import { useEffect, useMemo, useState } from 'react'
import { FurumiPlayer } from './FurumiPlayer'
import './App.css'

type UserProfile = {
  sub: string
  name?: string
  email?: string
}

const NO_AUTH_STORAGE_KEY = 'furumiNodePlayer.runWithoutAuth'

function App() {
  const [loading, setLoading] = useState(true)
  const [user, setUser] = useState<UserProfile | null>(null)
  const [error, setError] = useState<string | null>(null)
  const [runWithoutAuth, setRunWithoutAuth] = useState(() => {
    try {
      return window.localStorage.getItem(NO_AUTH_STORAGE_KEY) === '1'
    } catch {
      return false
    }
  })

  const apiBase = useMemo(() => import.meta.env.VITE_API_BASE_URL ?? '', [])

  useEffect(() => {
    if (runWithoutAuth) {
      setError(null)
      setUser({ sub: 'noauth', name: 'No Auth' })
      setLoading(false)
      return
    }

    const loadMe = async () => {
      try {
        const response = await fetch(`${apiBase}/api/me`, {
          credentials: 'include',
        })

        if (response.status === 401) {
          setUser(null)
          return
        }

        if (!response.ok) {
          throw new Error(`Request failed with status ${response.status}`)
        }

        const data = await response.json()
        setUser(data.user ?? null)
      } catch (err) {
        setError(err instanceof Error ? err.message : 'Failed to load session')
      } finally {
        setLoading(false)
      }
    }

    void loadMe()
  }, [apiBase, runWithoutAuth])

  const loginUrl = `${apiBase}/api/login`
  const logoutUrl = `${apiBase}/api/logout`
  const playerApiRoot = `${apiBase}/api`

  return (
    <>
      {!loading && (user || runWithoutAuth) ? (
        <FurumiPlayer apiRoot={playerApiRoot} />
      ) : (
        <main className="page">
          <section className="card">
            <h1>OIDC Login</h1>
            <p className="subtitle">Авторизация обрабатывается на Express сервере.</p>

            <div className="settings">
              <label className="toggle">
                <input
                  type="checkbox"
                  checked={runWithoutAuth}
                  onChange={(e) => {
                    const next = e.target.checked
                    setRunWithoutAuth(next)
                    try {
                      if (next) window.localStorage.setItem(NO_AUTH_STORAGE_KEY, '1')
                      else window.localStorage.removeItem(NO_AUTH_STORAGE_KEY)
                    } catch {
                      // ignore
                    }
                    setLoading(true)
                    setUser(null)
                  }}
                />
                <span>Запускать без авторизации</span>
              </label>
            </div>

            {loading && <p>Проверяю сессию...</p>}
            {error && <p className="error">Ошибка: {error}</p>}

            {!loading && runWithoutAuth && (
              <p className="hint">
                Режим без авторизации включён. Для входа отключи настройку выше.
              </p>
            )}

            {!loading && !user && (
              <a className="btn" href={loginUrl}>
                Войти через OIDC
              </a>
            )}

            {!loading && user && (
              <div className="profile">
                <p>
                  <strong>ID:</strong> {user.sub}
                </p>
                {user.name && (
                  <p>
                    <strong>Имя:</strong> {user.name}
                  </p>
                )}
                {user.email && (
                  <p>
                    <strong>Email:</strong> {user.email}
                  </p>
                )}
                {!runWithoutAuth && (
                  <a className="btn ghost" href={logoutUrl}>
                    Выйти
                  </a>
                )}
              </div>
            )}
          </section>
        </main>
      )}
    </>
  )
}

export default App