import path from 'node:path';
import { fileURLToPath } from 'node:url';
import dotenv from 'dotenv';
import { z } from 'zod';

const __dirname = path.dirname(fileURLToPath(import.meta.url));
// Load .env from the monorepo root regardless of cwd — but NEVER under test. The test suites
// inject their own env explicitly; loading a developer's/CI's real .env here makes tests
// non-hermetic (e.g. a real TURNSTILE_SECRET_KEY would switch on CAPTCHA and break auth tests).
if (process.env.NODE_ENV !== 'test') {
  dotenv.config({ path: path.resolve(__dirname, '../../../.env') });
}

const envSchema = z.object({
  NODE_ENV: z.enum(['development', 'production', 'test']).default('development'),
  PORT: z.coerce.number().int().positive().default(8080),
  PUBLIC_URL: z.string().url().default('http://localhost:8080'),
  COOKIE_DOMAIN: z.string().optional(),
  SESSION_SECRET: z.string().min(32),
  CSRF_SECRET: z.string().min(32),
  DATABASE_URL: z.string().min(1),
  DATABASE_CA_CERT_PATH: z.string().optional(),
  WEB_DIST_PATH: z.string().optional(),
  SUPERADMIN_EMAILS: z.string().optional().default(''),
  SENTRY_DSN_API: z.string().optional().default(''),
  // Object storage — DigitalOcean Spaces (S3-compatible), the platform's sole storage backend.
  // Required: the API must not boot into a state where uploads silently have nowhere to go.
  SPACES_ENDPOINT: z.string().url(),
  SPACES_REGION: z.string().min(1),
  SPACES_BUCKET: z.string().min(1),
  SPACES_KEY: z.string().min(1),
  SPACES_SECRET: z.string().min(1),
  SPACES_PUBLIC_BASE: z.string().optional().default(''),
  // Legacy local path — read only by the one-time migration script, not the running app.
  STORAGE_PATH: z.string().optional().default('./storage'),
  SMTP2GO_API_KEY: z.string().optional().default(''),
  ANTHROPIC_API_KEY: z.string().optional().default(''),
  TURNSTILE_SECRET_KEY: z.string().optional().default(''),
  EMAIL_FROM: z.string().optional().default('eLegal Software <noreply@elegalsoftware.com>'),
  STRIPE_SECRET_KEY: z.string().optional().default(''),
  STRIPE_WEBHOOK_SECRET: z.string().optional().default(''),
  STRIPE_PRICE_PRO: z.string().optional().default(''),
  STRIPE_PRICE_LIFETIME: z.string().optional().default(''),
});

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

// Production guard: Turnstile bot protection fails open when TURNSTILE_SECRET_KEY is unset
// (correct for dev/test, but in production a forgotten key silently disables all CAPTCHA/bot
// protection on signup/login/password-reset/contact). Fail fast at boot rather than run exposed.
if (parsed.NODE_ENV === 'production' && !parsed.TURNSTILE_SECRET_KEY) {
  throw new Error(
    'TURNSTILE_SECRET_KEY is required in production: without it, bot protection fails open and CAPTCHA verification is skipped entirely. Set TURNSTILE_SECRET_KEY in the environment.',
  );
}

export const env = {
  ...parsed,
  superadminEmails: parsed.SUPERADMIN_EMAILS.split(',')
    .map((s) => s.trim().toLowerCase())
    .filter(Boolean),
};

export const isProd = env.NODE_ENV === 'production';