#include <cmath>
#include <cstdio>
#include <ctime>
#include <sys/nearptr.h>

#include "audio/AudioPlayer.h"
#include "audio/Music.h"
#include "system/Timer.h"
#include "system/Video.h"
#include "graphics/Bitmap.h"
#include "graphics/Font.h"

#include "scenes/Scene.h"
#include "system/Keyboard.h"
#include "util/Files.h"
#include "util/Gbm.h"
#include "util/Log.h"

volatile bool showFps = true;
volatile bool running = true;

uint8_t *loadMusicFile(const char *filename) {
	void *data = nullptr;
	Files::allocateBufferAndLoadFromFile(filename, &data);
	return static_cast<uint8_t*>(data);
}

int main() {
	__djgpp_nearptr_enable();
	srand(time(nullptr));

	DefaultLog.log("Loading music\n");
	Music music("spiral.rad");
	if (!music.isValid()) {
		printf("Unable to load song\n");
		return 1;
	}

	DefaultLog.log("Playing music\n");
	audioPlayer.playMusic(music);

	DefaultLog.log("Changing video mode\n");
	video.Enter();

	// Run scenes
	auto fb = static_cast<uint8_t *>(video.GetFB());

	unsigned fps{0};
	unsigned frameCount{0};
	uint32_t fpsTick{0};
	char fpsDigits[3]{'0', '0', 0};
	auto fontBitmap = Gbm::loadFromFile("font1.gbm");
	Font font(&fontBitmap, 7, 9, 32, 127);

	keyboard.setKeyDownHandler([] (unsigned char key) {
		DefaultLog.log("KeyDown %u (%s)\n", key, keyboard.getKeyName(key));
	});
	keyboard.setKeyUpHandler([] (unsigned char key) {
		DefaultLog.log("KeyUp %u (%s)\n", key, keyboard.getKeyName(key));
		switch (key) {
			case KeyEscape:
				running = false;
				break;
			case KeyF:
				showFps = !showFps;
				break;
			default:
				// Do nothing
				break;
		}
	});
	keyboard.setKeyRepeatHandler([](unsigned char key) {
		DefaultLog.log("KeyRepeat %u (%s)\n", key, keyboard.getKeyName(key));
	});

	while (running) {
		auto scene = Scenes::getCurrentScene();

		scene->run();

		// Render fps
		if (showFps) {
			++frameCount;
			auto ticks = timer.getTicks();
			if (ticks > fpsTick + 50) {
				fpsTick = ticks;
				fps = frameCount;
				frameCount = 0;
				fpsDigits[0] = '0' + (fps / 10) % 10;
				fpsDigits[1] = '0' + fps % 10;
			}

			font.renderChar(fpsDigits[0], 0, 0, 242, 0, fb, SCREEN_WIDTH, SCREEN_HEIGHT);
			font.renderChar(fpsDigits[1], 7, 0, 242, 0, fb, SCREEN_WIDTH, SCREEN_HEIGHT);

			video.UpdateRect({0, 0, 14, 9 });
		}

		// Wait for vertical retrace and then copy render buffer to screen
		video.WaitForVerticalSync();
		video.Flip();
	}

	audioPlayer.stopMusic();
}