import flet as ft
import designer as d
import api_client as api


class LoginView:
    def __init__(self, page: ft.Page):
        self.page = page
        self._username = d.text_field("Логин", prefix_icon=ft.icons.PERSON_OUTLINE)
        self._password = d.text_field("Пароль", password=True, prefix_icon=ft.icons.LOCK_OUTLINE)
        self._error = ft.Text("", color=d.ERROR, size=13)
        self._btn = d.btn_primary("Войти", on_click=self._on_login, width=280)

    def build_page_view(self) -> ft.View:
        self._username.on_submit = self._on_login
        self._password.on_submit = self._on_login

        form = ft.Container(
            content=ft.Column(
                [
                    ft.Icon(ft.icons.NEWSPAPER, size=56, color=d.PRIMARY),
                    d.headline("Новостная CMS", size=24),
                    d.caption("Войдите в панель управления", color=d.TEXT_SECONDARY),
                    ft.Divider(height=20, color="transparent"),
                    self._username,
                    self._password,
                    self._error,
                    ft.Divider(height=8, color="transparent"),
                    self._btn,
                ],
                horizontal_alignment=ft.CrossAxisAlignment.CENTER,
                spacing=14,
                width=320,
            ),
            bgcolor=d.SURFACE,
            border_radius=16,
            padding=40,
            shadow=ft.BoxShadow(blur_radius=24, color=ft.colors.with_opacity(0.10, ft.colors.BLACK)),
        )

        return ft.View(
            route="/admin/login",
            bgcolor=d.BACKGROUND,
            controls=[
                ft.Container(
                    content=form,
                    alignment=ft.alignment.center,
                    expand=True,
                )
            ],
            vertical_alignment=ft.MainAxisAlignment.CENTER,
            horizontal_alignment=ft.CrossAxisAlignment.CENTER,
        )

    async def _on_login(self, e=None):
        self._error.value = ""
        username = self._username.value.strip()
        password = self._password.value.strip()
        if not username or not password:
            self._error.value = "Заполните все поля"
            self.page.update()
            return

        self._btn.disabled = True
        self.page.update()

        token = await api.admin_login(username, password)
        self._btn.disabled = False

        if token:
            self.page.session.set("token", token)
            self.page.session.set("username", username)
            self.page.go("/admin")
        else:
            self._error.value = "Неверный логин или пароль"
            self.page.update()