const utils = require('./utils'),
  fileHelper = require('./file_helper'),
  { PromoModes } = require('./constants');

// Canonical price key → Stripe price ID map (keyed by lookup_key / price key)
const _prices = {
  // Essential packages
  ess_1: process.env.ESS_1,
  ess_1_1: process.env.ESS_1_1,
  ess_2: process.env.ESS_2,
  ess_3: process.env.ESS_3,
  ess_4: process.env.ESS_4,
  ess_5: process.env.ESS_5,
  // Enterprise packages
  ent_1: process.env.ENT_1,
  ent_2: process.env.ENT_2,
  ent_3: process.env.ENT_3,
  ent_4: process.env.ENT_4,
  addon_1: process.env.ADDON_1
};

// Inverted map: Stripe price ID → price key (for reverse lookups)
const _priceMap = Object.entries(_prices).reduce((m, [key, id]) => {
  if (id) m[id] = key;
  return m;
}, {});

// Normalize production flag once to avoid repeated parsing
const IS_PROD = utils.stringToBoolean(process.env.PRODUCTION) || false;

const getQueueName = (queueName, defaultName) => {
  const baseQueue = process.env[queueName] || defaultName;
  return IS_PROD ? baseQueue : `dev_${baseQueue}`;
};


module.exports = {
  HTTP2_ENABLED: utils.stringToBoolean(process.env.HTTP2_ENABLED) || false,
  HTTP2_ADVERTISE_H2: utils.stringToBoolean(process.env.HTTP2_ADVERTISE_H2) || false,
  FATAL_REPORT_ENABLED: utils.stringToBoolean(process.env.FATAL_REPORT_ENABLED) || false,
  FATAL_REPORT_FILE: fileHelper.getAppPath(process.env.FATAL_REPORT_FILE || './agm_server.rlog'),
  FATAL_REPORT_EMAIL_ENABLED: utils.stringToBoolean(process.env.FATAL_REPORT_EMAIL_ENABLED) || false,
  FATAL_REPORT_EMAIL_TO: process.env.FATAL_REPORT_EMAIL_TO,
  FATAL_EXIT_ON_ERROR: utils.stringToBoolean(process.env.FATAL_EXIT_ON_ERROR) ?? true,
  FATAL_EXIT_DELAY_MS: Number(process.env.FATAL_EXIT_DELAY_MS) || 1500,
  FATAL_THROTTLE_MS: Number(process.env.FATAL_THROTTLE_MS) || 2 * 60 * 1000,
  AGM_PORT: process.env.AGM_PORT,
  PRODUCTION: IS_PROD,
  DEBUG: process.env.DEBUG,
  LOG_ALL_ERRORS: utils.stringToBoolean(process.env.LOG_ALL_ERRORS) || false,
  MAX_REQ_BDY_MB: process.env.MAX_REQ_BDY_MB,
  MAX_UPLOAD_SIZE_MB: process.env.MAX_UPLOAD_SIZE_MB,
  MAX_UPLOAD_FILES: process.env.MAX_UPLOAD_FILES,
  MAX_SESSION_SECS: process.env.MAX_SESSION_SECS || 3600 * 8,

  // Cursor-based pagination configuration
  PAGINATION_DEFAULT_LIMIT: Number(process.env.PAGINATION_DEFAULT_LIMIT) || 1000,
  PAGINATION_MAX_LIMIT: Number(process.env.PAGINATION_MAX_LIMIT) || 14000,

  NO_EMAIL_MODE: utils.stringToBoolean(process.env.NO_EMAIL_MODE) || false,

  // Make sure and safe to force minimum 13 months to archive jobs
  ARCHIVE_JOBS_DAYS: Math.max((+process.env.ARCHIVE_JOBS_DAYS || 365) + 31, 365 + 31),

  TOKEN_SECRET: process.env.TOKEN_SECRET,
  PWD_RESET_VALID_HRS: process.env.PWD_RESET_VALID_HRS || '3h',

