/*  Starshatter OpenSource Distribution
    Copyright (c) 1997-2004, Destroyer Studios LLC.
    All Rights Reserved.

    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice,
      this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright notice,
      this list of conditions and the following disclaimer in the documentation
      and/or other materials provided with the distribution.
    * Neither the name "Destroyer Studios" nor the names of its contributors
      may be used to endorse or promote products derived from this software
      without specific prior written permission.

    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    POSSIBILITY OF SUCH DAMAGE.

    SUBSYSTEM:    Stars.exe
    FILE:         MusicDirector.cpp
    AUTHOR:       John DiCamillo


    OVERVIEW
    ========
    Music Director class to manage selection, setup, and playback
    of background music tracks for both menu and game modes
*/


#include "MemDebug.h"
#include "MusicDirector.h"
#include "MusicTrack.h"

#include "Random.h"
#include "DataLoader.h"
#include "FormatUtil.h"
#include "Sound.h"

static MusicDirector* music_director = 0;

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

MusicDirector::MusicDirector()
: mode(0), transition(0), track(0), next_track(0), no_music(true),
hproc(0)
{
    music_director = this;

    ScanTracks();

    if (!no_music)
    StartThread();
}

MusicDirector::~MusicDirector()
{
    StopThread();

    delete track;
    delete next_track;

    menu_tracks.destroy();
    intro_tracks.destroy();
    brief_tracks.destroy();
    debrief_tracks.destroy();
    promote_tracks.destroy();
    flight_tracks.destroy();
    combat_tracks.destroy();
    launch_tracks.destroy();
    recovery_tracks.destroy();
    victory_tracks.destroy();
    defeat_tracks.destroy();
    credit_tracks.destroy();

    if (this == music_director)
    music_director = 0;
}

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

void
MusicDirector::Initialize()
{
    if (music_director) delete music_director;
    music_director = new(__FILE__,__LINE__) MusicDirector();
}

void
MusicDirector::Close()
{
    delete music_director;
    music_director = 0;
}

MusicDirector*
MusicDirector::GetInstance()
{
    return music_director;
}

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

void
MusicDirector::ExecFrame()
{
    if (no_music) return;

    AutoThreadSync a(sync);

    if (next_track && !track) {
        track = next_track;
        next_track = 0;
    }

    if (track) {
        if (track->IsDone()) {
            if (mode != NONE && mode != SHUTDOWN && next_track == 0) {
                GetNextTrack(track->GetIndex()+1);
            }

            delete track;
            track = next_track;
            next_track = 0;
        }

        else if (track->IsLooped()) {
            if (mode != NONE && mode != SHUTDOWN && next_track == 0) {
                GetNextTrack(track->GetIndex()+1);
            }

            track->FadeOut();
            track->ExecFrame();
        }

        else {
            track->ExecFrame();
        }
    }

    if (next_track) {
        if (next_track->IsDone()) {
            delete next_track;
            next_track = 0;
        }

        else if (next_track->IsLooped()) {
            next_track->FadeOut();
            next_track->ExecFrame();
        }

        else {
            next_track->ExecFrame();
        }
    }
}

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

void
MusicDirector::ScanTracks()
{
    DataLoader* loader = DataLoader::GetLoader();

    bool old_file_system = loader->IsFileSystemEnabled();
    loader->UseFileSystem(true);
    loader->SetDataPath("Music/");

    List<Text> files;
    loader->ListFiles("*.ogg", files, true);

    if (files.size() == 0) {
        loader->UseFileSystem(old_file_system);
        no_music = true;
        return;
    }

    no_music = false;

    ListIter<Text> iter = files;
    while (++iter) {
        Text* name = iter.value();
        Text* file = new(__FILE__,__LINE__) Text("Music/");

        name->setSensitive(false);
        file->append(*name);

        if (name->indexOf("Menu") == 0) {
            menu_tracks.append(file);
        }

        else if (name->indexOf("Intro") == 0) {
            intro_tracks.append(file);
        }

        else if (name->indexOf("Brief") == 0) {
            brief_tracks.append(file);
        }

        else if (name->indexOf("Debrief") == 0) {
            debrief_tracks.append(file);
        }

        else if (name->indexOf("Promot") == 0) {
            promote_tracks.append(file);
        }

        else if (name->indexOf("Flight") == 0) {
            flight_tracks.append(file);
        }

