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

export class AdhocVariable implements Variable {
  filters: any[];

  defaults = {
    type: "adhoc",
    name: "",
    label: "",
    hide: 0,
    datasource: null,
    filters: []
  };

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

  setValue(option) {
    return Promise.resolve();
  }

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

  updateOptions() {
    return Promise.resolve();
  }

  dependsOn(variable) {
    return false;
  }

  setValueFromUrl(urlValue) {
    if (!_.isArray(urlValue)) {
      urlValue = [urlValue];
    }

    this.filters = urlValue.map(item => {
      var values = item.split("|").map(value => {
        return this.unescapeDelimiter(value);
      });
      return {
        key: values[0],
        operator: values[1],
        value: values[2]
      };
    });

    return Promise.resolve();
  }

  getValueForUrl() {
    return this.filters.map(filter => {
      return [filter.key, filter.operator, filter.value]
        .map(value => {
          return this.escapeDelimiter(value);
        })
        .join("|");
    });
  }

  escapeDelimiter(value) {
    return value.replace(/\|/g, "__gfp__");
  }

  unescapeDelimiter(value) {
    return value.replace(/__gfp__/g, "|");
  }

  setFilters(filters: any[]) {
    this.filters = filters;
  }
}

variableTypes["adhoc"] = {
  name: "Ad hoc filters",
  ctor: AdhocVariable,
  description: "Add key/value filters on the fly"
};