import connectionManager from 'connectionManager';
import dom from 'dom';
import loading from 'loading';
import playbackManager from 'playbackManager';
import keyboardnavigation from 'keyboardnavigation';
import dialogHelper from 'dialogHelper';
import appHost from 'apphost';
import 'css!./style';
import 'material-icons';
import 'paper-icon-button-light';

export class BookPlayer {
    constructor() {
        this.name = 'Book Player';
        this.type = 'mediaplayer';
        this.id = 'bookplayer';
        this.priority = 1;
    }

    play(options) {
        loading.show();
        let elem = this.createMediaElement();
        return this.setCurrentSrc(elem, options);
    }

    stop() {
        let elem = this._mediaElement;
        let tocElement = this._tocElement;
        let rendition = this._rendition;

        if (elem) {
            dialogHelper.close(elem);
            this._mediaElement = null;
        }

        if (tocElement) {
            dialogHelper.close(tocElement);
            this._tocElement = null;
        }

        if (rendition) {
            rendition.destroy();
        }
    }

    onWindowKeyUp(e) {
        let key = keyboardnavigation.getKeyName(e);
        let rendition = this._rendition;
        let book = rendition.book;

        switch (key) {
            case 'l':
            case 'ArrowRight':
            case 'Right':
                book.package.metadata.direction === 'rtl' ? rendition.prev() : rendition.next();
                break;
            case 'j':
            case 'ArrowLeft':
            case 'Left':
                book.package.metadata.direction === 'rtl' ? rendition.next() : rendition.prev();
                break;
            case 'Escape':
                dialogHelper.close(this._mediaElement);
                if (this._tocElement) {
                    dialogHelper.close(this._tocElement);
                }
                break;
        }
    }

    onDialogClosed() {
        this.stop();
    }

    replaceLinks(contents, f) {
        let links = contents.querySelectorAll('a[href]');

        links.forEach((link) => {
            let href = link.getAttribute('href');

            link.onclick = function () {
                f(href);
                return false;
            };
        });
    }

    createMediaElement() {
        let elem = this._mediaElement;

        if (elem) {
            return elem;
        }

        elem = document.getElementById('bookPlayer');

        if (!elem) {
            elem = dialogHelper.createDialog({
                exitAnimationDuration: 400,
                size: 'fullscreen',
                autoFocus: false,
                scrollY: false,
                exitAnimation: 'fadeout',
                removeOnClose: true
            });
            elem.id = 'bookPlayer';

            let html = '';
            html += '<div class="topRightActionButtons">';
            html += '<button is="paper-icon-button-light" class="autoSize bookplayerButton btnBookplayerExit hide-mouse-idle-tv" tabindex="-1"><i class="material-icons bookplayerButtonIcon close"></i></button>';
            html += '</div>';
            html += '<div class="topLeftActionButtons">';
            html += '<button is="paper-icon-button-light" class="autoSize bookplayerButton btnBookplayerToc hide-mouse-idle-tv" tabindex="-1"><i class="material-icons bookplayerButtonIcon toc"></i></button>';
            html += '</div>';

            elem.innerHTML = html;

            elem.querySelector('.btnBookplayerExit').addEventListener('click', function () {
                dialogHelper.close(elem);
            });

            elem.querySelector('.btnBookplayerToc').addEventListener('click', function () {
                let rendition = this._rendition;
                if (rendition) {
                    let tocElement = dialogHelper.createDialog({
                        size: 'small',
                        autoFocus: false,
                        removeOnClose: true
                    });
                    tocElement.id = 'dialogToc';

                    let tocHtml = '<div class="topRightActionButtons">';
                    tocHtml += '<button is="paper-icon-button-light" class="autoSize bookplayerButton btnBookplayerTocClose hide-mouse-idle-tv" tabindex="-1"><span class="material-icons bookplayerButtonIcon close"></span></button>';
                    tocHtml += '</div>';
                    tocHtml += '<ul class="toc">';
                    rendition.book.navigation.forEach((chapter) => {
                        tocHtml += '<li>';
                        // Remove '../' from href
                        let link = chapter.href.startsWith('../') ? chapter.href.substr(3) : chapter.href;
                        tocHtml += `<a href="${rendition.book.path.directory + link}">${chapter.label}</a>`;
                        tocHtml += '</li>';
                    });
                    tocHtml += '</ul>';
                    tocElement.innerHTML = tocHtml;

                    tocElement.querySelector('.btnBookplayerTocClose').addEventListener('click', function () {
                        dialogHelper.close(tocElement);
                    });

                    this.replaceLinks(tocElement, (href) => {
                        let relative = rendition.book.path.relative(href);
                        rendition.display(relative);
                        dialogHelper.close(tocElement);
                    });

                    this._tocElement = tocElement;

                    dialogHelper.open(tocElement);
                }
            }.bind(this));

            dialogHelper.open(elem);

            elem.addEventListener('close', this.onDialogClosed.bind(this));
        }

        this._mediaElement = elem;

        return elem;
    }

    setCurrentSrc(elem, options) {
        let item = options.items[0];
        if (!item.Path.endsWith('.epub')) {
            return new Promise((resolve, reject) => {
                let errorDialog = dialogHelper.createDialog({
                    size: 'small',
                    autoFocus: false,
                    removeOnClose: true
                });

                errorDialog.innerHTML = '<h1 class="bookplayerErrorMsg">This book type is not supported yet</h1>';

                this.stop();

                dialogHelper.open(errorDialog);
                loading.hide();

                return resolve();
            });
        }
        let serverId = item.ServerId;
        let apiClient = connectionManager.getApiClient(serverId);

        const self = this;
        return new Promise(function (resolve, reject) {
            require(['epubjs'], function (epubjs) {
                let downloadHref = apiClient.getItemDownloadUrl(item.Id);
                let book = epubjs.default(downloadHref, {openAs: 'epub'});
                let rendition = book.renderTo(elem, {width: '100%', height: '97%'});

                self._currentSrc = downloadHref;
                self._rendition = rendition;
                return rendition.display().then(function () {
                    document.addEventListener('keyup', self.onWindowKeyUp.bind(self));

                    // FIXME: I don't really get why document keyup event is not triggered when epub is in focus
                    self._rendition.on('keyup', self.onWindowKeyUp.bind(self));

                    loading.hide();
                    return resolve();
                }, function () {
                    console.error('Failed to display epub');
                    return reject();
                });
            });
        });
    }

    canPlayMediaType(mediaType) {
        return (mediaType || '').toLowerCase() === 'book';
    }
}

export default BookPlayer;