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

import { Variable, assignModelProperties, variableTypes } from "./variable";

export class ConstantVariable implements Variable {
  query: string;
  options: any[];
  current: any;

  defaults = {
    type: "constant",
    name: "",
    hide: 2,
    label: "",
    query: "",
    current: {},
    options: []
  };

  /** @ngInject **/
  constructor(private model, private variableSrv) {
    assignModelProperties(this, model, this.defaults);
  }

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

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

  updateOptions() {
    this.options = [{ text: this.query.trim(), value: this.query.trim() }];
    this.setValue(this.options[0]);
    return Promise.resolve();
  }

  dependsOn(variable) {
    return false;
  }

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

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

variableTypes["constant"] = {
  name: "Constant",
  ctor: ConstantVariable,
  description:
    "Define a hidden constant variable, useful for metric prefixes in dashboards you want to share"
};