var debug  = require('debug')('pm2:conf');
var p      = require('path');
var util   = require('util');
var chalk  = require('chalk');
var semver = require('semver');

/**
 * Get PM2 path structure
 */
var path_structure = require('./paths.js')(process.env.OVER_HOME);

/**
 * Constants variables used by PM2
 */
var csts = {
  CODE_UNCAUGHTEXCEPTION  : 100,
  PREFIX_MSG              : chalk.green('[PM2] '),
  PREFIX_MSG_ERR          : chalk.red('[PM2][ERROR] '),
  PREFIX_MSG_MOD          : chalk.green('[PM2][Module] '),
  PREFIX_MSG_MOD_ERR      : chalk.red('[PM2][Module][ERROR] '),
  PREFIX_MSG_WARNING      : chalk.yellow('[PM2][WARN] '),
  PREFIX_MSG_SUCCESS      : chalk.cyan('[PM2] '),

  TEMPLATE_FOLDER         : p.join(__dirname, 'lib/templates'),

  APP_CONF_TPL            : 'ecosystem.tpl',
  SAMPLE_CONF_FILE        : 'sample-conf.js',
  CENTOS_STARTUP_SCRIPT   : 'pm2-init-centos.sh',
  UBUNTU_STARTUP_SCRIPT   : 'pm2-init.sh',
  SYSTEMD_STARTUP_SCRIPT  : 'pm2.service',
  AMAZON_STARTUP_SCRIPT   : 'pm2-init-amazon.sh',
  GENTOO_STARTUP_SCRIPT   : 'pm2',
  DARWIN_STARTUP_SCRIPT   : 'io.keymetrics.PM2.plist',
  FREEBSD_STARTUP_SCRIPT  : 'pm2-freebsd.sh',

  LOGROTATE_SCRIPT        : 'logrotate.d/pm2',

  SUCCESS_EXIT            : 0,
  ERROR_EXIT              : 1,

  IS_WINDOWS              : (process.platform === 'win32' || process.platform === 'win64'),
  ONLINE_STATUS           : 'online',
  STOPPED_STATUS          : 'stopped',
  STOPPING_STATUS         : 'stopping',
  LAUNCHING_STATUS        : 'launching',
  ERRORED_STATUS          : 'errored',
  ONE_LAUNCH_STATUS       : 'one-launch-status',

  CLUSTER_MODE_ID         : 'cluster_mode',
  FORK_MODE_ID            : 'fork_mode',

  KEYMETRICS_ROOT_URL     : process.env.KEYMETRICS_NODE || 'root.keymetrics.io',
  KEYMETRICS_BANNER       : '../lib/keymetrics',
  DEFAULT_MODULE_JSON     : 'package.json',

  REMOTE_PORT_TCP         : isNaN(parseInt(process.env.KEYMETRICS_PUSH_PORT)) ? 80 : parseInt(process.env.KEYMETRICS_PUSH_PORT),
  REMOTE_PORT             : 41624,
  REMOTE_REVERSE_PORT     : isNaN(parseInt(process.env.KEYMETRICS_REVERSE_PORT)) ? 43554 : parseInt(process.env.KEYMETRICS_REVERSE_PORT),
  REMOTE_HOST             : 's1.keymetrics.io',
  SEND_INTERVAL           : 1000,
  GRACEFUL_TIMEOUT        : parseInt(process.env.PM2_GRACEFUL_TIMEOUT) || 8000,
  GRACEFUL_LISTEN_TIMEOUT : parseInt(process.env.PM2_GRACEFUL_LISTEN_TIMEOUT) || 3000,

  // Concurrent actions when doing start/restart/reload
  CONCURRENT_ACTIONS      : (function() {
    var concurrent_actions = parseInt(process.env.PM2_CONCURRENT_ACTIONS) || 1;
    if (semver.satisfies(process.versions.node, '>= 4.0.0'))
      concurrent_actions = 4;
    debug('Using %d parallelism (CONCURRENT_ACTIONS)', concurrent_actions);
    return concurrent_actions;
  })(),

  DEBUG                   : process.env.PM2_DEBUG || false,
  WEB_INTERFACE           : parseInt(process.env.PM2_API_PORT)  || 9615,
  MODIFY_REQUIRE          : process.env.PM2_MODIFY_REQUIRE || false,

  WORKER_INTERVAL         : process.env.PM2_WORKER_INTERVAL || 30000,
  KILL_TIMEOUT            : process.env.PM2_KILL_TIMEOUT || 1600,

  PM2_LOG_DATE_FORMAT     : process.env.PM2_LOG_DATE_FORMAT !== undefined ? process.env.PM2_LOG_DATE_FORMAT : 'YYYY-MM-DD HH:mm:ss'

};

module.exports = util._extend(csts, path_structure);