import { z } from 'zod';

const envSchema = z.object({
  NODE_ENV: z.enum(['development', 'production', 'test']).default('development'),
  PORT: z.string().default('4000'),
  DATABASE_URL: z.string(),
  REDIS_URL: z.string().default('redis://localhost:6379'),
  JWT_SECRET: z.string().min(32),
  JWT_REFRESH_SECRET: z.string().min(32),
  JWT_ACCESS_EXPIRY: z.string().default('15m'),
  JWT_REFRESH_EXPIRY: z.string().default('7d'),
  AI_SERVICE_URL: z.string().default('http://localhost:8000'),
  AI_SERVICE_KEY: z.string().default('internal-dev-key'),
  AWS_REGION: z.string().default('us-east-1'),
  S3_BUCKET_NAME: z.string().default('hr-resumes'),
  S3_ENDPOINT: z.string().optional(),
  OPENAI_API_KEY: z.string().optional(),
  GOOGLE_CLIENT_ID: z.string().optional(),
  GOOGLE_CLIENT_SECRET: z.string().optional(),
});

const parsed = envSchema.safeParse(process.env);

if (!parsed.success) {
  console.error('Invalid environment variables:', parsed.error.format());
  process.exit(1);
}

export const config = parsed.data;