/*
 * Copyright (c) 2004-2006  Kazunori "jagarl" Ueno
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */

#include <SDL.h>
#include "system.h"
#include <iostream>
#include <stdio.h>

using namespace std;

// void SDL_SetEventFilter(SDL_EventFilter filter);
// typedef int (*SDL_EventFilter)(const SDL_Event *event);
namespace System {
	Main* Main::instance = NULL;

	int Main::event_filter(const SDL_Event* event) {
		return 1; /* throw all event */
	}

	Main::Main(void) {
		instance = this;
		framerate = 20;
		cursor = NULL;
	}

	Main::~Main() {
		if (cursor) delete cursor;
	}

	void Main::Quit(void) {
		is_exit = true;
	}

	void Main::EnableVideo(void) {
		is_video_update = true;
	}

	void Main::DisableVideo(void) {
		is_video_update = false;
	}

	bool Main::is_exit = false;
	bool Main::is_video_update = true;

	void Main::Mainloop(void) {
		SDL_SetEventFilter(&event_filter);
		Uint32 old_time = 0;
		while(!is_exit) {
			Uint32 start_time = SDL_GetTicks();
			if (! event.Exec(start_time)) break;
			if (start_time - old_time > 1000/framerate) {
				if (is_video_update) root.ExecUpdate();
				event.Exec(Event::Time::FRAME_UPDATE);
				cout.flush();
				old_time = start_time;
			}

	// 問題：
	// z 軸と xy 軸の相互干渉；高速化
	// 移動するウィジット描画の高速化
	// キャッシュ
	// 文字列の一部のみ更新の高速化
	// 「階層 z で x なる領域無効化、y なる領域生成」で良い？＞Expose
	/*
			Uint32 end_time = SDL_GetTicks();
			Uint32 delay = (end_time-start_time);
			if(delay < 1000/framerate) SDL_Delay(1000/framerate - delay);
			else SDL_Delay(0);
	*/
			SDL_Delay(0);
		}
	}

	void Main::SetCursor(Surface* s, const Rect& r) {
		if (instance == NULL) return;
		if (instance->cursor) delete instance->cursor;
		if (s == NULL) { // カーソル消去
			instance->cursor = NULL;
		} else if (s == DEFAULT_MOUSECURSOR) {
			instance->cursor = NULL;
			SDL_ShowCursor(SDL_ENABLE);
		} else {
			instance->cursor = new WidMouseCursor(instance->event, instance->root.root, s, r.lx, r.ty, r.width(), r.height());
			instance->cursor->show();
			SDL_ShowCursor(SDL_DISABLE);
		}
	}
}