// /config/config.js

const dotenv = require('dotenv');
const path = require('path');

dotenv.config({ path: path.resolve(process.cwd(), '.env') });

const parseBool = (value, defaultValue) => {
  if (value === undefined || value === null || String(value).trim() === '') {
    return defaultValue;
  }
  const normalized = String(value).trim().toLowerCase();
  if (['true', '1', 'yes', 'on'].includes(normalized)) return true;
  if (['false', '0', 'no', 'off'].includes(normalized)) return false;
  return defaultValue;
};

const config = {
  NODE_ENV: process.env.NODE_ENV || 'development',
  PORT: parseInt(process.env.PORT, 10) || 3000,
  MONGO_URI: process.env.MONGO_URI || 'mongodb://localhost:27017/teaching_institution_db',
  
  JWT_ACCESS_SECRET: process.env.JWT_ACCESS_SECRET || 'default_super_secret_access_key_change_in_production',
  JWT_REFRESH_SECRET: process.env.JWT_REFRESH_SECRET || 'default_super_secret_refresh_key_change_in_production',
  JWT_ACCESS_EXPIRES_IN: process.env.JWT_ACCESS_EXPIRES_IN || '15m',
  JWT_REFRESH_EXPIRES_IN: process.env.JWT_REFRESH_EXPIRES_IN || '7d',
  
  CORS_ORIGIN: process.env.CORS_ORIGIN || '*',
  DEFAULT_LANG: process.env.DEFAULT_LANG || 'en',
  UPLOAD_PATH: process.env.UPLOAD_PATH || 'uploads',

  // S3-compatible storage (MinIO locally, SeaweedFS in production)
  // Accepts S3_* directly, or SeaweedFS/AWS service env aliases from the host platform.
  S3_ENDPOINT:
    process.env.S3_ENDPOINT
    || process.env.SERVICE_URL_S3
    || process.env.SERVICE_URL_S3_8333
    || 'http://localhost:9000',
  S3_REGION: process.env.S3_REGION || process.env.AWS_REGION || 'us-east-1',
  S3_ACCESS_KEY:
    process.env.S3_ACCESS_KEY
    || process.env.AWS_ACCESS_KEY_ID
    || process.env.SERVICE_USER_S3
    || 'minioadmin',
  S3_SECRET_KEY:
    process.env.S3_SECRET_KEY
    || process.env.AWS_SECRET_ACCESS_KEY
    || process.env.SERVICE_PASSWORD_S3
    || 'minioadmin',
  S3_TEMP_BUCKET: process.env.S3_TEMP_BUCKET || 'temp',
  // Legacy single storage bucket (kept as fallback)
  S3_STORAGE_BUCKET: process.env.S3_STORAGE_BUCKET || process.env.S3_CERTIFICATES_BUCKET || 'certificates',
  // Dedicated private buckets
  S3_CERTIFICATES_BUCKET: process.env.S3_CERTIFICATES_BUCKET || 'certificates',
  S3_DOCUMENTS_BUCKET: process.env.S3_DOCUMENTS_BUCKET || 'documents',
  S3_FORCE_PATH_STYLE: parseBool(
    process.env.S3_FORCE_PATH_STYLE,
    true // required for SeaweedFS / MinIO path-style
  ),
  SIGNED_URL_EXPIRES_IN: parseInt(process.env.SIGNED_URL_EXPIRES_IN, 10) || 900, // 15 minutes default
  // Public base URL for public buckets only (private buckets leave fileUrl empty)
  S3_PUBLIC_BASE_URL:
    process.env.S3_PUBLIC_BASE_URL
    || process.env.SERVICE_URL_S3
    || '',
  S3_CERTIFICATES_PUBLIC: parseBool(process.env.S3_CERTIFICATES_PUBLIC, false),
  S3_DOCUMENTS_PUBLIC: parseBool(process.env.S3_DOCUMENTS_PUBLIC, false),
  // SeaweedFS admin console (optional; not used by the S3 SDK client)
  SEAWEED_ADMIN_URL:
    process.env.SERVICE_URL_ADMIN_23646
    || process.env.SERVICE_URL_ADMIN
    || '',
  SEAWEED_USER_ADMIN: process.env.SEAWEED_USER_ADMIN || process.env.SERVICE_USER_ADMIN || '',
  SEAWEED_PASSWORD_ADMIN: process.env.SEAWEED_PASSWORD_ADMIN || process.env.SERVICE_PASSWORD_ADMIN || '',

  // SMTP Email Settings
  SMTP_HOST: process.env.SMTP_HOST || 'smtp.mailtrap.io',
  SMTP_PORT: parseInt(process.env.SMTP_PORT, 10) || 2525,
  SMTP_USER: process.env.SMTP_USER || '',
  SMTP_PASS: process.env.SMTP_PASS || '',
  EMAIL_FROM: process.env.EMAIL_FROM || 'no-reply@institution.com',

  // SMS Provider Settings (sms.ir)
  SMS_ENABLED: process.env.SMS_ENABLED || 'false',
  SMS_PANEL_TOKEN: process.env.SMS_PANEL_TOKEN || process.env.SMS_API_KEY || '',
  SMS_API_KEY: process.env.SMS_PANEL_TOKEN || process.env.SMS_API_KEY || 'mock_sms_key',
  SMS_SENDER_NUMBER: process.env.SMS_SENDER_NUMBER || '10001000',
  // Template IDs configured in the sms.ir panel
  SMS_TEMPLATE_ACCOUNT_CREATED: process.env.SMS_TEMPLATE_ACCOUNT_CREATED || '',
  SMS_TEMPLATE_CLASS_REGISTERED: process.env.SMS_TEMPLATE_CLASS_REGISTERED || '',
  SMS_TEMPLATE_CLASS_REMINDER: process.env.SMS_TEMPLATE_CLASS_REMINDER || '',

  // Bale Messenger Bot Settings
  BALE_BOT_TOKEN: process.env.BALE_BOT_TOKEN || 'mock_bale_bot_token',

  // SuperAdmin bootstrap (credentials come from env only; no hardcoded secrets)
  SUPERADMIN_ENABLED: parseBool(process.env.SUPERADMIN_ENABLED, true),
  SUPERADMIN_USERNAME: process.env.SUPERADMIN_USERNAME || '',
  SUPERADMIN_PASSWORD: process.env.SUPERADMIN_PASSWORD || '',
  SUPERADMIN_EMAIL: process.env.SUPERADMIN_EMAIL || '',
  SUPERADMIN_NATIONAL_ID: process.env.SUPERADMIN_NATIONAL_ID || '0000000000',
  SUPERADMIN_PHONE: process.env.SUPERADMIN_PHONE || '09000000000'
};

module.exports = config;