import { NextRequest, NextResponse } from 'next/server';
import { db } from '@/lib/db';
import { users, bookings, courts } from '@/lib/db/schema';
import { eq, count, and, gte } from 'drizzle-orm';
import { getSession } from '@/lib/session';

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

		// Get current date
		const today = new Date();
		const todayStr = today.toISOString().split('T')[0];

		// Get total users count
		const [totalUsersResult] = await db.select({ count: count() }).from(users);

		// Get today's bookings count
		const [todayBookingsResult] = await db
			.select({ count: count() })
			.from(bookings)
			.where(and(eq(bookings.date, todayStr), eq(bookings.status, 'active')));

		// Get active courts count
		const [activeCourtsResult] = await db.select({ count: count() }).from(courts).where(eq(courts.isActive, true));

		// Get user's total bookings
		const [userBookingsResult] = await db
			.select({ count: count() })
			.from(bookings)
			.where(and(eq(bookings.userId, session.userId), eq(bookings.status, 'active')));

		// Get user's upcoming bookings (today and future)
		const [upcomingBookingsResult] = await db
			.select({ count: count() })
			.from(bookings)
			.where(
				and(eq(bookings.userId, session.userId), gte(bookings.date, todayStr), eq(bookings.status, 'active'))
			);

		return NextResponse.json({
			stats: {
				totalUsers: totalUsersResult.count,
				todayBookings: todayBookingsResult.count,
				activeCourts: activeCourtsResult.count,
				userBookings: userBookingsResult.count,
				upcomingBookings: upcomingBookingsResult.count,
			},
		});
	} catch (error) {
		console.error('Error fetching dashboard stats:', error);
		return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
	}
}