  APP_RATE_MINS: Number(process.env.APP_RATE_MINS) || 5,
  APP_RATE_REQS: Number(process.env.APP_RATE_REQS) || 200,
  APP_RATE_SKIPFAIL: utils.stringToBoolean(process.env.APP_RATE_SKIPFAIL),
  // true: trust all proxies, ['ip address', 'other ip address'] or number: number of proxies between user and server
  APP_RATE_TRUST_PROXIES: Number(process.env.APP_RATE_TRUST_PROXIES) || 1,

  // Make APP_URL default to prod host or local dev
  APP_URL: IS_PROD ? (process.env.APP_URL || 'https://agmission.agnav.com') : (process.env.APP_URL || 'http://localhost:4200'),

  UPLOAD_DIR: fileHelper.getAppPath(process.env.UPLOAD_DIR),
  UNZIP_DIR: fileHelper.getAppPath(process.env.UNZIP_DIR),
  REPORT_DIR: fileHelper.getAppPath(process.env.REPORT_DIR),
  TEMP_DIR: fileHelper.getAppPath(process.env.TEMP_DIR),

  SSL_KEY: process.env.SSL_KEY,
  SSL_CERT: process.env.SSL_CERT,

  CAPTCHA_SITESEC: process.env.CAPTCHA_SITESEC,

  ENABLE_SUBSCRIPTION: utils.stringToBoolean(process.env.ENABLE_SUBSCRIPTION) || false,
  // Stripe
  STRIPE_SEC_KEY: process.env.STRIPE_SEC_KEY,
  STRIPE_PUB_KEY: process.env.STRIPE_PUB_KEY,
  STRIPE_WH_SEC: process.env.STRIPE_WH_SEC,
  STRIPE_API_VERSION: process.env.STRIPE_API_VERSION,
  PRICES: _prices,
  // Inverted map: Stripe price ID → price key (lookup_key)
  PRICE_MAP: _priceMap,
  AGN_BILL_MGT_EMAIL: process.env.AGN_BILL_MGT_EMAIL,
  AGM_ADM_EMAIL: process.env.AGM_ADM_EMAIL,
  NEW_ACC_TRIAL_DAYS: process.env.NEW_ACC_TRIAL_DAYS || 30,
  NEW_ACC_VALID_TIME: process.env.NEW_ACC_VALID_TIME || '3d',
  EMAIL_VER_VALID_TIME: process.env.EMAIL_VER_VALID_TIME || '4h',

  // DB connection info  
  DB_HOSTS: process.env.DB_HOSTS,
  DB_NAME: process.env.DB_NAME,
  DB_USR: process.env.DB_USR,
  DB_PWD: process.env.DB_PWD,
  DB_AUTH_SOURCE: process.env.DB_AUTH_SOURCE,
  DB_REPLSET: process.env.DB_REPLSET,
  DB_MAX_POOLSIZE: process.env.DB_MAX_POOLSIZE,
  DB_USE_TLS: utils.stringToBoolean(process.env.DB_USE_TLS),
  DB_TLS_CA_FILE: process.env.DB_TLS_CA_FILE,
  DB_TLS_CERT_FILE: process.env.DB_TLS_CERT_FILE,
  DB_USE_X509: utils.stringToBoolean(process.env.DB_USE_X509),
  DB_DISABLE_HOSTNAME_VERIFY: utils.stringToBoolean(process.env.DB_DISABLE_HOSTNAME_VERIFY),
  // Allow disabling SSL validation - not recommended but sometimes needed for self-signed certs
  DB_DISABLE_SSL_VALIDATE: utils.stringToBoolean(process.env.DB_DISABLE_SSL_VALIDATE),
  // New parameter to identify ScaleGrid hosting
  DB_USE_SCALEGRID: utils.stringToBoolean(process.env.DB_USE_SCALEGRID) || false,

  // For RabbitMq queue client
  QUEUE_PORT: process.env.QUEUE_PORT,
  QUEUE_HOST: process.env.QUEUE_HOST,
  QUEUE_USR: process.env.QUEUE_USR,
  QUEUE_PWD: process.env.QUEUE_PWD,
  QUEUE_VHOST: process.env.QUEUE_VHOST,
  QUEUE_NAME_JOBS: getQueueName(process.env.QUEUE_NAME_JOBS, 'jobs'),
  QUEUE_HEARTBEAT: Number(process.env.QUEUE_HEARTBEAT),
  // Partner queue name with automatic dev/prod prefix
  QUEUE_NAME_PARTNER: getQueueName(process.env.QUEUE_NAME_PARTNER, 'partner_tasks'),

