import React, {
  useCallback, useState, useRef, type JSX,
} from 'react';

import { useAtomValue, useSetAtom } from 'jotai';
import { useTranslation } from 'react-i18next';

import ImageCropModal from '~/client/components/Common/ImageCropModal';
import {
  apiv3Delete, apiv3PostForm, apiv3Put,
} from '~/client/util/apiv3-client';
import { toastError, toastSuccess } from '~/client/util/toastr';
import { useIsDefaultLogo } from '~/states/global';
import { isCustomizedLogoUploadedAtom } from '~/states/server-configurations';

import AdminUpdateButtonRow from '../Common/AdminUpdateButtonRow';


const DEFAULT_LOGO = '/images/logo.svg';
const CUSTOMIZED_LOGO = '/attachment/brand-logo';

const CustomizeLogoSetting = (): JSX.Element => {

  const { t } = useTranslation();
  const isDefaultLogo = useIsDefaultLogo();
  const isCustomizedLogoUploaded = useAtomValue(isCustomizedLogoUploadedAtom);
  const setIsCustomizedLogoUploaded = useSetAtom(isCustomizedLogoUploadedAtom);

  const [uploadLogoSrc, setUploadLogoSrc] = useState<ArrayBuffer | string | null>(null);
  const [isImageCropModalShow, setIsImageCropModalShow] = useState<boolean>(false);
  const [isDefaultLogoSelected, setIsDefaultLogoSelected] = useState<boolean>(isDefaultLogo ?? true);
  const [retrieveError, setRetrieveError] = useState<any>();
  const fileInputRef = useRef<HTMLInputElement | null>(null);
  const isUpdateButtonDisabled = retrieveError != null || (!isDefaultLogoSelected && uploadLogoSrc == null && !isCustomizedLogoUploaded);

  const onSelectFile = useCallback((e: React.ChangeEvent<HTMLInputElement>) => {
    const files = e.target.files;
    const hasFile = files != null && files.length > 0;

    if (hasFile) {
      const reader = new FileReader();
      reader.addEventListener('load', () => setUploadLogoSrc(reader.result));
      reader.readAsDataURL(files[0]);
      setIsImageCropModalShow(true);
    }
  }, [setUploadLogoSrc, setIsImageCropModalShow]);

  const onClickSubmit = useCallback(async () => {
    try {
      await apiv3Put('/customize-setting/customize-logo', { isDefaultLogo: isDefaultLogoSelected });
      toastSuccess(t('toaster.update_successed', { target: t('admin:customize_settings.custom_logo'), ns: 'commons' }));
    }
    catch (err) {
      toastError(err);
    }
  }, [t, isDefaultLogoSelected]);

  const clearFileInput = useCallback(() => {
    if (fileInputRef.current) {
      fileInputRef.current.value = '';
    }
  }, []);

  const onClickDeleteBtn = useCallback(async () => {
    try {
      await apiv3Delete('/customize-setting/delete-brand-logo');
      setIsCustomizedLogoUploaded(false);
      toastSuccess(t('toaster.update_successed', { target: t('admin:customize_settings.current_logo'), ns: 'commons' }));
      setUploadLogoSrc(null);
      setIsImageCropModalShow(false);
      clearFileInput();
    }
    catch (err) {
      toastError(err);
      setRetrieveError(err);
      throw new Error('Failed to delete logo');
    }
  }, [setIsCustomizedLogoUploaded, t, setUploadLogoSrc, setIsImageCropModalShow, clearFileInput, setRetrieveError]);

