extends Panel

onready var brush_settings = $BrushSettings
onready var label_brush_size = brush_settings.get_node(@"LabelBrushSize")
onready var label_brush_shape = brush_settings.get_node(@"LabelBrushShape")
onready var label_stats = $LabelStats
onready var label_tools = $LabelTools

onready var _parent = get_parent()
onready var save_dialog = _parent.get_node(@"SaveFileDialog")
onready var paint_control = _parent.get_node(@"PaintControl")

func _ready():
	# warning-ignore-all:return_value_discarded
	# Assign all of the needed signals for the oppersation buttons.
	$ButtonUndo.connect("pressed", self, "button_pressed", ["undo_stroke"])
	$ButtonSave.connect("pressed", self, "button_pressed", ["save_picture"])
	$ButtonClear.connect("pressed", self, "button_pressed", ["clear_picture"])

	# Assign all of the needed signals for the brush buttons.
	$ButtonToolPencil.connect("pressed", self, "button_pressed", ["mode_pencil"])
	$ButtonToolEraser.connect("pressed", self, "button_pressed", ["mode_eraser"])
	$ButtonToolRectangle.connect("pressed", self, "button_pressed", ["mode_rectangle"])
	$ButtonToolCircle.connect("pressed", self, "button_pressed", ["mode_circle"])
	$BrushSettings/ButtonShapeBox.connect("pressed", self, "button_pressed", ["shape_rectangle"])
	$BrushSettings/ButtonShapeCircle.connect("pressed", self, "button_pressed", ["shape_circle"])

	# Assign all of the needed signals for the other brush settings (and ColorPickerBackground).
	$ColorPickerBrush.connect("color_changed", self, "brush_color_changed")
	$ColorPickerBackground.connect("color_changed", self, "background_color_changed")
	$BrushSettings/HScrollBarBrushSize.connect("value_changed", self, "brush_size_changed")

	# Assign the "file_selected" signal in SaveFileDialog.
	save_dialog.connect("file_selected", self, "save_file_selected")

	# Set physics process so we can update the status label.
	set_physics_process(true)


func _physics_process(_delta):
	# Update the status label with the newest brush element count.
	label_stats.text = "Brush objects: " + String(paint_control.brush_data_list.size())


func button_pressed(button_name):
	# If a brush mode button is pressed.
	var tool_name = null
	var shape_name = null
	
	if button_name == "mode_pencil":
		paint_control.brush_mode = paint_control.BrushModes.PENCIL
		brush_settings.modulate = Color(1, 1, 1, 1)
		tool_name = "Pencil"
	elif button_name == "mode_eraser":
		paint_control.brush_mode = paint_control.BrushModes.ERASER
		brush_settings.modulate = Color(1, 1, 1, 1)
		tool_name = "Eraser"
	elif button_name == "mode_rectangle":
		paint_control.brush_mode = paint_control.BrushModes.RECTANGLE_SHAPE
		brush_settings.modulate = Color(1, 1, 1, 0.5)
		tool_name = "Rectangle shape"
	elif button_name == "mode_circle":
		paint_control.brush_mode = paint_control.BrushModes.CIRCLE_SHAPE
		brush_settings.modulate = Color(1, 1, 1, 0.5)
		tool_name = "Circle shape"

	# If a brush shape button is pressed
	elif button_name == "shape_rectangle":
		paint_control.brush_shape = paint_control.BrushShapes.RECTANGLE
		shape_name = "Rectangle"
	elif button_name == "shape_circle":
		paint_control.brush_shape = paint_control.BrushShapes.CIRCLE
		shape_name = "Circle";

	# If a opperation button is pressed
	elif button_name == "clear_picture":
		paint_control.brush_data_list = []
		paint_control.update()
	elif button_name == "save_picture":
		save_dialog.popup_centered()
	elif button_name == "undo_stroke":
		paint_control.undo_stroke()
	
	# Update the labels (in case the brush mode or brush shape has changed).
	if tool_name != null:
		label_tools.text = "Selected tool: " + tool_name
	if shape_name != null:
		label_brush_shape.text = "Brush shape: " + shape_name


func brush_color_changed(color):
	# Change the brush color to whatever color the color picker is.
	paint_control.brush_color = color


func background_color_changed(color):
	# Change the background color to whatever colorthe background color picker is.
	get_parent().get_node("DrawingAreaBG").modulate = color
	paint_control.bg_color = color
	# Because of how the eraser works we also need to redraw the paint control.
	paint_control.update()


func brush_size_changed(value):
	# Change the size of the brush, and update the label to reflect the new value.
	paint_control.brush_size = ceil(value)
	label_brush_size.text = "Brush size: " + String(ceil(value)) + "px"


func save_file_selected(path):
	# Call save_picture in paint_control, passing in the path we recieved from SaveFileDialog.
	paint_control.save_picture(path)