# Displays a Lesson ressource and a list a button to start each practice in a

# lesson.

#

# When pressing a practice button, emits an event so the navigation can

# transition to the practice screen.

class_name UILesson

extends Control

const ContentBlockScene := preload("UIContentBlock.tscn")

const QuizInputFieldScene := preload("quizzes/UIQuizInputField.tscn")

const QuizChoiceScene := preload("quizzes/UIQuizChoice.tscn")

const PracticeButtonScene := preload("UIPracticeButton.tscn")

const RevealerScene := preload("components/Revealer.tscn")

const COLOR_NOTE := Color(0.14902, 0.776471, 0.968627)

export var test_lesson: Resource

onready var _title := $ScrollContainer/MarginContainer/Column/Title as Label

onready var _content_blocks := $ScrollContainer/MarginContainer/Column/ContentBlocks as VBoxContainer

onready var _practices_container := $ScrollContainer/MarginContainer/Column/Column/Practices as VBoxContainer

onready var _practices_visibility_container := $ScrollContainer/MarginContainer/Column/Column as VBoxContainer

var _visible_index := -1

var _quizzes_done := -1 # Start with -1 because we will always autoincrement at least once.

var _quizz_count := 0

func _ready() -> void:

if test_lesson and get_parent() == get_tree().root:

setup(test_lesson, null)

func setup(lesson: Lesson, course: Course) -> void:

if not is_inside_tree():

yield(self, "ready")

_title.text = lesson.title

var user_profile := UserProfiles.get_profile()

for block in lesson.content_blocks:

if block is ContentBlock:

var instance: UIContentBlock = ContentBlockScene.instance()

instance.setup(block)

if block.type == ContentBlock.Type.PLAIN:

_content_blocks.add_child(instance)

instance.hide()

else:

var revealer := RevealerScene.instance() as Revealer

revealer.hide()

if block.type == ContentBlock.Type.NOTE:

revealer.text_color = COLOR_NOTE

revealer.title = "Note"

else:

revealer.title = "Learn More"

revealer.padding = 0.0

revealer.first_margin = 0.0

revealer.children_margin = 0.0

_content_blocks.add_child(revealer)

revealer.add_child(instance)

instance.set_draw_panel(true)

elif block is Quiz:

var completed_before := false

if course:

completed_before = user_profile.is_lesson_quiz_completed(course.resource_path, lesson.resource_path, block.resource_path)

if completed_before:

_quizzes_done += 1

var scene = QuizInputFieldScene if block is QuizInputField else QuizChoiceScene

var instance = scene.instance()

_content_blocks.add_child(instance)

instance.setup(block)

instance.completed_before = completed_before

instance.hide()

instance.connect("quiz_passed", Events, "emit_signal", ["quiz_completed", block])

instance.connect("quiz_passed", self, "_reveal_up_to_next_quiz")

instance.connect("quiz_skipped", self, "_reveal_up_to_next_quiz")

var highlighted_next := false

for practice in lesson.practices:

var button: UIPracticeButton = PracticeButtonScene.instance()

button.setup(practice)

if course:

button.completed_before = user_profile.is_lesson_practice_completed(course.resource_path, lesson.resource_path, practice.resource_path)

if not highlighted_next and not button.completed_before:

highlighted_next = true

button.is_highlighted = true

_practices_container.add_child(button)

_practices_visibility_container.hide()

_quizz_count = lesson.get_quizzes_count()

_reveal_up_to_next_quiz()

func _reveal_up_to_next_quiz() -> void:

_quizzes_done += 1

var child_count := _content_blocks.get_child_count()

while _visible_index < child_count - 1:

_visible_index += 1

var child = _content_blocks.get_child(_visible_index)

child.show()

if child is UIBaseQuiz and not child.completed_before:

break

if _visible_index >= child_count - 1 and _quizzes_done >= _quizz_count:

_practices_visibility_container.show()