extends TileMap

@export var ground_tile_source_id = 0
@export var wall_tile_source_id = 1
@export var destination_tile_source_id = 2
@export var target_tile_source_id = 3
@export var ground_left_tile_source_id = 4
@export var ground_right_tile_source_id = 5
@export var ground_bottom_tile_source_id = 6
@export var ground_left_bottom_tile_source_id = 7
@export var ground_right_bottom_tile_source_id = 8
@export var map_width = 13 # keep to a odd value
@export var map_height = 19 # keep to a odd value
# Debug variables
var current_destination_cell: Vector2i
var current_target_cell: Vector2i

# The tilemap is divided in two areas separated by a wall
# One for the player (bottom area)
# One for the enemy (top area)

func _ready():
	draw_map()

func draw_map():
	draw_ground()
	draw_wall()

func draw_ground():
	var tile_source_id = ground_tile_source_id
	var height = get_bottom_area_height()
	for x in range(map_width):
		for y in range(map_height):
			if x == 0 && y == map_height - 1:
				tile_source_id = ground_left_bottom_tile_source_id
			elif x == map_width - 1 && y == map_height - 1:
				tile_source_id = ground_right_bottom_tile_source_id
			elif x == 0 && y >= height.x:
				tile_source_id = ground_left_tile_source_id
			elif x == map_width - 1 && y >= height.x:
				tile_source_id = ground_right_tile_source_id
			elif y == height.y:
				tile_source_id = ground_bottom_tile_source_id
			else:
				tile_source_id = ground_tile_source_id
			set_cell(0, Vector2i(x, y), tile_source_id, Vector2i(0, 0), 0)

func draw_wall():
	var middle_height = floor(map_height / 2.0)
	for x in range(map_width):
		set_cell(1, Vector2i(x - 1, middle_height - 1), wall_tile_source_id, Vector2i(0, 0), 0) # why have we to add -1?

func get_top_spawn_cell() -> Vector2i:
	return Vector2i(floor(map_width / 2.0), 1)

func get_bottom_spawn_cell() -> Vector2i:
	return Vector2i(floor(map_width / 2.0), map_height - 2)

func get_random_top_cell() -> Vector2i:
	var w = get_area_width()
	var h = get_top_area_height()
	
	return Vector2i(randi_range(w.x, w.y), randi_range(h.x, h.y))

func get_random_bottom_cell() -> Vector2i:
	var w = get_area_width()
	var h = get_bottom_area_height()
	
	return Vector2i(randi_range(w.x, w.y), randi_range(h.x, h.y))

func is_in_bottom_area(cell: Vector2i) -> bool:
	var height = get_bottom_area_height()
	return cell.y >= height.x && cell.y <= height.y

func get_area_width() -> Vector2i:
	return Vector2i(0, map_width - 1)

func get_top_area_height() -> Vector2i:
	var middle_height = floor(map_height / 2.0)
	return Vector2i(0, middle_height - 1)

func get_bottom_area_height() -> Vector2i:
	var middle_height = floor(map_height / 2.0)
	return Vector2i(middle_height + 1, map_height - 1)

# Debug functions
func reset_and_set_target_cell(cell: Vector2i):
	reset_and_set_cell(current_target_cell, cell, target_tile_source_id)

func reset_and_set_destination_cell(cell: Vector2i):
	reset_and_set_cell(current_destination_cell, cell, destination_tile_source_id)

func reset_and_set_cell(current_cell: Vector2i, cell: Vector2i, tile_source_id: int):
	if current_cell != null:
		set_cell(0, current_cell, ground_tile_source_id, Vector2i(0, 0), 0)
	set_cell(0, cell, tile_source_id, Vector2i(0, 0), 0)
	current_cell = cell