import React, { useState } from "react";
import { useRouter } from "next/router";
import { Popover, Transition } from "@headlessui/react";
import { observer } from "mobx-react-lite";
import { usePopper } from "react-popper";
// hooks
import { useCalendarView } from "hooks/store";
// ui
import { ToggleSwitch } from "@plane/ui";
// icons
import { Check, ChevronUp } from "lucide-react";
// types
import { TCalendarLayouts } from "@plane/types";
// constants
import { CALENDAR_LAYOUTS } from "constants/calendar";
import { EIssueFilterType } from "constants/issue";
import { ICycleIssuesFilter } from "store/issue/cycle";
import { IModuleIssuesFilter } from "store/issue/module";
import { IProjectIssuesFilter } from "store/issue/project";
import { IProjectViewIssuesFilter } from "store/issue/project-views";

interface ICalendarHeader {
  issuesFilterStore: IProjectIssuesFilter | IModuleIssuesFilter | ICycleIssuesFilter | IProjectViewIssuesFilter;
  viewId?: string;
}

export const CalendarOptionsDropdown: React.FC<ICalendarHeader> = observer((props) => {
  const { issuesFilterStore, viewId } = props;

  const router = useRouter();
  const { workspaceSlug, projectId } = router.query;

  const issueCalendarView = useCalendarView();

  const [referenceElement, setReferenceElement] = useState<HTMLButtonElement | null>(null);
  const [popperElement, setPopperElement] = useState<HTMLDivElement | null>(null);

  const { styles, attributes } = usePopper(referenceElement, popperElement, {
    placement: "auto",
    modifiers: [
      {
        name: "preventOverflow",
        options: {
          padding: 12,
        },
      },
    ],
  });

  const calendarLayout = issuesFilterStore.issueFilters?.displayFilters?.calendar?.layout ?? "month";
  const showWeekends = issuesFilterStore.issueFilters?.displayFilters?.calendar?.show_weekends ?? false;

  const handleLayoutChange = (layout: TCalendarLayouts) => {
    if (!workspaceSlug || !projectId) return;

    issuesFilterStore.updateFilters(
      workspaceSlug.toString(),
      projectId.toString(),
      EIssueFilterType.DISPLAY_FILTERS,
      {
        calendar: {
          ...issuesFilterStore.issueFilters?.displayFilters?.calendar,
          layout,
        },
      },
      viewId
    );

    issueCalendarView.updateCalendarPayload(
      layout === "month"
        ? issueCalendarView.calendarFilters.activeMonthDate
        : issueCalendarView.calendarFilters.activeWeekDate
    );
  };

  const handleToggleWeekends = () => {
    const showWeekends = issuesFilterStore.issueFilters?.displayFilters?.calendar?.show_weekends ?? false;

    if (!workspaceSlug || !projectId) return;

    issuesFilterStore.updateFilters(
      workspaceSlug.toString(),
      projectId.toString(),
      EIssueFilterType.DISPLAY_FILTERS,
      {
        calendar: {
          ...issuesFilterStore.issueFilters?.displayFilters?.calendar,
          show_weekends: !showWeekends,
        },
      },
      viewId
    );
  };

  return (
    <Popover className="relative">
      {({ open }) => (
        <>
          <Popover.Button as={React.Fragment}>
            <button
              type="button"
              ref={setReferenceElement}
              className={`flex items-center gap-1.5 rounded bg-custom-background-80 px-2.5 py-1 text-xs outline-none hover:bg-custom-background-80 ${
                open ? "text-custom-text-100" : "text-custom-text-200"
              }`}
            >
              <div className="font-medium">Options</div>
              <div
                className={`flex h-3.5 w-3.5 items-center justify-center transition-all ${open ? "" : "rotate-180"}`}
              >
                <ChevronUp width={12} strokeWidth={2} />
              </div>
            </button>
          </Popover.Button>
          <Transition
            as={React.Fragment}
            enter="transition ease-out duration-200"
            enterFrom="opacity-0 translate-y-1"
            enterTo="opacity-100 translate-y-0"
            leave="transition ease-in duration-150"
            leaveFrom="opacity-100 translate-y-0"
            leaveTo="opacity-0 translate-y-1"
          >
            <Popover.Panel className="fixed z-50">
              <div
                ref={setPopperElement}
                style={styles.popper}
                {...attributes.popper}
                className="absolute right-0 z-10 mt-1 min-w-[12rem] overflow-hidden rounded border border-custom-border-200 bg-custom-background-100 p-1 shadow-custom-shadow-sm"
              >
                <div>
                  {Object.entries(CALENDAR_LAYOUTS).map(([layout, layoutDetails]) => (
                    <button
                      key={layout}
                      type="button"
                      className="flex w-full items-center justify-between gap-2 rounded px-1 py-1.5 text-left text-xs hover:bg-custom-background-80"
                      onClick={() => handleLayoutChange(layoutDetails.key)}
                    >
                      {layoutDetails.title}
                      {calendarLayout === layout && <Check size={12} strokeWidth={2} />}
                    </button>
                  ))}
                  <button
                    type="button"
                    className="flex w-full items-center justify-between gap-2 rounded px-1 py-1.5 text-left text-xs hover:bg-custom-background-80"
                    onClick={handleToggleWeekends}
                  >
                    Show weekends
                    <ToggleSwitch value={showWeekends} onChange={() => {}} />
                  </button>
                </div>
              </div>
            </Popover.Panel>
          </Transition>
        </>
      )}
    </Popover>
  );
});