import { betterAuth } from 'better-auth/minimal';
import { drizzleAdapter } from 'better-auth/adapters/drizzle';
import { sveltekitCookies } from 'better-auth/svelte-kit';
import { env } from '$env/dynamic/private';
import { getRequestEvent } from '$app/server';
import { db } from '$lib/server/db';

function createAuth() {
	const origin = env.ORIGIN;
	if (!origin) throw new Error('ORIGIN is not set');
	const secret = env.BETTER_AUTH_SECRET;
	if (!secret) throw new Error('BETTER_AUTH_SECRET is not set');
	const clientId = env.GITHUB_CLIENT_ID;
	if (!clientId) throw new Error('GITHUB_CLIENT_ID is not set');
	const clientSecret = env.GITHUB_CLIENT_SECRET;
	if (!clientSecret) throw new Error('GITHUB_CLIENT_SECRET is not set');

	return betterAuth({
		baseURL: origin,
		secret,
		database: drizzleAdapter(db, { provider: 'pg' }),
		emailAndPassword: { enabled: true },
		socialProviders: {
			github: { clientId, clientSecret }
		},
		plugins: [
			sveltekitCookies(getRequestEvent)
		]
	});
}

let _auth: ReturnType<typeof betterAuth>;

export const auth = new Proxy({} as ReturnType<typeof betterAuth>, {
	get(target, prop) {
		if (!_auth) _auth = createAuth();
		return Reflect.get(_auth, prop, target);
	}
});