#include <SDL.h>
#include "init.h"
#include "logging.h"
#include "resources/image.h"
#include "resources/map.h"
#include "viewport.h"
#include "area.h"
#include "palettes.h"

#define DEMO()                                                                 \
	do {                                                                   \
		vp->x = x + map->tilewidth / 2 - vp->w / 2;                    \
		vp->y = y + map->tileheight / 2 - vp->h / 2;                   \
		render_area_to_viewport(a, vp);                                \
		SDL_Flip(vp->screen);                                          \
		SDL_Delay(10);                                                 \
		++i;                                                           \
	} while (0)

int
main(void)
{
	struct viewport *vp;
	struct map *map;
	struct area *a;
	SDL_Palette *pal;
	int i;
	struct map_exit *e;

	init();
	vp = init_viewport(240, 160, 8);

	map = map_get(MAPSDIR "/forest1-8bit.tmx");
	if (map == NULL) {
		map = map_get("data/maps/forest1-8bit.tmx");
	}
	if (map == NULL) {
		err(1, "Where's the map, George?");
	}
	pal = map->palettes[MAP_PALETTE_DAY].palette->palette;
	if (!SDL_SetPalette(vp->screen, SDL_LOGPAL, pal->colors,
				0, pal->ncolors)) {
		warn("Failed to set palette");
	}
	a = area_new(map, vp);

	for (e = map->map_exits_head; e != NULL; e = e->next) {
		debug("Map exit (size %dx%d) at (%d,%d) "
				"to map %s (size %dx%d) at (%d,%d)",
				e->width, e->height,
				e->x, e->y,
				e->target_map_name,
				e->target_map->width, e->target_map->height,
				e->target_x_coord, e->target_y_coord);
	}

	render_area_to_viewport(a, vp);
	{
		Uint32 d, t;

		pal = malloc(sizeof(*pal));
		pal->colors = calloc(58, sizeof(*pal->colors));
		pal->ncolors = 58;

		for (d = 0; d < 4; ++d) {
			t = 0;
			debug("Day %d morn", d);
			/* morn -> day */
			for (; t < 360; t += 1) {
				if (cycle_palettes_cosine(t, 360,
						map->palettes[MAP_PALETTE_MORN]
							.palette->palette,
						map->palettes[MAP_PALETTE_DAY]
							.palette->palette,
						pal) == NULL) {
					warn("Failed to cycle palettes");
				}
				if (!SDL_SetPalette(vp->screen, SDL_LOGPAL,
							pal->colors,
							0, pal->ncolors)) {
					warn("Failed to set palette");
				}
				SDL_Flip(vp->screen);
				SDL_Delay(10);
			}
			debug("Day %d day", d);
			/* day -> eve */
			for (; t < 720; t += 1) {
				if (cycle_palettes_cosine(t, 360,
						map->palettes[MAP_PALETTE_DAY]
							.palette->palette,
						map->palettes[MAP_PALETTE_EVE]
							.palette->palette,
						pal) == NULL) {
					warn("Failed to cycle palettes");
				}
				if (!SDL_SetPalette(vp->screen, SDL_LOGPAL,
							pal->colors,
							0, pal->ncolors)) {
					warn("Failed to set palette");
				}
				SDL_Flip(vp->screen);
				SDL_Delay(10);
			}
			debug("Day %d eve", d);
			/* eve -> night */
			for (; t < 1080; t += 1) {
				if (cycle_palettes_cosine(t, 360,
						map->palettes[MAP_PALETTE_EVE]
							.palette->palette,
						map->palettes[MAP_PALETTE_NIGHT]
							.palette->palette,
						pal) == NULL) {
					warn("Failed to cycle palettes");
				}
				if (!SDL_SetPalette(vp->screen, SDL_LOGPAL,
							pal->colors,
							0, pal->ncolors)) {
					warn("Failed to set palette");
				}
				SDL_Flip(vp->screen);
				SDL_Delay(10);
			}
			debug("Day %d night", d);
			/* night -> morn */
			for (; t < 1440; t += 1) {
				if (cycle_palettes_cosine(t, 360,
						map->palettes[MAP_PALETTE_NIGHT]
							.palette->palette,
						map->palettes[MAP_PALETTE_MORN]
							.palette->palette,
						pal) == NULL) {
					warn("Failed to cycle palettes");
				}
				if (!SDL_SetPalette(vp->screen, SDL_LOGPAL,
							pal->colors,
							0, pal->ncolors)) {
					warn("Failed to set palette");
				}
				SDL_Flip(vp->screen);
				SDL_Delay(10);
			}
		}
	}
	quit(0);

	/* Demo */
	pal = map->palettes[MAP_PALETTE_DAY].palette->palette;
	if (!SDL_SetPalette(vp->screen, SDL_LOGPAL, pal->colors,
				0, pal->ncolors)) {
		warn("Failed to set palette");
	}

	{
		Uint32 start, end;
		int x, y;

		i = 0;
		start = SDL_GetTicks();
		x = 19 * map->tilewidth ;
		y = 38 * map->tileheight;
		for (; y > 34 * map->tileheight; y -= 2) DEMO(); /* Up */
		for (; x < 23 * map->tilewidth ; x += 2) DEMO(); /* Right */
		for (; y > 16 * map->tileheight; y -= 2) DEMO(); /* Up */
		for (; x > 15 * map->tilewidth ; x -= 2) DEMO(); /* Left */
		for (; y < 25 * map->tileheight; y += 2) DEMO(); /* Down */
		for (; x >  4 * map->tilewidth ; x -= 2) DEMO(); /* Left */
		for (; y > 18 * map->tileheight; y -= 2) DEMO(); /* Up */
		for (; x <  9 * map->tilewidth ; x += 2) DEMO(); /* Right */
		for (; y >  5 * map->tileheight; y -= 2) DEMO(); /* Up */
		for (; x < 15 * map->tilewidth ; x += 2) DEMO(); /* Right */
		for (; y >  1 * map->tileheight; y -= 2) DEMO(); /* Up */
		end = SDL_GetTicks();
		debug("Rendered %d frames in %d milliseconds", i, end - start);
	}

	quit(0);

	/* Control doesn't actually reach here. */
	return 0;
}