'use client';
export const dynamic = 'force-dynamic';


import React, { useContext, useRef, useState, useEffect, useCallback, useMemo } from 'react';
import { Button } from 'primereact/button';
import { Column } from 'primereact/column';
import { DataTable } from 'primereact/datatable';
import { Avatar } from 'primereact/avatar';
import { Toast } from 'primereact/toast';
import { Dialog } from 'primereact/dialog';
import { Tag } from 'primereact/tag';
import { ProgressBar } from 'primereact/progressbar';
import { confirmDialog, ConfirmDialog } from 'primereact/confirmdialog';
import { useRouter, useSearchParams } from 'next/navigation';
import { ProgressSpinner } from 'primereact/progressspinner';
import { Message } from 'primereact/message';
import { LayoutContext } from '../../../layout/context/layoutcontext';
import { useDashboard, ChantierActif } from '../../../hooks/useDashboard';
import { useChantierActions } from '../../../hooks/useChantierActions';
import {
  ChantierStatusBadge,
  ChantierProgressBar,
  ChantierUrgencyIndicator
} from '../../../components/chantiers';
import ActionButtonGroup from '../../../components/chantiers/ActionButtonGroup';
import { ActionButtonType } from '../../../components/chantiers/ActionButtonStyles';
import CFASymbol from '../../../components/ui/CFASymbol';

const Dashboard = () => {
    console.log('🏗️ Dashboard: Composant chargé');

    const { layoutConfig } = useContext(LayoutContext);
    const toast = useRef<Toast>(null);
    const router = useRouter();
    const searchParams = useSearchParams();
    const [selectedChantier, setSelectedChantier] = useState<ChantierActif | null>(null);
    const [showQuickView, setShowQuickView] = useState(false);

    // Nettoyer les paramètres OAuth de l'URL après le retour de Keycloak
    useEffect(() => {
        if (typeof window === 'undefined') return;

        const url = new URL(window.location.href);

        // Nettoyer query string
        if (url.searchParams.has('code') || url.searchParams.has('state') || url.searchParams.has('session_state')) {
            console.log('🧹 Dashboard: Nettoyage des paramètres OAuth de l\'URL (query)');
            url.search = '';
            window.history.replaceState({}, '', url.toString());
        }

        // Nettoyer fragment (hash) si Keycloak utilise implicit flow par erreur
        if (url.hash && (url.hash.includes('code=') || url.hash.includes('state='))) {
            console.log('🧹 Dashboard: Nettoyage des paramètres OAuth de l\'URL (fragment)');
            url.hash = '';
            window.history.replaceState({}, '', url.toString());
        }
    }, []);

    const {
        metrics,
        chantiersActifs,
        loading,
        error,
        refresh
    } = useDashboard();

    const chantierActions = useChantierActions({
        toast,
        onRefresh: refresh
    });

    console.log('🏗️ Dashboard: État du chargement -', { loading, metricsLoaded: !!metrics, chantiersCount: chantiersActifs?.length || 0 });

    // Optimisations avec useMemo pour les calculs coûteux
    const formattedMetrics = useMemo(() => {
        if (!metrics) return null;

        return {
            chantiersActifs: metrics.chantiersActifs || 0,
            chiffreAffaires: new Intl.NumberFormat('fr-FR', {
                style: 'currency',
                currency: 'EUR',
                notation: 'compact',
                maximumFractionDigits: 1
            }).format(metrics.chiffreAffaires || 0),
            chantiersEnRetard: metrics.chantiersEnRetard || 0,
            tauxReussite: `${metrics.tauxReussite || 0}%`
        };
    }, [metrics]);

    const chantiersActifsCount = useMemo(() => {
        return chantiersActifs?.length || 0;
    }, [chantiersActifs]);

    // Templates DataTable optimisés avec useCallback
    const chantierBodyTemplate = useCallback((rowData: ChantierActif) => {
        return (
            <div className="flex align-items-center">
                <ChantierUrgencyIndicator chantier={rowData} className="mr-2" />
                <div className="mr-2">
                    <i className="pi pi-building text-primary"></i>
                </div>
                <div>
                    <div className="font-medium">{rowData.nom}</div>
                    <div className="text-500 text-sm">ID: {rowData.id?.substring(0, 8)}</div>
                </div>
            </div>
        );
    }, []);

