import React, { useState, useCallback, useEffect } from "react";
// next
import { useRouter } from "next/router";
// headless ui
import { Combobox, Dialog, Transition } from "@headlessui/react";
// hooks
import useUser from "lib/hooks/useUser";
import useTheme from "lib/hooks/useTheme";
import useToast from "lib/hooks/useToast";
// icons
import { MagnifyingGlassIcon } from "@heroicons/react/20/solid";
import { DocumentPlusIcon, FolderPlusIcon, FolderIcon } from "@heroicons/react/24/outline";
// commons
import { classNames, copyTextToClipboard } from "constants/common";
// components
import ShortcutsModal from "components/command-palette/shortcuts";
import CreateProjectModal from "components/project/CreateProjectModal";
import CreateUpdateIssuesModal from "components/project/issues/CreateUpdateIssueModal";
import CreateUpdateCycleModal from "components/project/cycles/CreateUpdateCyclesModal";
// types
import { IIssue } from "types";
type ItemType = {
  name: string;
  url?: string;
  onClick?: () => void;
};

const CommandPalette: React.FC = () => {
  const router = useRouter();

  const [query, setQuery] = useState("");

  const [isPaletteOpen, setIsPaletteOpen] = useState(false);
  const [isIssueModalOpen, setIsIssueModalOpen] = useState(false);
  const [isProjectModalOpen, setIsProjectModalOpen] = useState(false);
  const [isShortcutsModalOpen, setIsShortcutsModalOpen] = useState(false);
  const [isCreateCycleModalOpen, setIsCreateCycleModalOpen] = useState(false);

  const { issues, activeProject } = useUser();

  const { toggleCollapsed } = useTheme();

  const { setToastAlert } = useToast();

  const filteredIssues: IIssue[] =
    query === ""
      ? issues?.results ?? []
      : issues?.results.filter((issue) => issue.name.toLowerCase().includes(query.toLowerCase())) ??
        [];

  const quickActions = [
    {
      name: "Add new issue...",
      icon: DocumentPlusIcon,
      shortcut: "I",
      onClick: () => {
        setIsIssueModalOpen(true);
      },
    },
    {
      name: "Add new project...",
      icon: FolderPlusIcon,
      shortcut: "P",
      onClick: () => {
        setIsProjectModalOpen(true);
      },
    },
  ];

  const handleCommandPaletteClose = () => {
    setIsPaletteOpen(false);
    setQuery("");
  };

  const handleKeyDown = useCallback(
    (e: KeyboardEvent) => {
      if (e.ctrlKey && e.key === "/") {
        e.preventDefault();
        setIsPaletteOpen(true);
      } else if (e.ctrlKey && e.key === "i") {
        e.preventDefault();
        setIsIssueModalOpen(true);
      } else if (e.ctrlKey && e.key === "p") {
        e.preventDefault();
        setIsProjectModalOpen(true);
      } else if (e.ctrlKey && e.key === "b") {
        e.preventDefault();
        toggleCollapsed();
      } else if (e.ctrlKey && e.key === "h") {
        e.preventDefault();
        setIsShortcutsModalOpen(true);
      } else if (e.ctrlKey && e.key === "q") {
        e.preventDefault();
        setIsCreateCycleModalOpen(true);
      } else if (e.ctrlKey && e.altKey && e.key === "c") {
        e.preventDefault();

        if (!router.query.issueId) return;

        const url = new URL(window.location.href);
        copyTextToClipboard(url.href)
          .then(() => {
            setToastAlert({
              type: "success",
              title: "Copied to clipboard",
            });
          })
          .catch(() => {
            setToastAlert({
              type: "error",
              title: "Some error occurred",
            });
          });
      }
    },
    [toggleCollapsed, setToastAlert, router]
  );

  useEffect(() => {
    document.addEventListener("keydown", handleKeyDown);
    return () => document.removeEventListener("keydown", handleKeyDown);
  }, [handleKeyDown]);

  return (
    <>
      <ShortcutsModal isOpen={isShortcutsModalOpen} setIsOpen={setIsShortcutsModalOpen} />
      <CreateProjectModal isOpen={isProjectModalOpen} setIsOpen={setIsProjectModalOpen} />
      {activeProject && (
        <CreateUpdateCycleModal
          isOpen={isCreateCycleModalOpen}
          setIsOpen={setIsCreateCycleModalOpen}
          projectId={activeProject.id}
        />
      )}
      <CreateUpdateIssuesModal
        isOpen={isIssueModalOpen}
        setIsOpen={setIsIssueModalOpen}
        projectId={activeProject?.id}
      />

      <Transition.Root
        show={isPaletteOpen}
        as={React.Fragment}
        afterLeave={() => setQuery("")}
        appear
      >
        <Dialog as="div" className="relative z-10" onClose={handleCommandPaletteClose}>
          <Transition.Child
            as={React.Fragment}
            enter="ease-out duration-300"
            enterFrom="opacity-0"
            enterTo="opacity-100"
            leave="ease-in duration-200"
            leaveFrom="opacity-100"
            leaveTo="opacity-0"
          >
            <div className="fixed inset-0 bg-gray-500 bg-opacity-25 transition-opacity" />
          </Transition.Child>

