import React, { useEffect, useState } from "react";
// next
import { useRouter } from "next/router";
import type { NextPage } from "next";
// swr
import useSWR, { mutate } from "swr";
// services
import issuesServices from "lib/services/issues.services";
import sprintService from "lib/services/cycles.services";
// hooks
import useUser from "lib/hooks/useUser";
// fetching keys
import { CYCLE_ISSUES, CYCLE_LIST } from "constants/fetch-keys";
// layouts
import AdminLayout from "layouts/AdminLayout";
// components
import SprintView from "components/project/cycles/CycleView";
import ConfirmIssueDeletion from "components/project/issues/ConfirmIssueDeletion";
import ConfirmSprintDeletion from "components/project/cycles/ConfirmCycleDeletion";
import CreateUpdateIssuesModal from "components/project/issues/CreateUpdateIssueModal";
import CreateUpdateSprintsModal from "components/project/cycles/CreateUpdateCyclesModal";
// ui
import { Spinner } from "ui";
// icons
import { PlusIcon } from "@heroicons/react/20/solid";
// types
import { IIssue, ICycle, SelectSprintType, SelectIssue } from "types";
import { EmptySpace, EmptySpaceItem } from "ui/EmptySpace";
import { ArrowPathIcon } from "@heroicons/react/24/outline";
import HeaderButton from "ui/HeaderButton";
import { BreadcrumbItem, Breadcrumbs } from "ui/Breadcrumbs";

const ProjectSprints: NextPage = () => {
  const [isOpen, setIsOpen] = useState(false);
  const [selectedSprint, setSelectedSprint] = useState<SelectSprintType>();

  const [isIssueModalOpen, setIsIssueModalOpen] = useState(false);
  const [selectedIssues, setSelectedIssues] = useState<SelectIssue>();
  const [deleteIssue, setDeleteIssue] = useState<string | undefined>();

  const { activeWorkspace, activeProject } = useUser();

  const router = useRouter();

  const { projectId } = router.query;

  const { data: sprints } = useSWR<ICycle[]>(
    projectId && activeWorkspace ? CYCLE_LIST(projectId as string) : null,
    activeWorkspace && projectId
      ? () => sprintService.getCycles(activeWorkspace.slug, projectId as string)
      : null
  );

  const openIssueModal = (
    sprintId: string,
    issue?: IIssue,
    actionType: "create" | "edit" | "delete" = "create"
  ) => {
    const sprint = sprints?.find((sprint) => sprint.id === sprintId);
    if (sprint) {
      setSelectedSprint({
        ...sprint,
        actionType: "create-issue",
      });
      if (issue) setSelectedIssues({ ...issue, actionType });
      setIsIssueModalOpen(true);
    }
  };

  const addIssueToSprint = (sprintId: string, issueId: string) => {
    if (!activeWorkspace || !projectId) return;

    issuesServices
      .addIssueToSprint(activeWorkspace.slug, projectId as string, sprintId, {
        issue: issueId,
      })
      .then((response) => {
        console.log(response);
        mutate(CYCLE_ISSUES(sprintId));
      })
      .catch((error) => {
        console.log(error);
      });
  };

  useEffect(() => {
    if (isOpen) return;
    const timer = setTimeout(() => {
      setSelectedSprint(undefined);
      clearTimeout(timer);
    }, 500);
  }, [isOpen]);

  useEffect(() => {
    if (selectedIssues?.actionType === "delete") {
      setDeleteIssue(selectedIssues.id);
    }
  }, [selectedIssues]);

  return (
    <AdminLayout
      meta={{
        title: "Plane - Cycles",
      }}
    >
      <CreateUpdateSprintsModal
        isOpen={
          isOpen &&
          selectedSprint?.actionType !== "delete" &&
          selectedSprint?.actionType !== "create-issue"
        }
        setIsOpen={setIsOpen}
        data={selectedSprint}
        projectId={projectId as string}
      />
      <ConfirmSprintDeletion
        isOpen={isOpen && !!selectedSprint && selectedSprint.actionType === "delete"}
        setIsOpen={setIsOpen}
        data={selectedSprint}
      />
      <ConfirmIssueDeletion
        handleClose={() => setDeleteIssue(undefined)}
        isOpen={!!deleteIssue}
        data={selectedIssues}
      />
      <CreateUpdateIssuesModal
        isOpen={
          isIssueModalOpen &&
          selectedSprint?.actionType === "create-issue" &&
          selectedIssues?.actionType !== "delete"
        }
        data={selectedIssues}
        prePopulateData={{ sprints: selectedSprint?.id }}
        setIsOpen={setIsOpen}
        projectId={projectId as string}
      />
      {sprints ? (
        sprints.length > 0 ? (
          <div className="h-full w-full space-y-5">
            <Breadcrumbs>
              <BreadcrumbItem title="Projects" link="/projects" />
              <BreadcrumbItem title={`${activeProject?.name ?? "Project"} Cycles`} />
            </Breadcrumbs>
            <div className="flex items-center justify-between cursor-pointer w-full">
              <h2 className="text-2xl font-medium">Project Cycle</h2>
              <HeaderButton Icon={PlusIcon} label="Add Cycle" onClick={() => setIsOpen(true)} />
            </div>
            <div className="h-full w-full">
              {sprints.map((sprint) => (
                <SprintView
                  sprint={sprint}
                  selectSprint={setSelectedSprint}
                  projectId={projectId as string}
                  workspaceSlug={activeWorkspace?.slug as string}
                  openIssueModal={openIssueModal}
                  addIssueToSprint={addIssueToSprint}
                  key={sprint.id}
                />
              ))}
            </div>
          </div>
        ) : (
          <div className="w-full h-full flex flex-col justify-center items-center px-4">
            <EmptySpace
              title="You don't have any cycle yet."
              description="A cycle is a fixed time period where a team commits to a set number of issues from their backlog. Cycles are usually one, two, or four weeks long."
              Icon={ArrowPathIcon}
            >
              <EmptySpaceItem
                title="Create a new cycle"
                description={
                  <span>
                    Use <pre className="inline bg-gray-100 px-2 py-1 rounded">Ctrl/Command + Q</pre>{" "}
                    shortcut to create a new cycle
                  </span>
                }
                Icon={PlusIcon}
                action={() => setIsOpen(true)}
              />
            </EmptySpace>
          </div>
        )
      ) : (
        <div className="w-full h-full flex justify-center items-center">
          <Spinner />
        </div>
      )}
    </AdminLayout>
  );
};

export default ProjectSprints;