        else if (name->indexOf("Combat") == 0) {
            combat_tracks.append(file);
        }

        else if (name->indexOf("Launch") == 0) {
            launch_tracks.append(file);
        }

        else if (name->indexOf("Recovery") == 0) {
            recovery_tracks.append(file);
        }

        else if (name->indexOf("Victory") == 0) {
            victory_tracks.append(file);
        }

        else if (name->indexOf("Defeat") == 0) {
            defeat_tracks.append(file);
        }

        else if (name->indexOf("Credit") == 0) {
            credit_tracks.append(file);
        }

        else {
            menu_tracks.append(file);
        }

        delete iter.removeItem();
    }

    loader->UseFileSystem(old_file_system);

    menu_tracks.sort();
    intro_tracks.sort();
    brief_tracks.sort();
    debrief_tracks.sort();
    promote_tracks.sort();
    flight_tracks.sort();
    combat_tracks.sort();
    launch_tracks.sort();
    recovery_tracks.sort();
    victory_tracks.sort();
    defeat_tracks.sort();
    credit_tracks.sort();
}

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

const char*
MusicDirector::GetModeName(int mode)
{
    switch (mode) {
    case NONE:        return "NONE";
    case MENU:        return "MENU";
    case INTRO:       return "INTRO";
    case BRIEFING:    return "BRIEFING";
    case DEBRIEFING:  return "DEBRIEFING";
    case PROMOTION:   return "PROMOTION";
    case FLIGHT:      return "FLIGHT";
    case COMBAT:      return "COMBAT";
    case LAUNCH:      return "LAUNCH";
    case RECOVERY:    return "RECOVERY";
    case VICTORY:     return "VICTORY";
    case DEFEAT:      return "DEFEAT";
    case CREDITS:     return "CREDITS";
    case SHUTDOWN:    return "SHUTDOWN";
    }

    return "UNKNOWN?";
}

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

void
MusicDirector::SetMode(int mode)
{
    if (!music_director || music_director->no_music) return;

    AutoThreadSync a(music_director->sync);

    // stay in intro mode until it is complete:
    if (mode == MENU && (music_director->GetMode() == NONE ||
                music_director->GetMode() == INTRO))
    mode = INTRO;

    mode = music_director->CheckMode(mode);

    if (mode != music_director->mode) {
        ::Print("MusicDirector::SetMode() old: %s  new: %s\n",
        GetModeName(music_director->mode),
        GetModeName(mode));

        music_director->mode = mode;

        MusicTrack* t = music_director->track;
        if (t && t->GetState() && !t->IsDone()) {
            if (mode == NONE || mode == SHUTDOWN)
            t->SetFadeTime(0.5);

            t->FadeOut();
        }

        t = music_director->next_track;
        if (t && t->GetState() && !t->IsDone()) {
            if (mode == NONE || mode == SHUTDOWN)
            t->SetFadeTime(0.5);
            t->FadeOut();

            delete music_director->track;
            music_director->track      = t;
            music_director->next_track = 0;
        }

        music_director->ShuffleTracks();
        music_director->GetNextTrack(0);

        if (music_director->next_track)
        music_director->next_track->FadeIn();
    }
}

int
MusicDirector::CheckMode(int req_mode)
{
    if (req_mode == RECOVERY && recovery_tracks.size() == 0)
    req_mode = LAUNCH;

    if (req_mode == LAUNCH && launch_tracks.size() == 0)
    req_mode = FLIGHT;

    if (req_mode == COMBAT && combat_tracks.size() == 0)
    req_mode = FLIGHT;

    if (req_mode == FLIGHT && flight_tracks.size() == 0)
    req_mode = NONE;

    if (req_mode == PROMOTION && promote_tracks.size() == 0)
    req_mode = VICTORY;

    if (req_mode == DEBRIEFING && debrief_tracks.size() == 0)
    req_mode = BRIEFING;

    if (req_mode == BRIEFING && brief_tracks.size() == 0)
    req_mode = MENU;

    if (req_mode == INTRO && intro_tracks.size() == 0)
    req_mode = MENU;

    if (req_mode == VICTORY && victory_tracks.size() == 0)
    req_mode = MENU;

    if (req_mode == DEFEAT && defeat_tracks.size() == 0)
    req_mode = MENU;

    if (req_mode == CREDITS && credit_tracks.size() == 0)
    req_mode = MENU;