          <div className="fixed inset-0 z-10 overflow-y-auto p-4 sm:p-6 md:p-20">
            <Transition.Child
              as={React.Fragment}
              enter="ease-out duration-300"
              enterFrom="opacity-0 scale-95"
              enterTo="opacity-100 scale-100"
              leave="ease-in duration-200"
              leaveFrom="opacity-100 scale-100"
              leaveTo="opacity-0 scale-95"
            >
              <Dialog.Panel className="mx-auto max-w-2xl transform divide-y divide-gray-500 divide-opacity-10 overflow-hidden rounded-xl bg-white bg-opacity-80 shadow-2xl ring-1 ring-black ring-opacity-5 backdrop-blur backdrop-filter transition-all">
                <Combobox
                  onChange={(item: ItemType) => {
                    const { url, onClick } = item;
                    if (url) router.push(url);
                    else if (onClick) onClick();
                    handleCommandPaletteClose();
                  }}
                >
                  <div className="relative m-1">
                    <MagnifyingGlassIcon
                      className="pointer-events-none absolute top-3.5 left-4 h-5 w-5 text-gray-900 text-opacity-40"
                      aria-hidden="true"
                    />
                    <Combobox.Input
                      className="h-12 w-full border-0 bg-transparent pl-11 pr-4 text-gray-900 placeholder-gray-500 focus:ring-0 sm:text-sm outline-none"
                      placeholder="Search..."
                      onChange={(event) => setQuery(event.target.value)}
                    />
                  </div>

                  <Combobox.Options
                    static
                    className="max-h-80 scroll-py-2 divide-y divide-gray-500 divide-opacity-10 overflow-y-auto"
                  >
                    {filteredIssues.length > 0 && (
                      <>
                        <li className="p-2">
                          {query === "" && (
                            <h2 className="mt-4 mb-2 px-3 text-xs font-semibold text-gray-900">
                              Issues
                            </h2>
                          )}
                          <ul className="text-sm text-gray-700">
                            {filteredIssues.map((issue) => (
                              <Combobox.Option
                                key={issue.id}
                                value={{
                                  name: issue.name,
                                  url: `/projects/${issue.project}/issues/${issue.id}`,
                                }}
                                className={({ active }) =>
                                  classNames(
                                    "flex cursor-pointer select-none items-center rounded-md px-3 py-2",
                                    active ? "bg-gray-900 bg-opacity-5 text-gray-900" : ""
                                  )
                                }
                              >
                                {({ active }) => (
                                  <>
                                    <FolderIcon
                                      className={classNames(
                                        "h-6 w-6 flex-none text-gray-900 text-opacity-40",
                                        active ? "text-opacity-100" : ""
                                      )}
                                      aria-hidden="true"
                                    />
                                    <span className="ml-3 flex-auto truncate">{issue.name}</span>
                                    {active && (
                                      <span className="ml-3 flex-none text-gray-500">
                                        Jump to...
                                      </span>
                                    )}
                                  </>
                                )}
                              </Combobox.Option>
                            ))}
                          </ul>
                        </li>
                      </>
                    )}
                    {query === "" && (
                      <li className="p-2">
                        <h2 className="sr-only">Quick actions</h2>
                        <ul className="text-sm text-gray-700">
                          {quickActions.map((action) => (
                            <Combobox.Option
                              key={action.shortcut}
                              value={{
                                name: action.name,
                                onClick: action.onClick,
                              }}
                              className={({ active }) =>
                                classNames(
                                  "flex cursor-default select-none items-center rounded-md px-3 py-2",
                                  active ? "bg-gray-900 bg-opacity-5 text-gray-900" : ""
                                )
                              }
                            >
                              {({ active }) => (
                                <>
                                  <action.icon
                                    className={classNames(
                                      "h-6 w-6 flex-none text-gray-900 text-opacity-40",
                                      active ? "text-opacity-100" : ""
                                    )}
                                    aria-hidden="true"
                                  />
                                  <span className="ml-3 flex-auto truncate">{action.name}</span>
                                  <span className="ml-3 flex-none text-xs font-semibold text-gray-500">
                                    <kbd className="font-sans">⌘</kbd>
                                    <kbd className="font-sans">{action.shortcut}</kbd>
                                  </span>
                                </>
                              )}
                            </Combobox.Option>
                          ))}
                        </ul>
                      </li>
                    )}
                  </Combobox.Options>

                  {query !== "" && filteredIssues.length === 0 && (
                    <div className="py-14 px-6 text-center sm:px-14">
                      <FolderIcon
                        className="mx-auto h-6 w-6 text-gray-900 text-opacity-40"
                        aria-hidden="true"
                      />
                      <p className="mt-4 text-sm text-gray-900">
                        We couldn{"'"}t find any issue with that term. Please try again.
                      </p>
                    </div>
                  )}
                </Combobox>
              </Dialog.Panel>
            </Transition.Child>
          </div>
        </Dialog>
      </Transition.Root>
    </>
  );
};

export default CommandPalette;