  REDIS_PWD: process.env.REDIS_PWD,
  JOBS_CACHE_TTL: Number(process.env.JOBS_CACHE_TTL) || 60, // seconds; set to 0 to disable

  SMTP_HOST: process.env.SMTP_HOST,
  SMTP_PORT: process.env.SMTP_PORT,
  SMTP_SECURE: process.env.SMTP_SECURE,
  SMTP_USR: process.env.SMTP_USR,
  SMTP_PWD: process.env.SMTP_PWD,

  INV_IMG_VIR_DIR: process.env.INV_IMG_VIR_DIR ?? '/uploads/invoice_settings',
  INV_UPLOAD_DIR: fileHelper.getAppPath(process.env.INV_UPLOAD_DIR ?? './uploads/invoice_settings'),

  INV_MAX_UPLOAD_SIZE_MB: process.env.INV_MAX_UPLOAD_SIZE_MB || 5,
  INV_PROCESS_LIMIT: Number(process.env.INV_PROCESS_LIMIT || 100),
  INV_OVERPAID_THRESHOLD: Math.max(1, Number(process.env.INV_OVERPAID_THRESHOLD || 5)),
  INV_MAX_OVERDUE_DAYS: Number(process.env.INV_MAX_OVERDUE_DAYS || 30),

  // For Obstacle worker
  FAA_DOF_URL: process.env.FAA_DOF_URL || 'https://www.faa.gov/air_traffic/flight_info/aeronav/digital_products/dof/',
  AREAS_UPLOAD_DIR: fileHelper.getAppPath(process.env.AREAS_UPLOAD_DIR ?? './uploads/areas'),

  // Partner System Configuration Settings  
  PARTNER_SYNC_INTERVAL: Number(process.env.PARTNER_SYNC_INTERVAL) || 300000, // 5 minutes
  PARTNER_HEALTH_CHECK_INTERVAL: Number(process.env.PARTNER_HEALTH_CHECK_INTERVAL) || 60000, // 1 minute
  PARTNER_MAX_CONCURRENT_JOBS: Number(process.env.PARTNER_MAX_CONCURRENT_JOBS) || 10,
  PARTNER_ENCRYPT_CREDENTIALS: utils.stringToBoolean(process.env.PARTNER_ENCRYPT_CREDENTIALS) || true,
  PARTNER_JOB_TIMEOUT: process.env.PARTNER_JOB_TIMEOUT,
  PARTNER_METRICS_ENABLED: process.env.PARTNER_METRICS_ENABLED,
  PARTNER_DETAILED_LOGGING: process.env.PARTNER_DETAILED_LOGGING,
  PARTNER_MAX_RETRIES: Number(process.env.PARTNER_MAX_RETRIES || process.env.AGM_MAX_RETRIES || 5),

  // SatLoc Configuration (Customer-specific credentials in PartnerSystemUser records)
  SATLOC_API_ENDPOINT: process.env.SATLOC_API_ENDPOINT || 'https://www.satloccloudfc.com/api/Satloc',
  SATLOC_API_KEY: process.env.SATLOC_API_KEY,
  SATLOC_API_SECRET: process.env.SATLOC_API_SECRET,
  SATLOC_API_TIMEOUT: process.env.SATLOC_API_TIMEOUT,
  SATLOC_RETRY_ATTEMPTS: process.env.SATLOC_RETRY_ATTEMPTS,
  SATLOC_RETRY_DELAY: process.env.SATLOC_RETRY_DELAY,
  SATLOC_RATE_LIMIT: process.env.SATLOC_RATE_LIMIT,
  SATLOC_BURST_LIMIT: process.env.SATLOC_BURST_LIMIT,
  SATLOC_REALTIME_ENABLED: process.env.SATLOC_REALTIME_ENABLED,
  SATLOC_FILE_UPLOAD_ENABLED: process.env.SATLOC_FILE_UPLOAD_ENABLED,
  SATLOC_MAX_FILE_SIZE: process.env.SATLOC_MAX_FILE_SIZE,
  SATLOC_STORAGE_PATH: process.env.SATLOC_STORAGE_PATH,
  SATLOC_MAX_POSITIONS_PER_JOB: process.env.SATLOC_MAX_POSITIONS_PER_JOB ? parseInt(process.env.SATLOC_MAX_POSITIONS_PER_JOB, 10) : undefined,
  SATLOC_1ST_ASSIGNMENT_ALWAYS_MATCH: utils.stringToBoolean(process.env.SATLOC_1ST_ASSIGNMENT_ALWAYS_MATCH) || false,

