import { NextRequest, NextResponse } from 'next/server';
import { getDBConnexion } from '../utils';

export const GET = async (req: NextRequest) => {
	const userID = req.headers.get('Authorization');

	if (!userID) {
		return NextResponse.json(
			{
				error: true,
				message: 'Unauthorized request',
			},
			{
				status: 403,
			}
		);
	}

	try {
		const pool = getDBConnexion();

		const { rows: userCount } = await pool.query(
			`SELECT * FROM "user" WHERE "id"=$1 LIMIT 1;`,
			[userID]
		);

		if (userCount.length != 1) {
			return NextResponse.json(
				{
					error: true,
					message: 'User not found',
				},
				{
					status: 404,
				}
			);
		}

		const { rows } = await pool.query(
			`
SELECT (
	SELECT AVG(entries)	
	FROM (
		SELECT COUNT(*) AS entries 
		FROM point 
		WHERE userid=$1
		GROUP BY date_part('year', createdat)
	)
) AS avgPerYear,
(
	SELECT AVG(entries)	
	FROM (
		SELECT COUNT(*) AS entries 
		FROM point 
		WHERE userid=$1
		GROUP BY date_part('year', createdat), date_part('month', createdat)
	)
) AS avgPerMonth,
(
	SELECT AVG(entries)	
	FROM (
		SELECT COUNT(*) AS entries 
		FROM point 
		WHERE userid=$1
		GROUP BY date_part('year', createdat), date_part('month', createdat), date_part('week', createdat)
	)
) AS avgPerWeek,
(
	SELECT COUNT(*)
	FROM point
	WHERE userid=$1
) AS total;`,
			[userID]
		);

		const result = {
			year: Math.round(parseFloat(rows[0].avgperyear)),
			month: Math.round(parseFloat(rows[0].avgpermonth)),
			week: Math.round(parseFloat(rows[0].avgperweek)),
			total: parseInt(rows[0].total),
		};

		await pool.end();
		return NextResponse.json(result, {
			status: 200,
		});
	} catch (error) {
		console.error(error);
		return NextResponse.json(
			{
				error: true,
				message: 'Internal error',
			},
			{
				status: 500,
			}
		);
	}
};