import { z } from 'zod';

const envSchema = z.object({
  NODE_ENV: z.enum(['development', 'test', 'production']).default('development'),
  DATABASE_URL: z.string().url(),
  REDIS_URL: z.string().url(),
  API_PORT: z.coerce.number().default(3001),
  JWT_SECRET: z.string().min(32),
  MEILI_URL: z.string().url().default('http://localhost:7700'),
  MEILI_MASTER_KEY: z.string().default('tower_meili_dev_key'),
  LOG_LEVEL: z.enum(['trace', 'debug', 'info', 'warn', 'error']).default('info'),
  WHATSAPP_SESSION_PATH: z.string().default('./sessions'),
  TOWER_PORTAL_BASE_URL: z.string().url().default('http://localhost:3000'),
  BCRYPT_ROUNDS: z.coerce.number().int().min(4).max(15).default(10),
  JWT_EXPIRES_IN: z.string().default('7d'),
  MEMBER_JWT_EXPIRES_IN: z.string().default('30d'),
  OPENROUTER_API_KEY: z.string().optional(),
  AI_STREAM_TOKEN: z.string().optional(),
});

export type Env = z.infer<typeof envSchema>;

export function validateEnv(env: NodeJS.ProcessEnv = process.env): Env {
  const result = envSchema.safeParse(env);
  if (!result.success) {
    console.error('Invalid environment variables:', result.error.format());
    throw new Error('Invalid environment variables');
  }
  return result.data;
}