import { existsSync } from 'node:fs';
import path from 'node:path';
import dotenv from 'dotenv';

const projectEnvPath = path.resolve(process.cwd(), '.project-env');
const dotEnvPath = path.resolve(process.cwd(), '.env');

if (existsSync(projectEnvPath)) {
  dotenv.config({ path: projectEnvPath });
} else if (existsSync(dotEnvPath)) {
  dotenv.config({ path: dotEnvPath });
}

export const env = {
  nodeEnv: process.env.NODE_ENV ?? 'development',
  port: Number(process.env.PORT ?? 3000),
  databaseUrl: process.env.DATABASE_URL,
  sessionSecret: process.env.SESSION_SECRET ?? 'dev-only-change-me',
  publicBaseUrl: process.env.ACS_PUBLIC_BASE_URL ?? 'http://localhost:3000',
  smsProvider: process.env.ACS_SMS_PROVIDER ?? 'dev',
  smsApiUrl: process.env.ACS_SMS_API_URL,
  smsApiKey: process.env.ACS_SMS_API_KEY,
  smsSender: process.env.ACS_SMS_SENDER,
  smsTimeoutMs: Number(process.env.ACS_SMS_TIMEOUT_MS ?? 10000),
  mailHost: process.env.ACS_MAIL_HOST,
  mailPort: Number(process.env.ACS_MAIL_PORT ?? 25),
  mailFrom: process.env.ACS_MAIL_FROM,
  mailUsername: process.env.ACS_MAIL_USERNAME,
  mailPassword: process.env.ACS_MAIL_PASSWORD,
  mailSmtpAuth: (process.env.ACS_MAIL_SMTP_AUTH ?? '').toLowerCase() === 'true',
  mailStartTls: (process.env.ACS_MAIL_STARTTLS ?? '').toLowerCase() === 'true',
  mailTimeoutMs: Number(process.env.ACS_MAIL_TIMEOUT_MS ?? 10000),
  cookieSecure:
    (process.env.ACS_COOKIE_SECURE ?? '').toLowerCase() === 'true' ||
    (process.env.ACS_PUBLIC_BASE_URL ?? '').startsWith('https://'),
};

export function requireDatabaseUrl(): string {
  if (!env.databaseUrl) {
    throw new Error('DATABASE_URL is required. In AI DEV it should be supplied by .project-env.');
  }
  return env.databaseUrl;
}