import { base } from '$app/paths';
import { BASE_API_URI } from '$lib/utils/constants';
import { formatError } from '$lib/utils/helpers';
import { fail, redirect } from '@sveltejs/kit';

/** @type {import('./$types').PageServerLoad} */
export async function load({ locals }) {
	// redirect user if logged in
	console.log('loading login page');
	if (locals.user) {
		console.log('user is logged in');
		throw redirect(302, `${base}/auth/about/${locals.user.id}`);
	}
}

/** @type {import('./$types').Actions} */
export const actions = {
	/**
	 *
	 * @param request - The request object
	 * @param fetch - Fetch object from sveltekit
	 * @param cookies - SvelteKit's cookie object
	 * @returns Error data or redirects user to the home page or the previous page
	 */
	login: async ({ request, fetch, cookies }) => {
		console.log('login action called');
		const data = await request.formData();
		const email = String(data.get('email'));
		const password = String(data.get('password'));
		const next = String(data.get('next'));
		/** @type {RequestInit} */
		const requestInitOptions = {
			method: 'POST',
			credentials: 'include',
			headers: {
				'Content-Type': 'application/json'
			},
			body: JSON.stringify({
				email: email,
				password: password
			})
		};
		console.log('API call url:', `${BASE_API_URI}/users/login`);
		const res = await fetch(`${BASE_API_URI}/users/login`, requestInitOptions);
		console.log('Login response status:', res.status);
		console.log('Login response headers:', Object.fromEntries(res.headers));

		if (!res.ok) {
			const errorData = await res.json();
			const errors = formatError(errorData.errors);
			return fail(res.status, { errors });
		}

		const responseBody = await res.json();
		console.log('Login response body:', responseBody);

		// Extract the JWT from the response headers
		const setCookieHeader = res.headers.get('set-cookie');
		if (setCookieHeader) {
			const jwtMatch = setCookieHeader.match(/jwt=([^;]+)/);
			if (jwtMatch) {
				const jwtValue = jwtMatch[1];
				// Set the cookie for the client
				cookies.set('jwt', jwtValue, {
					path: '/',
					httpOnly: true,
					secure: process.env.NODE_ENV === 'production', // Secure in production
					sameSite: 'lax',
					maxAge: 5 * 24 * 60 * 60 // 5 days in seconds
				});
			}
		}

		console.log('Redirecting to:', next || `${base}/auth/about/${responseBody.user_id}`);
		throw redirect(303, next || `${base}/auth/about/${responseBody.user_id}`);
	}
};