#include "cube3d.h"

static void	init_img(t_img *img, void *mlx_ptr, t_win *win)
{
	img->ptr = mlx_new_image(mlx_ptr, win->size_x, win->size_y);
	img->data = mlx_get_data_addr(img->ptr, &img->bpp, &img->szl, &img->ndn);
	img->height = win->size_y;
}

static void	init_map(t_map *map)
{
	map->content = NULL;
	map->tmp_str = NULL;
	map->cell = CELL;
	map->size_x = 0;
	map->size_y = 0;
	map->plr_x = 0;
	map->plr_y = 0;
}

static void	init_txt(t_txt *txt)
{
	txt->txt_north = NULL;
	txt->txt_south = NULL;
	txt->txt_east = NULL;
	txt->txt_west = NULL;
}

static void	init_raycast(t_rcast *rcast)
{
	double	dist;

	dist = (SCREEN_FOCAL / 2) * M_PI / 180;
	dist = cos(dist) * ((SCREEN_WIDTH / 2) / sin(dist));
	rcast->screen_dist = dist;
	rcast->screen_width = SCREEN_WIDTH;
	rcast->screen_height = SCREEN_HEIGHT;
	// screen size
	rcast->screen_size.start.x = -SCREEN_WIDTH / 2;
	rcast->screen_size.start.y = -dist;
	rcast->screen_size.end.x = SCREEN_WIDTH / 2;
	rcast->screen_size.end.y = -dist;
	// first ray
	rcast->ray.start.x = 0;
	rcast->ray.start.y = 0;
	rcast->ray.end.x = -SCREEN_WIDTH / 2;
	rcast->ray.end.y = -dist;
}

void	init_plr(t_plr *plr, t_map *map)
{
	// player first position
	plr->exact.x = map->plr_x * CELL + CELL / 2;
	plr->exact.y = map->plr_y * CELL + CELL / 2;
	plr->pos.x = plr->exact.x;
	plr->pos.y = plr->exact.y;
	// rotation
	plr->deg = PLR_ROT;
	plr->rot = 0;
	plr->cosi = 0;
	plr->cosj = 0;
	plr->sini = 0;
	plr->sinj = 0;
}

t_game	*init_struct(void)
{
	t_game	*game;

	game = mb_alloc(sizeof(t_game));
	// map
	init_map(&(game->map));
	// init textures and floor/ceiling colors
	init_txt(&(game->txt));
	return (game);
}

void	init_game(t_game *game)
{
	// plr
	init_plr(&(game->plr), &(game->map));
	// init connexion to server
	game->mlx_ptr = mlx_init();
	mb_add(game->mlx_ptr);
	// reate window
	game->win.size_x = SCREEN_WIDTH;
	game->win.size_y = SCREEN_HEIGHT;
	game->win.ptr = mlx_new_window(game->mlx_ptr, game->win.size_x, game->win.size_y, "cub3d");
	// create img
	init_img(&(game->img), game->mlx_ptr, &(game->win));
	// k(ey)_hook is the array containing the values of key press events
	ft_bzero(&game->k_hook, sizeof(game->k_hook));
	// raycasting
	init_raycast(&(game->rcast));
	game->rcast.cell = game->map.cell;
}