loc = base_loc +
        RandomDirection() * Random(110e3, 160e3);
    }

    Instruction* n = new Instruction(region,
    patrol_loc,
    Instruction::PATROL);
    if (n)
    player_elem->AddNavPoint(n);

    int ntargets = (int) Random(2.0,5.1);

    while (ntargets > 0) {
        int t = CreateRandomTarget(region, patrol_loc);
        ntargets -= t;
        if (t < 1) break;
    }

    if (airborne && !airbase) {
        OrbitalInsertion(player_elem);
    }

    Instruction* obj = new Instruction(*n);
    obj->SetTargetDesc("inbound enemy units");
    player_elem->AddObjective(obj);

    if (carrier_elem && !airborne) {
        obj = new Instruction(Instruction::DEFEND, carrier_elem->Name());
        if (obj) {
            obj->SetTargetDesc(Text("the ") + carrier_elem->Name() + " battle group");
            player_elem->AddObjective(obj);
        }
    }
}

void
CampaignMissionFighter::CreateTargetsSweep()
{
    if (!squadron || !player_elem) return;

    double traverse      = PI;
    double a             = Random(-PI/2, PI/2);
    Point  base_loc      = player_elem->Location();
    Point  sweep_loc     = base_loc;
    Text   region        = player_elem->Region();
    Instruction* n          = 0;

    if (carrier_elem)
    base_loc = carrier_elem->Location();

    if (airborne) {
        PlanetaryInsertion(player_elem);
        region = air_region;
        sweep_loc = RandomPoint() + Point(0, 0, 10.0e3);   // keep it airborne!
    }

    sweep_loc += Point(sin(a), -cos(a), 0) * 100.0e3;

    n = new Instruction(region,
    sweep_loc,
    Instruction::VECTOR);
    if (n) {
        n->SetSpeed(750);
        player_elem->AddNavPoint(n);
    }

    int index    = 0;
    int ntargets = 6;

    while (traverse > 0) {
        double a1 = Random(PI/4, PI/2);
        traverse  -= a1;
        a         += a1;

        sweep_loc += Point(sin(a), -cos(a), 0) * 80.0e3;

        n = new Instruction(region,
        sweep_loc,
        Instruction::SWEEP);
        if (n) {
            n->SetSpeed(750);
            n->SetFormation(Instruction::SPREAD);
            player_elem->AddNavPoint(n);
        }

        if (ntargets && RandomChance()) {
            ntargets -= CreateRandomTarget(region, sweep_loc);
        }

        index++;
    }

    if (ntargets > 0)
    CreateRandomTarget(region, sweep_loc);

    if (airborne && !airbase) {
        OrbitalInsertion(player_elem);
        region = player_elem->Region();
    }

    sweep_loc = base_loc;
    sweep_loc.y += 30.0e3;

    n = new Instruction(region,
    sweep_loc,
    Instruction::VECTOR);
    if (n) {
        n->SetSpeed(750);
        player_elem->AddNavPoint(n);
    }

    Instruction* obj = new Instruction(region,
    sweep_loc,
    Instruction::SWEEP);
    if (obj) {
        obj->SetTargetDesc("enemy patrols");
        player_elem->AddObjective(obj);
    }

    if (carrier_elem && !airborne) {
        obj = new Instruction(Instruction::DEFEND, carrier_elem->Name());
        if (obj) {
            obj->SetTargetDesc(Text("the ") + carrier_elem->Name() + " battle group");
            player_elem->AddObjective(obj);
        }
    }
}

void
CampaignMissionFighter::CreateTargetsIntercept()
{
    if (!squadron || !player_elem) return;

