/* ============================================================
   CONFIGURACIÓN
   ============================================================ */

function Toggle({ on, onClick }) {
  return (
    <button className={'toggle' + (on ? ' on' : '')} onClick={onClick} role="switch" aria-checked={on}>
      <span className="knob"></span>
      <style>{`
        .toggle { width: 40px; height: 23px; border-radius: 20px; background: var(--surface-3); border: 1px solid var(--line-2); position: relative; transition: background .18s, border-color .18s; flex-shrink: 0; }
        .toggle.on { background: var(--violet); border-color: var(--violet); }
        .toggle .knob { position: absolute; top: 2px; left: 2px; width: 17px; height: 17px; border-radius: 50%; background: #fff; transition: transform .18s; box-shadow: 0 1px 3px rgba(0,0,0,0.4); }
        .toggle.on .knob { transform: translateX(17px); }
      `}</style>
    </button>
  );
}

function Configuracion({ user, onSave, isGuest, session, onRegister, onOpenPrivacy }) {
  const [name, setName] = useState(user.name);
  const [email, setEmail] = useState(user.email);
  const [activity, setActivity] = useState(user.activity || 'autonomo');
  const [saved, setSaved] = useState(false);
  const usage = useUsage();
  const dirty = name !== user.name || email !== user.email || activity !== (user.activity || 'autonomo');

  // Datos reales de plan y uso (centralizados en store.jsx).
  const plan = lxCurrentPlan(session);
  const limits = lxPlanLimits(plan);
  const planName = lxPlanLabel(plan, 'es');
  const chatUsed = usage.chat || 0;
  const contractUsed = usage.contract || 0;
  const reviewUsed = usage.review || 0;
  const fmtLimit = (n) => n === Infinity ? 'ilimitado' : n;

  // Lista de espera: abre el correo del usuario con un mensaje preparado.
  const waitlistPlan = (planNombre) => {
    const asunto = encodeURIComponent('Lista de espera Lexly - Plan ' + planNombre);
    const cuerpo = encodeURIComponent(
      'Hola, me interesa el Plan ' + planNombre + ' de Lexly.\n\n' +
      'Avisadme en cuanto estén activos los pagos.\n\n' +
      (email ? 'Mi cuenta: ' + email + '\n' : '')
    );
    window.location.href = 'mailto:lexly.informacion@gmail.com?subject=' + asunto + '&body=' + cuerpo;
  };

  const save = () => {
    if (!name.trim()) return;
    onSave?.({ name: name.trim(), email: email.trim(), activity });
    setSaved(true);
    setTimeout(() => setSaved(false), 2200);
  };
  const [toggles, setToggles] = useState({ fiscal: true, email: true, weekly: false, product: true });
  const tog = (k) => () => setToggles(t => ({ ...t, [k]: !t[k] }));

  return (
    <div className="section-pad fade-up">
      <div className="eyebrow">Cuenta</div>
      <h1 className="h-title">Configuración</h1>
      <p className="h-sub">Gestiona tu perfil, tu plan y cómo quieres que Lexly te avise.</p>

      <div className="set-blocks">
        {isGuest && (
          <div className="card set-guest">
            <div className="sg-ic"><Icon name="user" size={20} /></div>
            <div className="sg-text">
              <strong>Estás navegando como invitado</strong>
              <span>Crea tu cuenta gratuita para guardar tu perfil, generar contratos y revisar documentos sin límites.</span>
            </div>
            <button className="btn btn-primary" onClick={onRegister}><Icon name="sparkle" size={15} /> Crear cuenta gratis</button>
          </div>
        )}
        {/* Perfil */}
        <div className="card set-card">
          <div className="set-card-head"><Icon name="user" size={15} /> Perfil</div>
          <div className="set-card-body">
            <div className="field-row">
              <div className="field"><label>Nombre</label>
                <input className="input" value={name} onChange={e => setName(e.target.value)} /></div>
              <div className="field"><label>Email</label>
                <input className="input" value={email} onChange={e => setEmail(e.target.value)} /></div>
            </div>
            <div className="field" style={{ marginBottom: 0 }}>
              <label>Tipo de actividad</label>
              <select className="select" value={activity} onChange={e => setActivity(e.target.value)}>
                <option value="autonomo">Autónomo / Freelancer</option>
                <option value="pyme">Pyme / Sociedad</option>
                <option value="particular">Particular</option>
              </select>
            </div>
            <div className="set-save-row">
              {saved && <span className="set-saved"><Icon name="check" size={14} /> Guardado</span>}
              <button className="btn btn-primary" disabled={!dirty || !name.trim()} onClick={save}>Guardar cambios</button>
            </div>
          </div>
        </div>

