import { useEffect, useState } from 'react';
import { Save, Send } from 'lucide-react';
import { useUi } from '../../context/ui-context.jsx';
import { useAsync, useAction } from '../../hooks/useAsync.js';
import { getSmtpConfig, updateSmtpConfig, testSmtpConfig } from '../../services/settings.js';
import { Field, FieldRow } from '../../components/Field.jsx';
import { Button } from '../../components/Button.jsx';
import { InfoBar } from '../../components/InfoBar.jsx';
import { PasswordInput } from '../../components/PasswordInput.jsx';

export default function SmtpSettingsPanel() {
  const { t, pushToast } = useUi();
  const runAction = useAction();
  const { data: config, reload } = useAsync(getSmtpConfig, []);
  const [form, setForm] = useState({ host: '', port: 587, user: '', from: '', pass: '' });
  const [testTo, setTestTo] = useState('');
  const [testing, setTesting] = useState(false);
  const [testResult, setTestResult] = useState(null); // { ok: bool, message: string }

  useEffect(() => {
    if (config) setForm({ host: config.host, port: config.port, user: config.user, from: config.from, pass: '' });
  }, [config]);

  async function save() {
    await runAction(async () => {
      await updateSmtpConfig(form);
      await reload();
      setForm((f) => ({ ...f, pass: '' }));
      pushToast({ tone: 'success', message: t('common_saved') });
    });
  }

  async function sendTest() {
    setTestResult(null);
    setTesting(true);
    try {
      await testSmtpConfig({ ...form, to: testTo });
      setTestResult({ ok: true, message: `${t('smtp_test_success')} ${testTo}` });
    } catch (err) {
      setTestResult({ ok: false, message: err.message });
    } finally {
      setTesting(false);
    }
  }

  if (!config) return <div className="text-muted">{t('common_loading')}</div>;

  const canTest = form.host && form.user && testTo && !testing;

  return (
    <div>
      {!config.configured && <InfoBar tone="warning" dismissible={false}>{t('smtp_not_configured')}</InfoBar>}
      <FieldRow>
        <Field label={t('smtp_host')}>
          <input className="input" value={form.host} onChange={(e) => setForm((f) => ({ ...f, host: e.target.value }))} placeholder="192.168.222.10" />
        </Field>
        <Field label={t('smtp_port')}>
          <input className="input" type="number" value={form.port} onChange={(e) => setForm((f) => ({ ...f, port: Number(e.target.value) }))} />
        </Field>
      </FieldRow>
      <FieldRow>
        <Field label={t('smtp_user')}>
          <input className="input" value={form.user} onChange={(e) => setForm((f) => ({ ...f, user: e.target.value }))} placeholder="project@linkedcorp.net" />
        </Field>
        <Field label={t('smtp_from')}>
          <input className="input" value={form.from} onChange={(e) => setForm((f) => ({ ...f, from: e.target.value }))} placeholder="project@linkedcorp.net" />
        </Field>
      </FieldRow>
      <Field label={t('smtp_pass')} hint={config.configured ? t('smtp_pass_configured_hint') : undefined}>
        <PasswordInput value={form.pass} onChange={(e) => setForm((f) => ({ ...f, pass: e.target.value }))} />
      </Field>
      <Button variant="accent" icon={Save} onClick={save}>{t('common_save')}</Button>

      <div className="panel-card" style={{ marginTop: 16 }}>
        <h4 style={{ marginTop: 0 }}>{t('smtp_test_title')}</h4>
        <div className="text-muted" style={{ fontSize: '.76rem', marginBottom: 10 }}>{t('smtp_test_hint')}</div>
        <FieldRow>
          <Field label={t('smtp_test_to')}>
            <input className="input" type="email" value={testTo} onChange={(e) => setTestTo(e.target.value)} placeholder="tucorreo@linkedcorp.net" />
          </Field>
        </FieldRow>
        {testResult && (
          <InfoBar tone={testResult.ok ? 'success' : 'error'}>{testResult.message}</InfoBar>
        )}
        <Button variant="standard" icon={Send} onClick={sendTest} disabled={!canTest}>
          {testing ? t('smtp_test_sending') : t('smtp_test_send')}
        </Button>
      </div>
    </div>
  );
}