'use strict';
// @ts-check
// ==================================================================================
// index.js
// ----------------------------------------------------------------------------------
// Description:   System Information - library
//                for Node.js
// Copyright:     (c) 2014 - 2020
// Author:        Sebastian Hildebrandt
// ----------------------------------------------------------------------------------
// Contributors:  Guillaume Legrain (https://github.com/glegrain)
//                Riccardo Novaglia (https://github.com/richy24)
//                Quentin Busuttil (https://github.com/Buzut)
//                Lapsio (https://github.com/lapsio)
//                csy (https://github.com/csy1983)
// ----------------------------------------------------------------------------------
// License:       MIT
// ==================================================================================

// ----------------------------------------------------------------------------------
// Dependencies
// ----------------------------------------------------------------------------------

const lib_version = require('../package.json').version;
const util = require('./util');
const system = require('./system');
const osInfo = require('./osinfo');
const cpu = require('./cpu');
const memory = require('./memory');
const battery = require('./battery');
const graphics = require('./graphics');
const filesystem = require('./filesystem');
const network = require('./network');
const wifi = require('./wifi');
const processes = require('./processes');
const users = require('./users');
const internet = require('./internet');
const docker = require('./docker');
const vbox = require('./virtualbox');

let _platform = process.platform;
const _windows = (_platform === 'win32');
const _freebsd = (_platform === 'freebsd');
const _openbsd = (_platform === 'openbsd');
const _netbsd = (_platform === 'netbsd');
const _sunos = (_platform === 'sunos');

// ----------------------------------------------------------------------------------
// init
// ----------------------------------------------------------------------------------

if (_windows) {
  util.getCodepage();
}

// ----------------------------------------------------------------------------------
// General
// ----------------------------------------------------------------------------------

function version() {
  return lib_version;
}

// ----------------------------------------------------------------------------------
// Get static and dynamic data (all)
// ----------------------------------------------------------------------------------

// --------------------------
// get static data - they should not change until restarted

function getStaticData(callback) {

  return new Promise((resolve) => {
    process.nextTick(() => {

      let data = {};

      data.version = version();

      Promise.all([
        system.system(),
        system.bios(),
        system.baseboard(),
        system.chassis(),
        osInfo.osInfo(),
        osInfo.uuid(),
        osInfo.versions(),
        cpu.cpu(),
        cpu.cpuFlags(),
        graphics.graphics(),
        network.networkInterfaces(),
        memory.memLayout(),
        filesystem.diskLayout()
      ]).then(res => {
        data.system = res[0];
        data.bios = res[1];
        data.baseboard = res[2];
        data.chassis = res[3];
        data.os = res[4];
        data.uuid = res[5];
        data.versions = res[6];
        data.cpu = res[7];
        data.cpu.flags = res[8];
        data.graphics = res[9];
        data.net = res[10];
        data.memLayout = res[11];
        data.diskLayout = res[12];
        if (callback) { callback(data); }
        resolve(data);
      });
    });
  });
}


// --------------------------
// get all dynamic data - e.g. for monitoring agents
// may take some seconds to get all data
// --------------------------
// 2 additional parameters needed
// - srv: 		comma separated list of services to monitor e.g. "mysql, apache, postgresql"
// - iface:	define network interface for which you like to monitor network speed e.g. "eth0"

function getDynamicData(srv, iface, callback) {

  if (util.isFunction(iface)) {
    callback = iface;
    iface = '';
  }
  if (util.isFunction(srv)) {
    callback = srv;
    srv = '';
  }

  return new Promise((resolve) => {
    process.nextTick(() => {

      iface = iface || network.getDefaultNetworkInterface();
      srv = srv || '';

      // use closure to track ƒ completion
      let functionProcessed = (function () {
        let totalFunctions = 15;
        if (_windows) totalFunctions = 11;
        if (_freebsd || _openbsd || _netbsd) totalFunctions = 11;
        if (_sunos) totalFunctions = 6;

        return function () {
          if (--totalFunctions === 0) {
            if (callback) {
              callback(data);
            }
            resolve(data);
          }
        };
      })();