    const clientBodyTemplate = useCallback((rowData: ChantierActif) => {
        const clientName = typeof rowData.client === 'string' ? rowData.client : rowData.client?.nom || 'N/A';
        return (
            <div className="flex align-items-center">
                <Avatar label={clientName.charAt(0)} size="normal" shape="circle" className="mr-2" />
                <span>{clientName}</span>
            </div>
        );
    }, []);

    const statutBodyTemplate = useCallback((rowData: ChantierActif) => {
        return <ChantierStatusBadge statut={rowData.statut} />;
    }, []);

    const avancementBodyTemplate = useCallback((rowData: ChantierActif) => {
        return (
            <div className="flex align-items-center justify-content-center" style={{ minWidth: '90px' }}>
                <ChantierProgressBar
                    value={rowData.avancement || 0}
                    showCompletionIcon={false}
                    showPercentage={false}
                    showValue={false}
                    size="normal"
                    style={{ width: '75px' }}
                />
                <span className="ml-2 text-xs font-semibold text-gray-600">
                    {rowData.avancement || 0}%
                </span>
            </div>
        );
    }, []);

    const budgetBodyTemplate = useCallback((rowData: ChantierActif) => {
        if (!rowData.budget) return <span className="text-500">-</span>;
        return (
            <span className="font-semibold flex align-items-center">
                {new Intl.NumberFormat('fr-FR', {
                    style: 'decimal',
                    notation: 'compact',
                    maximumFractionDigits: 1
                }).format(rowData.budget)}
                <CFASymbol size="medium" className="ml-1" />
            </span>
        );
    }, []);

    const handleQuickView = useCallback((chantier: ChantierActif) => {
        setSelectedChantier(chantier);
        setShowQuickView(true);
        // Le hook gère déjà les détails supplémentaires
        chantierActions.handleQuickView(chantier);
    }, [chantierActions]);

    const actionBodyTemplate = useCallback((rowData: ChantierActif) => {
        const actions: ActionButtonType[] = ['VIEW', 'PHASES', 'PLANNING', 'STATS', 'MENU'];

        const handleActionClick = (action: ActionButtonType | string, chantier: ChantierActif) => {
            try {
            switch (action) {
                case 'VIEW':
                    handleQuickView(chantier);
                    break;
                case 'PHASES':
                    router.push(`/chantiers/${chantier.id}/phases`);
                    break;
                case 'PLANNING':
                    router.push(`/planning?chantier=${chantier.id}`);
                    break;
                case 'STATS':
                    chantierActions.handleViewStats(chantier);
                    break;
                case 'MENU':
                    // Le menu sera géré directement par ChantierMenuActions
                    break;
                // Actions du menu "Plus d'actions"
                case 'suspend':
                    chantierActions.handleSuspendChantier(chantier);
                    break;
                case 'close':
                    chantierActions.handleCloseChantier(chantier);
                    break;
                case 'notify-client':
                    chantierActions.handleNotifyClient(chantier);
                    break;
                case 'generate-report':
                    chantierActions.handleGenerateReport(chantier);
                    break;
                case 'generate-invoice':
                    chantierActions.handleGenerateInvoice(chantier);
                    break;
                case 'create-amendment':
                    chantierActions.handleCreateAmendment(chantier);
                    break;
                default:
                        console.warn('Action non reconnue:', action);
                    break;
                }
            } catch (error) {
                console.error('Erreur lors de l\'exécution de l\'action:', action, error);
                toast.current?.show({
                    severity: 'error',
                    summary: 'Erreur',
                    detail: 'Une erreur est survenue lors de l\'exécution de l\'action',
                    life: 3000
                });
            }
        };

        return (
            <div className="flex justify-content-center">
                <ActionButtonGroup
                    chantier={rowData}
                    actions={actions}
                    onAction={handleActionClick}
                    size="sm"
                    spacing="sm"
                />
            </div>
        );
    }, [handleQuickView, router, chantierActions]);

    if (loading) {
        return (
            <div className="grid">
                <div className="col-12">
                    <div className="card">
                        <div className="text-center">
                            <ProgressSpinner style={{ width: '50px', height: '50px' }} />
                            <h5 className="mt-3">Chargement des données...</h5>
                            <p className="text-600">Récupération des informations du dashboard</p>
                        </div>
                    </div>
                </div>
            </div>
        );
    }

    if (error) {
        return (
            <div className="grid">
                <div className="col-12">
                    <div className="card">
                        <div className="text-center">
                            <i className="pi pi-exclamation-triangle text-orange-500" style={{ fontSize: '4rem' }}></i>
                            <h5>Erreur de chargement</h5>
                            <p>{error}</p>
                            <Button
                                label="Réessayer"
                                icon="pi pi-refresh"
                                onClick={refresh}
                                className="p-button-text p-button-rounded"
                            />
                        </div>
                    </div>
                </div>
            </div>
        );
    }

    return (
        <div className="grid">
            <Toast ref={toast} />
            <ConfirmDialog />

