/*  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

*/

#include "Game.h"
#include "Mouse.h"
#include "Universe.h"
#include "Window.h"
#include "EventDispatch.h"
#include "DataLoader.h"
#include "Panic.h"
#include "Pcx.h"
#include "Bitmap.h"
#include "MachineInfo.h"
#include "VideoSettings.h"
#include "ContentBundle.h"
#include "Clock.h"
#include "WndProc.h"
#include "SoundCard.h"

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

Game*    game           = 0;

const double MAX_FRAME_TIME_NORMAL  = 1.0 / 5.0;

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

Game::Game() :
    world(0),
    status(Game::OK),
    exit_code(0),
    game_mode(MENU_MODE)
{
    Clock::Init();
    if (!game) {
        game = this;

        active         = false;
        paused         = false;
        server         = false;
        show_mouse     = false;
        frame_number   = 0;

        max_frame_length = MAX_FRAME_TIME_NORMAL;
    }
    else
    status = TOO_MANY;
}

Game::~Game()
{
    if (game == this)
    game = 0;

    Clock::Close();

    delete world;
}

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

bool
Game::Init(HINSTANCE hi, HINSTANCE hpi, LPSTR cmdline, int nCmdShow)
{
    status = OK;

    if (status == OK) {
        Print("  Initializing content...\n");
        ContentBundle::GetInstance()->Init();

        Print("  Initializing game...\n");
        if (!InitGame()) {
            if (Panic::Panicked())
            Panic::Panic("Could not initialize the game.");
            status = INIT_FAILED;
        }
    }

    return status == OK;
}

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

bool
Game::InitGame()
{
    if (server) {
        Print("  InitGame() - server mode.\n");
    }
    return true;
}

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

int
Game::Run()
{
    status = RUN;
    Clock::GetInstance()->Set();
    while (status < EXIT && !Panic::Panicked()) {
        GameLoop();
    }
    return exit_code;
}

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

void
Game::Exit()
{
    Print("\n\n*** Game::Exit()\n");
    status = EXIT;
}

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

void
Game::Activate(bool f)
{
    active = f;
}

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

void
Game::Pause(bool f)
{
    paused = f;
}

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

bool
Game::GameLoop()
{
    bool wait_for_windows_events = true;

    if (active && !paused) {
        if (!server) {
            // Route Events to EventTargets
            EventDispatch* ed = EventDispatch::GetInstance();
            if (ed)
            ed->Dispatch();
        }

        UpdateWorld();
        GameState();

        if (!server) {
            UpdateScreen();
        }

        wait_for_windows_events = false;
    }
    else if (active && paused) {
        if (GetKey()=='P')
        Pause(false);
    }

    Clock::GetInstance()->Step();
    frame_number++;
    Mouse::w = 0;
    return wait_for_windows_events;
}

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

void
Game::UpdateWorld()
{
    if (world)
    world->ExecFrame(Clock::GetInstance()->Delta());
}

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

void
Game::GameState()
{
}

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

void
Game::UpdateScreen()
{
}

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

Game*
Game::GetInstance()
{
    return game;
}

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

DWORD Game::Frame()
{
    return frame_number;
}