import { useEffect, useRef, useState } from 'react';
import { api, type User } from '../api';
import { useI18n } from '../i18n/I18nProvider';
import { Avatar } from './Avatar';

// The signed-in account editing itself: picture, email, password. The API
// re-verifies the current password and the login limiter caps guessing, so this
// form holds no secret. Shared by the /admin settings drawer and /profile.
export function Profile({ onSaved, onUser }: { onSaved: (note: string) => void; onUser?: (user: User) => void }) {
  const { t } = useI18n();
  const [user, setUser] = useState<User | null>(null);
  const [email, setEmail] = useState('');
  const [current, setCurrent] = useState('');
  const [password, setPassword] = useState('');
  const [busy, setBusy] = useState(false);
  const [err, setErr] = useState<string | null>(null);
  const filePick = useRef<HTMLInputElement>(null);

  useEffect(() => {
    api.me().then((r) => {
      setUser(r.user);
      setEmail(r.user?.email ?? '');
    }).catch(() => undefined);
  }, []);

  const keep = (u: User) => {
    setUser(u);
    setEmail(u.email);
    onUser?.(u);
  };

  const pick = async (file: File) => {
    setBusy(true);
    setErr(null);
    try {
      keep((await api.uploadAvatar(file)).user);
      onSaved(t('adm.saved'));
    } catch (e2) {
      setErr(e2 instanceof Error ? e2.message : String(e2));
    } finally {
      setBusy(false);
    }
  };

  const submit = async (e: React.FormEvent) => {
    e.preventDefault();
    setBusy(true);
    setErr(null);
    try {
      const r = await api.updateProfile({
        email: email.trim(),
        currentPassword: current,
        ...(password ? { password } : {}),
      });
      keep(r.user);
      setPassword('');
      setCurrent('');
      onSaved(t('adm.saved'));
    } catch (e2) {
      setErr(e2 instanceof Error ? e2.message : String(e2));
    } finally {
      setBusy(false);
    }
  };

  return (
    <form className="adm-form" data-key="adm-profile" onSubmit={submit}>
      <p className="hint">{t('adm.profileHint')}</p>
      <div className="avatar-row">
        <Avatar user={user} />
        <button
          type="button"
          className="btn"
          data-key="adm-avatar-pick"
          disabled={busy}
          onClick={() => filePick.current?.click()}
        >
          {t('adm.changeAvatar')}
        </button>
        <input
          ref={filePick}
          type="file"
          accept="image/png,image/jpeg,image/webp"
          hidden
          data-key="adm-avatar-file"
          onChange={(e) => {
            const file = e.target.files?.[0];
            e.target.value = '';
            if (file) void pick(file);
          }}
        />
      </div>
      <label className="field-label" htmlFor="adm-prof-email">{t('adm.newEmail')}</label>
      <input
        id="adm-prof-email"
        className="field"
        type="email"
        required
        data-key="adm-profile-email"
        value={email}
        onChange={(e) => setEmail(e.target.value)}
      />
      <label className="field-label" htmlFor="adm-prof-current">{t('adm.currentPassword')}</label>
      <input
        id="adm-prof-current"
        className="field"
        type="password"
        required
        data-key="adm-profile-current"
        value={current}
        onChange={(e) => setCurrent(e.target.value)}
      />
      <label className="field-label" htmlFor="adm-prof-password">{t('adm.newPassword')}</label>
      <input
        id="adm-prof-password"
        className="field"
        type="password"
        minLength={8}
        placeholder="••••••••"
        data-key="adm-profile-password"
        value={password}
        onChange={(e) => setPassword(e.target.value)}
      />
      {err ? <p className="err">{err}</p> : null}
      <button type="submit" className="btn primary" data-key="adm-profile-save" disabled={busy}>
        {busy ? t('auth.busy') : t('adm.save')}
      </button>
    </form>
  );
}