    CombatUnit*    carrier  = FindCarrier(squadron);
    CombatGroup*   s        = FindSquadron(enemy, CombatGroup::ATTACK_SQUADRON);
    CombatGroup*   s2       = FindSquadron(enemy, CombatGroup::FIGHTER_SQUADRON);

    if (!s || !s2) return;

    int   ninbound = 2 + (int) (RandomIndex() < 5);
    bool  second   = ninbound > 2;
    Text  attacker;

    while (ninbound--) {
        MissionElement* elem = CreateFighterPackage(s, 4, Mission::ASSAULT);
        if (elem) {
            elem->SetIntelLevel(Intel::KNOWN);
            elem->Loadouts().destroy();
            elem->Loadouts().append(new MissionLoad(-1, "Hvy Ship Strike"));

            if (carrier) {
                Instruction* obj = new Instruction(Instruction::ASSAULT, carrier->Name());
                if (obj) {
                    elem->AddObjective(obj);
                    elem->SetLocation(carrier->Location() + RandomPoint() * 6);
                }
            }
            else {
                elem->SetLocation(squadron->Location() + RandomPoint() * 5);
            }

            mission->AddElement(elem);

            attacker = elem->Name();

            if (!prime_target) {
                prime_target = elem;
                Instruction* obj = new Instruction(Instruction::INTERCEPT, attacker);
                if (obj) {
                    obj->SetTargetDesc(Text("inbound strike package '") + elem->Name() + "'");
                    player_elem->AddObjective(obj);
                }
            }

            MissionElement* e2 = CreateFighterPackage(s2, 2, Mission::ESCORT);
            if (e2) {
                e2->SetIntelLevel(Intel::KNOWN);
                e2->SetLocation(elem->Location() + RandomPoint() * 0.25);

                Instruction* obj = new Instruction(Instruction::ESCORT, elem->Name());
                if (obj)
                e2->AddObjective(obj);
                mission->AddElement(e2);
            }
        }
    }

    if (second) {
        // second friendly fighter package
        CombatGroup* s = FindSquadron(ownside, CombatGroup::FIGHTER_SQUADRON);

        if (s) {
            MissionElement* elem = CreateFighterPackage(s, 2, Mission::INTERCEPT);
            if (elem) {
                Player* p = Player::GetCurrentPlayer();
                elem->SetAlert(p ? !p->FlyingStart() : true);

                Instruction* obj = new Instruction(Instruction::INTERCEPT, attacker);
                if (obj)
                elem->AddObjective(obj);
                mission->AddElement(elem);
            }
        }
    }

    if (carrier && !airborne) {
        Instruction* obj = new Instruction(Instruction::DEFEND, carrier->Name());
        if (obj) {
            obj->SetTargetDesc(Text("the ") + carrier->Name() + " battle group");
            player_elem->AddObjective(obj);
        }
    }
}

void
CampaignMissionFighter::CreateTargetsFreightEscort()
{
    if (!squadron || !player_elem) return;

    if (!ward) {
        CreateTargetsPatrol();
        return;
    }

    CombatUnit*    carrier  = FindCarrier(squadron);
    CombatGroup*   s        = FindSquadron(enemy, CombatGroup::ATTACK_SQUADRON);
    CombatGroup*   s2       = FindSquadron(enemy, CombatGroup::FIGHTER_SQUADRON);

    if (!s) s = s2;

    if (!s || !s2) return;

    MissionElement* elem = CreateFighterPackage(s, 2, Mission::ASSAULT);
    if (elem) {
        elem->SetIntelLevel(Intel::KNOWN);

        elem->SetLocation(ward->Location() + RandomPoint() * 5);

        Instruction* obj = new Instruction(Instruction::ASSAULT, ward->Name());
        if (obj)
        elem->AddObjective(obj);
        mission->AddElement(elem);

        MissionElement* e2 = CreateFighterPackage(s2, 2, Mission::ESCORT);
        if (e2) {
            e2->SetIntelLevel(Intel::KNOWN);
            e2->SetLocation(elem->Location() + RandomPoint() * 0.25);

            Instruction* obj2 = new Instruction(Instruction::ESCORT, elem->Name());
            if (obj2)
            e2->AddObjective(obj2);
            mission->AddElement(e2);
        }
    }

    Instruction* obj3 = new Instruction(mission->GetRegion(),
    Point(0,0,0),
    Instruction::PATROL);

    if (obj3) {
        obj3->SetTargetDesc("enemy patrols");
        player_elem->AddObjective(obj3);
    }
}

void
CampaignMissionFighter::CreateTargetsShuttleEscort()
{
    CreateTargetsFreightEscort();
}

// +--------------------------------------------------------------------+

void
CampaignMissionFighter::CreateTargetsStrikeEscort()
{
    if (!squadron || !player_elem) return;

    if (ward) {
        Point offset = Point(2.0e3, 2.0e3, 1.0e3);

