#include "movement.h"
#include "enemy.h"
#include "map/map.h"
#include "map/utils.h"
#include <stdbool.h>

// Check if position is occupied by player
static int is_player_at(Player *p, int x, int y) {
  return (p->position.x == x && p->position.y == y);
}

static int direction_to_door_open_from(Vec2 dir) {
  if (dir.y == -1)
    return 0;  // N
  if (dir.y == 1)
    return 1;  // S
  if (dir.x == 1)
    return 2;  // E
  if (dir.x == -1)
    return 3;  // W
  return 255;
}

MoveResult try_move_entity(Vec2 *p, Vec2 direction, Map *map, Player *player, Enemy *enemies, int enemy_count,
                           bool moving_is_player) {
  int new_x = p->x + direction.x;
  int new_y = p->y + direction.y;

  if (!in_bounds(new_x, new_y, MAP_WIDTH, MAP_HEIGHT))
    return MOVE_RESULT_BLOCKED_WALL;

  if (map->tiles[new_y][new_x] == TILE_DOOR_CLOSED) {
    map->tiles[new_y][new_x] = TILE_DOOR_OPEN;
    map->door_open_from[new_y][new_x] = direction_to_door_open_from(direction);
    map->door_anim_target[new_y][new_x] = 1;
    map->door_anim_timer[new_y][new_x] = DOOR_ANIM_FRAMES;
  }

  if (!is_floor(map, new_x, new_y))
    return MOVE_RESULT_BLOCKED_WALL;

  if (is_enemy_at(enemies, enemy_count, new_x, new_y))
    return MOVE_RESULT_BLOCKED_ENEMY;
  if (!moving_is_player) {
    if (is_player_at(player, new_x, new_y))
      return MOVE_RESULT_BLOCKED_PLAYER;
  }

  p->x = new_x;
  p->y = new_y;
  return MOVE_RESULT_MOVED;
}