extends Node2D

const TILE_SIZE = 120
const BOARD_SIZE = 8

var board_size : int
var cell_size : int
var grid_pos : Vector2i 
var grid_data : Array # matrice 8 pe 8

@onready var white_pawn_scene = preload("res://White_Pawn.tscn")
var selected_piece = null



func _ready():
	draw_board()
	setup_pieces()
	setup_tile_areas()
		
	
func _draw():
	var white = Color(1, 1, 1)
	var black = Color(0, 0, 0)

	for row in range(BOARD_SIZE):
		for col in range(BOARD_SIZE):
			var color = white if (row + col) % 2 == 0 else black
			draw_rect(Rect2(col * TILE_SIZE, row * TILE_SIZE, TILE_SIZE, TILE_SIZE), color)

func draw_board():
	queue_redraw()  # Declanșează funcția _draw() pentru a desena tabla

func setup_pieces():
	# Instanțierea pionilor albi
	for i in range(BOARD_SIZE):
		var white_pawn = white_pawn_scene.instantiate()
		add_child(white_pawn)
		white_pawn.position = Vector2(i * TILE_SIZE + 60, 6 * TILE_SIZE + 60)  # Pionii albi încep pe rândul 6
	
func setup_tile_areas():
	for row in range(BOARD_SIZE):
		for col in range(BOARD_SIZE):
			var tile_area = Area2D.new()
			var collision_shape = CollisionShape2D.new()
			var shape = RectangleShape2D.new()
			shape.extents = Vector2(TILE_SIZE / 2, TILE_SIZE / 2)
			collision_shape.shape = shape
			tile_area.add_child(collision_shape)
			tile_area.position = Vector2(col * TILE_SIZE + TILE_SIZE / 2, row * TILE_SIZE + TILE_SIZE / 2)
			tile_area.set_meta("grid_position", Vector2(col, row))  # Setăm coordonatele grilei
			add_child(tile_area)
			tile_area.connect("input_event", Callable(self, "_on_tile_input_event"))

func _on_piece_input_event(viewport, event, shape_idx, piece):
	if event is InputEventMouseButton and event.pressed:
		if event.button_index == MOUSE_BUTTON_LEFT:
			if selected_piece == null:
				selected_piece = piece
				print("Pion selectat la: ", selected_piece.position)
			else:
				print("Click pe pion, selectează o casuță pentru a muta pionul.")

func _on_tile_input_event(viewport, event, shape_idx):
	if event is InputEventMouseButton and event.pressed:
		if event.button_index == MOUSE_BUTTON_LEFT:
			var tile_area = pick_nearest_tile(event.position)
			if tile_area != null:
				var grid_position = tile_area.get_meta("grid_position")  # Obține coordonatele grilei
				if selected_piece != null:
					if move_piece(selected_piece, grid_position):
						print("Pion mutat la: ", grid_to_position(grid_position))
					else:
						print("Mutare invalidă")
					selected_piece = null

func pick_nearest_tile(screen_position):
	var row = int(screen_position.y / TILE_SIZE)
	var col = int(screen_position.x / TILE_SIZE)
	var tile_area = null
	for child in get_children():
		if child is Area2D and child.get_meta("grid_position", null) == Vector2(col, row):
			tile_area = child
			break
	return tile_area

func move_piece(piece, grid_position):
	if piece.type == "pawn" and piece.color == "white":
		var current_grid_position = position_to_grid(piece.position)
		if is_valid_pawn_move(current_grid_position, grid_position):
			piece.position = grid_to_position(grid_position)
			return true
	return false

func is_valid_pawn_move(current_position, target_position):
	if target_position.x == current_position.x:
		if target_position.y == current_position.y - 1:
			return true  # Mutare cu un pătrat înainte
		if current_position.y == 6 and target_position.y == current_position.y - 2:
			return true  # Mutare cu două pătrate înainte din poziția inițială
	return false

func grid_to_position(grid_position):
	return grid_position * TILE_SIZE + Vector2(60,60)

func position_to_grid(screen_position):
	return Vector2(floor(screen_position.x / TILE_SIZE), floor(screen_position.y / TILE_SIZE))