import React, { useState, useEffect } from 'react';
import { useStore } from '../stores/store';

export default function Login() {
  const { login, loading, error, groupes, loadGroupes, setPage } = useStore();
  const [courriel, setCourriel] = useState(localStorage.getItem('gm_courriel') || '');
  const [pin, setPin] = useState('');
  const [groupeId, setGroupeId] = useState(localStorage.getItem('gm_groupe_id') || '');
  const [seSouvenir, setSeSouvenir] = useState(!!localStorage.getItem('gm_courriel'));

  useEffect(() => {
    if (groupes.length === 0) loadGroupes();
  }, []);

  useEffect(() => {
    if (groupes.length === 1 && !groupeId) setGroupeId(groupes[0].id);
  }, [groupes]);

  const handleSubmit = async (e) => {
    e.preventDefault();
    if (!courriel || !pin || !groupeId) return;
    try {
      await login(courriel, pin, groupeId, seSouvenir);
    } catch {}
  };

  const groupeActif = groupes.find((g) => g.id === groupeId);

  return (
    <div className="min-h-screen bg-gradient-to-b from-aa-blue to-blue-900 flex flex-col items-center justify-center p-6">
      <div className="text-center mb-6">
        <div className="text-5xl mb-3">☮️</div>
        <h1 className="text-2xl font-bold text-white">Groupe Méditation</h1>
        <p className="text-blue-200 text-sm mt-1">District 87-16 · Région 87</p>
      </div>

      {/* Infos du groupe */}
      {groupeActif && (
        <div className="w-full max-w-sm bg-white/10 rounded-2xl p-4 mb-4 text-blue-100 text-sm space-y-1">
          {groupeActif.adresse_local && (
            <p className="flex items-start gap-2">
              <span>📍</span>
              <span>{groupeActif.adresse_local}</span>
            </p>
          )}
          {groupeActif.jour_reunion && (
            <p className="flex items-center gap-2">
              <span>📅</span>
              <span>
                {groupeActif.jour_reunion.charAt(0).toUpperCase() + groupeActif.jour_reunion.slice(1)}
                {groupeActif.heure_reunion && ` à ${groupeActif.heure_reunion}`}
              </span>
            </p>
          )}
          {groupeActif.format_reunion && (
            <p className="flex items-center gap-2">
              <span>📖</span>
              <span>{groupeActif.format_reunion}</span>
            </p>
          )}
        </div>
      )}

      <form onSubmit={handleSubmit} className="w-full max-w-sm bg-white rounded-2xl shadow-xl p-6 space-y-4">
        {groupes.length > 1 && (
          <select
            value={groupeId}
            onChange={(e) => setGroupeId(e.target.value)}
            className="w-full p-4 bg-gray-50 rounded-xl text-lg border-0 focus:ring-2 focus:ring-aa-blue"
          >
            <option value="">Choisir le groupe</option>
            {groupes.map((g) => (
              <option key={g.id} value={g.id}>{g.nom}</option>
            ))}
          </select>
        )}

        <input
          type="email"
          placeholder="Adresse courriel"
          value={courriel}
          onChange={(e) => setCourriel(e.target.value)}
          className="w-full p-4 bg-gray-50 rounded-xl text-lg border-0 focus:ring-2 focus:ring-aa-blue"
          autoComplete="email"
          inputMode="email"
        />

        <input
          type="password"
          inputMode="numeric"
          pattern="[0-9]*"
          maxLength={4}
          placeholder="PIN (4 chiffres)"
          value={pin}
          onChange={(e) => setPin(e.target.value.replace(/\D/g, '').slice(0, 4))}
          className="w-full p-4 bg-gray-50 rounded-xl text-lg text-center tracking-[1em] border-0 focus:ring-2 focus:ring-aa-blue"
        />

        <label className="flex items-center gap-2 text-sm text-gray-500 cursor-pointer">
          <input type="checkbox" checked={seSouvenir}
            onChange={(e) => setSeSouvenir(e.target.checked)}
            className="rounded border-gray-300 text-aa-blue focus:ring-aa-blue" />
          Se souvenir de moi
        </label>

        {error && (
          <p className="text-red-500 text-sm text-center bg-red-50 p-3 rounded-lg">{error}</p>
        )}

        <button
          type="submit"
          disabled={loading || !courriel || pin.length !== 4 || !groupeId}
          className="w-full p-4 bg-aa-blue text-white rounded-xl text-lg font-bold disabled:opacity-40 active:scale-[0.97] transition"
        >
          {loading ? '...' : 'Connexion'}
        </button>

        <button
          type="button"
          onClick={() => setPage('inscription')}
          className="w-full p-3 text-aa-blue text-sm font-medium"
        >
          J'ai un code d'invitation →
        </button>
      </form>

      <p className="text-blue-300 text-xs mt-6">100% logiciel libre · Hébergé au Québec</p>
    </div>
  );
}