import { FormEvent, useState } from 'react'
import { api } from './api'
import { Spinner } from './ui'

const USER_KEY = 'hamlab.user' // the last account signed in on this device, offered again

export default function Login({ onLogin }: { onLogin: () => void }) {
  const [user, setUser] = useState(localStorage.getItem(USER_KEY) ?? '')
  const [pw, setPw] = useState('')
  const [err, setErr] = useState('')
  const [busy, setBusy] = useState(false)

  async function submit(e: FormEvent) {
    e.preventDefault()
    setBusy(true); setErr('')
    try {
      const r = await api.login(user.trim(), pw)
      localStorage.setItem(USER_KEY, r?.user ?? user.trim())
      onLogin()
    } catch (e) { setErr((e instanceof Error && e.message) || 'login failed'); setBusy(false) }
  }

  return (
    <div className="center">
      <form className="login" onSubmit={submit}>
        <img className="login-logo" src="/icons/logo.png" alt="Ham Lab" width={176} height={176} />
        <input type="text" autoFocus={!user} autoComplete="username" placeholder="user" spellCheck={false} autoCapitalize="off" autoCorrect="off"
          value={user} onChange={(e) => setUser(e.target.value)} disabled={busy} />
        <input type="password" autoFocus={!!user} autoComplete="current-password" placeholder="password"
          value={pw} onChange={(e) => setPw(e.target.value)} disabled={busy} />
        <button disabled={busy || !pw}>{busy && <Spinner />}{busy ? 'Signing in…' : 'Sign in'}</button>
        {err && <div className="error">{err}</div>}
      </form>
    </div>
  )
}