import { logger } from "@creations.works/logger";

const environment: Environment = {
	port: Number.parseInt(process.env.PORT || "", 10),
	host: process.env.HOST || "0.0.0.0",
	development:
		process.env.NODE_ENV === "development" || process.argv.includes("--dev"),
};

const redisTtl: number = process.env.REDIS_TTL
	? Number.parseInt(process.env.REDIS_TTL, 10)
	: 60 * 60 * 1; // 1 hour

const cassandra: CassandraConfig = {
	host: process.env.CASSANDRA_HOST || "localhost",
	port: Number.parseInt(process.env.CASSANDRA_PORT || "9042", 10),
	keyspace: process.env.CASSANDRA_KEYSPACE || "void_db",
	username: process.env.CASSANDRA_USERNAME || "",
	password: process.env.CASSANDRA_PASSWORD || "",
	datacenter: process.env.CASSANDRA_DATACENTER || "",
	contactPoints: (process.env.CASSANDRA_CONTACT_POINTS || "localhost").split(
		",",
	),
	authEnabled: process.env.CASSANDRA_AUTH_ENABLED === "false",
};

const jwt: JWTConfig = {
	secret: process.env.JWT_SECRET || "",
	expiration: process.env.JWT_EXPIRATION || "1h",
	issuer: process.env.JWT_ISSUER || "",
	algorithm: process.env.JWT_ALGORITHM || "HS256",
};

function verifyRequiredVariables(): void {
	const requiredVariables = [
		"HOST",
		"PORT",

		"REDIS_URL",
		"REDIS_TTL",

		"CASSANDRA_HOST",
		"CASSANDRA_PORT",
		"CASSANDRA_CONTACT_POINTS",
		"CASSANDRA_AUTH_ENABLED",
		"CASSANDRA_DATACENTER",

		"JWT_SECRET",
		"JWT_EXPIRATION",
		"JWT_ISSUER",
	];

	let hasError = false;

	for (const key of requiredVariables) {
		const value = process.env[key];
		if (value === undefined || value.trim() === "") {
			logger.error(`Missing or empty environment variable: ${key}`);
			hasError = true;
		}
	}

	if (hasError) {
		process.exit(1);
	}
}

export { environment, cassandra, redisTtl, verifyRequiredVariables, jwt };