#include <lua5.3/lua.h>
#include <lua5.3/lualib.h>
#include <lua5.3/lauxlib.h>
#include "lua_manual.c"

lua_State * engine_lua_state;
int engine_luaf_free(lua_State *L) {
	void * ptr = lua_touserdata(L,1);
	engine_free(ptr);
	return 0;
}

int engine_luaf_window_init(lua_State *L) {
	int width = luaL_checkinteger(L,1);
	int height = luaL_checkinteger(L,2);
	char * title = (char *)luaL_checkstring(L,3);
	engine_window_init(width,height,title);
	return 0;
}

int engine_luaf_window_present(lua_State *L) {
	engine_window_present();
	return 0;
}

int engine_luaf_surface_color_set(lua_State *L) {
	char r = luaL_checkinteger(L,1);
	char g = luaL_checkinteger(L,2);
	char b = luaL_checkinteger(L,3);
	char a = luaL_checkinteger(L,4);
	engine_surface_color_set(r,g,b,a);
	return 0;
}

int engine_luaf_surface_draw_pixel(lua_State *L) {
	int x = luaL_checkinteger(L,1);
	int y = luaL_checkinteger(L,2);
	engine_surface_draw_pixel(x,y);
	return 0;
}

int engine_luaf_time_get(lua_State *L) {
	long long outvar = engine_time_get();
	lua_pushinteger(L,outvar);
	return 1;
}

int engine_luaf_time_sleep(lua_State *L) {
	long long ms = luaL_checkinteger(L,1);
	engine_time_sleep(ms);
	return 0;
}

int engine_luaf_event_get(lua_State *L) {
	struct ENGINE_EVENT * outvar = engine_event_get();
	lua_pushlightuserdata(L,outvar);
	return 1;
}

int engine_luaf_texture_create(lua_State *L) {
	int width = luaL_checkinteger(L,1);
	int height = luaL_checkinteger(L,2);
	struct ENGINE_TEXTURE * outvar = engine_texture_create(width,height);
	lua_pushlightuserdata(L,outvar);
	return 1;
}

int engine_luaf_texture_color_set(lua_State *L) {
	char r = luaL_checkinteger(L,1);
	char g = luaL_checkinteger(L,2);
	char b = luaL_checkinteger(L,3);
	char a = luaL_checkinteger(L,4);
	engine_texture_color_set(r,g,b,a);
	return 0;
}

int engine_luaf_texture_draw_pixel(lua_State *L) {
	struct ENGINE_TEXTURE * texture = lua_touserdata(L,1);
	int x = luaL_checkinteger(L,2);
	int y = luaL_checkinteger(L,3);
	engine_texture_draw_pixel(texture,x,y);
	return 0;
}

int engine_luaf_texture_destroy(lua_State *L) {
	struct ENGINE_TEXTURE * texture = lua_touserdata(L,1);
	engine_texture_destroy(texture);
	return 0;
}

int engine_luaf_texture_render_2d(lua_State *L) {
	struct ENGINE_TEXTURE * texture = lua_touserdata(L,1);
	int sx = luaL_checkinteger(L,2);
	int sy = luaL_checkinteger(L,3);
	engine_texture_render_2d(texture,sx,sy);
	return 0;
}

int engine_luaf_texture_from_file(lua_State *L) {
	struct ENGINE_TEXTURE * texture = lua_touserdata(L,1);
	char * fpath = (char *)luaL_checkstring(L,2);
	engine_texture_from_file(texture,fpath);
	return 0;
}

void engine_lua_init() {
	engine_lua_state = luaL_newstate();
	luaL_openlibs(engine_lua_state);

	lua_pushcfunction(engine_lua_state,engine_luaf_free);
	lua_setglobal    (engine_lua_state,"engine_free");
	lua_pushcfunction(engine_lua_state,engine_luaf_window_init);
	lua_setglobal    (engine_lua_state,"engine_window_init");
	lua_pushcfunction(engine_lua_state,engine_luaf_window_present);
	lua_setglobal    (engine_lua_state,"engine_window_present");
	lua_pushcfunction(engine_lua_state,engine_luaf_surface_color_set);
	lua_setglobal    (engine_lua_state,"engine_surface_color_set");
	lua_pushcfunction(engine_lua_state,engine_luaf_surface_draw_pixel);
	lua_setglobal    (engine_lua_state,"engine_surface_draw_pixel");
	lua_pushcfunction(engine_lua_state,engine_luaf_time_get);
	lua_setglobal    (engine_lua_state,"engine_time_get");
	lua_pushcfunction(engine_lua_state,engine_luaf_time_sleep);
	lua_setglobal    (engine_lua_state,"engine_time_sleep");
	lua_pushcfunction(engine_lua_state,engine_luaf_event_get);
	lua_setglobal    (engine_lua_state,"engine_event_get");
	lua_pushcfunction(engine_lua_state,engine_luaf_texture_create);
	lua_setglobal    (engine_lua_state,"engine_texture_create");
	lua_pushcfunction(engine_lua_state,engine_luaf_texture_color_set);
	lua_setglobal    (engine_lua_state,"engine_texture_color_set");
	lua_pushcfunction(engine_lua_state,engine_luaf_texture_draw_pixel);
	lua_setglobal    (engine_lua_state,"engine_texture_draw_pixel");
	lua_pushcfunction(engine_lua_state,engine_luaf_texture_destroy);
	lua_setglobal    (engine_lua_state,"engine_texture_destroy");
	lua_pushcfunction(engine_lua_state,engine_luaf_texture_render_2d);
	lua_setglobal    (engine_lua_state,"engine_texture_render_2d");
	lua_pushcfunction(engine_lua_state,engine_luaf_texture_from_file);
	lua_setglobal    (engine_lua_state,"engine_texture_from_file");
	engine_lua_init_manual();
	luaL_loadfile(engine_lua_state,"assets/scripts/main.lua");
	lua_call(engine_lua_state,0,0);
}