import React from 'react';
import { connect } from 'react-redux';

export default connect(
    (state, ownProps) => ownProps,
    (dispatch) => ({
        uploadImage: (file, dataUrl, filename, progress) => {
            dispatch({
                type: 'user/UPLOAD_IMAGE',
                payload: { file, dataUrl, filename, progress },
            });
        },
    })
)(
    class Image extends React.Component {
        constructor(props) {
            super(props);

            this.state = state = {
                progress: {},
            };

            const file = this.props.node.data.get('file');
            // Save `file` for "Retry"
            // Try to load incase data url was loaded from a draft
            this.setState({ file });
        }

        componentDidMount() {
            console.log('** image mounted..', this.state, this.props);
            this.load();
        }

        setImageSrc(src, filename) {
            const { editor, node } = this.props;
            const state = editor.getState();
            const next = state
                .transform()
                .setNodeByKey(node.key, { data: { src, alt: filename } })
                .apply();
            editor.onChange(next);
        }

        load = () => {
            let dataUrl, filename;
            const { file } = this.state;
            if (file) {
                // image dropped -- show a quick preview
                console.log('** image being loaded.. ----->', file);
                const reader = new FileReader();
                reader.addEventListener('load', () => {
                    dataUrl = reader.result;
                    this.setImageSrc(dataUrl, file.name);
                });
                reader.readAsDataURL(file);
                filename = file.name;
            } else {
                // draft, recover data using the preview data url
                const { data } = this.props.node;
                const src = data.get('src');
                if (/^data:/.test(src)) {
                    dataUrl = src;
                    filename = data.get('alt');
                }
            }

            if (!file && !dataUrl) return;
            this.setState({ progress: {}, uploading: true }, () => {
                const { uploadImage } = this.props;
                uploadImage(file, dataUrl, filename, (progress) => {
                    this.setState({ progress, uploading: false });
                    if (progress.url) {
                        this.setImageSrc(progress.url, filename);
                    }
                });
            });
        };

        render() {
            const { node, state, attributes } = this.props;

            const isFocused = state.selection.hasEdgeIn(node);
            const className = isFocused ? 'active' : null;

            const prefix = $STM_Config.img_proxy_prefix ? $STM_Config.img_proxy_prefix + '0x0/' : '';

            const alt = node.data.get('alt');
            const src = node.data.get('src');

            console.log('** rendering image... src:', src ? src.substring(0, 30) + '...' : '(null)', state);

            if (!src) return <small className="info">Loading Image&hellip;</small>;

            if (/^https?:\/\//.test(src))
                return <img {...attributes} src={prefix + src} alt={alt} className={className} />;

            const img = <img src={src} alt={alt} className={className} />;

            const { uploading } = this.state;
            if (uploading)
                return (
                    <div {...attributes}>
                        {img}
                        <br />
                        <small className="info">Uploading Image&hellip;</small>
                    </div>
                );

            const { error } = this.state.progress;
            return (
                <div {...attributes}>
                    {img}
                    <div className="error">
                        <small>
                            Image was not Saved (<a onClick={this.load}>retry</a>)
                            <br />
                            {error}
                        </small>
                    </div>
                </div>
            );
        }
    }
);
