// react
import React, { useState } from "react";
// next
import type { NextPage } from "next";
// swr
import useSWR from "swr";
// layouts
import AdminLayout from "layouts/AdminLayout";
// hooks
import useUser from "lib/hooks/useUser";
// ui
import { Spinner } from "ui";
import { BreadcrumbItem, Breadcrumbs } from "ui/Breadcrumbs";
import { EmptySpace, EmptySpaceItem } from "ui/EmptySpace";
import HeaderButton from "ui/HeaderButton";
// constants
import { USER_ISSUE } from "constants/fetch-keys";
import { classNames } from "constants/common";
// services
import userService from "lib/services/user.service";
import issuesServices from "lib/services/issues.services";
// components
import ChangeStateDropdown from "components/project/issues/my-issues/ChangeStateDropdown";
// icons
import { ChevronDownIcon, PlusIcon, RectangleStackIcon } from "@heroicons/react/24/outline";
// types
import { IIssue } from "types";
import Link from "next/link";
import { Menu, Transition } from "@headlessui/react";

const MyIssues: NextPage = () => {
  const [selectedWorkspace, setSelectedWorkspace] = useState<string | null>(null);

  const { user, workspaces } = useUser();

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

  const updateMyIssues = (
    workspaceSlug: string,
    projectId: string,
    issueId: string,
    issue: Partial<IIssue>
  ) => {
    mutateMyIssues((prevData) => {
      return prevData?.map((prevIssue) => {
        if (prevIssue.id === issueId) {
          return {
            ...prevIssue,
            ...issue,
            state_detail: {
              ...prevIssue.state_detail,
              ...issue.state_detail,
            },
          };
        }
        return prevIssue;
      });
    }, false);
    issuesServices
      .patchIssue(workspaceSlug, projectId, issueId, issue)
      .then((response) => {
        console.log(response);
      })
      .catch((error) => {
        console.log(error);
      });
  };

  const handleWorkspaceChange = (workspaceId: string | null) => {
    setSelectedWorkspace(workspaceId);
  };

  return (
    <AdminLayout>
      <div className="w-full h-full flex flex-col space-y-5">
        {myIssues ? (
          <>
            {myIssues.length > 0 ? (
              <>
                <Breadcrumbs>
                  <BreadcrumbItem title="My Issues" />
                </Breadcrumbs>
                <div className="flex items-center justify-between cursor-pointer w-full">
                  <h2 className="text-2xl font-medium">My Issues</h2>
                  <div className="flex items-center gap-x-3">
                    <Menu as="div" className="relative inline-block w-40">
                      <div className="w-full">
                        <Menu.Button className="inline-flex justify-between items-center w-full rounded-md shadow-sm p-2 border border-gray-300 text-xs font-semibold text-gray-700 hover:bg-gray-100 focus:outline-none">
                          <span className="flex gap-x-1 items-center">
                            {workspaces?.find((w) => w.id === selectedWorkspace)?.name ??
                              "All workspaces"}
                          </span>
                          <div className="flex-grow flex justify-end">
                            <ChevronDownIcon className="h-4 w-4" aria-hidden="true" />
                          </div>
                        </Menu.Button>
                      </div>

                      <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="origin-top-left absolute left-0 mt-2 w-full rounded-md shadow-lg bg-white ring-1 ring-black ring-opacity-5 focus:outline-none z-50">
                          <div className="p-1">
                            <Menu.Item>
                              {({ active }) => (
                                <button
                                  type="button"
                                  className={`${
                                    active ? "bg-theme text-white" : "text-gray-900"
                                  } group flex w-full items-center rounded-md p-2 text-xs`}
                                  onClick={() => handleWorkspaceChange(null)}
                                >
                                  All workspaces
                                </button>
                              )}
                            </Menu.Item>
                            {workspaces &&
                              workspaces.map((workspace) => (
                                <Menu.Item key={workspace.id}>
                                  {({ active }) => (
                                    <button
                                      type="button"
                                      className={`${
                                        active ? "bg-theme text-white" : "text-gray-900"
                                      } group flex w-full items-center rounded-md p-2 text-xs`}
                                      onClick={() => handleWorkspaceChange(workspace.id)}
                                    >
                                      {workspace.name}
                                    </button>
                                  )}
                                </Menu.Item>
                              ))}
                          </div>
                        </Menu.Items>
                      </Transition>
                    </Menu>
                    <HeaderButton
                      Icon={PlusIcon}
                      label="Add Issue"
                      onClick={() => {
                        const e = new KeyboardEvent("keydown", {
                          key: "i",
                          ctrlKey: true,
                        });
                        document.dispatchEvent(e);
                      }}
                    />
                  </div>
                </div>
                <div className="mt-4 flex flex-col">
                  <div className="overflow-x-auto ">
                    <div className="inline-block min-w-full align-middle px-0.5 py-2">
                      <div className="overflow-hidden shadow ring-1 ring-black ring-opacity-5 md:rounded-lg">
                        <table className="min-w-full">
                          <thead className="bg-gray-100">
                            <tr className="text-left">
                              <th
                                scope="col"
                                className="px-3 py-3.5 text-sm font-semibold text-gray-900"
                              >
                                NAME
                              </th>
                              <th
                                scope="col"
                                className="px-3 py-3.5 text-sm font-semibold text-gray-900"
                              >
                                DESCRIPTION
                              </th>
                              <th
                                scope="col"
                                className="px-3 py-3.5 text-sm font-semibold text-gray-900"
                              >
                                PROJECT
                              </th>
                              <th
                                scope="col"
                                className="px-3 py-3.5 text-sm font-semibold text-gray-900"
                              >
                                PRIORITY
                              </th>
                              <th
                                scope="col"
                                className="px-3 py-3.5 text-sm font-semibold text-gray-900"
                              >
                                STATUS
                              </th>
                            </tr>
                          </thead>
                          <tbody className="bg-white">
                            {myIssues
                              .filter((i) =>
                                selectedWorkspace ? i.workspace === selectedWorkspace : true
                              )
                              .map((myIssue, index) => (
                                <tr
                                  key={myIssue.id}
                                  className={classNames(
                                    index === 0 ? "border-gray-300" : "border-gray-200",
                                    "border-t text-sm text-gray-900"
                                  )}
                                >
                                  <td className="px-3 py-4 text-sm font-medium text-gray-900 hover:text-theme max-w-[15rem] duration-300">
                                    <Link
                                      href={`/projects/${myIssue.project}/issues/${myIssue.id}`}
                                    >
                                      <a>{myIssue.name}</a>
                                    </Link>
                                  </td>
                                  <td className="px-3 py-4 max-w-[15rem] truncate">
                                    {/* {myIssue.description} */}
                                  </td>
                                  <td className="px-3 py-4">
                                    {myIssue.project_detail?.name}
                                    <br />
                                    <span className="text-xs">{`(${myIssue.project_detail?.identifier}-${myIssue.sequence_id})`}</span>
                                  </td>
                                  <td className="px-3 py-4 capitalize">{myIssue.priority}</td>
                                  <td className="relative px-3 py-4">
                                    <ChangeStateDropdown
                                      issue={myIssue}
                                      updateIssues={updateMyIssues}
                                    />
                                  </td>
                                </tr>
                              ))}
                          </tbody>
                        </table>
                      </div>
                    </div>
                  </div>
                </div>
              </>
            ) : (
              <div className="w-full h-full flex flex-col justify-center items-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 bg-gray-100 px-2 py-1 rounded">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="w-full h-full flex justify-center items-center">
            <Spinner />
          </div>
        )}
      </div>
    </AdminLayout>
  );
};

export default MyIssues;
