extends Control
class_name DialogueBox

signal end
signal update

export (NodePath) var title_path
onready var title = get_node(title_path) as RichTextLabel

export (NodePath) var text_path
onready var text = get_node(text_path) as RichTextLabel

export (NodePath) var expression_path
onready var expression = get_node(expression_path) as RichTextLabel

var _dialogue : Array
var _index : int

func _ready():
	assert(title != null)
	assert(text != null)

func start(dialogue : Array):
	_dialogue = dialogue
	_index = 0
	_update()
	show()

func _input(event):
	if event.is_action_pressed("ui_accept"):
		if text.visible_characters < text.text.length():
			text.visible_characters = text.text.length()
		else:
			next()

func next() -> void:
	_index += 1
	if _index >= _dialogue.size():
		hide()
		emit_signal('end')
		return
	_update()

func _update() -> void:
	title.bbcode_text = _dialogue[_index].name
	title.rect_min_size.x = title.get_font('normal_font').get_string_size(title.text).x
	text.bbcode_text = _dialogue[_index].text
	#expression = _dialogue[_index].expression
	
	emit_signal('update')
	
	animate_text()

func animate_text():
	var animated = _index
	text.visible_characters = 0
	while animated == _index && text.visible_characters < text.text.length():
		if text.text[text.visible_characters] == ' ':
			text.visible_characters += 1
		text.visible_characters += 1
		yield(get_tree().create_timer(0.05), 'timeout')