// helpers
import { orderArrayBy } from "helpers/array.helper";
// types
import { IIssue, TIssueGroupByOptions, TIssueLayouts, TIssueOrderByOptions, TIssueParams } from "types";
// constants
import { ISSUE_DISPLAY_FILTERS_BY_LAYOUT } from "constants/issue";

type THandleIssuesMutation = (
  formData: Partial<IIssue>,
  oldGroupTitle: string,
  selectedGroupBy: TIssueGroupByOptions,
  issueIndex: number,
  orderBy: TIssueOrderByOptions,
  prevData?:
    | {
        [key: string]: IIssue[];
      }
    | IIssue[]
) =>
  | {
      [key: string]: IIssue[];
    }
  | IIssue[]
  | undefined;

export const handleIssuesMutation: THandleIssuesMutation = (
  formData,
  oldGroupTitle,
  selectedGroupBy,
  issueIndex,
  orderBy,
  prevData
) => {
  if (!prevData) return prevData;

  if (Array.isArray(prevData)) {
    const updatedIssue = {
      ...prevData[issueIndex],
      ...formData,
      assignees: formData?.assignees_list ?? prevData[issueIndex]?.assignees,
      labels: formData?.labels_list ?? prevData[issueIndex]?.labels,
    };

    prevData.splice(issueIndex, 1, updatedIssue);

    return [...prevData];
  } else {
    const oldGroup = prevData[oldGroupTitle ?? ""] ?? [];

    let newGroup: IIssue[] = [];

    if (selectedGroupBy === "priority") newGroup = prevData[formData.priority ?? ""] ?? [];
    else if (selectedGroupBy === "state") newGroup = prevData[formData.state ?? ""] ?? [];

    const updatedIssue = {
      ...oldGroup[issueIndex],
      ...formData,
      assignees: formData?.assignees_list ?? oldGroup[issueIndex]?.assignees,
      labels: formData?.labels_list ?? oldGroup[issueIndex]?.labels,
    };

    if (selectedGroupBy !== Object.keys(formData)[0])
      return {
        ...prevData,
        [oldGroupTitle ?? ""]: orderArrayBy(
          oldGroup.map((i) => (i.id === updatedIssue.id ? updatedIssue : i)),
          orderBy
        ),
      };

    const groupThatIsUpdated = selectedGroupBy === "priority" ? formData.priority : formData.state;

    return {
      ...prevData,
      [oldGroupTitle ?? ""]: orderArrayBy(
        oldGroup.filter((i) => i.id !== updatedIssue.id),
        orderBy
      ),
      [groupThatIsUpdated ?? ""]: orderArrayBy([...newGroup, updatedIssue], orderBy),
    };
  }
};

export const handleIssueQueryParamsByLayout = (
  layout: TIssueLayouts | undefined,
  viewType: "my_issues" | "issues" | "profile_issues" | "archived_issues" | "draft_issues"
): TIssueParams[] | null => {
  const queryParams: TIssueParams[] = [];

  if (!layout) return null;

  const layoutOptions = ISSUE_DISPLAY_FILTERS_BY_LAYOUT[viewType][layout];

  // add filters query params
  layoutOptions.filters.forEach((option) => {
    queryParams.push(option);
  });

  // add display filters query params
  Object.keys(layoutOptions.display_filters).forEach((option) => {
    queryParams.push(option as TIssueParams);
  });

  // add extra options query params
  if (layoutOptions.extra_options.access) {
    layoutOptions.extra_options.values.forEach((option) => {
      queryParams.push(option);
    });
  }

  // add start_target_date query param for the gantt_chart layout
  if (layout === "gantt_chart") queryParams.push("start_target_date");

  return queryParams;
};