      // var totalFunctions = 14;
      // function functionProcessed() {
      //   if (--totalFunctions === 0) {
      //     if (callback) { callback(data) }
      //     resolve(data);
      //   }
      // }

      let data = {};

      // get time
      data.time = osInfo.time();

      /**
       * @namespace
       * @property {Object}  versions
       * @property {string}  versions.node
       * @property {string}  versions.v8
       */
      data.node = process.versions.node;
      data.v8 = process.versions.v8;

      cpu.cpuCurrentspeed().then(res => {
        data.cpuCurrentspeed = res;
        functionProcessed();
      });

      users.users().then(res => {
        data.users = res;
        functionProcessed();
      });

      if (!_windows) {
        processes.processes().then(res => {
          data.processes = res;
          functionProcessed();
        });
      }

      cpu.currentLoad().then(res => {
        data.currentLoad = res;
        functionProcessed();
      });

      if (!_sunos) {
        cpu.cpuTemperature().then(res => {
          data.temp = res;
          functionProcessed();
        });
      }

      if (!_openbsd && !_freebsd && !_netbsd && !_sunos) {
        network.networkStats(iface).then(res => {
          data.networkStats = res;
          functionProcessed();
        });
      }

      if (!_sunos) {
        network.networkConnections().then(res => {
          data.networkConnections = res;
          functionProcessed();
        });
      }

      memory.mem().then(res => {
        data.mem = res;
        functionProcessed();
      });

      if (!_sunos) {
        battery().then(res => {
          data.battery = res;
          functionProcessed();
        });
      }

      if (!_windows && !_sunos) {
        processes.services(srv).then(res => {
          data.services = res;
          functionProcessed();
        });
      }

      if (!_sunos) {
        filesystem.fsSize().then(res => {
          data.fsSize = res;
          functionProcessed();
        });
      }

      if (!_windows && !_openbsd && !_freebsd && !_netbsd && !_sunos) {
        filesystem.fsStats().then(res => {
          data.fsStats = res;
          functionProcessed();
        });
      }

      if (!_windows && !_openbsd && !_freebsd && !_netbsd && !_sunos) {
        filesystem.disksIO().then(res => {
          data.disksIO = res;
          functionProcessed();
        });
      }

      if (!_openbsd && !_freebsd && !_netbsd && !_sunos) {
        wifi.wifiNetworks().then(res => {
          data.wifiNetworks = res;
          functionProcessed();
        });
      }

      internet.inetLatency().then(res => {
        data.inetLatency = res;
        functionProcessed();
      });
    });
  });
}

// --------------------------
// get all data at once
// --------------------------
// 2 additional parameters needed
// - srv: 		comma separated list of services to monitor e.g. "mysql, apache, postgresql"
// - iface:	define network interface for which you like to monitor network speed e.g. "eth0"

function getAllData(srv, iface, callback) {

  return new Promise((resolve) => {
    process.nextTick(() => {
      let data = {};

      if (iface && util.isFunction(iface) && !callback) {
        callback = iface;
        iface = '';
      }

      if (srv && util.isFunction(srv) && !iface && !callback) {
        callback = srv;
        srv = '';
        iface = '';
      }

      getStaticData().then(res => {
        data = res;
        getDynamicData(srv, iface).then(res => {
          for (let key in res) {
            if ({}.hasOwnProperty.call(res, key)) {
              data[key] = res[key];
            }
          }
          if (callback) { callback(data); }
          resolve(data);
        });
      });
    });
  });
}

function get(valueObject, callback) {
  return new Promise((resolve) => {
    process.nextTick(() => {
      const allPromises = Object.keys(valueObject)
        .filter(func => ({}.hasOwnProperty.call(exports, func)))
        .map(func => {
          const params = valueObject[func].substring(valueObject[func].lastIndexOf('(') + 1, valueObject[func].lastIndexOf(')'));
          const funcWithoutParams = func.split('(')[0];
          if (params) {
            return exports[funcWithoutParams](params)
          } else {
            return exports[funcWithoutParams]('')
          }
        });

