@tool
extends CenterContainer

signal text_finished
signal finished
signal intro
signal emit_thunder

#TODO properly implement animation taking stage, as it should do, disabling processing when it does not have stage.

var max_lines: float = 0
@export var story_array: PackedStringArray = []:
	set(str_array):
		story_array = str_array
		if is_node_ready():
			substring_sizes = []
			if Engine.is_editor_hint():
				TranslationServer.set_locale("en")
			var p: int = 0
			label.text = "[p]"
			for i in range(str_array.size()):
				label.text += TranslationServer.translate(str_array[i]).strip_edges() + " "
				substring_sizes.append(TranslationServer.translate(str_array[i]).strip_edges().length() + 1)
				if not paragraph_lengths[-1] == story_array.size()-1:
					paragraph_lengths.append(story_array.size()-1)
					push_warning("Paragraph lenghts of scene %s are misconfigured!" % name)
				if paragraph_lengths[p] == i:
					p += 1
					label.text += "[/p][p][font_size=8] [/font_size][/p][p]"
					substring_sizes[-1] = substring_sizes[-1] + 1
			label.text += "[/p]"
			max_lines = float(label.get_line_count())

@export var paragraph_lengths: PackedInt32Array = [1]

@export var progress: float = 0:
	set(value):
		progress = value
		if is_node_ready() and not all_text_revealed:
			var start_index = 0
			if progress >= substring_sizes.size() or progress < 0:
				label.visible_ratio = 1
			elif progress > 0:
				for i in range(min(progress, substring_sizes.size()-1) as int) if progress > 0 else range(substring_sizes.size()-1):
					start_index += substring_sizes[i]
			
				label.visible_characters = start_index + substring_sizes[min(progress as int, substring_sizes.size()-1)] * fmod(progress, 1)
			else:
				label.visible_ratio = 0

var all_text_revealed: bool = false:
	set(revealed):
		var reset_progress := false
		if revealed and not all_text_revealed:
			var tween: Tween = get_tree().create_tween()
			tween.set_ease(Tween.EASE_OUT)
			tween.tween_property(label, "visible_ratio", 1, 1.5)
		elif not revealed and all_text_revealed:
			reset_progress = true
		all_text_revealed = revealed
		if all_text_revealed: progress = -1
		if reset_progress: progress = 0

@export var test_scroll: bool:
	set(scroll):
		try_scroll()

@onready var label:RichTextLabel = %StoryLabel
@onready var scroll_container:ScrollContainer = %StoryScroll
@onready var animation_player: AnimationPlayer = %AnimationPlayer
@onready var skip_control: SkipControl = %SkipControl

@export var animation_complete:bool = false:
	set(value):
		animation_complete = value
		if value:
			scroll_container.vertical_scroll_mode = ScrollContainer.ScrollMode.SCROLL_MODE_AUTO
			progress = -1
		else:
			scroll_container.scroll_vertical = ScrollContainer.ScrollMode.SCROLL_MODE_DISABLED
		animation_complete = value

var substring_sizes: Array[int]

func _ready() -> void:
	State.settings_changed.connect(func(): story_array = story_array)
	skip_control = %SkipControl
	if skip_control is SkipControl and not Engine.is_editor_hint():
		skip_control.skip.connect(skip_text)
	
	if get_tree().root.get_child(-1) == self:
		TranslationServer.set_locale("de")
		play_scene()
	story_array = story_array
	progress = progress
		
func try_scroll():
	var forward_target: int
	
	#print( "max lines: " + str(max_lines))
	#print( "current lines: " + str(label.get_character_line(label.visible_characters)))
	
	var visible_ratio: float = float(label.get_character_line(label.visible_characters)) / max_lines
	
	#print("Tried scrolling with ratio of %f. Comparing %f against %f" % [visible_ratio, label.size.y * visible_ratio - scroll_container.scroll_vertical, scroll_container.size.y * 0.9])
	
	if label.size.y * visible_ratio + scroll_container.scroll_vertical > scroll_container.size.y * 0.9:
		if scroll_container.scroll_vertical + scroll_container.size.y * 0.9 < label.size.y:
			forward_target = scroll_container.scroll_vertical + scroll_container.size.y * 0.8
		else:
			forward_target = label.size.y - scroll_container.size.y 
	if scroll_target != null:
		var tween: Tween = get_tree().create_tween()
		##tween.set_trans()
		scroll_target = forward_target

func play_scene():
	# FIXME: find out why this needs to be set to prevent scenes from being fully revealed
	all_text_revealed = false
	animation_complete = false
	##FIXME match State.speech_language:
	match TranslationServer.get_locale():
		"de":
			animation_player.queue("en")
		"en":
			animation_player.queue("en")
	
	await text_finished
	
	if name == "draven":
		trigger_intro()
	
	animation_complete = true
	all_text_revealed = true
	
	skip_control.start_proceed_countdown()
	
	await skip_control.proceed
	
	animation_player.play("vanish")
	
	await animation_player.animation_finished
	
	finished.emit()

func _unhandled_input(event: InputEvent) -> void:
	var just_revealed_text = false
	if event is InputEventMouseButton:
		if event.button_index == MOUSE_BUTTON_WHEEL_DOWN:
			scroll_target += 40
			if not all_text_revealed: just_revealed_text
			all_text_revealed = true
		if event.button_index == MOUSE_BUTTON_WHEEL_UP:
			scroll_target -= 40
			if not all_text_revealed: just_revealed_text
			all_text_revealed = true
	if just_revealed_text:
		if animation_complete: all_text_revealed = true

var scroll_target: float = 0:
	set(value):
		scroll_target = clampf(value, 0, label.size.y - scroll_container.size.y+10)
func _process(delta: float) -> void:
	# FIXME: maybe change this to has stage?
	if visible and not Engine.is_editor_hint():
		if scroll_container.scroll_vertical != scroll_target:
			scroll_container.scroll_vertical += (scroll_target-scroll_container.scroll_vertical)*delta*6

var intro_triggered:= false
func trigger_intro():
	if not intro_triggered:
		intro.emit()
		intro_triggered = true

var was_skipped = false
func skip_text():
	if not animation_complete:
		animation_player.stop(true)
		was_skipped = true
		text_finished.emit()
		if name == "draven":
			$AnimationPlayer/Music.stop()
		elif name == "JuiJutsu":
			_emit_thunder()

func _on_text_finished():
	if not animation_complete:
		text_finished.emit()

func _emit_thunder():
	emit_thunder.emit()