import React from 'react';
import PropTypes from 'prop-types';
import { Editor } from 'react-draft-wysiwyg';
import { convertFromRaw, EditorState, convertToRaw } from 'draft-js';
import draftToHtml from 'draftjs-to-html';
import Dropzone from 'react-dropzone';
import { withStyles } from '@material-ui/core/styles';
import TextField from '@material-ui/core/TextField';
import Attachment from '@material-ui/icons/Attachment';
import FileIcon from '@material-ui/icons/Description';
import ActionDelete from '@material-ui/icons/Delete';
import Send from '@material-ui/icons/Send';
import EditorStyle from 'ba-styles/TextEditor.scss';
import css from 'ba-styles/Form.scss';
import 'ba-styles/vendors/react-draft-wysiwyg/react-draft-wysiwyg.css';
import { Button, Grid, Typography, Snackbar, IconButton } from '@material-ui/core';
import isImage from '../Forms/helpers/helpers.js';
import styles from './email-jss';


const content = {
  blocks: [{
    key: '637gr',
    text: 'Lorem ipsum dolor sit amet 😀',
    type: 'unstyled',
    depth: 0,
    inlineStyleRanges: [],
    entityRanges: [],
    data: {}
  }],
  entityMap: {}
};

class ComposeEmailForm extends React.Component {
  constructor(props) {
    super(props);
    const contentBlock = convertFromRaw(content);
    if (contentBlock) {
      const editorState = EditorState.createWithContent(contentBlock);
      this.state = {
        openSnackBar: false,
        errorMessage: '',
        files: [],
        editorState,
        emailContent: draftToHtml(convertToRaw(editorState.getCurrentContent())),
      };
    }
    this.onDrop = this.onDrop.bind(this);
  }

  onDrop(filesVal) {
    const { files } = this.state;
    let oldFiles = files;
    const filesLimit = 3;
    oldFiles = oldFiles.concat(filesVal);
    if (oldFiles.length > filesLimit) {
      console.log('Cannot upload more than ' + filesLimit + ' items.');
    } else {
      this.setState({ files: oldFiles });
    }
  }

  onEditorStateChange = editorState => {
    this.setState({
      editorState,
      emailContent: draftToHtml(convertToRaw(editorState.getCurrentContent()))
    });
  };

  onDropRejected() {
    this.setState({
      openSnackBar: true,
      errorMessage: 'File too big, max size is 3MB',
    });
  }

  handleRequestCloseSnackBar = () => {
    this.setState({
      openSnackBar: false,
    });
  };

  handleRemove(file, fileIndex) {
    const thisFiles = this.state.files;
    // This is to prevent memory leaks.
    window.URL.revokeObjectURL(file.preview);

    thisFiles.splice(fileIndex, 1);
    this.setState({ files: thisFiles });
  }

  handleSend = (to, subject, emailContent, files) => {
    this.props.sendEmail(to, subject, emailContent, files);
    this.setState({ emailContent: '', files: [] });
  };

  render() {
    const {
      classes,
      closeForm,
      to,
      subject,
      validMail,
      inputChange
    } = this.props;
    const {
      editorState,
      emailContent,
      files,
      openSnackBar,
      errorMessage,
    } = this.state;
    let dropzoneRef;
    const deleteBtn = (file, index) => (
      <div className="middle">
        <IconButton onClick={() => this.handleRemove(file, index)}>
          <ActionDelete className="removeBtn" />
        </IconButton>
      </div>
    );
    const previews = filesArray => filesArray.map((file, index) => {
      if (isImage(file)) {
        const base64Img = URL.createObjectURL(file);
        return (
          <div key={index.toString()} className={classes.item}>
            <div className="imageContainer col fileIconImg">
              <figure className="imgWrap"><img className="smallPreviewImg" src={base64Img} alt="preview" /></figure>
              {deleteBtn(file, index)}
            </div>
            <Typography noWrap variant="caption">{file.name}</Typography>
          </div>
        );
      }
      return (
        <div key={index.toString()} className={classes.item}>
          <div className="imageContainer col fileIconImg">
            <div className="fileWrap">
              <FileIcon className="smallPreviewImg" alt="preview" />
              {deleteBtn(file, index)}
            </div>
          </div>
          <Typography noWrap variant="caption">{file.name}</Typography>
        </div>
      );
    });
    const fileSizeLimit = 3000000;
    return (
      <div>
        <form>
          <section className={css.bodyForm}>
            <div>
              <TextField
                error={validMail === 'Invalid email'}
                id="to"
                label="To"
                helperText={validMail}
                className={classes.field}
                type="email"
                placeholder="To"
                value={to}
                onChange={(event) => inputChange(event, 'to')}
                margin="normal"
              />
            </div>
            <div>
              <TextField
                id="subject"
                label="Subject"
                className={classes.field}
                placeholder="Subject"
                value={subject}
                onChange={(event) => inputChange(event, 'subject')}
                margin="normal"
              />
            </div>
            <Grid container alignItems="center">
              <Dropzone
                className={classes.hiddenDropzone}
                acceptClassName="stripes"
                onDrop={this.onDrop}
                maxSize={fileSizeLimit}
                ref={(node) => { dropzoneRef = node; }}
              >
                {({ getRootProps, getInputProps }) => (
                  <div {...getRootProps()}>
                    <input {...getInputProps()} />
                  </div>
                )}
              </Dropzone>
              <Button
                className={classes.buttonUpload}
                color="secondary"
                component="button"
                onClick={() => {
                  dropzoneRef.open();
                }}
              >
                <Attachment />
                Attach Files
              </Button>
              &nbsp;
              <Typography variant="caption">(Max 3MB)</Typography>
            </Grid>
            <div className={classes.preview}>
              {previews(files)}
            </div>
            <div>
              <Editor
                editorState={editorState}
                editorClassName={EditorStyle.TextEditor}
                toolbarClassName={EditorStyle.ToolbarEditor}
                onEditorStateChange={this.onEditorStateChange}
                toolbar={{
                  options: ['inline', 'fontSize', 'fontFamily', 'colorPicker', 'image', 'emoji', 'list', 'textAlign', 'link'],
                  inline: { inDropdown: true },
                  color: true,
                  list: { inDropdown: true },
                  textAlign: { inDropdown: true },
                  link: { inDropdown: true },
                }}
              />
            </div>
          </section>
          <div className={css.buttonArea}>
            <Button type="button" onClick={() => closeForm()}>
              Discard
            </Button>
            <Button
              variant="contained"
              color="secondary"
              type="button"
              disabled={!to || !subject}
              onClick={() => this.handleSend(to, subject, emailContent, files)}
            >
              Send
              {' '}
              <Send className={classes.sendIcon} />
            </Button>
          </div>
        </form>
        <Snackbar
          open={openSnackBar}
          message={errorMessage}
          autoHideDuration={4000}
          onClose={this.handleRequestCloseSnackBar}
        />
      </div>
    );
  }
}

ComposeEmailForm.propTypes = {
  classes: PropTypes.object.isRequired,
  to: PropTypes.string.isRequired,
  subject: PropTypes.string.isRequired,
  validMail: PropTypes.string.isRequired,
  sendEmail: PropTypes.func.isRequired,
  closeForm: PropTypes.func.isRequired,
  inputChange: PropTypes.func.isRequired,
};

export default withStyles(styles)(ComposeEmailForm);