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

import _ from "lodash";
import { ThresholdMapper } from "./threshold_mapper";
import { QueryPart } from "app/core/components/query_part/query_part";
import alertDef from "./alert_def";
import config from "app/core/config";
import appEvents from "app/core/app_events";

export class AlertTabCtrl {
  panel: any;
  panelCtrl: any;
  testing: boolean;
  testResult: any;
  subTabIndex: number;
  conditionTypes: any;
  alert: any;
  conditionModels: any;
  evalFunctions: any;
  evalOperators: any;
  noDataModes: any;
  executionErrorModes: any;
  addNotificationSegment;
  notifications;
  alertNotifications;
  error: string;
  appSubUrl: string;
  alertHistory: any;

  /** @ngInject */
  constructor(
    private $scope,
    private backendSrv,
    private dashboardSrv,
    private uiSegmentSrv,
    private $q,
    private datasourceSrv
  ) {
    this.panelCtrl = $scope.ctrl;
    this.panel = this.panelCtrl.panel;
    this.$scope.ctrl = this;
    this.subTabIndex = 0;
    this.evalFunctions = alertDef.evalFunctions;
    this.evalOperators = alertDef.evalOperators;
    this.conditionTypes = alertDef.conditionTypes;
    this.noDataModes = alertDef.noDataModes;
    this.executionErrorModes = alertDef.executionErrorModes;
    this.appSubUrl = config.appSubUrl;
  }

  $onInit() {
    this.addNotificationSegment = this.uiSegmentSrv.newPlusButton();

    // subscribe to graph threshold handle changes
    var thresholdChangedEventHandler = this.graphThresholdChanged.bind(this);
    this.panelCtrl.events.on("threshold-changed", thresholdChangedEventHandler);

    // set panel alert edit mode
    this.$scope.$on("$destroy", () => {
      this.panelCtrl.events.off(
        "threshold-changed",
        thresholdChangedEventHandler
      );
      this.panelCtrl.editingThresholds = false;
      this.panelCtrl.render();
    });

    // build notification model
    this.notifications = [];
    this.alertNotifications = [];
    this.alertHistory = [];

    return this.backendSrv.get("/api/alert-notifications").then(res => {
      this.notifications = res;

      this.initModel();
      this.validateModel();
    });
  }

  getAlertHistory() {
    this.backendSrv
      .get(
        `/api/annotations?dashboardId=${this.panelCtrl.dashboard.id}&panelId=${
          this.panel.id
        }&limit=50`
      )
      .then(res => {
        this.alertHistory = _.map(res, ah => {
          ah.time = this.dashboardSrv
            .getCurrent()
            .formatDate(ah.time, "MMM D, YYYY HH:mm:ss");
          ah.stateModel = alertDef.getStateDisplayModel(ah.newState);
          ah.info = alertDef.getAlertAnnotationInfo(ah);
          return ah;
        });
      });
  }

  getNotificationIcon(type): string {
    switch (type) {
      case "email":
        return "fa fa-envelope";
      case "slack":
        return "fa fa-slack";
      case "victorops":
        return "fa fa-pagelines";
      case "webhook":
        return "fa fa-cubes";
      case "pagerduty":
        return "fa fa-bullhorn";
      case "opsgenie":
        return "fa fa-bell";
      case "hipchat":
        return "fa fa-mail-forward";
      case "pushover":
        return "fa fa-mobile";
      case "kafka":
        return "fa fa-random";
      case "teams":
        return "fa fa-windows";
    }
    return "fa fa-bell";
  }

  getNotifications() {
    return Promise.resolve(
      this.notifications.map(item => {
        return this.uiSegmentSrv.newSegment(item.name);
      })
    );
  }

  changeTabIndex(newTabIndex) {
    this.subTabIndex = newTabIndex;

    if (this.subTabIndex === 2) {
      this.getAlertHistory();
    }
  }

  notificationAdded() {
    var model = _.find(this.notifications, {
      name: this.addNotificationSegment.value
    });
    if (!model) {
      return;
    }

    this.alertNotifications.push({
      name: model.name,
      iconClass: this.getNotificationIcon(model.type),
      isDefault: false
    });
    this.alert.notifications.push({ id: model.id });

    // reset plus button
    this.addNotificationSegment.value = this.uiSegmentSrv.newPlusButton().value;
    this.addNotificationSegment.html = this.uiSegmentSrv.newPlusButton().html;
  }

  removeNotification(index) {
    this.alert.notifications.splice(index, 1);
    this.alertNotifications.splice(index, 1);
  }

  initModel() {
    var alert = (this.alert = this.panel.alert);
    if (!alert) {
      return;
    }

    alert.conditions = alert.conditions || [];
    if (alert.conditions.length === 0) {
      alert.conditions.push(this.buildDefaultCondition());
    }

    alert.noDataState = alert.noDataState || "no_data";
    alert.executionErrorState = alert.executionErrorState || "alerting";
    alert.frequency = alert.frequency || "60s";
    alert.handler = alert.handler || 1;
    alert.notifications = alert.notifications || [];

    var defaultName = this.panel.title + " alert";
    alert.name = alert.name || defaultName;

    this.conditionModels = _.reduce(
      alert.conditions,
      (memo, value) => {
        memo.push(this.buildConditionModel(value));
        return memo;
      },
      []
    );

