///<reference path="../../../headers/common.d.ts" />

import _ from "lodash";
import moment from "moment";
import alertDef from "../../../features/alerting/alert_def";
import { PanelCtrl } from "app/plugins/sdk";

import * as dateMath from "app/core/utils/datemath";

class AlertListPanel extends PanelCtrl {
  static templateUrl = "module.html";
  static scrollable = true;

  showOptions = [
    { text: "Current state", value: "current" },
    { text: "Recent state changes", value: "changes" }
  ];

  sortOrderOptions = [
    { text: "Alphabetical (asc)", value: 1 },
    { text: "Alphabetical (desc)", value: 2 },
    { text: "Importance", value: 3 }
  ];

  stateFilter: any = {};
  currentAlerts: any = [];
  alertHistory: any = [];
  noAlertsMessage: string;
  // Set and populate defaults
  panelDefaults = {
    show: "current",
    limit: 10,
    stateFilter: [],
    onlyAlertsOnDashboard: false,
    sortOrder: 1
  };

  /** @ngInject */
  constructor($scope, $injector, private backendSrv) {
    super($scope, $injector);
    _.defaults(this.panel, this.panelDefaults);

    this.events.on("init-edit-mode", this.onInitEditMode.bind(this));
    this.events.on("refresh", this.onRefresh.bind(this));

    for (let key in this.panel.stateFilter) {
      this.stateFilter[this.panel.stateFilter[key]] = true;
    }
  }

  sortResult(alerts) {
    if (this.panel.sortOrder === 3) {
      return _.sortBy(alerts, a => {
        return alertDef.alertStateSortScore[a.state];
      });
    }

    var result = _.sortBy(alerts, a => {
      return a.name.toLowerCase();
    });
    if (this.panel.sortOrder === 2) {
      result.reverse();
    }

    return result;
  }

  updateStateFilter() {
    var result = [];

    for (let key in this.stateFilter) {
      if (this.stateFilter[key]) {
        result.push(key);
      }
    }

    this.panel.stateFilter = result;
    this.onRefresh();
  }

  onRefresh() {
    if (this.panel.show === "current") {
      this.getCurrentAlertState();
    }

    if (this.panel.show === "changes") {
      this.getStateChanges();
    }
  }

  getStateChanges() {
    var params: any = {
      limit: this.panel.limit,
      type: "alert",
      newState: this.panel.stateFilter
    };

    if (this.panel.onlyAlertsOnDashboard) {
      params.dashboardId = this.dashboard.id;
    }

    params.from = dateMath.parse(this.dashboard.time.from).unix() * 1000;
    params.to = dateMath.parse(this.dashboard.time.to).unix() * 1000;

    this.backendSrv.get(`/api/annotations`, params).then(res => {
      this.alertHistory = _.map(res, al => {
        al.time = this.dashboard.formatDate(al.time, "MMM D, YYYY HH:mm:ss");
        al.stateModel = alertDef.getStateDisplayModel(al.newState);
        al.info = alertDef.getAlertAnnotationInfo(al);
        return al;
      });
      this.noAlertsMessage =
        this.alertHistory.length === 0 ? "No alerts in current time range" : "";
    });
  }

  getCurrentAlertState() {
    var params: any = {
      state: this.panel.stateFilter
    };

    if (this.panel.onlyAlertsOnDashboard) {
      params.dashboardId = this.dashboard.id;
    }

    this.backendSrv.get(`/api/alerts`, params).then(res => {
      this.currentAlerts = this.sortResult(
        _.map(res, al => {
          al.stateModel = alertDef.getStateDisplayModel(al.state);
          al.newStateDateAgo = moment(al.newStateDate)
            .locale("en")
            .fromNow(true);
          return al;
        })
      );
      this.noAlertsMessage = this.currentAlerts.length === 0 ? "No alerts" : "";
    });
  }

  onInitEditMode() {
    this.addEditorTab(
      "Options",
      "public/app/plugins/panel/alertlist/editor.html"
    );
  }
}

export { AlertListPanel, AlertListPanel as PanelCtrl };