import computed from "ember-addons/ember-computed-decorators";
import Report from "admin/models/report";

export default Ember.Mixin.create({
  classNameBindings: ["isLoading", "dataSourceNames"],
  reports: null,
  isLoading: false,
  dataSourceNames: "",
  title: null,

  init() {
    this._super();
    this.set("reports", []);
  },

  @computed("dataSourceNames")
  dataSources(dataSourceNames) {
    return dataSourceNames.split(",").map(source => `/admin/reports/${source}`);
  },

  buildPayload(facets) {
    let payload = { data: { cache: true, facets } };

    if (this.get("startDate")) {
      payload.data.start_date = this.get("startDate").format(
        "YYYY-MM-DD[T]HH:mm:ss.SSSZZ"
      );
    }

    if (this.get("endDate")) {
      payload.data.end_date = this.get("endDate").format(
        "YYYY-MM-DD[T]HH:mm:ss.SSSZZ"
      );
    }

    if (this.get("limit")) {
      payload.data.limit = this.get("limit");
    }

    return payload;
  },

  @computed("reports.[]", "startDate", "endDate", "dataSourceNames")
  reportsForPeriod(reports, startDate, endDate, dataSourceNames) {
    // on a slow network fetchReport could be called multiple times between
    // T and T+x, and all the ajax responses would occur after T+(x+y)
    // to avoid any inconsistencies we filter by period and make sure
    // the array contains only unique values
    reports = reports.uniqBy("report_key");

    const sort = r => {
      if (r.length > 1) {
        return dataSourceNames.split(",").map(name => r.findBy("type", name));
      } else {
        return r;
      }
    };

    if (!startDate || !endDate) {
      return sort(reports);
    }

    return sort(
      reports.filter(report => {
        return (
          report.report_key.includes(startDate.format("YYYYMMDD")) &&
          report.report_key.includes(endDate.format("YYYYMMDD"))
        );
      })
    );
  },

  didInsertElement() {
    this._super();

    this.fetchReport().finally(() => {
      this.renderReport();
    });
  },

  didUpdateAttrs() {
    this._super();

    this.fetchReport().finally(() => {
      this.renderReport();
    });
  },

  renderReport() {
    if (!this.element || this.isDestroying || this.isDestroyed) return;
    this.set(
      "title",
      this.get("reportsForPeriod")
        .map(r => r.title)
        .join(", ")
    );
    this.set("isLoading", false);
  },

  loadReport(jsonReport) {
    return Report.create(jsonReport);
  },

  fetchReport() {
    this.set("reports", []);
    this.set("isLoading", true);
  }
});