        ListIter<Instruction> npt_iter = ward->NavList();
        while (++npt_iter) {
            Instruction* npt = npt_iter.value();
            Instruction* n   = new Instruction(npt->RegionName(),
            npt->Location() + offset,
            Instruction::ESCORT);
            if (n) {
                n->SetSpeed(npt->Speed());
                player_elem->AddNavPoint(n);
            }
        }
    }
}

// +--------------------------------------------------------------------+

void
CampaignMissionFighter::CreateTargetsStrike()
{
    if (!squadron || !player_elem) return;

    if (request && request->GetObjective())
    strike_target = request->GetObjective();

    if (strike_target && strike_group) {
        CreateElements(strike_target);

        ListIter<MissionElement> e_iter = mission->GetElements();
        while (++e_iter) {
            MissionElement* elem = e_iter.value();

            if (elem->GetCombatGroup() == strike_target) {
                prime_target = elem;
                Instruction* obj = new Instruction(Instruction::STRIKE, elem->Name());
                if (obj) {
                    obj->SetTargetDesc(Text("preplanned target '") + elem->Name() + "'");
                    player_elem->AddObjective(obj);
                }

                // create flight plan:
                RLoc           rloc;
                Point          loc   = Point(0, 0, 15e3);
                Instruction*   n     = 0;

                PlanetaryInsertion(player_elem);

                // target approach and strike:
                Point delta = prime_target->Location() - loc;

                if (delta.length() >= 100e3) {
                    Point mid = loc + delta * 0.5;
                    mid.z = 10.0e3;

                    rloc.SetReferenceLoc(0);
                    rloc.SetBaseLocation(mid);
                    rloc.SetDistance(20e3);
                    rloc.SetDistanceVar(5e3);
                    rloc.SetAzimuth(90*DEGREES);
                    rloc.SetAzimuthVar(25*DEGREES);

                    n = new Instruction(prime_target->Region(),
                    Point(),
                    Instruction::VECTOR);
                    if (n) {
                        n->SetSpeed(750);
                        n->GetRLoc() = rloc;
                        player_elem->AddNavPoint(n);
                    }

                    loc = mid;
                }

                delta = loc - prime_target->Location();
                delta.Normalize();
                delta *= 25.0e3;

                loc = prime_target->Location() + delta;
                loc.z = 8.0e3;

                n = new Instruction(prime_target->Region(),
                loc,
                Instruction::STRIKE);
                if (n) {
                    n->SetSpeed(500);
                    player_elem->AddNavPoint(n);
                }

                // exeunt:
                rloc.SetReferenceLoc(0);
                rloc.SetBaseLocation(Point(0, 0, 30.0e3));
                rloc.SetDistance(50e3);
                rloc.SetDistanceVar(5e3);
                rloc.SetAzimuth(-90*DEGREES);
                rloc.SetAzimuthVar(25*DEGREES);

                n = new Instruction(prime_target->Region(),
                Point(),
                Instruction::VECTOR);
                if (n) {
                    n->SetSpeed(750);
                    n->GetRLoc() = rloc;
                    player_elem->AddNavPoint(n);
                }

                if (carrier_elem) {
                    rloc.SetReferenceLoc(0);
                    rloc.SetBaseLocation(carrier_elem->Location());
                    rloc.SetDistance(60e3);
                    rloc.SetDistanceVar(10e3);
                    rloc.SetAzimuth(180*DEGREES);
                    rloc.SetAzimuthVar(30*DEGREES);

                    n = new Instruction(carrier_elem->Region(),
                    Point(),
                    Instruction::RTB);
                    if (n) {
                        n->SetSpeed(750);
                        n->GetRLoc() = rloc;
                        player_elem->AddNavPoint(n);
                    }
                }

                break;
            }
        }
    }
}

// +--------------------------------------------------------------------+

void
CampaignMissionFighter::CreateTargetsAssault()
{
    if (!squadron || !player_elem) return;

    CombatGroup* assigned  = 0;

    if (request)
    assigned = request->GetObjective();

    if (assigned) {
        if (assigned->Type() > CombatGroup::WING && assigned->Type() < CombatGroup::FLEET) {
            mission->AddElement(CreateFighterPackage(assigned, 2, Mission::CARGO));
        }
        else {
            CreateElements(assigned);
        }

