'use strict'

import Vue from 'vue'
import _ from 'lodash'

/**
 * Alerts
 */
class Alerts {
  /**
   * Constructor
   *
   * @class
   */
  constructor () {
    let self = this

    self.mdl = new Vue({
      el: '#alerts',
      data: {
        children: []
      },
      methods: {
        acknowledge: (uid) => {
          self.close(uid)
        }
      }
    })

    self.uidNext = 1
  }

  /**
   * Show a new Alert
   *
   * @param      {Object}  options  Alert properties
   * @return     {null}  Void
   */
  push (options) {
    let self = this

    let nAlert = _.defaults(options, {
      _uid: self.uidNext,
      class: 'info',
      message: '---',
      sticky: false,
      title: '---'
    })

    self.mdl.children.push(nAlert)

    if (!nAlert.sticky) {
      _.delay(() => {
        self.close(nAlert._uid)
      }, 5000)
    }

    self.uidNext++
  }

  /**
   * Shorthand method for pushing errors
   *
   * @param      {String}  title    The title
   * @param      {String}  message  The message
   */
  pushError (title, message) {
    this.push({
      class: 'error',
      message,
      sticky: false,
      title
    })
  }

  /**
   * Shorthand method for pushing success messages
   *
   * @param      {String}  title    The title
   * @param      {String}  message  The message
   */
  pushSuccess (title, message) {
    this.push({
      class: 'success',
      message,
      sticky: false,
      title
    })
  }

  /**
   * Close an alert
   *
   * @param      {Integer}  uid     The unique ID of the alert
   */
  close (uid) {
    let self = this

    let nAlertIdx = _.findIndex(self.mdl.children, ['_uid', uid])
    let nAlert = _.nth(self.mdl.children, nAlertIdx)

    if (nAlertIdx >= 0 && nAlert) {
      nAlert.class += ' exit'
      Vue.set(self.mdl.children, nAlertIdx, nAlert)
      _.delay(() => {
        self.mdl.children.splice(nAlertIdx, 1)
      }, 500)
    }
  }
}

export default Alerts