import React, { useEffect, useState, useRef, memo } from 'react';
import PropTypes from 'prop-types';
import { Modal, ModalFooter, PopUpWarning, useGlobalContext, request } from 'strapi-helper-plugin';
import { Button } from '@buffetjs/core';

import { getRequestUrl, getTrad } from '../../utils';
import ModalHeader from '../../components/ModalHeader';
import pluginId from '../../pluginId';
import stepper from './stepper';
import useModalContext from '../../hooks/useModalContext';

const InputModalStepper = ({ isOpen, onToggle, onInputMediaChange }) => {
  const { formatMessage } = useGlobalContext();
  const [shouldDeleteFile, setShouldDeleteFile] = useState(false);
  const {
    addFilesToUpload,
    currentStep,
    fetchMediaLib,
    filesToUpload,
    fileToEdit,
    goTo,
    handleAbortUpload,
    handleCancelFileToUpload,
    handleCleanFilesError,
    handleClose,
    handleEditExistingFile,
    handleFileSelection,
    handleFileToEditChange,
    handleFormDisabled,
    handleGoToEditNewFile,
    handleRemoveFileToUpload,
    handleResetFileToEdit,
    handleSetCropResult,
    handleUploadFiles,
    isFormDisabled,
    isWarningDeleteOpen,
    multiple,
    selectedFiles,
    submitEditExistingFile,
    toggleModalWarning,
  } = useModalContext();
  const {
    Component,
    components,
    headerBreadcrumbs,
    next,
    prev,
    withBackButton,
    HeaderComponent,
  } = stepper[currentStep];
  const filesToUploadLength = filesToUpload.length;
  const editModalRef = useRef();

  const handleReplaceMedia = () => {
    editModalRef.current.click();
  };

  useEffect(() => {
    if (currentStep === 'upload' && filesToUploadLength === 0) {
      // Go to the modal list view when file uploading is over
      goToList();
    }
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [filesToUploadLength, currentStep]);

  const goToList = () => {
    fetchMediaLib();
    goTo('list');
  };

  const handleConfirmDeleteFile = () => {
    setShouldDeleteFile(true);
    toggleModalWarning();
  };

  const addFilesToUploadList = ({ target: { value } }) => {
    addFilesToUpload({ target: { value } });

    goNext();
  };

  const handleClickDeleteFile = async () => {
    toggleModalWarning();
  };

  const handleClickDeleteFileToUpload = fileIndex => {
    handleRemoveFileToUpload(fileIndex);

    if (currentStep === 'edit-new') {
      handleResetFileToEdit();

      goNext();
    }
  };

  const handleGoToAddBrowseFiles = () => {
    handleCleanFilesError();

    goBack();
  };

  const handleSubmitEditNewFile = e => {
    e.preventDefault();
    goNext();
  };

  const handleSubmit = e => {
    e.preventDefault();
    onInputMediaChange(multiple ? selectedFiles : selectedFiles[0]);
    goNext();
  };

  const handleCloseModalWarning = async () => {
    if (shouldDeleteFile) {
      const { id } = fileToEdit;

      try {
        const requestURL = getRequestUrl(`files/${id}`);

        await request(requestURL, { method: 'DELETE' });

        setShouldDeleteFile(false);

        // Remove file from selected files on delete and go back to the list.
        handleFileSelection({ target: { name: id } });
        goToList();
      } catch (err) {
        console.log(err);
      }
    }
  };

  const handleSubmitEditExistingFile = async (
    e,
    shouldDuplicateMedia = false,
    file = fileToEdit.file
  ) => {
    e.preventDefault();

    submitEditExistingFile();

    const headers = {};
    const formData = new FormData();

    // If the file has been cropped we need to add it to the formData
    // otherwise we just don't send it
    const didCropFile = file instanceof File;
    const { abortController, id, fileInfo } = fileToEdit;
    const requestURL = shouldDuplicateMedia ? `/${pluginId}` : `/${pluginId}?id=${id}`;

    if (didCropFile) {
      formData.append('files', file);
    }

    formData.append('fileInfo', JSON.stringify(fileInfo));

    try {
      const editedFile = await request(
        requestURL,
        {
          method: 'POST',
          headers,
          body: formData,
          signal: abortController.signal,
        },
        false,
        false
      );

      handleEditExistingFile(editedFile);
      goToList();
    } catch (err) {
      console.log(err);
    }
  };

  const handleToggle = () => {
    if (filesToUploadLength > 0 || selectedFiles.length > 0) {
      // eslint-disable-next-line no-alert
      const confirm = window.confirm(formatMessage({ id: getTrad('window.confirm.close-modal') }));

      if (!confirm) {
        return;
      }
    }

    onToggle();
  };

  const goBack = () => {
    goTo(prev);
  };

