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

import _ from "lodash";
import kbn from "app/core/utils/kbn";
import { Variable, assignModelProperties, variableTypes } from "./variable";

export class IntervalVariable implements Variable {
  name: string;
  auto_count: number;
  auto_min: number;
  options: any;
  auto: boolean;
  query: string;
  refresh: number;
  current: any;

  defaults = {
    type: "interval",
    name: "",
    hide: 0,
    label: "",
    refresh: 2,
    options: [],
    current: {},
    query: "1m,10m,30m,1h,6h,12h,1d,7d,14d,30d",
    auto: false,
    auto_min: "10s",
    auto_count: 30
  };

  /** @ngInject **/
  constructor(
    private model,
    private timeSrv,
    private templateSrv,
    private variableSrv
  ) {
    assignModelProperties(this, model, this.defaults);
    this.refresh = 2;
  }

  getSaveModel() {
    assignModelProperties(this.model, this, this.defaults);
    return this.model;
  }

  setValue(option) {
    this.updateAutoValue();
    return this.variableSrv.setOptionAsCurrent(this, option);
  }

  updateAutoValue() {
    if (!this.auto) {
      return;
    }

    // add auto option if missing
    if (this.options.length && this.options[0].text !== "auto") {
      this.options.unshift({
        text: "auto",
        value: "$__auto_interval_" + this.name
      });
    }

    var res = kbn.calculateInterval(
      this.timeSrv.timeRange(),
      this.auto_count,
      this.auto_min
    );
    this.templateSrv.setGrafanaVariable(
      "$__auto_interval_" + this.name,
      res.interval
    );
    // for backward compatibility, to be removed eventually
    this.templateSrv.setGrafanaVariable("$__auto_interval", res.interval);
  }

  updateOptions() {
    // extract options between quotes and/or comma
    this.options = _.map(this.query.match(/(["'])(.*?)\1|\w+/g), function(
      text
    ) {
      text = text.replace(/["']+/g, "");
      return { text: text.trim(), value: text.trim() };
    });

    this.updateAutoValue();
    return this.variableSrv.validateVariableSelectionState(this);
  }

  dependsOn(variable) {
    return false;
  }

  setValueFromUrl(urlValue) {
    this.updateAutoValue();
    return this.variableSrv.setOptionFromUrl(this, urlValue);
  }

  getValueForUrl() {
    return this.current.value;
  }
}

variableTypes["interval"] = {
  name: "Interval",
  ctor: IntervalVariable,
  description: "Define a timespan interval (ex 1m, 1h, 1d)"
};