      Promise.all(allPromises).then(data => {
        const result = {};
        let i = 0;
        for (let key in valueObject) {
          if ({}.hasOwnProperty.call(valueObject, key) && {}.hasOwnProperty.call(exports, key) && data.length > i) {
            if (valueObject[key] === '*' || valueObject[key] === 'all') {
              result[key] = data[i];
            } else {
              const keys = valueObject[key].replace(/,/g, ' ').replace(/ +/g, ' ').split(' ');
              if (data[i]) {
                if (Array.isArray(data[i])) {
                  // result is in an array, go through all elements of array and pick only the right ones
                  const partialArray = [];
                  data[i].forEach(element => {
                    const partialRes = {};
                    keys.forEach(k => {
                      if ({}.hasOwnProperty.call(element, k)) {
                        partialRes[k] = element[k];
                      }
                    });
                    partialArray.push(partialRes);
                  });
                  result[key] = partialArray;
                } else {
                  const partialRes = {};
                  keys.forEach(k => {
                    if ({}.hasOwnProperty.call(data[i], k)) {
                      partialRes[k] = data[i][k];
                    }
                  });
                  result[key] = partialRes;
                }
              } else {
                result[key] = {};
              }
            }
            i++;
          }
        }
        if (callback) { callback(result); }
        resolve(result);
      });
    });
  });
}

function observe(valueObject, interval, callback) {
  let _data = null;

  const result = setInterval(() => {
    get(valueObject).then(data => {
      if (JSON.stringify(_data) !== JSON.stringify(data)) {
        _data = Object.assign({}, data);
        callback(data);
      }
    });
  }, interval);
  return result;
}

// ----------------------------------------------------------------------------------
// export all libs
// ----------------------------------------------------------------------------------

exports.version = version;
exports.system = system.system;
exports.bios = system.bios;
exports.baseboard = system.baseboard;
exports.chassis = system.chassis;

exports.time = osInfo.time;
exports.osInfo = osInfo.osInfo;
exports.versions = osInfo.versions;
exports.shell = osInfo.shell;
exports.uuid = osInfo.uuid;

exports.cpu = cpu.cpu;
exports.cpuFlags = cpu.cpuFlags;
exports.cpuCache = cpu.cpuCache;
exports.cpuCurrentspeed = cpu.cpuCurrentspeed;
exports.cpuTemperature = cpu.cpuTemperature;
exports.currentLoad = cpu.currentLoad;
exports.fullLoad = cpu.fullLoad;

exports.mem = memory.mem;
exports.memLayout = memory.memLayout;

exports.battery = battery;

exports.graphics = graphics.graphics;

exports.fsSize = filesystem.fsSize;
exports.fsOpenFiles = filesystem.fsOpenFiles;
exports.blockDevices = filesystem.blockDevices;
exports.fsStats = filesystem.fsStats;
exports.disksIO = filesystem.disksIO;
exports.diskLayout = filesystem.diskLayout;

exports.networkInterfaceDefault = network.networkInterfaceDefault;
exports.networkGatewayDefault = network.networkGatewayDefault;
exports.networkInterfaces = network.networkInterfaces;
exports.networkStats = network.networkStats;
exports.networkConnections = network.networkConnections;

exports.wifiNetworks = wifi.wifiNetworks;

exports.services = processes.services;
exports.processes = processes.processes;
exports.processLoad = processes.processLoad;

exports.users = users.users;

exports.inetChecksite = internet.inetChecksite;
exports.inetLatency = internet.inetLatency;

exports.dockerInfo = docker.dockerInfo;
exports.dockerContainers = docker.dockerContainers;
exports.dockerContainerStats = docker.dockerContainerStats;
exports.dockerContainerProcesses = docker.dockerContainerProcesses;
exports.dockerAll = docker.dockerAll;

exports.vboxInfo = vbox.vboxInfo;

exports.getStaticData = getStaticData;
exports.getDynamicData = getDynamicData;
exports.getAllData = getAllData;
exports.get = get;
exports.observe = observe;