// src/pages/MonitoringDetail/MonitoringDetail.jsx
// Page de détail d'un monitoring avec fil d'Ariane, tableau d'erreurs, export CSV
import { useState, useEffect } from 'react';
import { useParams, useNavigate } from 'react-router-dom';
import { Download, TrendingUp } from 'lucide-react';
import { getMonitoringById, getMonitoringDetails, getMonitoringCount, getMonitoringColumns, exportToCSV } from '../../services/api';
import DataTable from '../../components/common/DataTable';
import LoadingSpinner from '../../components/common/LoadingSpinner';
import ErrorMessage from '../../components/common/ErrorMessage';
import Badge from '../../components/common/Badge';
import Button from '../../components/common/Button';
import { getStatutMonitoring } from '../../utils/statutMonitoring';
import styles from './MonitoringDetail.module.css';

export default function MonitoringDetail() {
  const { id } = useParams();
  const navigate = useNavigate();
  const [monitoring, setMonitoring] = useState(null);
  const [details, setDetails] = useState([]);
  const [columns, setColumns] = useState([]);
  const [count, setCount] = useState(0);
  const [loading, setLoading] = useState(true);
  const [erreur, setErreur] = useState('');
  const [search, setSearch] = useState('');

  useEffect(() => {
    async function loadData() {
      setLoading(true);
      setErreur('');
      try {
        const [monit, det, cnt, cols] = await Promise.all([
          getMonitoringById(id),
          getMonitoringDetails(id, { limit: 5000 }), // Charge maximum pour export complet
          getMonitoringCount(id),
          getMonitoringColumns(id)
        ]);
        setMonitoring(monit);
        setDetails(Array.isArray(det) ? det : []);
        setCount(cnt.count ?? cnt.nb_erreurs ?? 0);
        
        // Traite les colonnes de l'API
        if (cols?.columns) {
          const colsList = cols.columns.map(col => ({
            key: col.COLUMN_NAME,
            label: col.COLUMN_NAME
          }));
          setColumns(colsList);
        }
      } catch (e) {
        setErreur(e.message || 'Erreur lors du chargement du monitoring.');
      } finally {
        setLoading(false);
      }
    }
    loadData();
  }, [id]);

  /* Filtrage des détails par recherche */
  const filteredDetails = details.filter(row => {
    if (!search) return true;
    return Object.values(row).some(val =>
      String(val || '').toLowerCase().includes(search.toLowerCase())
    );
  });

  if (loading) return <LoadingSpinner message="Chargement du monitoring..." />;
  if (erreur) return <ErrorMessage message={erreur} />;

  const statut = getStatutMonitoring(count);

  return (
    <div className={styles.page}>
      {/* Fil d'Ariane */}
      <div className={styles.breadcrumb}>
        <span onClick={() => navigate('/dashboard')} className={styles.breadcrumbLink}>Dashboard</span>
        <span className={styles.separator}>›</span>
        <span>{monitoring?.service || 'Service'}</span>
        <span className={styles.separator}>›</span>
        <span>{monitoring?.nom || 'Monitoring'}</span>
      </div>

      {/* En-tête */}
      <div className={styles.header}>
        <div className={styles.titleSection}>
          <h1 className={styles.title}>{monitoring?.nom || monitoring?.monito_intitule || 'Monitoring'}</h1>
          <div className={styles.badges}>
            {monitoring?.bdd_source && <Badge variant={monitoring.bdd_source.toLowerCase() === 'sage' ? 'sage' : 'crm'}>{monitoring.bdd_source}</Badge>}
            {monitoring?.id_categorie && <Badge variant="info">Catégorie {monitoring.id_categorie}</Badge>}
            <Badge variant={statut.variant}>{statut.label}</Badge>
          </div>
        </div>
        <div className={styles.count}>
          <span className={styles.countNumber}>{count}</span>
          <span className={styles.countLabel}>erreur{count !== 1 ? 's' : ''}</span>
        </div>
      </div>

      {/* Actions */}
      <div className={styles.actions}>
        <Button variant="secondary" onClick={() => exportToCSV(filteredDetails, `monitoring_${id}_${new Date().toISOString().split('T')[0]}.csv`)}>
          <Download size={14} />
          Exporter CSV ({filteredDetails.length} lignes)
        </Button>
        <Button variant="primary" onClick={() => navigate(`/historique?id=${id}`)}>
          <TrendingUp size={14} />
          Voir l'évolution
        </Button>
      </div>

      {/* Filtres */}
      <div className={styles.filtres}>
        <input
          type="text"
          placeholder="Rechercher dans les erreurs..."
          className={styles.searchInput}
          value={search}
          onChange={e => setSearch(e.target.value)}
        />
      </div>

      {/* Résumé des résultats */}
      <div style={{ marginBottom: '1rem', fontSize: '0.9rem', color: 'var(--color-text-secondary)' }}>
        {filteredDetails.length} / {details.length} erreur{details.length !== 1 ? 's' : ''}
        {search && ` (filtré: ${search})`}
      </div>

      {/* Tableau */}
      {columns.length > 0 && (
        <DataTable
          columns={columns}
          data={filteredDetails}
          pageSize={50}
          emptyMessage="Aucune erreur trouvée."
        />
      )}

      {/* Encart aide */}
      <div className={styles.helpBox}>
        <p><strong>Aide :</strong> Ce tableau affiche les erreurs détectées pour ce monitoring. Utilisez la barre de recherche pour filtrer. L'export CSV permet de télécharger toutes les données filtrées.</p>
      </div>
    </div>
  );
}