            {/* En-tête du dashboard */}
            <div className="col-12">
                <div className="card">
                    <div className="flex justify-content-between align-items-center">
                        <h5>Dashboard BTPXpress</h5>
                        <Button
                            label="Actualiser"
                            icon="pi pi-refresh"
                            onClick={refresh}
                            className="p-button-outlined p-button-sm"
                        />
                    </div>
                </div>
            </div>

            {/* Métriques KPI - Style Atlantis */}
            <div className="col-12 lg:col-3 md:col-6">
                <div className="card mb-0">
                    <div className="flex justify-content-between mb-3">
                        <div>
                            <span className="block text-500 font-medium mb-3">Chantiers Actifs</span>
                            <div className="text-900 font-medium text-xl">
                                {loading ? '...' : (formattedMetrics?.chantiersActifs || 0)}
                            </div>
                        </div>
                        <div className="flex align-items-center justify-content-center bg-blue-100 border-round" style={{ width: '2.5rem', height: '2.5rem' }}>
                            <i className="pi pi-building text-blue-500 text-xl"></i>
                        </div>
                    </div>
                </div>
            </div>
            
            <div className="col-12 lg:col-3 md:col-6">
                <div className="card mb-0">
                    <div className="flex justify-content-between mb-3">
                        <div>
                            <span className="block text-500 font-medium mb-3">CA Réalisé</span>
                            <div className="text-900 font-medium text-xl">
                                <div className="flex align-items-center">
                                    {loading ? '...' : (formattedMetrics?.chiffreAffaires || '0')}
                                    {!loading && <CFASymbol size="medium" className="ml-1" />}
                                </div>
                            </div>
                        </div>
                        <div className="flex align-items-center justify-content-center bg-green-100 border-round" style={{ width: '2.5rem', height: '2.5rem' }}>
                            <i className="pi pi-euro text-green-500 text-xl"></i>
                        </div>
                    </div>
                </div>
            </div>
            
            <div className="col-12 lg:col-3 md:col-6">
                <div className="card mb-0">
                    <div className="flex justify-content-between mb-3">
                        <div>
                            <span className="block text-500 font-medium mb-3">En Retard</span>
                            <div className="text-900 font-medium text-xl">
                                {loading ? '...' : (formattedMetrics?.chantiersEnRetard || 0)}
                            </div>
                        </div>
                        <div className="flex align-items-center justify-content-center bg-orange-100 border-round" style={{ width: '2.5rem', height: '2.5rem' }}>
                            <i className="pi pi-exclamation-triangle text-orange-500 text-xl"></i>
                        </div>
                    </div>
                </div>
            </div>
            
            <div className="col-12 lg:col-3 md:col-6">
                <div className="card mb-0">
                    <div className="flex justify-content-between mb-3">
                        <div>
                            <span className="block text-500 font-medium mb-3">Taux Réussite</span>
                            <div className="text-900 font-medium text-xl">
                                {loading ? '...' : (formattedMetrics?.tauxReussite || '0%')}
                            </div>
                        </div>
                        <div className="flex align-items-center justify-content-center bg-cyan-100 border-round" style={{ width: '2.5rem', height: '2.5rem' }}>
                            <i className="pi pi-chart-line text-cyan-500 text-xl"></i>
                        </div>
                    </div>
                </div>
            </div>

            {/* Tableau des chantiers actifs */}
            <div className="col-12">
                <div className="card">
                    <div className="flex justify-content-between align-items-center mb-5">
                        <h5>Chantiers Actifs ({chantiersActifsCount})</h5>
                        <Button 
                            icon="pi pi-refresh" 
                            className="p-button-text p-button-rounded"
                            onClick={refresh}
                            loading={loading}
                        />
                    </div>
                    
