// react
import React from "react";
// next
import { useRouter } from "next/router";
// swr
import useSWR, { mutate } from "swr";
// react-beautiful-dnd
import { DropResult } from "react-beautiful-dnd";
// layouots
import AppLayout from "layouts/app-layout";
// components
import CyclesListView from "components/project/cycles/ListView";
import CyclesBoardView from "components/project/cycles/BoardView";
// services
import issuesServices from "lib/services/issues.service";
import cycleServices from "lib/services/cycles.service";
import projectService from "lib/services/project.service";
// hooks
import useUser from "lib/hooks/useUser";
import useIssuesFilter from "lib/hooks/useIssuesFilter";
import useIssuesProperties from "lib/hooks/useIssuesProperties";
// headless ui
import { Menu, Popover, Transition } from "@headlessui/react";
// ui
import { BreadcrumbItem, Breadcrumbs, CustomMenu } from "ui";
// icons
import { Squares2X2Icon } from "@heroicons/react/20/solid";
import {
  ArrowPathIcon,
  ChevronDownIcon,
  EllipsisHorizontalIcon,
  ListBulletIcon,
} from "@heroicons/react/24/outline";
// types
import { CycleIssueResponse, IIssue, NestedKeyOf, Properties } from "types";
// fetch-keys
import { CYCLE_ISSUES, PROJECT_MEMBERS } from "constants/fetch-keys";
// constants
import { classNames, replaceUnderscoreIfSnakeCase } from "constants/common";
import Link from "next/link";

const groupByOptions: Array<{ name: string; key: NestedKeyOf<IIssue> | null }> = [
  { name: "State", key: "state_detail.name" },
  { name: "Priority", key: "priority" },
  { name: "Created By", key: "created_by" },
  { name: "None", key: null },
];

const orderByOptions: Array<{ name: string; key: NestedKeyOf<IIssue> }> = [
  { name: "Last created", key: "created_at" },
  { name: "Last updated", key: "updated_at" },
  { name: "Priority", key: "priority" },
];

const filterIssueOptions: Array<{
  name: string;
  key: "activeIssue" | "backlogIssue" | null;
}> = [
  {
    name: "All",
    key: null,
  },
  {
    name: "Active Issues",
    key: "activeIssue",
  },
  {
    name: "Backlog Issues",
    key: "backlogIssue",
  },
];

type Props = {};

const SingleCycle: React.FC<Props> = () => {
  const { activeWorkspace, activeProject, cycles } = useUser();

  const router = useRouter();

  const { cycleId } = router.query;

  const [properties, setProperties] = useIssuesProperties(
    activeWorkspace?.slug,
    activeProject?.id as string
  );

  const { data: cycleIssues } = useSWR<CycleIssueResponse[]>(
    activeWorkspace && activeProject && cycleId ? CYCLE_ISSUES(cycleId as string) : null,
    activeWorkspace && activeProject && cycleId
      ? () =>
          cycleServices.getCycleIssues(activeWorkspace?.slug, activeProject?.id, cycleId as string)
      : null
  );

  const cycleIssuesArray = cycleIssues?.map((issue) => {
    return issue.issue_details;
  });

  const { data: members } = useSWR(
    activeWorkspace && activeProject ? PROJECT_MEMBERS(activeProject.id) : null,
    activeWorkspace && activeProject
      ? () => projectService.projectMembers(activeWorkspace.slug, activeProject.id)
      : null,
    {
      onErrorRetry(err, _, __, revalidate, revalidateOpts) {
        if (err?.status === 403) return;
        setTimeout(() => revalidate(revalidateOpts), 5000);
      },
    }
  );

  const {
    issueView,
    setIssueView,
    groupByProperty,
    setGroupByProperty,
    groupedByIssues,
    setOrderBy,
    setFilterIssue,
    orderBy,
    filterIssue,
  } = useIssuesFilter(cycleIssuesArray ?? []);

  const addIssueToCycle = (cycleId: string, issueId: string) => {
    if (!activeWorkspace || !activeProject?.id) return;

    issuesServices
      .addIssueToCycle(activeWorkspace.slug, activeProject.id, cycleId, {
        issue: issueId,
      })
      .then((response) => {
        console.log(response);
        mutate(CYCLE_ISSUES(cycleId));
      })
      .catch((error) => {
        console.log(error);
      });
  };

  const handleDragEnd = (result: DropResult) => {
    if (!result.destination) return;
    const { source, destination } = result;

    if (source.droppableId === destination.droppableId) return;

    if (activeWorkspace && activeProject) {
      // remove issue from the source cycle
      mutate<CycleIssueResponse[]>(
        CYCLE_ISSUES(source.droppableId),
        (prevData) => prevData?.filter((p) => p.id !== result.draggableId.split(",")[0]),
        false
      );

