#include "render.h"

#include <stdlib.h>
#include <raylib.h>

static Texture2D render_texture [render_texture_count];

static Font    font = { 0 };
static Color   tint = { 255, 255, 255, 255 };
static Vector2 dump = { 0, 0 };

static void (* render_action [80]) (void);

static void render_clean_up (void) {
	CloseWindow ();
}

static void render_exit (void) {
	engine_active = 0;
}

float render_zoom   = 2.0;
int   engine_active = 0;

int signal = signal_none;

int window_width  (void) { return (GetScreenWidth  ()); }
int window_height (void) { return (GetScreenHeight ()); }

void render_sprite (int sprite, int x, int y, int u, int v, int width, int height) {
	Rectangle source, destination;

	source.x      = u;
	source.y      = v;
	source.width  = width;
	source.height = height;

	destination.x      = x;
	destination.y      = y;
	destination.width  = width  * ((sprite <= icons) ? 1 : render_zoom);
	destination.height = height * ((sprite <= icons) ? 1 : render_zoom);

	DrawTexturePro (render_texture [sprite], source, destination, dump, 0.0, tint);
}

void render_string (char * string, int x, int y) {
	Vector2 position = { 4, 4 };

	position.x += x;
	position.y += y;

	DrawTextPro (font, string, position, dump, 0.0, FONT_SIZE, 4, tint);
}

void engine_configure (void) {
	engine_active = 1;

	InitWindow   (1800, 900, "EAX");
	SetTargetFPS (60);

	font = LoadFont ("sprite/gothic.ttf");

	atexit (render_clean_up);

	render_action [0] = render_exit;

	render_texture [menus] = LoadTexture ("sprite/menus.png");
	render_texture [icons] = LoadTexture ("sprite/icons.png");

	SetTextureFilter (render_texture [menus], TEXTURE_FILTER_POINT);
	SetTextureFilter (render_texture [icons], TEXTURE_FILTER_POINT);

	render_texture [orcs]     = LoadTexture ("sprite/orcs.png"); /* TODO */
	/*render_texture [humans]   = LoadTexture ("sprite/humans.png");
	render_texture [elves]    = LoadTexture ("sprite/elves.png");*/
	render_texture [ashlands] = LoadTexture ("sprite/ashlands.png");
}

void engine_synchronize (void) {
	Color background = { 0, 0, 0, 0 };

	EndDrawing ();

	if (WindowShouldClose ()) { engine_active = 0; }

	signal = GetKeyPressed ();

	switch (signal) {
		case KEY_UP:     signal = signal_up;     break;
		case KEY_DOWN:   signal = signal_down;   break;
		case KEY_LEFT:   signal = signal_left;   break;
		case KEY_RIGHT:  signal = signal_right;  break;
		case KEY_ESCAPE: signal = signal_escape; break;
		case KEY_R:      signal = signal_r;      break;
		case KEY_T:      signal = signal_t;      break;
		case KEY_S:      signal = signal_s;      break;
		case KEY_V:      signal = signal_v;      break;
		default:         signal = signal_none;   break;
	}

	BeginDrawing ();

	ClearBackground (background);
}