import { z } from 'zod/v4';
const envSchema = z.object({
PORT: z.coerce.number().int().positive().default(1453),
HOST: z.string().min(1).default('127.0.0.1'),
CORS_ORIGIN: z.string().min(1).default('*'),
SESSION_TTL_MS: z.coerce
.number()
.int()
.positive()
.default(30 * 60 * 1000),
CLEANUP_INTERVAL_MS: z.coerce
.number()
.int()
.positive()
.default(60 * 1000),
EVENT_MAX_AGE_MS: z.coerce
.number()
.int()
.positive()
.default(24 * 60 * 60 * 1000),
EVENT_MAX_COUNT: z.coerce.number().int().positive().default(5000),
ALLOWED_HOSTS: z.string().optional(),
});
export interface AppConfig {
port: number;
host: string;
corsOrigin: string;
sessionTtlMs: number;
cleanupIntervalMs: number;
eventMaxAgeMs: number;
eventMaxCount: number;
allowedHosts?: string[];
}
function parseAllowedHosts(raw: string | undefined): string[] | undefined {
if (!raw) {
return undefined;
}
const values = raw
.split(',')
.map((value) => value.trim())
.filter(Boolean);
return values.length > 0 ? values : undefined;
}
export function loadConfig(env: NodeJS.ProcessEnv = process.env): AppConfig {
const parsed = envSchema.parse(env);
const allowedHosts = parseAllowedHosts(parsed.ALLOWED_HOSTS);
return {
port: parsed.PORT,
host: parsed.HOST,
corsOrigin: parsed.CORS_ORIGIN,
sessionTtlMs: parsed.SESSION_TTL_MS,
cleanupIntervalMs: parsed.CLEANUP_INTERVAL_MS,
eventMaxAgeMs: parsed.EVENT_MAX_AGE_MS,
eventMaxCount: parsed.EVENT_MAX_COUNT,
...(allowedHosts ? { allowedHosts } : {}),
};
}