  const processImageCompletedHandler = useCallback(async (croppedImage) => {
    try {
      const formData = new FormData();
      formData.append('file', croppedImage);
      const response = await apiv3PostForm('/customize-setting/upload-brand-logo', formData);
      const newLogoUrl = response.data.attachment.filePathProxied;
      setUploadLogoSrc(newLogoUrl);
      setIsImageCropModalShow(false);
      setIsCustomizedLogoUploaded(true);
      toastSuccess(t('toaster.update_successed', { target: t('admin:customize_settings.current_logo'), ns: 'commons' }));
    }
    catch (err) {
      toastError(err);
      setRetrieveError(err);
      throw new Error('Failed to upload brand logo');
    }
  }, [setUploadLogoSrc, setIsCustomizedLogoUploaded, t, setIsImageCropModalShow, setRetrieveError]);

  const closeImageCropModalHandler = useCallback(() => {
    if (uploadLogoSrc !== null && typeof uploadLogoSrc !== 'string') {
      clearFileInput();
      setUploadLogoSrc(null);
    }
    setIsImageCropModalShow(false);
  }, [clearFileInput, setUploadLogoSrc, setIsImageCropModalShow, uploadLogoSrc]);


  return (
    <React.Fragment>
      <div className="row">
        <div className="col-12">
          <div className="mb-5">
            <h2 className="border-bottom my-4 admin-setting-header">{t('admin:customize_settings.custom_logo')}</h2>
            <div className="row">
              <div className="col-md-6 col-12 mb-3 mb-md-0">
                <h4>
                  <div className="form-check radio-primary">
                    <input
                      type="radio"
                      id="radioDefaultLogo"
                      className="form-check-input"
                      form="formImageType"
                      name="imagetypeForm[isDefaultLogo]"
                      checked={isDefaultLogoSelected}
                      onChange={() => { setIsDefaultLogoSelected(true) }}
                    />
                    <label className="form-check-label" htmlFor="radioDefaultLogo">
                      {t('admin:customize_settings.default_logo')}
                    </label>
                  </div>
                </h4>
                <img src={DEFAULT_LOGO} width="64" />
              </div>
              <div className="col-md-6 col-12">
                <h4>
                  <div className="form-check radio-primary">
                    <input
                      type="radio"
                      id="radioUploadLogo"
                      className="form-check-input"
                      form="formImageType"
                      name="imagetypeForm[isDefaultLogo]"
                      checked={!isDefaultLogoSelected}
                      onChange={() => { setIsDefaultLogoSelected(false) }}
                    />
                    <label className="form-check-label" htmlFor="radioUploadLogo">
                      {t('admin:customize_settings.upload_logo')}
                    </label>
                  </div>
                </h4>
                <div className="row mb-3">
                  <label className="col-sm-4 col-12 col-form-label text-start">
                    {t('admin:customize_settings.current_logo')}
                  </label>
                  <div className="col-sm-8 col-12">
                    {isCustomizedLogoUploaded && (
                      <>
                        <p>
                          <img src={CUSTOMIZED_LOGO} id="settingBrandLogo" width="64" />
                        </p>
                        <button type="button" className="btn btn-danger" onClick={onClickDeleteBtn}>
                          {t('admin:customize_settings.delete_logo')}
                        </button>
                      </>
                    )}
                  </div>
                </div>
                <div className="row">
                  <label className="col-sm-4 col-12 col-form-label text-start">
                    {t('admin:customize_settings.upload_new_logo')}
                  </label>
                  <div className="col-sm-8 col-12">
                    <input
                      type="file"
                      ref={fileInputRef}
                      onChange={onSelectFile}
                      name="brandLogo"
                      accept="image/*"
                    />
                  </div>
                </div>
              </div>
            </div>
            <AdminUpdateButtonRow
              onClick={onClickSubmit}
              disabled={isUpdateButtonDisabled}
            />
          </div>
        </div>
      </div>

      <ImageCropModal
        isShow={isImageCropModalShow}
        src={uploadLogoSrc}
        onModalClose={closeImageCropModalHandler}
        onImageProcessCompleted={processImageCompletedHandler}
        isCircular={false}
        showCropOption={false}
      />
    </React.Fragment>
  );


};


export default CustomizeLogoSetting;