import process from 'node:process';
import { z } from 'zod';
import { App } from '../app';

export const RedisConfig = z.object({
	dsn: z.string().optional(),
	host: z.string().optional().default('127.0.0.1'),
	port: z.coerce.number().default(6379).catch(6379),
	username: z.string().optional(),
	password: z.string().optional(),
	db: z.coerce.number().default(0),
});
export type RedisConfig = z.infer<typeof RedisConfig>;

export function getRedisConfig(env = process.env) {
	let { REDIS_URL, REDIS_DSN = REDIS_URL, REDIS_HOST, REDIS_PORT, REDIS_USERNAME, REDIS_PASSWORD, REDIS_DB } = env;
	if (REDIS_DSN) {
		try {
			// redis, rediss
			const u = new URL(REDIS_DSN);
			REDIS_HOST ||= u.hostname;
			REDIS_PORT ||= u.port;
			REDIS_USERNAME ||= u.username;
			REDIS_PASSWORD ||= u.password;
		} catch {}
	}

	return RedisConfig.parse({
		dsn: REDIS_DSN,
		host: REDIS_HOST,
		port: REDIS_PORT,
		username: REDIS_USERNAME,
		password: REDIS_PASSWORD,
		db: REDIS_DB,
		/*
  connectTimeout: 10000,
  disconnectTimeout: 2000,
     */
	});
}

export function getRedisOptions() {
	// https://github.com/redis/ioredis/blob/main/lib/redis/RedisOptions.ts
	const { port, host, username, password, db } = getRedisConfig();
	return { port, host, username, password, db, connectionName: App.instanceId };
}