"""
This file is part of the SplendidBear Websites' projects.

Copyright (c) 2026 @ www.splendidbear.org

For the full copyright and license information, please view the LICENSE
file that was distributed with this source code.
"""

from __future__ import annotations

import threading
from collections.abc import Callable

import gi
gi.require_version("Gtk", "4.0")
gi.require_version("Adw", "1")
from gi.repository import Gtk, Adw, GLib

from mineseeker.api.auth import login, login_as_guest, TotpRequired, AuthError
from mineseeker import assets


class LoginPage(Gtk.Box):
    """Username + password login form with a 'Play as Guest' option."""

    def __init__(
        self,
        on_success: Callable[[bool], None],
        on_guest: Callable[[], None],
    ) -> None:
        super().__init__(orientation=Gtk.Orientation.VERTICAL, spacing=0)
        self._on_success = on_success
        self._on_guest = on_guest

        self.set_valign(Gtk.Align.CENTER)
        self.set_halign(Gtk.Align.CENTER)

        clamp = Adw.Clamp()
        clamp.set_maximum_size(360)

        inner = Gtk.Box(orientation=Gtk.Orientation.VERTICAL, spacing=16)
        inner.set_margin_top(32)
        inner.set_margin_bottom(32)
        inner.set_margin_start(16)
        inner.set_margin_end(16)

        # Title
        title = Gtk.Label(label="MineSeeker")
        title.add_css_class("title-1")
        inner.append(title)

        subtitle = Gtk.Label(label="Sign in to play")
        subtitle.add_css_class("dim-label")
        inner.append(subtitle)

        # Credentials group
        group = Adw.PreferencesGroup()

        self._username_row = Adw.EntryRow(title="Username")
        group.add(self._username_row)

        self._password_row = Adw.PasswordEntryRow(title="Password")
        self._password_row.connect("entry-activated", self._on_login_clicked)
        group.add(self._password_row)

        inner.append(group)

        # Error label
        self._error_label = Gtk.Label(label="")
        self._error_label.add_css_class("error")
        self._error_label.set_visible(False)
        inner.append(self._error_label)

        # Login button
        self._login_btn = Gtk.Button(label="Sign In")
        self._login_btn.add_css_class("suggested-action")
        self._login_btn.add_css_class("pill")
        self._login_btn.connect("clicked", self._on_login_clicked)
        inner.append(self._login_btn)

        # Separator
        sep = Gtk.Separator(orientation=Gtk.Orientation.HORIZONTAL)
        inner.append(sep)

        # Guest button
        guest_btn = Gtk.Button(label="Play as Guest")
        guest_btn.add_css_class("pill")
        guest_btn.connect("clicked", self._on_guest_clicked)
        inner.append(guest_btn)

        clamp.set_child(inner)
        self.append(clamp)

    def _set_busy(self, busy: bool) -> None:
        self._login_btn.set_sensitive(not busy)
        self._username_row.set_sensitive(not busy)
        self._password_row.set_sensitive(not busy)
        if busy:
            self._error_label.set_visible(False)

    def _show_error(self, message: str) -> None:
        self._error_label.set_label(message)
        self._error_label.set_visible(True)

    def _on_login_clicked(self, *_) -> None:
        username = self._username_row.get_text().strip()
        password = self._password_row.get_text()
        if not username or not password:
            self._show_error("Please enter username and password.")
            return
        self._set_busy(True)
        threading.Thread(
            target=self._do_login, args=(username, password), daemon=True
        ).start()

    def _do_login(self, username: str, password: str) -> None:
        try:
            login(username, password)
            # Load assets after successful authentication
            assets.load_sounds()
            GLib.idle_add(self._on_success, False)
        except TotpRequired:
            assets.load_sounds()
            GLib.idle_add(self._on_success, True)
        except AuthError as e:
            GLib.idle_add(self._handle_auth_error, str(e))
        except Exception as e:
            GLib.idle_add(self._handle_auth_error, f"Connection error: {e}")

    def _handle_auth_error(self, message: str) -> bool:
        self._set_busy(False)
        self._show_error(message)
        return GLib.SOURCE_REMOVE

    def _on_guest_clicked(self, *_) -> None:
        self._set_busy(True)
        threading.Thread(target=self._do_guest, daemon=True).start()

    def _do_guest(self) -> None:
        try:
            login_as_guest()
            assets.load_sounds()
            GLib.idle_add(self._on_guest)
        except Exception as e:
            GLib.idle_add(self._handle_auth_error, f"Could not start guest session: {e}")