import React, { useState } from "react";
import { useRouter } from "next/router";

// headless ui
import { Disclosure, Popover, Transition } from "@headlessui/react";
// icons
import { ChevronDownIcon, PlusIcon, RectangleStackIcon } from "@heroicons/react/24/outline";
// layouts
import AppLayout from "layouts/app-layout";
// hooks
import useIssues from "hooks/use-issues";
// ui
import { Spinner, EmptySpace, EmptySpaceItem, HeaderButton } from "components/ui";
import { Breadcrumbs, BreadcrumbItem } from "components/breadcrumbs";
// hooks
import useIssuesProperties from "hooks/use-issue-properties";
// types
import { IIssue, Properties } from "types";
// components
import { DeleteIssueModal, MyIssuesListItem } from "components/issues";
// helpers
import { replaceUnderscoreIfSnakeCase } from "helpers/string.helper";
// types
import type { NextPage } from "next";

const MyIssuesPage: NextPage = () => {
  const [deleteIssueModal, setDeleteIssueModal] = useState(false);
  const [issueToDelete, setIssueToDelete] = useState<IIssue | null>(null);

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

  // fetching user issues
  const { myIssues } = useIssues(workspaceSlug as string);

  const [properties, setProperties] = useIssuesProperties(
    workspaceSlug ? (workspaceSlug as string) : undefined,
    undefined
  );

  const handleDeleteIssue = (issue: IIssue) => {
    setDeleteIssueModal(true);
    setIssueToDelete(issue);
  };

  return (
    <>
      <DeleteIssueModal
        handleClose={() => setDeleteIssueModal(false)}
        isOpen={deleteIssueModal}
        data={issueToDelete}
      />
      <AppLayout
        breadcrumbs={
          <Breadcrumbs>
            <BreadcrumbItem title="My Issues" />
          </Breadcrumbs>
        }
        right={
          <div className="flex items-center gap-2">
            <Popover className="relative">
              {({ open }) => (
                <>
                  <Popover.Button
                    className={`group flex items-center gap-2 rounded-md border bg-transparent p-2 text-xs font-medium hover:bg-gray-100 hover:text-gray-900 focus:outline-none ${
                      open ? "bg-gray-100 text-gray-900" : "text-gray-500"
                    }`}
                  >
                    <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 right-1/2 z-10 mr-5 mt-1 w-screen max-w-xs translate-x-1/2 transform overflow-hidden rounded-lg bg-white p-3 shadow-lg">
                      <div className="relative flex flex-col gap-1 gap-y-4">
                        <div className="relative flex flex-col gap-1">
                          <h4 className="text-base text-gray-600">Properties</h4>
                          <div className="flex flex-wrap items-center gap-2">
                            {Object.keys(properties).map((key) => (
                              <button
                                key={key}
                                type="button"
                                className={`rounded border border-theme px-2 py-1 text-xs capitalize ${
                                  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>
            <HeaderButton
              Icon={PlusIcon}
              label="Add Issue"
              onClick={() => {
                const e = new KeyboardEvent("keydown", {
                  key: "c",
                });

                document.dispatchEvent(e);
              }}
            />
          </div>
        }
      >
        <div className="flex h-full w-full flex-col space-y-5">
          {myIssues ? (
            <>
              {myIssues.length > 0 ? (
                <div className="flex flex-col space-y-5">
                  <Disclosure as="div" defaultOpen>
                    {({ open }) => (
                      <div className="rounded-lg bg-white">
                        <div className="rounded-t-lg bg-gray-100 px-4 py-3">
                          <Disclosure.Button>
                            <div className="flex items-center gap-x-2">
                              <span>
                                <ChevronDownIcon
                                  className={`h-4 w-4 text-gray-500 ${
                                    !open ? "-rotate-90 transform" : ""
                                  }`}
                                />
                              </span>
                              <h2 className="font-medium leading-5">My Issues</h2>
                              <p className="text-sm text-gray-500">{myIssues.length}</p>
                            </div>
                          </Disclosure.Button>
                        </div>
                        <Transition
                          show={open}
                          enter="transition duration-100 ease-out"
                          enterFrom="transform opacity-0"
                          enterTo="transform opacity-100"
                          leave="transition duration-75 ease-out"
                          leaveFrom="transform opacity-100"
                          leaveTo="transform opacity-0"
                        >
                          <Disclosure.Panel>
                            <div className="divide-y-2">
                              {myIssues.map((issue: IIssue) => (
                                <MyIssuesListItem
                                  key={issue.id}
                                  issue={issue}
                                  properties={properties}
                                  projectId={issue.project}
                                  handleDeleteIssue={() => handleDeleteIssue(issue)}
                                />
                              ))}
                            </div>
                          </Disclosure.Panel>
                        </Transition>
                      </div>
                    )}
                  </Disclosure>
                </div>
              ) : (
                <div className="flex h-full w-full flex-col items-center justify-center px-4">
                  <EmptySpace
                    title="You don't have any issue assigned to you yet."
                    description="Issues help you track individual pieces of work. With Issues, keep track of what's going on, who is working on it, and what's done."
                    Icon={RectangleStackIcon}
                  >
                    <EmptySpaceItem
                      title="Create a new issue"
                      description={
                        <span>
                          Use <pre className="inline rounded bg-gray-100 px-2 py-1">C</pre> shortcut
                          to create a new issue
                        </span>
                      }
                      Icon={PlusIcon}
                      action={() => {
                        const e = new KeyboardEvent("keydown", {
                          key: "c",
                        });
                        document.dispatchEvent(e);
                      }}
                    />
                  </EmptySpace>
                </div>
              )}
            </>
          ) : (
            <div className="flex h-full w-full items-center justify-center">
              <Spinner />
            </div>
          )}
        </div>
      </AppLayout>
    </>
  );
};

export default MyIssuesPage;