'use strict';

import { buildShareLink, buildShortShareLink, canShorten } from './BuildShareLink';
import classNames from 'classnames';
import Clipboard from '../../../Clipboard';
import createReactClass from 'create-react-class';
import defined from 'terriajs-cesium/Source/Core/defined';
import DropdownStyles from '../panel.scss';
import Icon from "../../../Icon.jsx";
import Loader from '../../../Loader';
import MenuPanel from '../../../StandardUserInterface/customizable/MenuPanel.jsx';
import ObserverModelMixin from '../../../ObserveModelMixin';
import PrintView from './PrintView';
import printWindow from '../../../../Core/printWindow';
import PropTypes from 'prop-types';
import React from 'react';
import Styles from './share-panel.scss';

const SharePanel = createReactClass({
    displayName: 'SharePanel',
    mixins: [ObserverModelMixin],

    propTypes: {
        terria: PropTypes.object,
        userPropWhiteList: PropTypes.array,
        advancedIsOpen: PropTypes.bool,
        shortenUrls: PropTypes.bool,
        viewState: PropTypes.object.isRequired
    },

    getDefaultProps() {
        return {
            advancedIsOpen: false,
            shortenUrls: false
        };
    },

    getInitialState() {
        return {
            isOpen: false,
            shortenUrls: this.props.shortenUrls && this.props.terria.getLocalProperty('shortenShareUrls'),
            shareUrl: '',
            creatingPrintView: false,
            creatingDownload: false
        };
    },

    componentDidMount() {
        if (this.props.terria.configParameters.interceptBrowserPrint) {
            window.addEventListener('beforeprint', this.beforeBrowserPrint, false);
            window.addEventListener('afterprint', this.afterBrowserPrint, false);

            const handlePrintMediaChange = evt => {
                if (evt.matches) {
                    this.beforeBrowserPrint();
                } else {
                    this.afterBrowserPrint();
                }
            };

            if (window.matchMedia) {
                const matcher = window.matchMedia('print');
                matcher.addListener(handlePrintMediaChange);
                this._unsubscribeFromPrintMediaChange = function () {
                    matcher.removeListener(handlePrintMediaChange);
                };
            }

            this._oldPrint = window.print;
            window.print = () => {
                this.print();
            };
        }
    },

    componentWillUnmount() {
        window.removeEventListener('beforeprint', this.beforeBrowserPrint, false);
        window.removeEventListener('afterprint', this.afterBrowserPrint, false);
        if (this._unsubscribeFromPrintMediaChange) {
            this._unsubscribeFromPrintMediaChange();
        }

        if (this._oldPrint) {
            window.print = this._oldPrint;
        }
    },

    beforeBrowserPrint() {
        this.afterBrowserPrint();
        this._message = document.createElement('div');
        this._message.innerText = 'For better printed results, please use ' + this.props.terria.appName + '\'s Print button instead of your web browser\'s print feature.';
        window.document.body.insertBefore(this._message, window.document.body.childNodes[0]);
    },

    afterBrowserPrint() {
        if (this._message) {
            window.document.body.removeChild(this._message);
            this._message = undefined;
        }
        this.changeOpenState(true);
    },

    advancedIsOpen() {
        return this.state.advancedIsOpen;
    },

    toggleAdvancedOptions(e) {
        this.setState((prevState) => ({
            advancedIsOpen: !prevState.advancedIsOpen
        }));
    },

    updateForShortening() {
        this.setState({
            shareUrl: ''
        });

        if (this.shouldShorten()) {
            this.setState({
                placeholder: 'Shortening...'
            });

            buildShortShareLink(this.props.terria)
                .then(shareUrl => this.setState({ shareUrl }))
                .otherwise(() => {
                    this.setUnshortenedUrl();
                    this.setState({
                        errorMessage: 'An error occurred while attempting to shorten the URL.  Please check your internet connection and try again.'
                    });
                });
        } else {
            this.setUnshortenedUrl();
        }
    },

    setUnshortenedUrl() {
        this.setState({
            shareUrl: buildShareLink(this.props.terria)
        });
    },

    isUrlShortenable() {
        return canShorten(this.props.terria);
    },

    shouldShorten() {
        const localStoragePref = this.props.terria.getLocalProperty('shortenShareUrls');

        return this.isUrlShortenable() && (localStoragePref || !defined(localStoragePref));
    },

    onShortenClicked(e) {
        if (this.shouldShorten()) {
            this.props.terria.setLocalProperty('shortenShareUrls', false);
        } else if (this.isUrlShortenable()) {
            this.props.terria.setLocalProperty('shortenShareUrls', true);
        } else {
            return;
        }

        this.updateForShortening();
        this.forceUpdate();
    },

    changeOpenState(open) {
        this.setState({
            isOpen: open
        });

        if (open) {
            this.updateForShortening();
        }
    },

    print() {
        this.createPrintView(true, true);
    },

    showPrintView() {
        this.createPrintView(false, false);
    },

    createPrintView(hidden, printAutomatically) {
        this.setState({
            creatingPrintView: true
        });

        let iframe;
        if (hidden) {
            iframe = document.createElement('iframe');
            document.body.appendChild(iframe);
        }

