import 'dotenv/config'
import { z } from 'zod'

const envSchema = z.object({
  NODE_ENV: z.enum(['development', 'production', 'test']).default('development'),
  PORT: z.coerce.number().int().min(1).max(65535).default(3500),
  DATABASE_URL: z.string().min(1, 'DATABASE_URL es obligatoria'),
  CORS_ORIGINS: z.string().default(''),
  JWT_SECRET: z
    .string()
    .min(32, 'JWT_SECRET debe tener al menos 32 caracteres. Genera uno con: node -e "console.log(require(\'crypto\').randomBytes(64).toString(\'hex\'))"'),
  JWT_ACCESS_EXPIRES: z.string().default('15m'),
  JWT_REFRESH_EXPIRES: z.string().default('7d'),
})

export type Env = z.infer<typeof envSchema>

let _env: Env | undefined

export function getEnv(): Env {
  if (_env) return _env
  const result = envSchema.safeParse(process.env)
  if (!result.success) {
    const issues = result.error.issues.map((i) => `  • ${i.path.join('.')}: ${i.message}`).join('\n')
    throw new Error(`Variables de entorno inválidas:\n${issues}`)
  }
  _env = result.data
  return _env
}