const axios = require('axios');
const EventEmitter = require('events');
const _ = require('lodash');

API_APP_ID = 'zHtVqXt8k4yFyk2QGmgp48D9xZr2G94xWYnF4dak';
API_BASE_URL = 'https://cloud.plejd.com/parse/';
API_LOGIN_URL = 'login';
API_SITES_URL = 'functions/getSites';

// #region logging
let debug = '';

const getLogger = () => {
  const consoleLogger = msg => console.log('plejd-api', msg);
  if (debug === 'console') {
    return consoleLogger;
  }
  return _.noop;
};

const logger = getLogger();
// #endregion

class PlejdApi extends EventEmitter {
  constructor(siteName, username, password, includeRoomsAsLights) {
    super();

    this.includeRoomsAsLights = includeRoomsAsLights;
    this.siteName = siteName;
    this.username = username;
    this.password = password;

    this.sessionToken = '';
    this.site = null;
  }

  updateSettings(settings) {
    if (settings.debug) {
      debug = 'console';
    }
    else {
      debug = '';
    }
  }

  login() {
    console.log('plejd-api: login()');
    console.log('logging into ' + this.siteName);
    const self = this;

    const instance = axios.create({
      baseURL: API_BASE_URL,
      headers: {
        'X-Parse-Application-Id': API_APP_ID,
        'Content-Type': 'application/json'
      }
    });

    logger('sending POST to ' + API_BASE_URL + API_LOGIN_URL);

    instance.post(
      API_LOGIN_URL,
      {
        'username': this.username,
        'password': this.password
      })
      .then((response) => {
        console.log('plejd-api: got session token response');
        self.sessionToken = response.data.sessionToken;
        self.emit('loggedIn');
      })
      .catch((error) => {
        if (error.response.status === 400) {
          console.log('error: server returned status 400. probably invalid credentials, please verify.');  
        }
        else {
          console.log('error: unable to retrieve session token response: ' + error);
        }
      });
  }

  getCryptoKey(callback) {
    console.log('plejd-api: getCryptoKey()');
    const self = this;

    const instance = axios.create({
      baseURL: API_BASE_URL,
      headers: {
        'X-Parse-Application-Id': API_APP_ID,
        'X-Parse-Session-Token': this.sessionToken,
        'Content-Type': 'application/json'
      }
    });

    logger('sending POST to ' + API_BASE_URL + API_SITES_URL);

    instance.post(API_SITES_URL)
      .then((response) => {
        console.log('plejd-api: got sites response');
        self.site = response.data.result.find(x => x.site.title == self.siteName);
        self.cryptoKey = self.site.plejdMesh.cryptoKey;

        callback(self.cryptoKey);
      })
      .catch((error) => {
        console.log('error: unable to retrieve the crypto key. error: ' + error + ' (code: ' + error.response.status + ')');
        return Promise.reject('unable to retrieve the crypto key. error: ' + error);
      });
  }

  getDevices() {
    let devices = [];

    // Just log the devices if debug logging enabled
    if (debug) {
      logger(JSON.stringify(this.site));
    }

    const roomDevices = {};

    for (let i = 0; i < this.site.devices.length; i++) {
      const device = this.site.devices[i];
      const deviceId = device.deviceId;

      const settings = this.site.outputSettings.find(x => x.deviceParseId == device.objectId);
      let deviceNum = this.site.deviceAddress[deviceId];

      if (settings) {
        const outputs = this.site.outputAddress[deviceId];
        deviceNum = outputs[settings.output];
      }

      // check if device is dimmable     
      const plejdDevice = this.site.plejdDevices.find(x => x.deviceId == deviceId);
      let { name, type, dimmable } = this._getDeviceType(plejdDevice.hardwareId);

      if (settings) {
        dimmable = settings.dimCurve != 'NonDimmable';
      }

      const newDevice = {
        id: deviceNum,
        name: device.title,
        type: type,
        typeName: name,
        dimmable: dimmable
      };

      logger(JSON.stringify(newDevice));

      if (roomDevices[device.roomId]) {
        roomDevices[device.roomId].push(newDevice);
      }
      else {
        roomDevices[device.roomId] = [newDevice];
      }

      devices.push(newDevice);
    }

    if (this.includeRoomsAsLights) {
      logger('includeRoomsAsLights is set to true, adding rooms too.');
      for (let i = 0; i < this.site.rooms.length; i++) {
        const room = this.site.rooms[i];
        const roomId = room.roomId;
        const roomAddress = this.site.roomAddress[roomId];

        const newDevice = {
          id: roomAddress,
          name: room.title,
          type: 'light',
          typeName: 'Room',
          dimmable: roomDevices[roomId].find(x => x.dimmable).length > 0
        };
  
        logger(JSON.stringify(newDevice));
  
        devices.push(newDevice);
      }
    }

    return devices;
  }

  _getDeviceType(hardwareId) {
    switch (parseInt(hardwareId)) {
      case 1:
      case 11:
        return { name: "DIM-01", type: 'light', dimmable: true };
      case 2:
        return { name: "DIM-02", type: 'light', dimmable: true };
      case 3:
        return { name: "CTR-01", type: 'light', dimmable: false };
      case 4:
        return { name: "GWY-01", type: 'sensor', dimmable: false };
      case 5:
        return { name: "LED-10", type: 'light', dimmable: true };
      case 6:
        return { name: "WPH-01", type: 'switch', dimmable: false };
      case 7:
        return { name: "REL-01", type: 'switch', dimmable: false };
      case 8:
      case 9:
        // Unknown
        return { name: "-unknown-", type: 'light', dimmable: false };
      case 10:
          return { name: "-unknown-", type: 'light', dimmable: false };
      case 12:
        // Unknown
        return { name: "-unknown-", type: 'light', dimmable: false };
      case 13:
        return { name: "Generic", type: 'light', dimmable: false };
      case 14:
      case 15:
      case 16:
        // Unknown
        return { name: "-unknown-", type: 'light', dimmable: false };
      case 17:
        return { name: "REL-01", type: 'switch', dimmable: false };
      case 18:
        return { name: "REL-02", type: 'switch', dimmable: false };
      case 19:
        // Unknown
        return { name: "-unknown-", type: 'light', dimmable: false };
      case 20:
        return { name: "SPR-01", type: 'switch', dimmable: false };
    }
  }
}

module.exports = { PlejdApi };