      // add issue to the destination cycle
      mutate(CYCLE_ISSUES(destination.droppableId));

      issuesServices
        .removeIssueFromCycle(
          activeWorkspace.slug,
          activeProject.id,
          source.droppableId,
          result.draggableId.split(",")[0]
        )
        .then((res) => {
          issuesServices
            .addIssueToCycle(activeWorkspace.slug, activeProject.id, destination.droppableId, {
              issue: result.draggableId.split(",")[1],
            })
            .then((res) => {
              console.log(res);
            })
            .catch((e) => {
              console.log(e);
            });
        })
        .catch((e) => {
          console.log(e);
        });
    }
    // console.log(result);
  };

  const removeIssueFromCycle = (cycleId: string, bridgeId: string) => {
    if (activeWorkspace && activeProject) {
      mutate<CycleIssueResponse[]>(
        CYCLE_ISSUES(cycleId),
        (prevData) => prevData?.filter((p) => p.id !== bridgeId),
        false
      );

      issuesServices
        .removeIssueFromCycle(activeWorkspace.slug, activeProject.id, cycleId, bridgeId)
        .then((res) => {
          console.log(res);
        })
        .catch((e) => {
          console.log(e);
        });
    }
  };

  return (
    <AppLayout
      breadcrumbs={
        <Breadcrumbs>
          <BreadcrumbItem
            title={`${activeProject?.name ?? "Project"} Cycles`}
            link={`/projects/${activeProject?.id}/cycles`}
          />
          {/* <BreadcrumbItem title={`${cycles?.find((c) => c.id === cycleId)?.name ?? "Cycle"} `} /> */}
          <Menu as="div" className="relative inline-block">
            <Menu.Button className="flex items-center gap-1 border ml-3 px-2 py-1 rounded hover:bg-gray-100 text-xs font-medium">
              <ArrowPathIcon className="h-3 w-3" />
              Cycle
            </Menu.Button>