  // FIXME: when back button needed
  // eslint-disable-next-line no-unused-vars
  const goNext = () => {
    if (next === null) {
      onToggle();

      return;
    }

    goTo(next);
  };

  return (
    <>
      <Modal isOpen={isOpen} onToggle={handleToggle} onClosed={handleClose}>
        {/* header title */}
        <ModalHeader
          goBack={goBack}
          HeaderComponent={HeaderComponent}
          headerBreadcrumbs={headerBreadcrumbs}
          withBackButton={withBackButton}
        />
        {/* body of the modal */}
        {Component && (
          <Component
            addFilesToUpload={addFilesToUploadList}
            components={components}
            filesToUpload={filesToUpload}
            fileToEdit={fileToEdit}
            isEditingUploadedFile={currentStep === 'edit'}
            isFormDisabled={isFormDisabled}
            onAbortUpload={handleAbortUpload}
            onChange={handleFileToEditChange}
            onClickCancelUpload={handleCancelFileToUpload}
            onClickDeleteFileToUpload={
              currentStep === 'edit' ? handleClickDeleteFile : handleClickDeleteFileToUpload
            }
            onSubmitEdit={
              currentStep === 'edit' ? handleSubmitEditExistingFile : handleSubmitEditNewFile
            }
            onClickEditNewFile={handleGoToEditNewFile}
            onGoToAddBrowseFiles={handleGoToAddBrowseFiles}
            onSubmitEditNewFile={handleSubmitEditNewFile}
            ref={currentStep === 'edit' ? editModalRef : null}
            toggleDisableForm={handleFormDisabled}
            onToggle={handleToggle}
            setCropResult={handleSetCropResult}
            withBackButton={withBackButton}
          />
        )}

        <ModalFooter>
          <section>
            <Button type="button" color="cancel" onClick={handleToggle}>
              {formatMessage({ id: 'app.components.Button.cancel' })}
            </Button>
            {currentStep === 'upload' && (
              <Button type="button" color="success" onClick={handleUploadFiles}>
                {formatMessage(
                  {
                    id: getTrad(
                      `modal.upload-list.footer.button.${
                        filesToUploadLength > 1 ? 'plural' : 'singular'
                      }`
                    ),
                  },
                  { number: filesToUploadLength }
                )}
              </Button>
            )}
            {currentStep === 'edit-new' && (
              <Button color="success" type="button" onClick={handleSubmitEditNewFile}>
                {formatMessage({ id: 'form.button.finish' })}
              </Button>
            )}
            {currentStep === 'edit' && (
              <div style={{ margin: 'auto 0' }}>
                <Button
                  disabled={isFormDisabled}
                  color="primary"
                  onClick={handleReplaceMedia}
                  style={{ marginRight: 10 }}
                >
                  Replace media
                </Button>

                <Button
                  disabled={isFormDisabled}
                  color="success"
                  type="button"
                  onClick={handleSubmitEditExistingFile}
                >
                  {formatMessage({ id: 'form.button.finish' })}
                </Button>
              </div>
            )}
            {currentStep === 'list' && (
              <Button color="success" type="button" onClick={handleSubmit}>
                {formatMessage({ id: 'form.button.finish' })}
              </Button>
            )}
          </section>
        </ModalFooter>
      </Modal>
      <PopUpWarning
        onClosed={handleCloseModalWarning}
        isOpen={isWarningDeleteOpen}
        toggleModal={toggleModalWarning}
        popUpWarningType="danger"
        onConfirm={handleConfirmDeleteFile}
      />
    </>
  );
};

InputModalStepper.defaultProps = {
  onToggle: () => {},
};

InputModalStepper.propTypes = {
  isOpen: PropTypes.bool.isRequired,
  onInputMediaChange: PropTypes.func.isRequired,
  onToggle: PropTypes.func,
};

export default memo(InputModalStepper);