import React, {Component} from 'react';

import ReactQuill from 'react-quill';
import Delta from 'quill-delta';
import PropTypes from 'prop-types';

import './Console.css';
import Territory from './gme/BaseComponents/Territory';

class OTConsole extends Component {
    static propTypes = {
        gmeClient: PropTypes.object.isRequired,
        attributeName: PropTypes.string.isRequired,
        nodeId: PropTypes.string,
        branchName: PropTypes.string,
    };

    static defaultProps = {
        nodeId: null,
        branchName: 'master',
    }

    constructor(props) {
        super(props);

        const {gmeClient} = this.props;

        this.state.project = gmeClient.getProjectObject();
    }

    state = {
        project: null,
        delta: new Delta(),
        document: null,
        attributeValue: null,
        docId: null,
        watcherId: null,
    };

    componentWillUnmount() {
        const {project, docId, watcherId} = this.state;
        if (project && docId) {
            project.unwatchDocument({docId, watcherId});
        }
    }

    onTerritoryUpdate = (hash, loads, updates/* , unloads */) => {
        const {
            branchName, nodeId, gmeClient, attributeName,
        } = this.props;

        const {
            delta, attributeValue, document, project,
        } = this.state;

        const newState = {};
        let nodeObj;
        let haveUpdated = false;

        if (loads.indexOf(nodeId) !== -1) {
            // initializing
            nodeObj = gmeClient.getNode(nodeId);
            newState.attributeValue = nodeObj.getAttribute(attributeName);
            newState.delta = delta.insert(newState.attributeValue);
            if (document === null) {
                project.watchDocument({
                    branchName,
                    nodeId,
                    attrName: attributeName,
                    attrValue: newState.attributeValue,
                }, this.atOperation, this.atSelection)
                    .then((initData) => {
                        this.setState({
                            docId: initData.docId,
                            document: initData.document,
                            watcherId: initData.watcherId,
                        });
                    });

                newState.document = newState.attributeValue;
            }

            haveUpdated = true;
        } else if (updates.indexOf(nodeId) !== -1) {
            nodeObj = gmeClient.getNode(nodeId);
            newState.attributeValue = nodeObj.getAttribute(attributeName);

            if (newState.attributeValue !== attributeValue) {
                newState.delta = delta.delete(delta.length()).insert(newState.attributeValue);
                newState.document = newState.attributeValue;
                haveUpdated = true;
            }
        }

        if (haveUpdated) {
            this.setState(newState);
        }
    };

    atOperation = (operation) => {
        this.setState({document: operation.apply(this.state.document)});
    };

    atSelection = () => {
    };

    render() {
        const {gmeClient, nodeId} = this.props;
        const {document} = this.state;

        return (
            <div style={{
                backgroundColor: '#002b36',
                height: 'calc(100% - 20px)',
                width: 'calc(100% - 20px)',
                padding: 10,
                overflow: 'auto',
            }}
            >
                {nodeId ? <Territory
                    gmeClient={gmeClient}
                    onlyActualEvents
                    onUpdate={this.onTerritoryUpdate}
                    territory={{[nodeId]: {children: 0}}}
                /> : <div/>}
                <ReactQuill
                    style={{
                        backgroundColor: '#002b36',
                        color: '#a5cfda',
                        fontSize: 12,
                        fontFamily: 'monospace',
                    }}
                    theme={null}
                    value={(document || '').replace(/\n/g, '<br>')}
                    readOnly
                />
            </div>);
    }
}

export default OTConsole;