/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   map.c                                              :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: cchauvet <cchauvet@student.42angouleme.fr  +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/01/05 13:51:49 by cchauvet          #+#    #+#             */
/*   Updated: 2023/01/08 14:48:51 by cchauvet         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "solong.h"

char	**ft_readfile(char *path)
{
	char	**map;
	int		fd;
	size_t	nb_line;

	fd = open(path, O_RDONLY);
	nb_line = 1;
	map = malloc(sizeof(char *) * 2);
	if (map == NULL)
		return (NULL);
	map[0] = get_next_line(fd);
	while (map[nb_line - 1] != NULL)
	{
		ft_strchr(map[nb_line - 1], '\n')[0] = '\0';
		map[nb_line] = get_next_line(fd);
		map = ft_tabrealloc(map, nb_line + 1, nb_line + 2);
		if (map == NULL)
			return (NULL);
		nb_line++;
	}
	return (map);
}

t_map	*ft_getmap(char *path)
{
	t_map	*map;

	map = malloc(sizeof(t_map));
	if (map == NULL)
		return (NULL);
	map->exit[2] = 0;
	map->player_pos[2] = 0;
	map->patern = ft_readfile(path);
	if (ft_map_is_correct(map) == 0)
		return (NULL);
	return (map);
}

static char	*ft_get_line(const char *line, size_t player_x)
{
	char	*out;
	size_t	start;
	size_t	stop;
	size_t	temp;
	size_t	i;

	temp = ft_strlen(line);
	if (player_x + RENDER_DISTANCE > temp)
		stop = temp;
	else
		stop = player_x + RENDER_DISTANCE;
	if (player_x < RENDER_DISTANCE + 1)
		start = RENDER_DISTANCE - player_x;
	else
		start = player_x - RENDER_DISTANCE;
	if (RENDER_DISTANCE > player_x)
		temp = 0;
	else
		temp = player_x - RENDER_DISTANCE;
	out = ft_strgen('0', RENDER_DISTANCE * 2 + 1);
	if (out == NULL)
		return (NULL);
	i = 0;
	while (i < stop + 1)
	{
		out[start + i] = line[temp + i];
		i++;
	}
	return (out);
}

char	**ft_get_player_map(t_map map)
{
	char	**player_map;
	size_t	y;
	size_t	i;

	player_map = malloc(RENDER_DISTANCE * 2 + 2);
	if (player_map == NULL)
		return (NULL);
	i = 0;
	y = 0;
	while (y < RENDER_DISTANCE * 2 + 1)
	{
		player_map[y] = ft_strgen('0', RENDER_DISTANCE * 2 + 1);
		if (map.player_pos[1] + y >= RENDER_DISTANCE && map.patern[i] != NULL)
		{
			player_map[y] = ft_get_line(map.patern[i], map.player_pos[0]);
			i++;
		}
		if (player_map[y] == NULL)
		{
			ft_cancel(player_map, y);
			return (NULL);
		}
		y++;
	}
	player_map[y] = NULL;
	return (player_map);
}