extends TileMap

@export var ground_tile_source_id = 0
@export var destination_tile_source_id = 2
@export var target_tile_source_id = 3
@export var map_width = 13 # keep to a odd value
@export var map_height = 19 # keep to a odd value
var current_destination_cell: Vector2i
var current_target_cell: Vector2i

func _ready():
	draw_map()
	
func draw_map():
	draw_ground()
	draw_separation()
	get_random_top_cell()

func draw_ground():
	for x in range(map_width):
		for y in range(map_height):
			set_cell(0, Vector2i(x, y), 0, Vector2i(0, 0), 0)

# The tilemap is initially divided in two section
# One for the player (bottom section)
# One for the enemy (top section)
func draw_separation():
	var middle_height = floor(map_height / 2.0)
	for x in range(map_width):
		set_cell(1, Vector2i(x - 1, middle_height - 1), 1, 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 middle_height = floor(map_height / 2.0)
	var rand_width = randi_range(0, map_width - 1)
	var rand_height = randi_range(0, middle_height - 1)
	
	return Vector2i(rand_width, rand_height)

func get_random_bottom_cell() -> Vector2i:
	var middle_height = floor(map_height / 2.0)
	var rand_width = randi_range(0, map_width - 1)
	var rand_height = randi_range(middle_height + 1, map_height - 1)
	
	return Vector2i(rand_width, rand_height)

func is_in_bottom_area(local_position: Vector2) -> bool:
	var map_position = local_to_map(local_position)
	
	var middle_height = floor(map_height / 2.0)
	var bottom_min_height = middle_height + 1
	var bottom_max_height = map_height - 1
	
	return map_position.y >= bottom_min_height && map_position.y <= map_height


# Debug helper 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