#ifdef USE_CLI_DEBUGGER
#include "debugger/cli-debugger.h"
#endif

#ifdef USE_GDB_STUB
#include "debugger/gdb-stub.h"
#endif

#include "gba-thread.h"
#include "gba.h"
#include "renderers/video-software.h"
#include "sdl-audio.h"
#include "sdl-events.h"

#include <SDL.h>

#include <errno.h>
#include <signal.h>
#include <sys/time.h>

struct SoftwareRenderer {
	struct GBAVideoSoftwareRenderer d;
	struct GBASDLAudio audio;
	struct GBASDLEvents events;
};

static int _GBASDLInit(struct SoftwareRenderer* renderer);
static void _GBASDLDeinit(struct SoftwareRenderer* renderer);
static void _GBASDLRunloop(struct GBAThread* context, struct SoftwareRenderer* renderer);
static void _GBASDLStart(struct GBAThread* context);
static void _GBASDLClean(struct GBAThread* context);

int main(int argc, char** argv) {
	struct SoftwareRenderer renderer;
	GBAVideoSoftwareRendererCreate(&renderer.d);

	struct StartupOptions opts;
	if (!parseCommandArgs(&opts, argc, argv, GRAPHICS_OPTIONS)) {
		usage(argv[0], GRAPHICS_USAGE);
		return 1;
	}

	if (!_GBASDLInit(&renderer)) {
		return 1;
	}

	struct GBAThread context = {
		.renderer = &renderer.d.d,
		.startCallback = _GBASDLStart,
		.cleanCallback = _GBASDLClean,
		.sync.videoFrameWait = 0,
		.sync.audioWait = 1,
		.userData = &renderer
	};

	context.debugger = createDebugger(&opts);

	GBAMapOptionsToContext(&opts, &context);

	SDL_Surface* surface = SDL_GetVideoSurface();
	SDL_LockSurface(surface);
	renderer.d.outputBuffer = surface->pixels;
#ifdef COLOR_16_BIT
	renderer.d.outputBufferStride = surface->pitch / 2;
#else
	renderer.d.outputBufferStride = surface->pitch / 4;
#endif

	GBAThreadStart(&context);

	_GBASDLRunloop(&context, &renderer);

	SDL_UnlockSurface(surface);
	GBAThreadJoin(&context);
	close(opts.fd);
	if (opts.biosFd >= 0) {
		close(opts.biosFd);
	}
	free(context.debugger);

	_GBASDLDeinit(&renderer);

	return 0;
}

static int _GBASDLInit(struct SoftwareRenderer* renderer) {
	if (SDL_Init(SDL_INIT_VIDEO) < 0) {
		return 0;
	}

	GBASDLInitEvents(&renderer->events);
	GBASDLInitAudio(&renderer->audio);

#ifdef COLOR_16_BIT
	SDL_SetVideoMode(240, 160, 16, SDL_DOUBLEBUF | SDL_HWSURFACE);
#else
	SDL_SetVideoMode(240, 160, 32, SDL_DOUBLEBUF | SDL_HWSURFACE);
#endif

	return 1;
}

static void _GBASDLRunloop(struct GBAThread* context, struct SoftwareRenderer* renderer) {
	SDL_Event event;
	SDL_Surface* surface = SDL_GetVideoSurface();

	while (context->state < THREAD_EXITING) {
		if (GBASyncWaitFrameStart(&context->sync, context->frameskip)) {
			SDL_UnlockSurface(surface);
			SDL_Flip(surface);
			SDL_LockSurface(surface);
		}
		GBASyncWaitFrameEnd(&context->sync);

		while (SDL_PollEvent(&event)) {
			GBASDLHandleEvent(context, &renderer->events, &event);
		}
	}
}

static void _GBASDLDeinit(struct SoftwareRenderer* renderer) {
	GBASDLDeinitEvents(&renderer->events);
	GBASDLDeinitAudio(&renderer->audio);
	SDL_Quit();
}

static void _GBASDLStart(struct GBAThread* threadContext) {
	struct SoftwareRenderer* renderer = threadContext->userData;
	renderer->audio.audio = &threadContext->gba->audio;
}

static void _GBASDLClean(struct GBAThread* threadContext) {
	struct SoftwareRenderer* renderer = threadContext->userData;
	renderer->audio.audio = 0;
}