import React, { useEffect, useRef, useState } from "react";

import { useRouter } from "next/router";

import useSWR, { mutate } from "swr";

// headless ui
import { Dialog, Transition } from "@headlessui/react";
// icons
import { ExclamationTriangleIcon } from "@heroicons/react/24/outline";
// services
import stateServices from "services/state.service";
import issuesServices from "services/issues.service";
// hooks
import useToast from "hooks/use-toast";
// ui
import { Button } from "components/ui";
// helpers
import { groupBy } from "helpers/array.helper";
// types
import type { IState } from "types";
// fetch-keys
import { STATE_LIST, PROJECT_ISSUES_LIST } from "constants/fetch-keys";

type Props = {
  isOpen: boolean;
  onClose: () => void;
  data: IState | null;
};

export const DeleteStateModal: React.FC<Props> = ({ isOpen, onClose, data }) => {
  const [isDeleteLoading, setIsDeleteLoading] = useState(false);
  const [issuesWithThisStateExist, setIssuesWithThisStateExist] = useState(true);

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

  const { setToastAlert } = useToast();

  const { data: issues } = useSWR(
    workspaceSlug && projectId
      ? PROJECT_ISSUES_LIST(workspaceSlug as string, projectId as string)
      : null,
    workspaceSlug && projectId
      ? () => issuesServices.getIssues(workspaceSlug as string, projectId as string)
      : null
  );

  const cancelButtonRef = useRef(null);

  const handleClose = () => {
    onClose();
    setIsDeleteLoading(false);
  };

  const handleDeletion = async () => {
    setIsDeleteLoading(true);
    if (!data || !workspaceSlug || issuesWithThisStateExist) return;
    await stateServices
      .deleteState(workspaceSlug as string, data.project, data.id)
      .then(() => {
        mutate(STATE_LIST(data.project));
        handleClose();

        setToastAlert({
          title: "Success",
          type: "success",
          message: "State deleted successfully",
        });
      })
      .catch((error) => {
        console.log(error);
        setIsDeleteLoading(false);
      });
  };

  const groupedIssues = groupBy(issues?.results ?? [], "state");

  useEffect(() => {
    if (data) setIssuesWithThisStateExist(!!groupedIssues[data.id]);
  }, [groupedIssues, data]);

  return (
    <Transition.Root show={isOpen} as={React.Fragment}>
      <Dialog
        as="div"
        className="relative z-20"
        initialFocus={cancelButtonRef}
        onClose={handleClose}
      >
        <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-75 transition-opacity" />
        </Transition.Child>

        <div className="fixed inset-0 z-20 overflow-y-auto">
          <div className="flex min-h-full items-end justify-center p-4 text-center sm:items-center sm:p-0">
            <Transition.Child
              as={React.Fragment}
              enter="ease-out duration-300"
              enterFrom="opacity-0 translate-y-4 sm:translate-y-0 sm:scale-95"
              enterTo="opacity-100 translate-y-0 sm:scale-100"
              leave="ease-in duration-200"
              leaveFrom="opacity-100 translate-y-0 sm:scale-100"
              leaveTo="opacity-0 translate-y-4 sm:translate-y-0 sm:scale-95"
            >
              <Dialog.Panel className="relative transform overflow-hidden rounded-lg bg-white text-left shadow-xl transition-all sm:my-8 sm:w-full sm:max-w-lg">
                <div className="bg-white px-4 pt-5 pb-4 sm:p-6 sm:pb-4">
                  <div className="sm:flex sm:items-start">
                    <div className="mx-auto flex h-12 w-12 flex-shrink-0 items-center justify-center rounded-full bg-red-100 sm:mx-0 sm:h-10 sm:w-10">
                      <ExclamationTriangleIcon
                        className="h-6 w-6 text-red-600"
                        aria-hidden="true"
                      />
                    </div>
                    <div className="mt-3 text-center sm:mt-0 sm:ml-4 sm:text-left">
                      <Dialog.Title as="h3" className="text-lg font-medium leading-6 text-gray-900">
                        Delete State
                      </Dialog.Title>
                      <div className="mt-2">
                        <p className="text-sm text-gray-500">
                          Are you sure you want to delete state - {`"`}
                          <span className="italic">{data?.name}</span>
                          {`"`} ? All of the data related to the state will be permanently removed.
                          This action cannot be undone.
                        </p>
                      </div>
                      <div className="mt-2">
                        {issuesWithThisStateExist && (
                          <p className="text-sm text-red-500">
                            There are issues with this state. Please move them to another state
                            before deleting this state.
                          </p>
                        )}
                      </div>
                    </div>
                  </div>
                </div>
                <div className="bg-gray-50 px-4 py-3 sm:flex sm:flex-row-reverse sm:px-6">
                  <Button
                    type="button"
                    onClick={handleDeletion}
                    theme="danger"
                    disabled={isDeleteLoading || issuesWithThisStateExist}
                    className="inline-flex sm:ml-3"
                  >
                    {isDeleteLoading ? "Deleting..." : "Delete"}
                  </Button>
                  <Button
                    type="button"
                    theme="secondary"
                    className="inline-flex sm:ml-3"
                    onClick={handleClose}
                    ref={cancelButtonRef}
                  >
                    Cancel
                  </Button>
                </div>
              </Dialog.Panel>
            </Transition.Child>
          </div>
        </div>
      </Dialog>
    </Transition.Root>
  );
};