extends Node2D

var current_player: int = 0
var player_states := ["Circle", "Cross"]
var won := ""

@onready var board := $Board as Board
@onready var nextPlayer := $GUI/NextPlayer as Sprite2D
@onready var wonPlayer := $GUI/WonPlayer as Sprite2D

# Called when the node enters the scene tree for the first time.
func _ready():
	current_player = 0
	board.reset()
	won = ""
	wonPlayer.hide()
	nextPlayer.region_rect.position.x = current_player * 300
	nextPlayer.show()
	board.active = true


# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(_delta):
	if won == "":
		if Input.is_action_just_pressed("Click"):
			var grid_pos = board.gridpos_at_mouse()
			if board.get_state(grid_pos) == board.empty_state:
				var new_pos = board._calculate_drop_pos(grid_pos)
				if board.set_state(new_pos, player_states[current_player]):
					won = _check_win()
					if won=="":
						current_player = 1 - current_player
						nextPlayer.region_rect.position.x = current_player * 300
					else:
						print("Winner: ", won)
						wonPlayer.region_rect.position.x = player_states.find(won) * 300
						wonPlayer.show()
						nextPlayer.hide()
						board.active = false
						

func _on_restart_button_pressed():
	_ready()

var _checks = [
	[Vector2i(-1,0), Vector2i(1,0)],
	[Vector2i(0,-1), Vector2i(0,1)],      
	[Vector2i(-1,-1), Vector2i(1,1)],     
	[Vector2i(-1,1), Vector2i(1,-1)],
]

				
func _check_win() -> String:
	for cell in board.get_used_cells(board.layer_by_name[board.state_layer]):
		var state = board.get_state(cell)
		for check in _checks:
			for i in range(3):
				var same = true
				for j in range(4):
					if board.get_state(cell + check[0] * (i + j)) != state:
						same = false
						break
				if same:
					return state
	return ""