import React, { useEffect, useState, useReducer, useRef } from 'react';
import PropTypes from 'prop-types';
import { get, isEmpty } from 'lodash';
import { Modal, ModalFooter, PopUpWarning, useGlobalContext, request } from 'strapi-helper-plugin';
import { Button } from '@buffetjs/core';
import pluginId from '../../pluginId';
import { getTrad } from '../../utils';
import ModalHeader from '../../components/ModalHeader';
import stepper from './stepper';
import init from './init';
import reducer, { initialState } from './reducer';

const ModalStepper = ({
  initialFileToEdit,
  initialStep,
  isOpen,
  onClosed,
  onDeleteMedia,
  onToggle,
}) => {
  const { formatMessage } = useGlobalContext();
  const [isWarningDeleteOpen, setIsWarningDeleteOpen] = useState(false);
  const [shouldDeleteFile, setShouldDeleteFile] = useState(false);
  const [isFormDisabled, setIsFormDisabled] = useState(false);
  const [displayNextButton, setDisplayNextButton] = useState(false);
  const [reducerState, dispatch] = useReducer(reducer, initialState, init);
  const { currentStep, fileToEdit, filesToDownload, filesToUpload } = reducerState.toJS();
  const { Component, components, headerBreadcrumbs, next, prev, withBackButton } = stepper[
    currentStep
  ];
  const filesToUploadLength = filesToUpload.length;
  const toggleRef = useRef(onToggle);
  const editModalRef = useRef();

  useEffect(() => {
    // if (currentStep === 'upload' && filesToUploadLength === 0) {
    //   // Passing true to the onToggle prop will refetch the data when the modal closes
    //   toggleRef.current(true);
    // }
  }, [filesToUploadLength, currentStep]);

  useEffect(() => {
    if (isOpen) {
      goTo(initialStep);

      if (initialFileToEdit) {
        dispatch({
          type: 'INIT_FILE_TO_EDIT',
          fileToEdit: initialFileToEdit,
        });
      }
    }
    // Disabling the rule because we just want to let the ability to open the modal
    // at a specific step then we will let the stepper handle the navigation
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [isOpen]);

  const addFilesToUpload = ({ target: { value } }) => {
    dispatch({
      type: 'ADD_FILES_TO_UPLOAD',
      filesToUpload: value,
    });

    goTo(next);
  };

  const handleAbortUpload = () => {
    const { abortController } = fileToEdit;

    abortController.abort();

    dispatch({
      type: 'ON_ABORT_UPLOAD',
    });
  };

  const handleCancelFileToUpload = fileOriginalIndex => {
    const fileToCancel = filesToUpload.find(file => file.originalIndex === fileOriginalIndex);

    // Cancel upload
    fileToCancel.abortController.abort();

    dispatch({
      type: 'REMOVE_FILE_TO_UPLOAD',
      fileIndex: fileOriginalIndex,
    });
  };

  const handleChange = ({ target: { name, value } }) => {
    let val = value;
    let type = 'ON_CHANGE';

    if (name === 'url') {
      val = value.split('\n');
      type = 'ON_CHANGE_URLS_TO_DOWNLOAD';
    }

    dispatch({
      type,
      keys: name,
      value: val,
    });
  };

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

  const handleClickNextButton = () => {
    // Navigate to next step
    // goNext();
    // validate the form
  };

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

  const handleClickDeleteFileToUpload = fileIndex => {
    dispatch({
      type: 'REMOVE_FILE_TO_UPLOAD',
      fileIndex,
    });

    if (currentStep === 'edit-new') {
      dispatch({
        type: 'RESET_FILE_TO_EDIT',
      });

      goNext();
    }
  };

  const handleClose = () => {
    onClosed();
    setIsFormDisabled(false);
    setDisplayNextButton(false);

    dispatch({
      type: 'RESET_PROPS',
    });
  };

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

      onDeleteMedia(id);
    }
  };

  const handleGoToEditNewFile = fileIndex => {
    dispatch({
      type: 'SET_FILE_TO_EDIT',
      fileIndex,
    });

    goTo('edit-new');
  };

  const handleGoToAddBrowseFiles = () => {
    dispatch({
      type: 'CLEAN_FILES_ERROR',
    });

    goBack();
  };

  const handleSetCropResult = blob => {
    dispatch({
      type: 'SET_CROP_RESULT',
      blob,
    });
  };

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

    dispatch({
      type: 'ON_SUBMIT_EDIT_NEW_FILE',
    });

    goNext();
  };

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

    dispatch({
      type: 'ON_SUBMIT_EDIT_EXISTING_FILE',
    });

