const { exec } = require('child_process');
const path = require('path');
const { dirname } = require('path');
const { File: HotReload } = require(`@services/hotReload.js`);
const { service } = require(`@root/server.js`);
const { localPath, cache, runtimeFile } = require('@root/globalize.js');


module.exports = startMenuItems = async function (app, objectGuid) {
  const debug = runtimeFile.configuration.live.debug.startMenuItems;
  let logContent = [];

  function safeClone(obj) {
    return JSON.parse(JSON.stringify(obj));
  }

  const log = (...args) => {
    if (debug) logContent.push(...args);
  };

  // =========================
  // Load menu sources
  // =========================
  const integratedStartmenuItems = runtimeFile.startMenuItems.live;

  const plugins = service
    .get('pluginManager')
    .getStatus()
    .map(({ config, ...plugin }) => ({
      ...safeClone(plugin),
      section: 'Plugin'
    }));

  let allPlugins = [...plugins, ...integratedStartmenuItems];

  // =========================
  // Load user permissions
  // =========================
  const rbacManager = service.get('rbacManager');
  const userPermissions = objectGuid === undefined ? [] : (await rbacManager.resolvePermissions(objectGuid))?.permissions;

  const normalizedPermissions = userPermissions.map(p => ({
    scope: p.scope,
    action: p.action,
    resource: p.resource || null
  }));


  // =========================
  // SUPER ADMIN CHECK
  // =========================
  const isSuperAdmin = normalizedPermissions.some(p =>
    p.scope === 'SYSTEM' &&
    p.resource === 'ALL' &&
    p.action === 'ALL'
  );

  log(`PERMISSIONS: ${JSON.stringify(normalizedPermissions)} - IS SUPER ADMIN: ${isSuperAdmin}`);

  // =========================
  // BUILD MENU
  // =========================
  for (const plugin of allPlugins) {

    plugin.menu.items = (plugin.menu.items || []).map(item => {

      const resource = item.label;
      const requiredPermissions = item.permissions || [];

      const debugTrace = [];

      const authorized = isSuperAdmin
        ? (debugTrace.push('SUPERADMIN OVERRIDE'), true)
        : normalizedPermissions.some(userPerm => {

            return requiredPermissions.some(required => {

              const scopeMatch =
                userPerm.scope === required.scope;

              const actionMatch =
                userPerm.action === 'ALL' ||
                userPerm.action === required.action ||
                required.action === 'ALL';

              const resourceMatch =
                !userPerm.resource ||
                userPerm.resource === 'ALL' ||
                userPerm.resource === resource;

              const result = scopeMatch && actionMatch && resourceMatch;

              if (debug) {
                debugTrace.push({
                  userPerm,
                  required,
                  scopeMatch,
                  actionMatch,
                  resourceMatch,
                  result
                });
              }

              return result;
            });
          });

      if (debug) {
        log(`\nMENU ITEM: ${item.label} - AUTHORIZED:', ${authorized} - TRACE:', ${debugTrace}`);
      }

      return {
        ...safeClone(item),
        authorized
      };
    });

    plugin.onlyAdministration =
      plugin.menu.items.every(i => !i.authorized);

    if (debug) {
      log(`PLUGIN: ${plugin.name} - VISIBLE:', ${!plugin.onlyAdministration}`);
    }
  }

  // =========================
  // FILTER FINAL MENU
  // =========================
  allPlugins = allPlugins
    .filter(p => !p.onlyAdministration)
    .filter(p => p.active);
  cache.startMenuItems = allPlugins;
  if(debug) {
      service.get('eventManager').writeLog(objectGuid, 0, 'StartMenuItems', logContent);
  }
  return allPlugins;
};


/**
 * Convert date into custom dateformat
  * @param {any} date - Valid date as datetype or string
  * @param {string} [format] - (optional) date characters are lowercase, time characters are uppercase; If is null, format will be "dd.mm.yyyy HH:MM:SS"
*/  
module.exports = dateFormat = function(date, format = null) {
  format = (format == null ? "dd.mm.yyyy HH:MM:SS" : format);
  const finish_date = new Date(date);

  return format
  .replace('yyyy', finish_date.getFullYear())
  .replace('yy', finish_date.getFullYear().toString().slice(-2))
  .replace('mm', ("0" + (finish_date.getMonth() + 1)).slice(-2))
  .replace('dd', ("0" + finish_date.getDate()).slice(-2))
  .replace('HH', ("0" + finish_date.getHours()).slice(-2))
  .replace('MM', ("0" + finish_date.getMinutes()).slice(-2))
  .replace('SS', ("0" + finish_date.getSeconds()).slice(-2));
}


/**
 * Limits the number of functions that can be executed in parallel.
 */
// module.exports = createLimiter = function(max) {
//   let active = 0;
//   const queue = [];

//   const runNext = () => {
//     if (active >= max || queue.length === 0) return;

//     active++;
//     const { fn, resolve, reject } = queue.shift();

//     fn()
//       .then(resolve)
//       .catch(reject)
//       .finally(() => {
//         active--;
//         runNext();
//       });
//   };

//   return fn =>
//     new Promise((resolve, reject) => {
//       queue.push({ fn, resolve, reject });
//       runNext();
//     });
// }



  
/**
 * try to call an existing host by name or ip adress
  * @param {string} hostname - Valid hostname or ip adress
  * @param {string} [format] - (optional) date characters are lowercase, time characters are uppercase; If is null, format will be "dd.mm.yyyy HH:MM:SS"
*/  
module.exports = ping = function(hostname, cbErr, cb, ttl = 1) {
  exec(`ping ${hostname} -c 1 -W ${ttl}`, function (err, stdout, stderr) {
    if(err) {
      cbErr(err);
    } else {
      cb(stdout);
    }
  });
}


module.exports = isObject = function(param) {
  return param !== null && typeof param === 'object' && !Array.isArray(param);
}