import { NextRequest, NextResponse } from 'next/server';
import prisma from '@/lib/prisma';

// GET /api/favorites - Get user's favorites
export async function GET(request: NextRequest) {
    try {
        const userId = request.headers.get('x-user-id');
        if (!userId) {
            return NextResponse.json({ error: 'Utilisateur non identifié' }, { status: 401 });
        }

        const favorites = await prisma.favorite.findMany({
            where: { userId },
            include: {
                business: {
                    include: {
                        categoryRef: true,
                        country: true
                    }
                }
            },
            orderBy: { createdAt: 'desc' }
        });

        return NextResponse.json(favorites);
    } catch (error) {
        console.error('GET /api/favorites error:', error);
        return NextResponse.json({ error: 'Erreur serveur' }, { status: 500 });
    }
}

// POST /api/favorites - Toggle favorite
export async function POST(request: NextRequest) {
    try {
        const userId = request.headers.get('x-user-id');
        const body = await request.json();
        const { businessId } = body;

        if (!userId) {
            return NextResponse.json({ error: 'Utilisateur non identifié' }, { status: 401 });
        }
        if (!businessId) {
            return NextResponse.json({ error: 'businessId requis' }, { status: 400 });
        }

        // Resolve business ID (in case slug was passed)
        const business = await prisma.business.findFirst({
            where: {
                OR: [
                    { id: businessId },
                    { slug: businessId }
                ]
            },
            select: { id: true }
        });

        if (!business) {
            return NextResponse.json({ error: 'Entreprise non trouvée' }, { status: 404 });
        }

        const actualBusinessId = business.id;

        // Check if already favorited
        const existing = await prisma.favorite.findUnique({
            where: {
                userId_businessId: {
                    userId,
                    businessId: actualBusinessId
                }
            }
        });

        if (existing) {
            // Unfavorite
            await prisma.favorite.delete({
                where: { id: existing.id }
            });
            return NextResponse.json({ favorited: false });
        } else {
            // Favorite
            await prisma.favorite.create({
                data: {
                    userId,
                    businessId: actualBusinessId
                }
            });
            return NextResponse.json({ favorited: true });
        }
    } catch (error) {
        console.error('POST /api/favorites error:', error);
        return NextResponse.json({ error: 'Erreur lors du changement de favori' }, { status: 500 });
    }
}