  // AgIDronex Configuration (for future expansion)
  AGIDRONEX_API_ENDPOINT: process.env.AGIDRONEX_API_ENDPOINT,
  AGIDRONEX_API_KEY: process.env.AGIDRONEX_API_KEY,
  AGIDRONEX_API_SECRET: process.env.AGIDRONEX_API_SECRET,
  AGIDRONEX_API_TIMEOUT: process.env.AGIDRONEX_API_TIMEOUT,
  AGIDRONEX_RETRY_ATTEMPTS: process.env.AGIDRONEX_RETRY_ATTEMPTS,
  AGIDRONEX_RETRY_DELAY: process.env.AGIDRONEX_RETRY_DELAY,
  AGIDRONEX_RATE_LIMIT: process.env.AGIDRONEX_RATE_LIMIT,
  AGIDRONEX_BURST_LIMIT: process.env.AGIDRONEX_BURST_LIMIT,
  AGIDRONEX_REALTIME_ENABLED: process.env.AGIDRONEX_REALTIME_ENABLED,
  AGIDRONEX_FILE_UPLOAD_ENABLED: process.env.AGIDRONEX_FILE_UPLOAD_ENABLED,
  AGIDRONEX_MAX_FILE_SIZE: process.env.AGIDRONEX_MAX_FILE_SIZE,

  PROMO_MIN_EXPIRY_DAYS: Number(process.env.PROMO_MIN_EXPIRY_DAYS) || 3,
  // Days before a promo schedule phase ends to send the advance expiry warning email (0 = disabled)
  PROMO_EXPIRY_WARNING_DAYS: Number(process.env.PROMO_EXPIRY_WARNING_DAYS) || 15,
  // Promotion mode (global kill switch for all promo applications)
  // 'enabled' (DEFAULT) - Promotions enabled (targeting controlled by PromoEligibility)
  // 'disabled' - Never apply promotions (kill switch OFF)
  // Affects: /update, /retrieveNextInvoices, /activePromos endpoints
  PROMO_MODE: process.env.PROMO_MODE || PromoModes.ENABLED,

  // Dead Letter Queue (DLQ) Configuration
  DLQ_RETENTION_DAYS: Number(process.env.DLQ_RETENTION_DAYS) || 365, // How long to keep messages in DLQ before auto-archive
  DLQ_ARCHIVE_PATH: fileHelper.getAppPath(process.env.DLQ_ARCHIVE_PATH || './dlq_archives'), // Where to store archived DLQ messages
  DLQ_ALERT_ENABLED: utils.stringToBoolean(process.env.DLQ_ALERT_ENABLED) ?? true, // Send admin alerts for DLQ buildup
  DLQ_ALERT_THRESHOLD: Number(process.env.DLQ_ALERT_THRESHOLD) || 20, // Warning threshold for DLQ message count
  DLQ_ALERT_CRITICAL: Number(process.env.DLQ_ALERT_CRITICAL) || 50, // Critical threshold for DLQ message count
  DLQ_ALERT_INTERVAL_MS: Number(process.env.DLQ_ALERT_INTERVAL_MS) || 300000, // Check interval (5 minutes)
  DLQ_CONSUMER_ENABLED: utils.stringToBoolean(process.env.DLQ_CONSUMER_ENABLED) || false // Enable DLQ consumer (manual control)
}