index.ts•1.89 kB
import 'dotenv/config';
import { z } from 'zod';
// Configuration schema validation
const ConfigSchema = z.object({
// API Configuration
geminiApiKey: z.string().min(1, 'GEMINI_API_KEY is required'),
// Server Configuration
logLevel: z.enum(['error', 'warn', 'info', 'debug']).default('info'),
enableMetrics: z.boolean().default(false),
// Rate Limiting
rateLimitEnabled: z.boolean().default(true),
rateLimitRequests: z.number().default(100),
rateLimitWindow: z.number().default(60000), // 1 minute
// Timeouts
requestTimeout: z.number().default(30000), // 30 seconds
// Development
isDevelopment: z.boolean().default(false)
});
export type Config = z.infer<typeof ConfigSchema>;
/**
* Load and validate configuration from environment variables
*/
export function loadConfig(): Config {
const rawConfig = {
geminiApiKey: process.env.GEMINI_API_KEY,
logLevel: process.env.LOG_LEVEL,
enableMetrics: process.env.ENABLE_METRICS === 'true',
rateLimitEnabled: process.env.RATE_LIMIT_ENABLED !== 'false',
rateLimitRequests: process.env.RATE_LIMIT_REQUESTS
? parseInt(process.env.RATE_LIMIT_REQUESTS, 10)
: undefined,
rateLimitWindow: process.env.RATE_LIMIT_WINDOW
? parseInt(process.env.RATE_LIMIT_WINDOW, 10)
: undefined,
requestTimeout: process.env.REQUEST_TIMEOUT
? parseInt(process.env.REQUEST_TIMEOUT, 10)
: undefined,
isDevelopment: process.env.NODE_ENV === 'development'
};
try {
return ConfigSchema.parse(rawConfig);
} catch (error) {
if (error instanceof z.ZodError) {
const issues = error.issues
.map(issue => `${issue.path.join('.')}: ${issue.message}`)
.join('\n');
throw new Error(`Configuration validation failed:\n${issues}`);
}
throw error;
}
}
// Export singleton config instance
export const config = loadConfig();