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/*  Starshatter: The Open Source Project
    Copyright (c) 2021-2022, 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
    ========
    Common base class and interface for mid-level (tactical) AI
*/

#ifndef TacticalAI_h
#define TacticalAI_h

#include "Types.h"
#include "Director.h"

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

class Ship;
class ShipAI;
class Instruction;
class CarrierAI;

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

class TacticalAI : public Director
{
public:
    TacticalAI(ShipAI* ai);
    virtual ~TacticalAI();

    enum ROE {
        NONE,
        SELF_DEFENSIVE,
        DEFENSIVE,
        DIRECTED,
        FLEXIBLE,
        AGRESSIVE
    };

    virtual void      ExecFrame(double seconds);

    virtual ROE       RulesOfEngagement()  const { return roe;           }
    virtual double    ThreatLevel()        const { return threat_level;  }
    virtual double    SupportLevel()       const { return support_level; }

protected:
    // pick the best target if we don't have one yet:
    virtual void      CheckOrders();
    virtual bool      CheckShipOrders();
    virtual bool      ProcessOrders();
    virtual bool      CheckFlightPlan();
    virtual bool      CheckObjectives();

    virtual void      SelectTarget();
    virtual void      SelectTargetDirected(Ship* tgt=0);
    virtual void      SelectTargetOpportunity();
    virtual void      CheckTarget();
    virtual void      FindThreat();
    virtual void      FindSupport();
    virtual void      FindFormationSlot(int formation);

    virtual bool      CanTarget(Ship* tgt);
    virtual void      ClearRadioOrders();

    Ship*             ship;
    ShipAI*           ship_ai;
    CarrierAI*        carrier_ai;

    Instruction*      navpt;
    Instruction*      orders;

    double            agression;
    ROE               roe;
    int               element_index;
    int               action;
    int               exec_time;
    int               directed_tgtid;

    double            threat_level;
    double            support_level;
};

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

#endif  // TacticalAI_h