        {/* Plan */}
        <div className="card set-card">
          <div className="set-card-head"><Icon name="bolt" size={15} /> Plan</div>
          <div className="set-card-body">
            <div className="plan-row">
              <div>
                <div className="plan-row-name">{planName}</div>
                <div className="plan-row-meta">
                  {plan === 'guest' ? '15 consultas · 3 contratos · 1 revisión al mes'
                    : plan === 'free' ? '15 consultas · 3 contratos · 1 revisión al mes'
                    : plan === 'particular' ? 'Chat ilimitado · 5 contratos · 3 revisiones'
                    : 'Todo ilimitado · Análisis de riesgos · Asistente con Hacienda'}
                </div>
              </div>
              {isGuest
                ? <div className="plan-badge guest"><span className="dot"></span>Invitado</div>
                : <div className="plan-badge"><span className="dot"></span>{plan === 'free' ? 'Gratis' : 'Activo'}</div>}
            </div>
            <div className="plan-usage">
              <div className="pu-row"><span>Consultas este mes</span><span>{chatUsed} <i>/ {fmtLimit(limits.chat)}</i></span></div>
              <div className="pu-row"><span>Contratos generados</span><span>{contractUsed} <i>/ {fmtLimit(limits.contract)}</i></span></div>
              <div className="pu-row"><span>Documentos revisados</span><span>{reviewUsed} <i>/ {fmtLimit(limits.review)}</i></span></div>
            </div>
            {isGuest ? (
              <button className="btn btn-ghost set-plan-btn" onClick={onRegister}>Crear cuenta gratis</button>
            ) : plan === 'free' ? (
              <button className="btn btn-primary set-plan-btn" onClick={() => { const el = document.getElementById('lexly-planes-info'); if (el) el.scrollIntoView({ behavior: 'smooth' }); }}>Mejora tu plan</button>
            ) : (
              <button className="btn btn-ghost set-plan-btn" onClick={() => { const el = document.getElementById('lexly-planes-info'); if (el) el.scrollIntoView({ behavior: 'smooth' }); }}>Gestionar suscripción</button>
            )}
          </div>
        </div>

        {/* Información de planes (visible para registrados sin plan de pago) */}
        {!isGuest && (
          <div className="card set-card" id="lexly-planes-info">
            <div className="set-card-head"><Icon name="sparkle" size={15} /> Planes disponibles</div>
            <div className="set-card-body">
              <p className="planes-intro">Estamos activando los pagos. Mientras tanto, usa Lexly gratis. Si te interesa un plan, apúntate a la lista de espera y te avisamos en cuanto esté disponible.</p>
              <div className="planes-mini">
                <div className="pm-row"><strong>Particular · 9,90 €/mes</strong><span>Chat ilimitado, 5 contratos y 3 revisiones al mes.</span><button className="pm-cta" onClick={() => waitlistPlan('Particular')}>Apuntarme a la lista de espera</button></div>
                <div className="pm-row featured"><strong>Autónomo · 29 €/mes</strong><span>Todo ilimitado + análisis de riesgos + asistente con Hacienda.</span><button className="pm-cta" onClick={() => waitlistPlan('Autónomo')}>Apuntarme a la lista de espera</button></div>
                <div className="pm-row"><strong>Pyme · 79 €/mes</strong><span>Todo lo anterior para hasta 10 usuarios + normativa laboral y mercantil.</span><button className="pm-cta" onClick={() => waitlistPlan('Pyme')}>Apuntarme a la lista de espera</button></div>
              </div>
              <a className="btn btn-ghost set-plan-btn" href="index.html#precios" target="_blank" rel="noopener">Ver todos los planes y precios</a>
            </div>
            <style>{`
              .planes-intro { font-size: 13px; color: var(--text-2); margin-bottom: 14px; line-height: 1.5; }
              .planes-mini { display: flex; flex-direction: column; gap: 10px; margin-bottom: 16px; }
              .pm-row { padding: 12px 14px; border: 1px solid var(--line); border-radius: 11px; }
              .pm-row.featured { border-color: var(--violet-line); background: var(--violet-dim); }
              .pm-row strong { display: block; font-size: 13.5px; color: var(--white); margin-bottom: 3px; }
              .pm-row span { font-size: 12.5px; color: var(--text-2); line-height: 1.45; display: block; margin-bottom: 8px; }
              .pm-cta { display: inline-block; font-size: 12.5px; font-weight: 600; color: var(--violet-soft); background: none; border: none; cursor: pointer; padding: 0; }
            `}</style>
          </div>
        )}