    ThresholdMapper.alertToGraphThresholds(this.panel);

    for (let addedNotification of alert.notifications) {
      var model = _.find(this.notifications, { id: addedNotification.id });
      if (model && model.isDefault === false) {
        model.iconClass = this.getNotificationIcon(model.type);
        this.alertNotifications.push(model);
      }
    }

    for (let notification of this.notifications) {
      if (notification.isDefault) {
        notification.iconClass = this.getNotificationIcon(notification.type);
        notification.bgColor = "#00678b";
        this.alertNotifications.push(notification);
      }
    }

    this.panelCtrl.editingThresholds = true;
    this.panelCtrl.render();
  }

  graphThresholdChanged(evt) {
    for (var condition of this.alert.conditions) {
      if (condition.type === "query") {
        condition.evaluator.params[evt.handleIndex] = evt.threshold.value;
        this.evaluatorParamsChanged();
        break;
      }
    }
  }

  buildDefaultCondition() {
    return {
      type: "query",
      query: { params: ["A", "5m", "now"] },
      reducer: { type: "avg", params: [] },
      evaluator: { type: "gt", params: [null] },
      operator: { type: "and" }
    };
  }

  validateModel() {
    if (!this.alert) {
      return;
    }

    let firstTarget;
    let foundTarget = null;

    for (var condition of this.alert.conditions) {
      if (condition.type !== "query") {
        continue;
      }

      for (var target of this.panel.targets) {
        if (!firstTarget) {
          firstTarget = target;
        }
        if (condition.query.params[0] === target.refId) {
          foundTarget = target;
          break;
        }
      }

      if (!foundTarget) {
        if (firstTarget) {
          condition.query.params[0] = firstTarget.refId;
          foundTarget = firstTarget;
        } else {
          this.error = "Could not find any metric queries";
        }
      }

      var datasourceName = foundTarget.datasource || this.panel.datasource;
      this.datasourceSrv.get(datasourceName).then(ds => {
        if (!ds.meta.alerting) {
          this.error = "The datasource does not support alerting queries";
        } else if (ds.targetContainsTemplate(foundTarget)) {
          this.error = "Template variables are not supported in alert queries";
        } else {
          this.error = "";
        }
      });
    }
  }

  buildConditionModel(source) {
    var cm: any = { source: source, type: source.type };

    cm.queryPart = new QueryPart(source.query, alertDef.alertQueryDef);
    cm.reducerPart = alertDef.createReducerPart(source.reducer);
    cm.evaluator = source.evaluator;
    cm.operator = source.operator;

    return cm;
  }

  handleQueryPartEvent(conditionModel, evt) {
    switch (evt.name) {
      case "action-remove-part": {
        break;
      }
      case "get-part-actions": {
        return this.$q.when([]);
      }
      case "part-param-changed": {
        this.validateModel();
      }
      case "get-param-options": {
        var result = this.panel.targets.map(target => {
          return this.uiSegmentSrv.newSegment({ value: target.refId });
        });

        return this.$q.when(result);
      }
    }
  }

  handleReducerPartEvent(conditionModel, evt) {
    switch (evt.name) {
      case "action": {
        conditionModel.source.reducer.type = evt.action.value;
        conditionModel.reducerPart = alertDef.createReducerPart(
          conditionModel.source.reducer
        );
        break;
      }
      case "get-part-actions": {
        var result = [];
        for (var type of alertDef.reducerTypes) {
          if (type.value !== conditionModel.source.reducer.type) {
            result.push(type);
          }
        }
        return this.$q.when(result);
      }
    }
  }

  addCondition(type) {
    var condition = this.buildDefaultCondition();
    // add to persited model
    this.alert.conditions.push(condition);
    // add to view model
    this.conditionModels.push(this.buildConditionModel(condition));
  }

  removeCondition(index) {
    this.alert.conditions.splice(index, 1);
    this.conditionModels.splice(index, 1);
  }

  delete() {
    appEvents.emit("confirm-modal", {
      title: "Delete Alert",
      text: "Are you sure you want to delete this alert rule?",
      text2: "You need to save dashboard for the delete to take effect",
      icon: "fa-trash",
      yesText: "Delete",
      onConfirm: () => {
        delete this.panel.alert;
        this.alert = null;
        this.panel.thresholds = [];
        this.conditionModels = [];
        this.panelCtrl.alertState = null;
        this.panelCtrl.render();
      }
    });
  }

  enable() {
    this.panel.alert = {};
    this.initModel();
  }

  evaluatorParamsChanged() {
    ThresholdMapper.alertToGraphThresholds(this.panel);
    this.panelCtrl.render();
  }

  evaluatorTypeChanged(evaluator) {
    // ensure params array is correct length
    switch (evaluator.type) {
      case "lt":
      case "gt": {
        evaluator.params = [evaluator.params[0]];
        break;
      }
      case "within_range":
      case "outside_range": {
        evaluator.params = [evaluator.params[0], evaluator.params[1]];
        break;
      }
      case "no_value": {
        evaluator.params = [];
      }
    }

    this.evaluatorParamsChanged();
  }

  clearHistory() {
    appEvents.emit("confirm-modal", {
      title: "Delete Alert History",
      text:
        "Are you sure you want to remove all history & annotations for this alert?",
      icon: "fa-trash",
      yesText: "Yes",
      onConfirm: () => {
        this.backendSrv
          .post("/api/annotations/mass-delete", {
            dashboardId: this.panelCtrl.dashboard.id,
            panelId: this.panel.id
          })
          .then(res => {
            this.alertHistory = [];
            this.panelCtrl.refresh();
          });
      }
    });
  }

  test() {
    this.testing = true;
    this.testResult = false;

    var payload = {
      dashboard: this.dashboardSrv.getCurrent().getSaveModelClone(),
      panelId: this.panelCtrl.panel.id
    };

    return this.backendSrv.post("/api/alerts/test", payload).then(res => {
      this.testResult = res;
      this.testing = false;
    });
  }
}

/** @ngInject */
export function alertTab() {
  "use strict";
  return {
    restrict: "E",
    scope: true,
    templateUrl: "public/app/features/alerting/partials/alert_tab.html",
    controller: AlertTabCtrl
  };
}