    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 {
      await request(
        requestURL,
        {
          method: 'POST',
          headers,
          body: formData,
          signal: abortController.signal,
        },
        false,
        false
      );
      // Close the modal and refetch data
      toggleRef.current(true);
    } catch (err) {
      console.log(err);
    }
  };

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

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

      if (!confirm) {
        return;
      }
    }

    onToggle();
  };

  const handleUploadFiles = async () => {
    dispatch({
      type: 'SET_FILES_UPLOADING_STATE',
    });

    const requests = filesToUpload.map(
      async ({ file, fileInfo, originalIndex, abortController }) => {
        const formData = new FormData();
        const headers = {};
        formData.append('files', file);
        formData.append('fileInfo', JSON.stringify(fileInfo));

        try {
          await request(
            `/${pluginId}`,
            {
              method: 'POST',
              headers,
              body: formData,
              signal: abortController.signal,
            },
            false,
            false
          );

          dispatch({
            type: 'REMOVE_FILE_TO_UPLOAD',
            fileIndex: originalIndex,
          });
        } catch (err) {
          const errorMessage = get(
            err,
            ['response', 'payload', 'message', '0', 'messages', '0', 'message'],
            get(err, ['response', 'payload', 'message'], null)
          );

          if (errorMessage) {
            dispatch({
              type: 'SET_FILE_ERROR',
              fileIndex: originalIndex,
              errorMessage,
            });
          }
        }
      }
    );

    await Promise.all(requests);
  };

  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);
  };

  const goTo = to => {
    dispatch({
      type: 'GO_TO',
      to,
    });
  };

  const toggleModalWarning = () => {
    setIsWarningDeleteOpen(prev => !prev);
  };

  const shouldDisplayNextButton = currentStep === 'browse' && displayNextButton;

  return (
    <>
      <Modal isOpen={isOpen} onToggle={handleToggle} onClosed={handleClose}>
        {/* header title */}
        <ModalHeader
          goBack={goBack}
          headerBreadcrumbs={headerBreadcrumbs}
          withBackButton={withBackButton}
        />

        {/* body of the modal */}
        {Component && (
          <Component
            onAbortUpload={handleAbortUpload}
            addFilesToUpload={addFilesToUpload}
            fileToEdit={fileToEdit}
            filesToDownload={filesToDownload}
            filesToUpload={filesToUpload}
            components={components}
            isEditingUploadedFile={currentStep === 'edit'}
            isFormDisabled={isFormDisabled}
            onChange={handleChange}
            onClickCancelUpload={handleCancelFileToUpload}
            onClickDeleteFileToUpload={
              currentStep === 'edit' ? handleClickDeleteFile : handleClickDeleteFileToUpload
            }
            onClickEditNewFile={handleGoToEditNewFile}
            onGoToAddBrowseFiles={handleGoToAddBrowseFiles}
            onSubmitEdit={
              currentStep === 'edit' ? handleSubmitEditExistingFile : handleSubmitEditNewFile
            }
            onToggle={handleToggle}
            toggleDisableForm={setIsFormDisabled}
            ref={currentStep === 'edit' ? editModalRef : null}
            setCropResult={handleSetCropResult}
            setShouldDisplayNextButton={setDisplayNextButton}
            withBackButton={withBackButton}
          />
        )}

        <ModalFooter>
          <section>
            <Button type="button" color="cancel" onClick={handleToggle}>
              {formatMessage({ id: 'app.components.Button.cancel' })}
            </Button>
            {shouldDisplayNextButton && (
              <Button
                type="button"
                color="primary"
                onClick={handleClickNextButton}
                disabled={isEmpty(filesToDownload)}
              >
                Next
              </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>
            )}
          </section>
        </ModalFooter>
      </Modal>
      <PopUpWarning
        onClosed={handleCloseModalWarning}
        isOpen={isWarningDeleteOpen}
        toggleModal={toggleModalWarning}
        popUpWarningType="danger"
        onConfirm={handleConfirmDeleteFile}
      />
    </>
  );
};

ModalStepper.defaultProps = {
  initialFileToEdit: null,
  initialStep: 'browse',
  onClosed: () => {},
  onDeleteMedia: () => {},
  onToggle: () => {},
};

ModalStepper.propTypes = {
  initialFileToEdit: PropTypes.object,
  initialStep: PropTypes.string,
  isOpen: PropTypes.bool.isRequired,
  onClosed: PropTypes.func,
  onDeleteMedia: PropTypes.func,
  onToggle: PropTypes.func,
};

export default ModalStepper;