        {/* Notificaciones */}
        <div className="card set-card">
          <div className="set-card-head"><Icon name="bell" size={15} /> Notificaciones</div>
          <div className="set-card-body set-toggles">
            {[
              { k: 'fiscal', t: 'Alertas fiscales', d: 'Avisos automáticos antes de cada vencimiento de Hacienda.' },
              { k: 'email', t: 'Resumen por email', d: 'Recibe tus próximos plazos por correo.' },
              { k: 'weekly', t: 'Boletín semanal', d: 'Novedades legales relevantes para tu actividad.' },
              { k: 'product', t: 'Novedades de Lexly', d: 'Nuevas funciones y mejoras del producto.' },
            ].map(r => (
              <div className="tog-row" key={r.k}>
                <div><strong>{r.t}</strong><span>{r.d}</span></div>
                <Toggle on={toggles[r.k]} onClick={tog(r.k)} />
              </div>
            ))}
          </div>
        </div>

        {/* Privacidad */}
        <div className="card set-card">
          <div className="set-card-head"><Icon name="shield" size={15} /> Privacidad y datos</div>
          <div className="set-card-body">
            <p className="set-priv">Controla con detalle qué recuerda Lexly sobre ti mediante <b>consentimiento granular conforme al RGPD</b>. Todos los datos se guardan únicamente en tu dispositivo y puedes verlos, descargarlos o eliminarlos cuando quieras.</p>
            <div className="set-priv-actions">
              <button className="btn btn-primary" onClick={onOpenPrivacy}><Icon name="lockKey" size={15} /> Privacidad y mis datos</button>
              <button className="btn btn-ghost danger">Eliminar cuenta</button>
            </div>
          </div>
        </div>
      </div>

      <style>{`
        .set-blocks { display: flex; flex-direction: column; gap: 16px; margin-top: 24px; }
        .set-guest { display: flex; align-items: center; gap: 15px; padding: 16px 18px; background: linear-gradient(160deg, var(--violet-dim), transparent); border-color: var(--violet-line); flex-wrap: wrap; }
        .set-guest .sg-ic { width: 42px; height: 42px; border-radius: 11px; background: var(--violet-dim); border: 1px solid var(--violet-line); display: grid; place-items: center; color: var(--violet-soft); flex-shrink: 0; }
        .set-guest .sg-text { flex: 1; min-width: 200px; }
        .set-guest .sg-text strong { display: block; font-size: 14px; font-weight: 600; color: var(--white); margin-bottom: 2px; }
        .set-guest .sg-text span { font-size: 12.5px; color: var(--text-2); line-height: 1.45; }
        .set-card { overflow: hidden; }
        .set-card-head { display: flex; align-items: center; gap: 9px; font-size: 13px; font-weight: 600; color: var(--text); padding: 15px 20px; border-bottom: 1px solid var(--line); }
        .set-card-head .ic { color: var(--violet-soft); }
        .set-card-body { padding: 20px; }
        .set-save-row { display: flex; align-items: center; justify-content: flex-end; gap: 14px; margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--line); }
        .set-saved { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; font-weight: 600; color: var(--green); }
        .set-saved .ic { color: var(--green); }

        .plan-row { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding-bottom: 16px; border-bottom: 1px solid var(--line); }
        .plan-row-name { font-size: 15px; font-weight: 600; color: var(--white); }
        .plan-row-meta { font-size: 12.5px; color: var(--text-3); margin-top: 3px; }
        .plan-usage { padding: 16px 0; display: flex; flex-direction: column; gap: 10px; }
        .pu-row { display: flex; justify-content: space-between; font-size: 13px; color: var(--text-2); }
        .pu-row span:last-child { font-weight: 600; color: var(--text); font-variant-numeric: tabular-nums; }
        .pu-row i { color: var(--text-3); font-weight: 400; font-style: normal; }
        .set-plan-btn { width: 100%; }

        .set-toggles { display: flex; flex-direction: column; gap: 4px; }
        .tog-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 13px 0; border-bottom: 1px solid var(--line); }
        .tog-row:last-child { border-bottom: none; }
        .tog-row strong { display: block; font-size: 13.5px; font-weight: 500; color: var(--text); margin-bottom: 2px; }
        .tog-row span { font-size: 12px; color: var(--text-3); line-height: 1.4; }

        .set-priv { font-size: 13px; color: var(--text-2); line-height: 1.55; margin-bottom: 16px; }
        .set-priv b { color: var(--text); font-weight: 600; }
        .set-priv-actions { display: flex; gap: 10px; }
        .btn-ghost.danger { color: var(--red); border-color: rgba(248,113,113,0.25); }
        .btn-ghost.danger:hover { background: var(--red-dim); border-color: rgba(248,113,113,0.4); }
        @media (max-width: 520px) { .set-priv-actions { flex-direction: column; } }
      `}</style>
    </div>
  );
}

Object.assign(window, { Configuracion });