        PrintView.create({
            terria: this.props.terria,
            viewState: this.props.viewState,
            printWindow: iframe ? iframe.contentWindow : undefined,
            readyCallback: windowToPrint => {
                if (printAutomatically) {
                    printWindow(windowToPrint).otherwise(e => {
                        this.props.terria.error.raiseEvent(e);
                    }).always(() => {
                        if (iframe) {
                            document.body.removeChild(iframe);
                        }
                        if (hidden) {
                            this.setState({
                                creatingPrintView: false
                            });
                        }
                    });
                }
            },
            closeCallback: windowToPrint => {
                if (hidden) {
                    this.setState({
                        creatingPrintView: false
                    });
                }
            }
        });

        if (!hidden) {
            this.setState({
                creatingPrintView: false
            });
        }
    },

    renderContent() {
        const iframeCode = this.state.shareUrl.length ?
            `<iframe style="width: 720px; height: 600px; border: none;" src="${this.state.shareUrl}" allowFullScreen mozAllowFullScreen webkitAllowFullScreen></iframe>`
            : '';

        const shareUrlTextBox = <input className={Styles.shareUrlfield} type="text" value={this.state.shareUrl}
            placeholder={this.state.placeholder} readOnly
            onClick={e => e.target.select()} id='share-url' />;

        return (
            <div>
                <div className={Styles.clipboard}><Clipboard source={shareUrlTextBox} id='share-url' /></div>
                <div className={DropdownStyles.section}>
                    <div>Print Map</div>
                    <div className={Styles.explanation}>Open a printable version of this map.</div>
                    <div>
                        <button className={Styles.printButton} onClick={this.print} disabled={this.state.creatingPrintView}>Print</button>
                        <button className={Styles.printButton} onClick={this.showPrintView} disabled={this.state.creatingPrintView}>Show Print View</button>
                        <div className={Styles.printViewLoader}>
                            {this.state.creatingPrintView && <Loader message="Creating print view..." />}
                        </div>
                    </div>
                </div>
                <div className={classNames(DropdownStyles.section, Styles.shortenUrl)}>
                    <div className={Styles.btnWrapper}>
                        <button type='button' onClick={this.toggleAdvancedOptions} className={Styles.btnAdvanced}>
                            <span>Advanced options</span>
                            {this.advancedIsOpen() ? <Icon glyph={Icon.GLYPHS.opened} /> : <Icon glyph={Icon.GLYPHS.closed} />}
                        </button>
                    </div>
                    <If condition={this.advancedIsOpen()}>
                        <div className={DropdownStyles.section}>
                            <p className={Styles.paragraph}>To embed, copy this code to embed this map into an HTML page:</p>
                            <input className={Styles.field} type="text" readOnly placeholder={this.state.placeholder}
                                value={iframeCode}
                                onClick={e => e.target.select()} />
                        </div>
                        <If condition={this.isUrlShortenable()}>
                            <div className={classNames(DropdownStyles.section, Styles.shortenUrl)}>
                                <button onClick={this.onShortenClicked}>
                                    {this.shouldShorten() ? <Icon glyph={Icon.GLYPHS.checkboxOn} /> : <Icon glyph={Icon.GLYPHS.checkboxOff} />}
                                    Shorten the share URL using a web service
                        </button>
                            </div>
                        </If>
                    </If>
                </div>
            </div>);
    },

    renderDownloadFormatButton(format) {
        return (
            <button key={format.name} className={Styles.formatButton} onClick={this.download} disabled={this.state.creatingDownload}>{format.name}</button>
        );
    },

    render() {
        const dropdownTheme = {
            btn: Styles.btnShare,
            outer: Styles.sharePanel,
            inner: Styles.dropdownInner,
            icon: 'share'
        };

        return (
            <div>
                <MenuPanel theme={dropdownTheme}
                    btnText="Share"
                    viewState={this.props.viewState}
                    btnTitle="Share your map with others"
                    isOpen={this.state.isOpen}
                    onOpenChanged={this.changeOpenState}
                    smallScreen={this.props.viewState.useSmallScreenInterface}>
                    <If condition={this.state.isOpen}>
                        {this.renderContent()}
                    </If>
                </MenuPanel>
            </div>
        );
    },
});

export default SharePanel;