        // select the prime target element - choose the lowest ranking
        // unit of a DESRON, CBG, or CVBG:

        ListIter<MissionElement> e_iter = mission->GetElements();
        while (++e_iter) {
            MissionElement* elem = e_iter.value();

            if (elem->GetCombatGroup() == assigned) {
                if (!prime_target || assigned->Type() <= CombatGroup::CARRIER_GROUP) {
                    prime_target = elem;
                }
            }
        }

        if (prime_target) {
            MissionElement* elem = prime_target;

            Instruction* obj = new Instruction(Instruction::ASSAULT, elem->Name());
            if (obj) {
                obj->SetTargetDesc(Text("preplanned target '") + elem->Name() + "'");
                player_elem->AddObjective(obj);
            }

            // create flight plan:
            RLoc           rloc;
            Vec3           dummy(0,0,0);
            Instruction*   instr = 0;
            Point          loc   = player_elem->Location();
            Point          tgt   = elem->Location();
            Point          mid;

            CombatGroup* tgt_group = elem->GetCombatGroup();
            if (tgt_group && tgt_group->GetFirstUnit() && tgt_group->IsMovable()) {
                tgt = tgt_group->GetFirstUnit()->Location();
            }

            if (carrier_elem)
            loc = carrier_elem->Location();

            mid = loc + (elem->Location() - loc) * 0.5;

            rloc.SetReferenceLoc(0);
            rloc.SetBaseLocation(mid);
            rloc.SetDistance(40e3);
            rloc.SetDistanceVar(5e3);
            rloc.SetAzimuth(90*DEGREES);
            rloc.SetAzimuthVar(45*DEGREES);

            instr = new Instruction(elem->Region(), dummy, Instruction::VECTOR);
            if (instr) {
                instr->SetSpeed(750);
                instr->GetRLoc() = rloc;

                player_elem->AddNavPoint(instr);

                if (RandomChance()) {
                    CreateRandomTarget(elem->Region(), rloc.Location());
                }
            }

            rloc.SetReferenceLoc(0);
            rloc.SetBaseLocation(tgt);
            rloc.SetDistance(60e3);
            rloc.SetDistanceVar(5e3);
            rloc.SetAzimuth(120*DEGREES);
            rloc.SetAzimuthVar(15*DEGREES);

            instr = new Instruction(elem->Region(), dummy, Instruction::ASSAULT);
            if (instr) {
                instr->SetSpeed(750);
                instr->GetRLoc() = rloc;
                instr->SetTarget(elem->Name());

                player_elem->AddNavPoint(instr);
            }

            if (carrier_elem) {
                rloc.SetReferenceLoc(0);
                rloc.SetBaseLocation(loc);
                rloc.SetDistance(30e3);
                rloc.SetDistanceVar(0);
                rloc.SetAzimuth(180*DEGREES);
                rloc.SetAzimuthVar(60*DEGREES);

                instr = new Instruction(carrier_elem->Region(), dummy, Instruction::RTB);
                if (instr) {
                    instr->SetSpeed(500);
                    instr->GetRLoc() = rloc;

                    player_elem->AddNavPoint(instr);
                }
            }
        }
    }
}

// +--------------------------------------------------------------------+

int
CampaignMissionFighter::CreateRandomTarget(const char* rgn, Point base_loc)
{
    if (!mission) return 0;

    int  ntargets = 0;
    int  ttype    = RandomIndex();
    bool oca      = (mission->Type() == Mission::SWEEP);

    if (ttype < 8) {
        CombatGroup* s = 0;

        if (ttype < 4)
        s = FindSquadron(enemy, CombatGroup::INTERCEPT_SQUADRON);
        else
        s = FindSquadron(enemy, CombatGroup::FIGHTER_SQUADRON);

        if (s) {
            MissionElement* elem = CreateFighterPackage(s, 2, Mission::SWEEP);
            if (elem) {
                elem->SetIntelLevel(Intel::KNOWN);
                elem->SetRegion(rgn);
                elem->SetLocation(base_loc + RandomPoint() * 1.5);
                mission->AddElement(elem);
                ntargets++;
            }
        }
    }
    else if (ttype < 12) {
        if (oca) {
            CombatGroup* s = FindSquadron(enemy, CombatGroup::LCA_SQUADRON);

            if (s) {
                MissionElement* elem = CreateFighterPackage(s, 1, Mission::CARGO);
                if (elem) {
                    elem->SetIntelLevel(Intel::KNOWN);
                    elem->SetRegion(rgn);
                    elem->SetLocation(base_loc + RandomPoint() * 2);
                    mission->AddElement(elem);
                    ntargets++;

