extends SceneTree

# Drives the flashcards study screen's reveal/grading render logic and keyboard mapping
# directly (no network): the screen is added to the tree so _ready() builds its controls and
# wires the FlashcardService signal connections, but no method that would send an HTTP
# request (submit_review/request_next_card) is invoked.

var failures := 0


func _initialize() -> void:
	var Study := load("res://scripts/ui/flashcards_study.gd")
	var screen = Study.new()
	screen._build()

	# Keyboard grading shortcuts: 1-4 map to Again/Hard/Good/Easy; everything else is inert.
	_assert(Study.rating_for_keycode(KEY_1) == "again", "1 should grade Again")
	_assert(Study.rating_for_keycode(KEY_2) == "hard", "2 should grade Hard")
	_assert(Study.rating_for_keycode(KEY_3) == "good", "3 should grade Good")
	_assert(Study.rating_for_keycode(KEY_4) == "easy", "4 should grade Easy")
	_assert(Study.rating_for_keycode(KEY_5) == "", "keys outside 1-4 should not grade a card")

	# Basic card: front-first, then reveal shows answer + extra and the four graded options.
	screen.current_note = {"type": "basic", "prompt": "2 + 2 = ?", "answer": "4", "extra": "Basic arithmetic"}
	screen.current_card = {"id": "card-1", "variant": 0, "revision": 1}
	screen.rating_options = [
		{"rating": "again", "intervalLabel": "<1m"}, {"rating": "hard", "intervalLabel": "6m"},
		{"rating": "good", "intervalLabel": "1d"}, {"rating": "easy", "intervalLabel": "4d"}
	]
	screen._render_card()
	_assert(screen.front_label.text == "2 + 2 = ?", "the front should show only the prompt before reveal")
	_assert(screen.reveal_button.visible, "the reveal button should be visible before the answer is shown")
	_assert(not screen.grade_row.visible, "grading buttons should be hidden before reveal")
	_assert(not screen.back_label.visible, "the back should stay hidden before reveal")

	screen._reveal()
	_assert(screen.back_label.text == "4\n\nBasic arithmetic", "reveal should show the answer plus extra")
	_assert(screen.grade_row.visible, "grading buttons should appear after reveal")
	_assert(not screen.reveal_button.visible, "the reveal button should hide once the card is revealed")
	_assert(screen.grade_buttons["good"].text.contains("1d"), "each grade button should show its computed next interval")

	# Cloze card: only the card's own variant is hidden on the front; back reveals everything.
	screen.current_note = {"type": "cloze", "prompt": "{{c1::Paris}} is the capital of France", "answer": "", "extra": ""}
	screen.current_card = {"id": "card-2", "variant": 1, "revision": 1}
	screen.revealed = false
	screen._render_card()
	_assert(screen.front_label.text == "[...] is the capital of France", "cloze front should hide only its own variant")
	screen._reveal()
	_assert(screen.back_label.text == "Paris is the capital of France", "cloze back should reveal every deletion")

	screen.free()
	quit(1 if failures > 0 else 0)


func _assert(condition: bool, message: String) -> void:
	if condition:
		return
	failures += 1
	push_error(message)