                    <DataTable 
                        value={chantiersActifs || []} 
                        paginator
                        rows={10} 
                        className="p-datatable-customers"
                        emptyMessage="Aucun chantier actif trouvé"
                        loading={loading}
                        responsiveLayout="scroll"
                    >
                        <Column 
                            field="nom" 
                            header="Chantier"
                            body={chantierBodyTemplate}
                            sortable
                        />
                        <Column 
                            field="client" 
                            header="Client"
                            body={clientBodyTemplate}
                            sortable
                        />
                        <Column 
                            field="statut" 
                            header="Statut"
                            body={statutBodyTemplate}
                            sortable
                        />
                        <Column 
                            field="avancement" 
                            header="Avancement"
                            body={avancementBodyTemplate}
                            style={{ width: '9rem', textAlign: 'center' }}
                            sortable
                        />
                        <Column 
                            field="budget" 
                            header="Budget"
                            body={budgetBodyTemplate}
                            sortable
                        />
                        <Column 
                            header="Actions"
                            body={actionBodyTemplate}
                            style={{ width: '10rem', maxWidth: '10rem', textAlign: 'center' }}
                            frozen
                            alignFrozen="right"
                        />
                    </DataTable>
                </div>
            </div>

            {/* Dialog Vue Rapide */}
            <Dialog 
                header={`Vue rapide : ${selectedChantier?.nom || ''}`}
                visible={showQuickView} 
                onHide={() => setShowQuickView(false)}
                style={{ width: '60vw' }}
                breakpoints={{ '960px': '75vw', '641px': '100vw' }}
            >
                {selectedChantier && (() => {
                    // Calculs statistiques depuis les données existantes
                    const dateDebut = selectedChantier.dateDebut ? new Date(selectedChantier.dateDebut) : null;
                    const dateFinPrevue = selectedChantier.dateFinPrevue ? new Date(selectedChantier.dateFinPrevue) : null;
                    const aujourd_hui = new Date();
                    
                    const joursEcoules = dateDebut ? 
                        Math.floor((aujourd_hui.getTime() - dateDebut.getTime()) / (1000 * 60 * 60 * 24)) : 0;
                    
                    const joursRestants = dateFinPrevue ? 
                        Math.max(0, Math.floor((dateFinPrevue.getTime() - aujourd_hui.getTime()) / (1000 * 60 * 60 * 24))) : 0;
                    
                    const dureeTotal = dateDebut && dateFinPrevue ? 
                        Math.floor((dateFinPrevue.getTime() - dateDebut.getTime()) / (1000 * 60 * 60 * 24)) : 0;
                    
                    const tauxDepense = selectedChantier.budget > 0 ? 
                        Math.round((selectedChantier.coutReel / selectedChantier.budget) * 100) : 0;
                    
                    const ecartBudget = selectedChantier.budget - selectedChantier.coutReel;
                    
                    const retard = dateFinPrevue && aujourd_hui > dateFinPrevue && selectedChantier.statut !== 'TERMINE';
                    const joursRetard = retard ? 
                        Math.floor((aujourd_hui.getTime() - dateFinPrevue.getTime()) / (1000 * 60 * 60 * 24)) : 0;
                    
                    return (
                        <div className="grid">
                            {/* Informations principales */}
                            <div className="col-12 md:col-6">
                                <div className="field">
                                    <label className="font-bold">Client</label>
                                    <p>{typeof selectedChantier.client === 'string' ? selectedChantier.client : selectedChantier.client?.nom}</p>
                                </div>
                                <div className="field">
                                    <label className="font-bold">Statut</label>
                                    <div className="flex align-items-center gap-2">
                                        <Tag value={selectedChantier.statut} severity={selectedChantier.statut === 'EN_COURS' ? 'success' : 'info'} />
                                        {retard && (
                                            <Tag value={`${joursRetard} jours de retard`} severity="danger" icon="pi pi-exclamation-triangle" />
                                        )}
                                    </div>
                                </div>
                                <div className="field">
                                    <label className="font-bold">Avancement</label>
                                    <div className="flex align-items-center gap-2">
                                        <ProgressBar 
                                            value={selectedChantier.avancement || 0} 
                                            showValue 
                                            style={{ flex: 1 }}
                                        />
                                        {selectedChantier.avancement === 100 && (
                                            <i className="pi pi-check-circle text-green-500 text-xl" />
                                        )}
                                    </div>
                                </div>
                                <div className="field">
                                    <label className="font-bold">Dates</label>
                                    <div className="text-sm">
                                        <div className="mb-1">
                                            <i className="pi pi-calendar-plus text-green-500 mr-2"></i>
                                            Début: {dateDebut ? dateDebut.toLocaleDateString('fr-FR') : 'Non définie'}
                                        </div>
                                        <div>
                                            <i className="pi pi-calendar-times text-orange-500 mr-2"></i>
                                            Fin prévue: {dateFinPrevue ? dateFinPrevue.toLocaleDateString('fr-FR') : 'Non définie'}
                                        </div>
                                    </div>
                                </div>
                            </div>
                            
