extends Node2D

var tiles = {}
var offset = Vector2.ZERO
var center_coord = Vector2.ZERO
var center_world_coord = Vector2.ZERO
var tile_local_coords = []
var rect_world = Rect2()
var radius_world = 0.0

# Called when the node enters the scene tree for the first time.
func _ready():
	pass # Replace with function body.


func set_tile(coord: Vector2, value: String):
	if HexTileDrawer.TileTypeFromString[value] == HexTileDrawer.TileType.None:
		if coord in tiles.keys():
			tiles.erase(coord)
	else:
		tiles[coord] = value
	
	update()


func set_offset(value: Vector2):
	offset = value


func clear_island():
	tiles = {}
	update()


func calc_bbox():
	var coord_min = Vector2.ONE * 10000
	var coord_max = Vector2.ONE * -10000
	
	var coords = tiles.keys()
	for coord in coords:
		var local_coords = (coord)
		tile_local_coords.append(local_coords)
		if local_coords.x < coord_min.x:
			coord_min.x = local_coords.x
		if local_coords.y < coord_min.y:
			coord_min.y = local_coords.y

		if local_coords.x > coord_max.x:
			coord_max.x = local_coords.x
		if local_coords.y > coord_max.y:
			coord_max.y = local_coords.y
	
	var hex_half_size = Vector2.ONE * Globals.hex_size * 0.5
	rect_world = Rect2(coord_min - hex_half_size, coord_max - coord_min + hex_half_size * 2)
	center_world_coord = Globals.HexToWorld(Globals.WorldToHex(coord_min + 0.5 * (coord_max - coord_min)))
	radius_world = max(rect_world.size.x, rect_world.size.y) * 0.5


func save_island(path: String):
	var island_save_data = File.new()
	island_save_data.open(path, File.WRITE)
	island_save_data.store_line (to_json(tiles))
	island_save_data.close()


func load_island(path: String):
	var island_save_data = File.new()

	if !island_save_data.file_exists(path):
		clear_island()
		return
	
	island_save_data.open(path, File.READ)
		
	var data = parse_json(island_save_data.get_line())
	island_save_data.close()

	var data_keys = data.keys()
	tiles = {}
	var coord_regex = RegEx.new()
	coord_regex.compile("\\((?<tile_x>-?\\d+(.?\\d+)?), (?<tile_y>-?\\d+(.?\\d+)?)\\)")
	
	var reg_test_result = coord_regex.search("(0, 0)")
	assert(reg_test_result)

	reg_test_result = coord_regex.search("(123.124, 552.0)")
	assert(reg_test_result)

	for k in data_keys:
		var coords = Vector2.ZERO
		var regresult = coord_regex.search(k)
		if regresult:
#			print(regresult.get_string("tile_x"), "  -   ", regresult.get_string("tile_y"))
			coords = Vector2(float(regresult.get_string("tile_x")), float(regresult.get_string("tile_y")))
			tiles[coords] = data[k]

	name = path
	calc_bbox()
	update()


func check_overlap(other):
	var tile_offset = Globals.HexToWorld(offset)
	var other_offset = Globals.HexToWorld(other.offset)

	var rel_offset = other_offset - tile_offset
	var dist = rel_offset.length() - radius_world - other.radius_world
	
	return dist < 0


func _draw():
	var tile_offset = Globals.HexToWorld(offset)
	print (name, tile_offset)
	for coord in tiles.keys():
		draw_set_transform (coord + tile_offset, 0, Vector2.ONE)
		draw_polygon(HexTileDrawer.HexPoints, HexTileDrawer.get_tile_color(tiles[coord]))

	var transform = get_transform()
	draw_set_transform(transform.origin + tile_offset, transform.get_rotation(), transform.get_scale())

	draw_rect(rect_world, Color.red, false)
	draw_circle(center_world_coord, radius_world, Color.brown)	
	draw_circle(center_world_coord, 10, Color.red)
	
	var default_font = Control.new().get_font("font")
	draw_string(default_font, Vector2(0, 0), name)