extends Node2D

const fadeTime = 3.0

const zoomStart = 1.0
const zoomEnd = 0.97
const bloodStart = 0.2
const bloodEnd = 0.9
const timeParam = 1.7

var isDead
var bloodIncrement
var zoomIncrement
var currentZoom
var currentEnergy
var isIncreasing
var screenWidth;
var screenHeight;
var xOffset;
var yOffset

func _ready():
	if not get_tree().root.has_node("Root"):
		return ;
	
	GallerySingleton.AddImage("Death_knife")
	
	var dialogicNode = get_parent().get_parent().get_node("Game").get_child(0).get_child(0)
	dialogicNode.connect("dialogic_signal", self, "_frame_switch_listener")
	
	
	isDead = false
	dialogicNode.connect("dialogic_signal", self, "_begin_death")
	bloodIncrement = (bloodEnd - bloodStart) / timeParam;
	zoomIncrement = (zoomEnd - zoomStart) / timeParam;
	currentZoom = zoomStart
	isIncreasing = true
	currentEnergy = 0
	screenWidth = SettingsSingleton.GetCurrectScreenResolutionVector2().x
	screenHeight = SettingsSingleton.GetCurrectScreenResolutionVector2().y
	
func InitScene(saveSlot:int):
	pass
	
func _frame_switch_listener(string):
	match string:
		"sprite2":
			
			
			$frame3.self_modulate.a = 0
			$frame3.visible = true
			var tween = $"Tween"
			tween.interpolate_method(self, "frame3Interpolate", 0, 1, fadeTime, Tween.TRANS_LINEAR, 0)
			tween.start()
		"death":
			
			$frame1.visible = false
			var tween = $"Tween"
			tween.interpolate_method(self, "frame3Interpolate", 1, 0, fadeTime, Tween.TRANS_LINEAR, 0)
			tween.interpolate_property($Sprite3, "modulate", Color(1, 1, 1, 1), Color.black, fadeTime, Tween.TRANS_LINEAR, 0)
			tween.start()

func _process(delta):
	if (isDead):
		if (isIncreasing):
			if (currentEnergy <= bloodEnd):
				
				currentEnergy += bloodIncrement * delta
				currentZoom += zoomIncrement * delta
				$death / Light2D.self_modulate.a = currentEnergy
				xOffset = (1 - currentZoom) * ($death / Polygon2D.get_global_transform_with_canvas().origin.x) / (screenWidth);
				print(xOffset)
				yOffset = (1 - currentZoom) * (screenHeight - $death / Polygon2D.get_global_transform_with_canvas().origin.y) / screenHeight;
				var offset = Vector2(xOffset, yOffset);
				var tiling = Vector2(currentZoom, currentZoom)
				$death / Polygon2D.material.set_shader_param("offset", offset)
				$death / Polygon2D.material.set_shader_param("tiling", tiling);
			else :
				isIncreasing = false
		if ( not isIncreasing):
			if (currentEnergy >= bloodStart):
				
				currentEnergy -= bloodIncrement * delta
				currentZoom -= zoomIncrement * delta
				$death / Light2D.self_modulate.a = currentEnergy
				xOffset = (1 - currentZoom) * ($death / Polygon2D.get_global_transform_with_canvas().origin.x) / (screenWidth);
				yOffset = (1 - currentZoom) * (screenHeight - $death / Polygon2D.get_global_transform_with_canvas().origin.y) / screenHeight;
				var offset = Vector2(xOffset, yOffset);
				$death / Polygon2D.material.set_shader_param("offset", offset)
				$death / Polygon2D.material.set_shader_param("tiling", Vector2(currentZoom, currentZoom));
			else :
				isIncreasing = true
	else :pass
	
func _begin_death(string):
	match string:
		"death2":
			$death.visible = true;
			var tween = $death.get_child(0).get_child(0)
			var light = $death.get_child(0)
			tween.interpolate_method(self, "bloodInterpolate", 0.0, bloodStart, 1.0, Tween.TRANS_LINEAR, 0);
			tween.start()
			yield ($death.get_child(0).get_child(0), "tween_all_completed")
			currentEnergy = bloodStart
			$death.get_child(0).self_modulate.a = bloodStart
			isDead = true;

func bloodInterpolate(value):
	$death / Light2D.self_modulate.a = value;
		
func frame3Interpolate(value):
	$frame3.self_modulate.a = value

func InitForGallery()->Array:
	$frame1.visible = true;
	$frame2.visible = false;
	$frame3.visible = false;
	scale = Vector2(0.5, 0.5)
	
	return ["ui_gallery_fall_1", "ui_gallery_fall_2", "ui_gallery_fall_3"];

func SetSettings(setting):
	if setting == tr("ui_gallery_fall_1"):
		$frame1.visible = true;
		$frame2.visible = false;
		$frame3.visible = false;
	elif setting == tr("ui_gallery_fall_2"):
		$frame1.visible = false;
		$frame2.visible = true;
		$frame3.visible = false;
	elif setting == tr("ui_gallery_fall_3"):
		$frame1.visible = false;
		$frame2.visible = false;
		$frame3.visible = true;