/**
 * Environment variable validation — runs at startup.
 * Throws if any required variable is missing.
 */

const required = [
  "DATABASE_URL",
  "NEXTAUTH_URL",
  "NEXTAUTH_SECRET",
  "NEXT_PUBLIC_CLOUDINARY_CLOUD_NAME",
  "CLOUDINARY_API_KEY",
  "CLOUDINARY_API_SECRET",
] as const

export function validateEnv() {
  const missing = required.filter((key) => !process.env[key])
  if (missing.length > 0) {
    throw new Error(
      `Missing required environment variables:\n${missing.map((k) => `  - ${k}`).join("\n")}\n\nCheck your .env.local file.`
    )
  }
}