import { NextRequest, NextResponse } from 'next/server';
import { getServerSession } from 'next-auth';
import { authOptions } from '../../auth/[...nextauth]/route';
import { PrismaClient } from '@prisma/client';

const prisma = new PrismaClient();

export async function GET(request: NextRequest) {
    const session = await getServerSession(authOptions);
    if (!session?.user?.email) return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });

    try {
        const user = await prisma.user.findUnique({
            where: { email: session.user.email },
            include: {
                tasks: true,
                calendarConnections: true,
                accounts: true
            }
        });

        if (!user) return NextResponse.json({ error: 'User not found' }, { status: 404 });

        // Sanitize
        const exportData = {
            profile: {
                name: user.name,
                email: user.email,
                joined: user.createdAt,
                timezone: user.timezone
            },
            tasks: user.tasks,
            connections: user.calendarConnections.map(c => ({
                provider: c.provider,
                connectedAt: c.createdAt,
                calendars: c.calendars
            }))
        };

        // Return as file download
        return new NextResponse(JSON.stringify(exportData, null, 2), {
            headers: {
                'Content-Type': 'application/json',
                'Content-Disposition': `attachment; filename="data-export-${new Date().toISOString().split('T')[0]}.json"`
            }
        });
    } catch (error) {
        console.error('Export failed:', error);
        return NextResponse.json({ error: 'Export failed' }, { status: 500 });
    }
}