                            {/* Statistiques financières */}
                            <div className="col-12 md:col-6">
                                <div className="field">
                                    <label className="font-bold">Budget</label>
                                    <div className="text-sm">
                                        <div className="mb-1">
                                            <span className="font-semibold">Prévu: </span>
                                            {selectedChantier.budget ? (
                                                <span className="flex align-items-center">
                                                    {new Intl.NumberFormat('fr-FR', { style: 'decimal' }).format(selectedChantier.budget)}
                                                    <CFASymbol size="medium" className="ml-1" />
                                                </span>
                                            ) : 'Non défini'}
                                        </div>
                                        <div className="mb-1">
                                            <span className="font-semibold">Dépensé: </span>
                                            {new Intl.NumberFormat('fr-FR', { style: 'currency', currency: 'EUR' }).format(selectedChantier.coutReel)}
                                            <span className="ml-2 text-sm">({tauxDepense}%)</span>
                                        </div>
                                        <div>
                                            <span className="font-semibold">Reste: </span>
                                            <span className={`flex align-items-center ${ecartBudget >= 0 ? 'text-green-600' : 'text-red-600'}`}>
                                                {new Intl.NumberFormat('fr-FR', { style: 'decimal' }).format(Math.abs(ecartBudget))}
                                                <CFASymbol size="medium" className="ml-1" />
                                            </span>
                                        </div>
                                    </div>
                                </div>
                                
                                <div className="field">
                                    <label className="font-bold">Durée</label>
                                    <div className="text-sm">
                                        <div className="mb-1">
                                            <i className="pi pi-clock mr-2"></i>
                                            Durée totale: {dureeTotal} jours
                                        </div>
                                        <div className="mb-1">
                                            <i className="pi pi-history mr-2 text-blue-500"></i>
                                            Jours écoulés: {joursEcoules} jours
                                        </div>
                                        <div>
                                            <i className="pi pi-hourglass mr-2 text-orange-500"></i>
                                            Jours restants: {joursRestants > 0 ? `${joursRestants} jours` : 'Terminé'}
                                        </div>
                                    </div>
                                </div>
                                
                                {/* Indicateurs de performance */}
                                <div className="field">
                                    <label className="font-bold">Performance</label>
                                    <div className="flex gap-3">
                                        <div className="text-center">
                                            <div className="text-2xl font-bold text-blue-500">
                                                {selectedChantier.avancement || 0}%
                                            </div>
                                            <div className="text-xs text-500">Avancement</div>
                                        </div>
                                        <div className="text-center">
                                            <div className="text-2xl font-bold text-green-500">
                                                {tauxDepense}%
                                            </div>
                                            <div className="text-xs text-500">Budget utilisé</div>
                                        </div>
                                        {joursEcoules > 0 && (
                                            <div className="text-center">
                                                <div className="text-2xl font-bold text-purple-500">
                                                    {Math.round((selectedChantier.avancement || 0) / joursEcoules * 10) / 10}%
                                                </div>
                                                <div className="text-xs text-500">% par jour</div>
                                            </div>
                                        )}
                                    </div>
                                </div>
                            </div>
                            {/* Actions */}
                            <div className="col-12">
                                <div className="flex justify-content-end gap-2">
                                    <Button 
                                        label="Voir détails" 
                                        icon="pi pi-external-link" 
                                        className="p-button-text p-button-rounded"
                                        onClick={() => {
                                            setShowQuickView(false);
                                            router.push(`/chantiers/${selectedChantier.id}`);
                                        }}
                                    />
                                    <Button 
                                        label="Gérer les phases" 
                                        icon="pi pi-sitemap" 
                                        className="p-button-text p-button-rounded"
                                        style={{ color: '#10B981' }}
                                        onClick={() => {
                                            setShowQuickView(false);
                                            router.push(`/chantiers/${selectedChantier.id}/phases`);
                                        }}
                                    />
                                </div>
                            </div>
                        </div>
                    );
                })()}
            </Dialog>
        </div>
    );
};

export default Dashboard;