/**
* Environment variable validation and configuration
*/
import { z } from 'zod';
import { DEFAULT_SITES } from './constants.js';
const EnvironmentSchema = z.object({
SERPAPI_KEY: z.string().min(1, 'SERPAPI_KEY is required'),
PORT: z.string().regex(/^\d+$/, 'PORT must be a number').optional(),
API_KEY: z.string().optional(),
SITE_FILTER: z.string().optional(),
NODE_ENV: z.enum(['development', 'production', 'test']).default('development')
});
type Environment = z.infer<typeof EnvironmentSchema>;
function requireEnv(key: string): string {
const value = process.env[key];
if (!value) {
throw new Error(`Environment variable ${key} is required`);
}
return value;
}
function parseCommaSeparated(value: string | undefined): string[] {
if (!value) return [];
return value.split(',').map(s => s.trim()).filter(Boolean);
}
function validateEnvironment(): Environment {
const result = EnvironmentSchema.safeParse(process.env);
if (!result.success) {
const errors = result.error.issues.map(issue =>
`${issue.path.join('.')}: ${issue.message}`
).join(', ');
throw new Error(`Environment validation failed: ${errors}`);
}
return result.data;
}
// Validate environment on import
const env = validateEnvironment();
export const config = {
serpApiKey: env.SERPAPI_KEY,
port: parseInt(env.PORT || '3000'),
apiKey: env.API_KEY || null,
siteFilter: parseCommaSeparated(env.SITE_FILTER),
nodeEnv: env.NODE_ENV,
// Computed values
get searchSites() {
return this.siteFilter.length > 0 ? this.siteFilter : DEFAULT_SITES;
},
get isDevelopment() {
return this.nodeEnv === 'development';
},
get isProduction() {
return this.nodeEnv === 'production';
},
get isTest() {
return this.nodeEnv === 'test';
}
} as const;
export type Config = typeof config;