            <Transition
              as={React.Fragment}
              enter="transition ease-out duration-100"
              enterFrom="transform opacity-0 scale-95"
              enterTo="transform opacity-100 scale-100"
              leave="transition ease-in duration-75"
              leaveFrom="transform opacity-100 scale-100"
              leaveTo="transform opacity-0 scale-95"
            >
              <Menu.Items className="absolute left-3 mt-2 p-1 rounded-md shadow-lg bg-white ring-1 ring-black ring-opacity-5 focus:outline-none z-10">
                {cycles?.map((cycle) => (
                  <Menu.Item key={cycle.id}>
                    <Link href={`/projects/${activeProject?.id}/cycles/${cycle.id}`}>
                      <a
                        className={`block text-left p-2 text-gray-900 hover:bg-theme hover:text-white rounded-md text-xs whitespace-nowrap w-full ${
                          cycle.id === cycleId ? "bg-theme text-white" : ""
                        }`}
                      >
                        {cycle.name}
                      </a>
                    </Link>
                  </Menu.Item>
                ))}
              </Menu.Items>
            </Transition>
          </Menu>
        </Breadcrumbs>
      }
      right={
        <div className="flex items-center gap-2">
          <div className="flex items-center gap-x-1">
            <button
              type="button"
              className={`h-7 w-7 p-1 grid place-items-center rounded hover:bg-gray-200 duration-300 outline-none ${
                issueView === "list" ? "bg-gray-200" : ""
              }`}
              onClick={() => {
                setIssueView("list");
                setGroupByProperty(null);
              }}
            >
              <ListBulletIcon className="h-4 w-4" />
            </button>
            <button
              type="button"
              className={`h-7 w-7 p-1 grid place-items-center rounded hover:bg-gray-200 duration-300 outline-none ${
                issueView === "kanban" ? "bg-gray-200" : ""
              }`}
              onClick={() => {
                setIssueView("kanban");
                setGroupByProperty("state_detail.name");
              }}
            >
              <Squares2X2Icon className="h-4 w-4" />
            </button>
          </div>
          <Popover className="relative">
            {({ open }) => (
              <>
                <Popover.Button
                  className={classNames(
                    open ? "bg-gray-100 text-gray-900" : "text-gray-500",
                    "group flex gap-2 items-center rounded-md bg-transparent text-xs font-medium hover:bg-gray-100 hover:text-gray-900 focus:outline-none border p-2"
                  )}
                >
                  <span>View</span>
                  <ChevronDownIcon className="h-4 w-4" aria-hidden="true" />
                </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="absolute mr-5 right-1/2 z-10 mt-1 w-screen max-w-xs translate-x-1/2 transform p-3 bg-white rounded-lg shadow-lg overflow-hidden">
                    <div className="relative flex flex-col gap-1 gap-y-4">
                      <div className="flex justify-between items-center">
                        <h4 className="text-sm text-gray-600">Group by</h4>
                        <CustomMenu
                          label={
                            groupByOptions.find((option) => option.key === groupByProperty)?.name ??
                            "Select"
                          }
                        >
                          {groupByOptions.map((option) => (
                            <CustomMenu.MenuItem
                              key={option.key}
                              onClick={() => setGroupByProperty(option.key)}
                            >
                              {option.name}
                            </CustomMenu.MenuItem>
                          ))}
                        </CustomMenu>
                      </div>
                      <div className="flex justify-between items-center">
                        <h4 className="text-sm text-gray-600">Order by</h4>
                        <CustomMenu
                          label={
                            orderByOptions.find((option) => option.key === orderBy)?.name ??
                            "Select"
                          }
                        >
                          {orderByOptions.map((option) =>
                            groupByProperty === "priority" && option.key === "priority" ? null : (
                              <CustomMenu.MenuItem
                                key={option.key}
                                onClick={() => setOrderBy(option.key)}
                              >
                                {option.name}
                              </CustomMenu.MenuItem>
                            )
                          )}
                        </CustomMenu>
                      </div>
                      <div className="flex justify-between items-center">
                        <h4 className="text-sm text-gray-600">Issue type</h4>
                        <CustomMenu
                          label={
                            filterIssueOptions.find((option) => option.key === filterIssue)?.name ??
                            "Select"
                          }
                        >
                          {filterIssueOptions.map((option) => (
                            <CustomMenu.MenuItem
                              key={option.key}
                              onClick={() => setFilterIssue(option.key)}
                            >
                              {option.name}
                            </CustomMenu.MenuItem>
                          ))}
                        </CustomMenu>
                      </div>
                      <div className="border-b-2"></div>
                      <div className="relative flex flex-col gap-1">
                        <h4 className="text-base text-gray-600">Properties</h4>
                        <div className="flex items-center gap-2 flex-wrap">
                          {Object.keys(properties).map((key) => (
                            <button
                              key={key}
                              type="button"
                              className={`px-2 py-1 capitalize rounded border border-theme text-xs ${
                                properties[key as keyof Properties]
                                  ? "border-theme bg-theme text-white"
                                  : ""
                              }`}
                              onClick={() => setProperties(key as keyof Properties)}
                            >
                              {replaceUnderscoreIfSnakeCase(key)}
                            </button>
                          ))}
                        </div>
                      </div>
                    </div>
                  </Popover.Panel>
                </Transition>
              </>
            )}
          </Popover>
        </div>
      }
    >
      {issueView === "list" ? (
        <CyclesListView
          groupedByIssues={groupedByIssues}
          selectedGroup={groupByProperty}
          properties={properties}
          openCreateIssueModal={() => {
            return;
          }}
          openIssuesListModal={() => {
            return;
          }}
          removeIssueFromCycle={removeIssueFromCycle}
        />
      ) : (
        <div className="h-screen">
          <CyclesBoardView
            groupedByIssues={groupedByIssues}
            properties={properties}
            removeIssueFromCycle={removeIssueFromCycle}
            selectedGroup={groupByProperty}
            members={members}
            openCreateIssueModal={() => {
              return;
            }}
            openIssuesListModal={() => {
              return;
            }}
          />
        </div>
      )}
    </AppLayout>
  );
};

export default SingleCycle;
