import React from "react";

import { useRouter } from "next/router";
import type { NextPage, NextPageContext } from "next";

import useSWR from "swr";

import { ChevronDownIcon, PlusIcon, RectangleStackIcon } from "@heroicons/react/24/outline";
import { Disclosure, Popover, Transition } from "@headlessui/react";

// layouts
import AppLayout from "layouts/app-layout";
// hooks
import useUser from "lib/hooks/useUser";
// ui
import { Spinner, Breadcrumbs, BreadcrumbItem, EmptySpace, EmptySpaceItem, HeaderButton } from "ui";
// services
import userService from "lib/services/user.service";
// hooks
import useIssuesProperties from "lib/hooks/useIssuesProperties";
// types
import { IIssue, Properties } from "types";
// lib
import { requiredAuth } from "lib/auth";
// constants
import { USER_ISSUE } from "constants/fetch-keys";
import { classNames, replaceUnderscoreIfSnakeCase } from "constants/common";
import SingleListIssue from "components/common/list-view/single-issue";

const MyIssues: NextPage = () => {
  const router = useRouter();
  const {
    query: { workspaceSlug },
  } = router;

  const { user } = useUser();

  const { data: myIssues } = useSWR<IIssue[]>(
    user && workspaceSlug ? USER_ISSUE(workspaceSlug as string) : null,
    user && workspaceSlug ? () => userService.userIssues(workspaceSlug as string) : null
  );

  // FIXME: remove this hard-coded value
  const [properties, setProperties] = useIssuesProperties(
    workspaceSlug ? (workspaceSlug as string) : undefined,
    undefined
  );

  return (
    <AppLayout
      breadcrumbs={
        <Breadcrumbs>
          <BreadcrumbItem title="My Issues" />
        </Breadcrumbs>
      }
      right={
        <div className="flex items-center gap-2">
          <Popover className="relative">
            {({ open }) => (
              <>
                <Popover.Button
                  className={classNames(
                    open ? "bg-gray-100 text-gray-900" : "text-gray-500",
                    "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"
                  )}
                >
                  <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: "i",
                ctrlKey: true,
              });
              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) => (
                              // FIXME: add all functionalities
                              <SingleListIssue
                                key={issue.id}
                                editIssue={() => {}}
                                handleDeleteIssue={() => {}}
                                issue={issue}
                                properties={properties}
                                removeIssue={() => {}}
                              />
                            ))}
                          </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">Ctrl/Command + I</pre>{" "}
                        shortcut to create a new issue
                      </span>
                    }
                    Icon={PlusIcon}
                    action={() => {
                      const e = new KeyboardEvent("keydown", {
                        key: "i",
                        ctrlKey: true,
                      });
                      document.dispatchEvent(e);
                    }}
                  />
                </EmptySpace>
              </div>
            )}
          </>
        ) : (
          <div className="flex h-full w-full items-center justify-center">
            <Spinner />
          </div>
        )}
      </div>
    </AppLayout>
  );
};

export const getServerSideProps = async (ctx: NextPageContext) => {
  const user = await requiredAuth(ctx.req?.headers.cookie);

  const redirectAfterSignIn = ctx.req?.url;

  if (!user) {
    return {
      redirect: {
        destination: `/signin?next=${redirectAfterSignIn}`,
        permanent: false,
      },
    };
  }

  return {
    props: {
      user,
    },
  };
};

export default MyIssues;