extends VBoxContainer

const Style := preload("res://scripts/ui/ui_style.gd")
const AUTH_LOGIN_URL := "https://pauth.ranaze.com/api/Auth/login"

var main: Control
var username_input: LineEdit
var password_input: LineEdit
var login_button: Button
var error_label: Label
var login_request: HTTPRequest

func _ready() -> void:
	set_anchors_preset(Control.PRESET_FULL_RECT)
	add_theme_constant_override("separation", 18)

	var spacer_top := Control.new()
	spacer_top.size_flags_vertical = Control.SIZE_EXPAND_FILL
	add_child(spacer_top)

	var center := CenterContainer.new()
	center.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	add_child(center)

	var panel := PanelContainer.new()
	panel.custom_minimum_size = Vector2(520, 430)
	panel.add_theme_stylebox_override("panel", Style.panel_box(Color("172337"), Color("2bdbff")))
	center.add_child(panel)

	var content := VBoxContainer.new()
	content.add_theme_constant_override("separation", 14)
	panel.add_child(content)

	var title := Label.new()
	title.text = "STEP 3 Arcade"
	title.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	Style.set_label(title, 36, Style.TEXT)
	content.add_child(title)

	var subtitle := Label.new()
	subtitle.text = "Sign in with your Promiscuity account to start studying."
	subtitle.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	subtitle.autowrap_mode = TextServer.AUTOWRAP_WORD_SMART
	Style.set_label(subtitle, 16, Style.MUTED)
	content.add_child(subtitle)

	var username_label := Label.new()
	username_label.text = "Username"
	Style.set_label(username_label, 15, Style.CYAN)
	content.add_child(username_label)

	username_input = LineEdit.new()
	username_input.placeholder_text = "enter username"
	username_input.custom_minimum_size = Vector2(0, 44)
	username_input.text_submitted.connect(_on_input_submitted)
	content.add_child(username_input)

	var password_label := Label.new()
	password_label.text = "Password"
	Style.set_label(password_label, 15, Style.CYAN)
	content.add_child(password_label)

	password_input = LineEdit.new()
	password_input.placeholder_text = "enter password"
	password_input.secret = true
	password_input.custom_minimum_size = Vector2(0, 44)
	password_input.text_submitted.connect(_on_input_submitted)
	content.add_child(password_input)

	login_button = Button.new()
	login_button.text = "Log In"
	login_button.custom_minimum_size = Vector2(0, 50)
	Style.style_primary_button(login_button)
	login_button.pressed.connect(_on_login_pressed)
	content.add_child(login_button)

	error_label = Label.new()
	error_label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	error_label.autowrap_mode = TextServer.AUTOWRAP_WORD_SMART
	Style.set_label(error_label, 15, Style.RED)
	content.add_child(error_label)

	var spacer_bottom := Control.new()
	spacer_bottom.size_flags_vertical = Control.SIZE_EXPAND_FILL
	add_child(spacer_bottom)

	login_request = HTTPRequest.new()
	login_request.name = "LoginRequest"
	login_request.request_completed.connect(_on_login_request_completed)
	add_child(login_request)


func on_show(_payload: Variant = null) -> void:
	error_label.text = ""
	login_button.disabled = false
	login_button.text = "Log In"
	username_input.grab_focus()


func _on_login_pressed() -> void:
	var username := username_input.text.strip_edges()
	var password := password_input.text
	if username.is_empty() or password.is_empty():
		_show_error("Username and password required.")
		return

	login_button.disabled = true
	login_button.text = "Signing in..."
	error_label.text = ""

	var payload := {
		"username": username,
		"password": password,
	}
	var headers := PackedStringArray(["Content-Type: application/json"])
	var err := login_request.request(AUTH_LOGIN_URL, headers, HTTPClient.METHOD_POST, JSON.stringify(payload))
	if err != OK:
		login_button.disabled = false
		login_button.text = "Log In"
		_show_error("Failed to send login request.")


func _on_login_request_completed(result: int, response_code: int, _headers: PackedStringArray, body: PackedByteArray) -> void:
	login_button.disabled = false
	login_button.text = "Log In"

	if result != HTTPRequest.RESULT_SUCCESS:
		_show_error("Network error. Please try again.")
		return

	if response_code < 200 or response_code >= 300:
		_show_error("Login failed. Check your credentials.")
		return

	var response: Variant = JSON.parse_string(body.get_string_from_utf8())
	if typeof(response) != TYPE_DICTIONARY:
		_show_error("Login response was not valid JSON.")
		return

	var token := String(response.get("accessToken", ""))
	var username := String(response.get("username", username_input.text.strip_edges()))
	if token.is_empty():
		_show_error("Login response did not include an access token.")
		return

	AuthState.set_session(
		username,
		token,
		String(response.get("refreshToken", "")),
		String(response.get("role", "")),
		String(response.get("exp", ""))
	)
	QuestionBankService.load_questions_from_api()
	password_input.text = ""
	main.show_screen("menu")


func _on_input_submitted(_new_text: String) -> void:
	_on_login_pressed()


func _show_error(message: String) -> void:
	error_label.text = message