extends Spatial

var play = false

onready var engine = $Engine

export var tileSize = 40
export var blackColor = Color.black
export var whiteColor = Color.white
const tileCount = 8

export var selectionColor = Color.white

var tiles = []
var pieceTiles = []

var selectionTile = null
var selX = 0
var selZ = 0

var selectedIndex = -1
var inverse = -1

var bishop = preload("res://Minigames/Chess/pieces/bishop.png")
var king = preload("res://Minigames/Chess/pieces/king.png")
var pawn = preload("res://Minigames/Chess/pieces/pawn.png")
var queen = preload("res://Minigames/Chess/pieces/queen.png")
var rook = preload("res://Minigames/Chess/pieces/rook.png")
var knight = preload("res://Minigames/Chess/pieces/knight.png")

var pieceIconDict = {'r': rook, 'n': knight, 'b': bishop, 'q': queen,
'k': king, 'p': pawn, '.': null}

func _ready():
	var vp = $Viewport
	engine.setup()
	for z in range(0,tileCount):
		for x in range(0,tileCount):
			var cr = ColorRect.new()
			
			var val = x+z
			
			if val % 2 == 0:
				cr.color = blackColor
			else:
				cr.color = whiteColor
			
			cr.margin_right = tileSize
			cr.margin_bottom = tileSize
			cr.rect_position.x = x * tileSize
			cr.rect_position.y = z * tileSize
			
			vp.add_child(cr)
			tiles.append(cr)
			
			var piece = TextureRect.new()
			piece.margin_right = tileSize
			piece.margin_bottom = tileSize
			piece.rect_position.x = x * tileSize
			piece.rect_position.y = z * tileSize
			piece.expand = true
			vp.add_child(piece)
			pieceTiles.append(piece)
			
	selectionTile = ColorRect.new()
	selectionTile.color = selectionColor
	selectionTile.margin_right = tileSize
	selectionTile.margin_bottom = tileSize
	selectionTile.rect_position.x = selX * tileSize
	selectionTile.rect_position.y = (7-selZ) * tileSize
	selectionTile.visible = false
	vp.add_child(selectionTile)
	
	#drawPieces()
	
func play():
	play = true
	selectionTile.visible = true
	Spiel.player.lock = true
	drawPieces()

func _process(_delta):
	if not play:
		return

	if engine.isdraw():
		playerDraw()

	if engine.isaiturn():
		if not engine.aimove():
			playerLost()
		drawPieces()
		return
		
	if Input.is_action_just_pressed("jump"):
		selectPiece()
		drawPieces()
	if Input.is_action_just_pressed("ui_up"):
		selZ = selZ + 1
	elif Input.is_action_just_pressed("ui_down"):
		selZ = selZ - 1
	if Input.is_action_just_pressed("ui_left"):
		selX = selX - 1
	elif Input.is_action_just_pressed("ui_right"):
		selX = selX + 1

	selX = posmod(selX, 8)
	selZ = posmod(selZ, 8)

	selectionTile.rect_position.x = selX * tileSize
	selectionTile.rect_position.y = (7-selZ) * tileSize

func selectPiece():
	if selectedIndex == -1:
		selectedIndex = selX + selZ * 8
		inverse = selX + (7-selZ) * 8
		return
	
	if not engine.makemove(selectedIndex, selX + selZ * 8):
		playerWon()
	
	selectedIndex = -1
	inverse = -1

func drawPieces():
	var pieces = engine.getboard()
	var i = 0
	for c in pieces:
		var p = c.to_lower()
		if p == ' ' or p == '\n':
			continue
		
		pieceTiles[i].texture = pieceIconDict[p]
		if i == inverse:
			pieceTiles[i].modulate = Color.red
		elif c != p:
			pieceTiles[i].modulate = Color.cyan
		else:
			pieceTiles[i].modulate = Color.white

		i = i + 1

func playerWon():
	play = false
	selectionTile.visible = false
	Spiel.player.lock = false
	
	var dialog = Dialogic.start("rat_chess_end")
	dialog.connect("dialogic_signal", self, "dialog_listener")
	add_child(dialog)

func playerLost():
	engine.setup()
	
func playerDraw():
	playerLost()