                    CombatGroup* s2 = FindSquadron(enemy, CombatGroup::FIGHTER_SQUADRON);

                    if (s2) {
                        MissionElement* e2 = CreateFighterPackage(s2, 2, Mission::ESCORT);
                        if (e2) {
                            e2->SetIntelLevel(Intel::KNOWN);
                            e2->SetRegion(rgn);
                            e2->SetLocation(elem->Location() + RandomPoint() * 0.5);

                            Instruction* obj = new Instruction(Instruction::ESCORT, elem->Name());
                            if (obj)
                            e2->AddObjective(obj);
                            mission->AddElement(e2);
                            ntargets++;
                        }
                    }
                }
            }
        }
        else {
            CombatGroup* s = FindSquadron(enemy, CombatGroup::ATTACK_SQUADRON);

            if (s) {
                MissionElement* elem = CreateFighterPackage(s, 2, Mission::ASSAULT);
                if (elem) {
                    elem->SetIntelLevel(Intel::KNOWN);
                    elem->SetRegion(rgn);
                    elem->SetLocation(base_loc + RandomPoint() * 1.3);
                    mission->AddElement(elem);
                    ntargets++;
                }
            }
        }
    }
    else if (ttype < 15) {
        if (oca) {
            CombatGroup* s = 0;

            if (airborne)
            s = FindSquadron(enemy, CombatGroup::LCA_SQUADRON);
            else
            s = FindSquadron(enemy, CombatGroup::FREIGHT);

            if (s) {
                MissionElement* elem = CreateFighterPackage(s, 1, Mission::CARGO);
                if (elem) {
                    elem->SetIntelLevel(Intel::KNOWN);
                    elem->SetRegion(rgn);
                    elem->SetLocation(base_loc + RandomPoint() * 2);
                    mission->AddElement(elem);
                    ntargets++;

                    CombatGroup* s2 = FindSquadron(enemy, CombatGroup::INTERCEPT_SQUADRON);

                    if (s2) {
                        MissionElement* e2 = CreateFighterPackage(s2, 2, Mission::ESCORT);
                        if (e2) {
                            e2->SetIntelLevel(Intel::KNOWN);
                            e2->SetRegion(rgn);
                            e2->SetLocation(elem->Location() + RandomPoint() * 0.5);

                            Instruction* obj = new Instruction(Instruction::ESCORT, elem->Name());
                            if (obj)
                            e2->AddObjective(obj);
                            mission->AddElement(e2);
                            ntargets++;
                        }
                    }
                }
            }
        }
        else {
            CombatGroup* s = FindSquadron(enemy, CombatGroup::ATTACK_SQUADRON);

            if (s) {
                MissionElement* elem = CreateFighterPackage(s, 2, Mission::ASSAULT);
                if (elem) {
                    elem->SetIntelLevel(Intel::KNOWN);
                    elem->SetRegion(rgn);
                    elem->SetLocation(base_loc + RandomPoint() * 1.1);
                    mission->AddElement(elem);
                    ntargets++;

                    CombatGroup* s2 = FindSquadron(enemy, CombatGroup::FIGHTER_SQUADRON);

                    if (s2) {
                        MissionElement* e2 = CreateFighterPackage(s2, 2, Mission::ESCORT);
                        if (e2) {
                            e2->SetIntelLevel(Intel::KNOWN);
                            e2->SetRegion(rgn);
                            e2->SetLocation(elem->Location() + RandomPoint() * 0.5);