    if (req_mode == MENU && menu_tracks.size() == 0)
    req_mode = NONE;

    return req_mode;
}

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

bool
MusicDirector::IsNoMusic()
{
    if (music_director)
    return music_director->no_music;

    return true;
}

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

void
MusicDirector::GetNextTrack(int index)
{
    List<Text>* tracks = 0;

    switch (mode) {
    case MENU:        tracks = &menu_tracks;     break;
    case INTRO:       tracks = &intro_tracks;    break;
    case BRIEFING:    tracks = &brief_tracks;    break;
    case DEBRIEFING:  tracks = &debrief_tracks;  break;
    case PROMOTION:   tracks = &promote_tracks;  break;
    case FLIGHT:      tracks = &flight_tracks;   break;
    case COMBAT:      tracks = &combat_tracks;   break;
    case LAUNCH:      tracks = &launch_tracks;   break;
    case RECOVERY:    tracks = &recovery_tracks; break;
    case VICTORY:     tracks = &victory_tracks;  break;
    case DEFEAT:      tracks = &defeat_tracks;   break;
    case CREDITS:     tracks = &credit_tracks;   break;
    default:          tracks = 0;                break;
    }

    if (tracks && tracks->size()) {
        if (next_track)
        delete next_track;

        if (index < 0 || index >= tracks->size()) {
            index = 0;

            if (mode == INTRO) {
                mode = MENU;
                ShuffleTracks();
                tracks = &menu_tracks;

                ::Print("MusicDirector: INTRO mode complete, switching to MENU\n");

                if (!tracks->size())
                return;
            }
        }

        next_track = new(__FILE__,__LINE__) MusicTrack(*tracks->at(index), mode, index);
        next_track->FadeIn();
    }

    else if (next_track) {
        next_track->FadeOut();
    }
}

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

void
MusicDirector::ShuffleTracks()
{
    List<Text>* tracks = 0;

    switch (mode) {
    case MENU:        tracks = &menu_tracks;     break;
    case INTRO:       tracks = &intro_tracks;    break;
    case BRIEFING:    tracks = &brief_tracks;    break;
    case DEBRIEFING:  tracks = &debrief_tracks;  break;
    case PROMOTION:   tracks = &promote_tracks;  break;
    case FLIGHT:      tracks = &flight_tracks;   break;
    case COMBAT:      tracks = &combat_tracks;   break;
    case LAUNCH:      tracks = &launch_tracks;   break;
    case RECOVERY:    tracks = &recovery_tracks; break;
    case VICTORY:     tracks = &victory_tracks;  break;
    case DEFEAT:      tracks = &defeat_tracks;   break;
    case CREDITS:     tracks = &credit_tracks;   break;
    default:          tracks = 0;                break;
    }

    if (tracks && tracks->size() > 1) {
        tracks->sort();

        Text* t = tracks->at(0);

        if (!isdigit(*t[0]))
        tracks->shuffle();
    }
}

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

DWORD WINAPI MusicDirectorThreadProc(LPVOID link);

void
MusicDirector::StartThread()
{
    if (hproc != 0) {
        DWORD result = 0;
        GetExitCodeThread(hproc, &result);

        if (result != STILL_ACTIVE) {
            CloseHandle(hproc);
            hproc = 0;
        }
        else {
            return;
        }
    }

    if (hproc == 0) {
        DWORD thread_id = 0;
        hproc = CreateThread(0, 4096, MusicDirectorThreadProc, (LPVOID) this, 0, &thread_id);

        if (hproc == 0) {
            static int report = 10;
            if (report > 0) {
                ::Print("WARNING: MusicDirector failed to create thread (err=%08x)\n", GetLastError());
                report--;

                if (report == 0)
                ::Print("         Further warnings of this type will be supressed.\n");
            }
        }
    }
}

void
MusicDirector::StopThread()
{
    if (hproc != 0) {
        SetMode(SHUTDOWN);
        WaitForSingleObject(hproc, 1500);
        CloseHandle(hproc);
        hproc = 0;
    }
}

DWORD WINAPI MusicDirectorThreadProc(LPVOID link)
{
    MusicDirector* dir = (MusicDirector*) link;

    if (dir) {
        while (dir->GetMode() != MusicDirector::SHUTDOWN) {
            dir->ExecFrame();
            Sleep(100);
        }

        return 0;
    }

    return (DWORD) E_POINTER;
}