                            Instruction* obj = new Instruction(Instruction::ESCORT, elem->Name());
                            if (obj)
                            e2->AddObjective(obj);
                            mission->AddElement(e2);
                            ntargets++;
                        }
                    }
                }
            }
        }
    }
    else {
        CombatGroup* s = FindSquadron(enemy, CombatGroup::LCA_SQUADRON);

        if (s) {
            MissionElement* elem = CreateFighterPackage(s, 2, Mission::CARGO);
            if (elem) {
                elem->SetIntelLevel(Intel::KNOWN);
                elem->SetRegion(rgn);
                elem->SetLocation(base_loc + RandomPoint() * 2);
                mission->AddElement(elem);
                ntargets++;
            }
        }
    }

    return ntargets;
}

// +--------------------------------------------------------------------+

void
CampaignMissionFighter::PlanetaryInsertion(MissionElement* elem)
{
    if (!mission || !elem)         return;
    if (!mission->GetStarSystem()) return;

    MissionElement* carrier = mission->FindElement(elem->Commander());
    StarSystem*    system   = mission->GetStarSystem();
    OrbitalRegion* rgn1     = system->FindRegion(elem->Region());
    OrbitalRegion* rgn2     = system->FindRegion(air_region);
    Point          npt_loc  = elem->Location();
    Instruction*   n        = 0;
    Player*        p        = Player::GetCurrentPlayer();

    int            flying_start = p ? p->FlyingStart() : 0;

    if (carrier && !flying_start) {
        npt_loc  = carrier->Location() + Point(1e3, -5e3, 0);
    }

    if (rgn1 && rgn2) {
        double   delta_t  = mission->Start() - campaign->GetTime();
        Point    r1       = rgn1->PredictLocation(delta_t);
        Point    r2       = rgn2->PredictLocation(delta_t);

        Point delta = r2 - r1;

        delta.y *= -1;
        delta.Normalize();
        delta *= 10e3;

        npt_loc += delta;

        n = new Instruction(elem->Region(),
        npt_loc,
        Instruction::VECTOR);
        if (n) {
            n->SetSpeed(750);
            elem->AddNavPoint(n);
        }
    }

    n = new Instruction(air_region,
    Point(0, 0, 15e3),
    Instruction::VECTOR);
    if (n) {
        n->SetSpeed(750);
        elem->AddNavPoint(n);
    }
}

void
CampaignMissionFighter::OrbitalInsertion(MissionElement* elem)
{
    Instruction* n = new Instruction(air_region,
    Point(0, 0, 30.0e3),
    Instruction::VECTOR);
    if (n) {
        n->SetSpeed(750);
        elem->AddNavPoint(n);
    }
}

// +--------------------------------------------------------------------+

MissionElement*
CampaignMissionFighter::CreateFighterPackage(CombatGroup* squadron, int count, int role)
{
    if (!squadron) return 0;

    CombatUnit* fighter = squadron->GetUnits().at(0);
    CombatUnit* carrier = FindCarrier(squadron);

    if (!fighter)
    return 0;

    int avail  = fighter->LiveCount();
    int actual = count;

    if (avail < actual)
    actual = avail;

    if (avail < 1) {
        ::Print("CMF - Insufficient fighters in squadron '%s' - %d required, %d available\n",
        squadron->Name().data(), count, avail);
        return 0;
    }

    MissionElement* elem = new MissionElement;
    if (!elem) {
        Exit();
        return 0;
    }

    elem->SetName(Callsign::GetCallsign(fighter->GetIFF()));
    elem->SetElementID(pkg_id++);

    if (carrier) {
        elem->SetCommander(carrier->Name());
        elem->SetHeading(carrier->GetHeading());
    }
    else {
        elem->SetHeading(fighter->GetHeading());
    }

    elem->SetDesign(fighter->GetDesign());
    elem->SetCount(actual);
    elem->SetIFF(fighter->GetIFF());
    elem->SetIntelLevel(squadron->IntelLevel());
    elem->SetRegion(fighter->GetRegion());
    elem->SetSquadron(squadron->Name());
    elem->SetMissionRole(role);

    switch (role) {
    case Mission::ASSAULT:
        if (request->GetObjective() &&
                request->GetObjective()->Type() == CombatGroup::MINEFIELD)
        elem->Loadouts().append(new MissionLoad(-1, "Rockets"));
        else
        elem->Loadouts().append(new MissionLoad(-1, "Ship Strike"));
        break;

    case Mission::STRIKE:
        elem->Loadouts().append(new MissionLoad(-1, "Ground Strike"));
        break;

    default:
        elem->Loadouts().append(new MissionLoad(-1, "ACM Medium Range"));
        break;
    }

    if (carrier) {
        Point offset = RandomPoint() * 0.3;
        offset.y = fabs(offset.y);
        offset.z += 2e3;
        elem->SetLocation(carrier->Location() + offset);
    }
    else {
        elem->SetLocation(fighter->Location() + RandomPoint());
    }

    elem->SetCombatGroup(squadron);
    elem->SetCombatUnit(fighter);

    return elem;
}

// +--------------------------------------------------------------------+

static CombatGroup* FindCombatGroup(CombatGroup* g, int type)
{
    if (g->IntelLevel() <= Intel::RESERVE)
    return 0;

    if (g->GetUnits().size() > 0) {
        for (int i = 0; i < g->GetUnits().size(); i++) {
            CombatUnit* u = g->GetUnits().at(i);
            if (g->Type() == type && u->LiveCount() > 0)
            return g;
        }
    }

    CombatGroup* result = 0;

    ListIter<CombatGroup> subgroup = g->GetComponents();
    while (++subgroup && !result)
    result = FindCombatGroup(subgroup.value(), type);

    return result;
}

// +--------------------------------------------------------------------+

CombatGroup*
CampaignMissionFighter::FindSquadron(int iff, int type)
{
    if (!squadron) return 0;

    CombatGroup*   result   = 0;
    Campaign*      campaign = Campaign::GetCampaign();

    if (campaign) {
        ListIter<Combatant> combatant = campaign->GetCombatants();
        while (++combatant && !result) {
            if (combatant->GetIFF() == iff) {
                result = ::FindCombatGroup(combatant->GetForce(), type);

                if (result && result->CountUnits() < 1) {
                    result = 0;
                }
            }
        }
    }

    return result;
}

// +--------------------------------------------------------------------+

void
CampaignMissionFighter::DefineMissionObjectives()
{
    if (!mission || !player_elem) return;

    if (prime_target)    mission->SetTarget(prime_target);
    if (ward)            mission->SetWard(ward);

    Text objectives;

    for (int i = 0; i < player_elem->Objectives().size(); i++) {
        Instruction* obj = player_elem->Objectives().at(i);
        objectives += "* ";
        objectives += obj->GetDescription();
        objectives += ".\n";
    }

    mission->SetObjective(objectives);
}

// +--------------------------------------------------------------------+

MissionInfo*
CampaignMissionFighter::DescribeMission()
{
    if (!mission || !player_elem) return 0;

    char name[256];
    char player_info[256];

    if (mission_info && mission_info->name.length())
        sprintf_s(name, "MSN-%03d %s", mission->Identity(), mission_info->name.data());
    else if (ward)
        sprintf_s(name, "MSN-%03d %s %s", mission->Identity(), ContentBundle::GetInstance()->GetText(mission->TypeName()).data(), ward->Name().data());
    else if (prime_target)
        sprintf_s(name, "MSN-%03d %s %s %s", mission->Identity(), ContentBundle::GetInstance()->GetText(mission->TypeName()).data(),
                    Ship::ClassName(prime_target->GetDesign()->type),
                    prime_target->Name().data());
    else
        sprintf_s(name, "MSN-%03d %s", mission->Identity(), ContentBundle::GetInstance()->GetText(mission->TypeName()).data());

    if (player_elem) {
        sprintf_s(player_info, "%d x %s %s '%s'",
            player_elem->Count(),
            (const char*) player_elem->GetDesign()->abrv,
            (const char*) player_elem->GetDesign()->name,
            (const char*) player_elem->Name());
    }

    MissionInfo* info = new MissionInfo;

    info->id          = mission->Identity();
    info->mission     = mission;
    info->name        = name;
    info->type        = mission->Type();
    info->player_info = player_info;
    info->description = mission->Objective();
    info->start       = mission->Start();

    if (mission->GetStarSystem())
    info->system      = mission->GetStarSystem()->Name();
    info->region      = mission->GetRegion();

    mission->SetName(name);

    return info;
}

// +--------------------------------------------------------------------+

void
CampaignMissionFighter::Exit()
{
    if (auto game = Game::GetInstance())
        game->SetGameMode(Game::MENU_MODE);
}