/*
 * This file is part of the MediaWiki extension MultimediaViewer.
 *
 * MultimediaViewer is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * MultimediaViewer is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with MultimediaViewer.  If not, see <http://www.gnu.org/licenses/>.
 */

const Dialog = require( './mmv.ui.dialog.js' );

( function () {
	// Shortcut for prototype later
	var DP;

	/**
	 * Represents the file reuse dialog and the link to open it.
	 *
	 * @class ReuseDialog
	 * @extends Dialog
	 * @param {jQuery} $container the element to which the dialog will be appended
	 * @param {jQuery} $openButton the button which opens the dialog. Only used for positioning.
	 * @param {mw.mmv.Config} config
	 */
	function ReuseDialog( $container, $openButton, config ) {
		Dialog.call( this, $container, $openButton, config );

		/**
		 * @property {Object.<string, UiElement>} tabs List of tab ui objects.
		 */
		this.tabs = null;

		/**
		 * @property {Object.<string, OO.ui.MenuOptionWidget>} ooTabs List of tab OOUI objects.
		 */
		this.ooTabs = null;

		this.loadDependencies.push( 'mmv.ui.reuse.shareembed' );

		this.$dialog.addClass( 'mw-mmv-reuse-dialog' );

		this.eventPrefix = 'use-this-file';
	}

	OO.inheritClass( ReuseDialog, Dialog );
	DP = ReuseDialog.prototype;

	// FIXME this should happen outside the dialog and the tabs, but we need to improve
	DP.initTabs = function () {
		function makeTab( type ) {
			return new OO.ui.MenuOptionWidget( {
				data: type,
				// The following messages are used here:
				// * multimediaviewer-embed-tab
				// * multimediaviewer-share-tab
				label: mw.message( 'multimediaviewer-' + type + '-tab' ).text()
			} );
		}

		this.reuseTabs = new OO.ui.MenuSelectWidget( {
			autoHide: false,
			classes: [ 'mw-mmv-reuse-tabs' ]
		} );
		this.reuseTabs.$element.appendTo( this.$dialog );

		const { Embed, Share } = require( 'mmv.ui.reuse.shareembed' );
		this.tabs = {
			share: new Share( this.$dialog ),
			embed: new Embed( this.$dialog )
		};

		this.ooTabs = {
			share: makeTab( 'share' ),
			embed: makeTab( 'embed' )
		};

		this.reuseTabs.addItems( [
			this.ooTabs.share,
			this.ooTabs.embed
		] );

		// MenuSelectWidget has a nasty tendency to hide itself, maybe we're not using it right?
		this.reuseTabs.toggle( true );
		this.reuseTabs.toggle = function () {};

		this.selectedTab = this.getLastUsedTab();

		// In case nothing is saved in localStorage or it contains junk
		if ( !Object.prototype.hasOwnProperty.call( this.tabs, this.selectedTab ) ) {
			this.selectedTab = 'share';
		}

		this.reuseTabs.selectItem( this.ooTabs[ this.selectedTab ] );

		if ( this.dependenciesNeedToBeAttached ) {
			this.attachDependencies();
		}

		if ( this.tabsSetValues ) {
			// This is a delayed set() for the elements we've just created on demand
			this.tabs.share.set.apply( this.tabs.share, this.tabsSetValues.share );
			this.tabs.embed.set.apply( this.tabs.embed, this.tabsSetValues.embed );
			this.showImageWarnings( this.tabsSetValues.share[ 0 ] );
			this.tabsSetValues = undefined;
		}
	};

	DP.toggleDialog = function () {
		if ( this.tabs === null ) {
			this.initTabs();
		}

		Dialog.prototype.toggleDialog.call( this );
	};

	/**
	 * Handles tab selection.
	 *
	 * @param {OO.ui.MenuOptionWidget} option
	 */
	DP.handleTabSelection = function ( option ) {
		var tab;

		this.selectedTab = option.getData();

		for ( tab in this.tabs ) {
			if ( tab === this.selectedTab ) {
				this.tabs[ tab ].show();
			} else {
				this.tabs[ tab ].hide();
			}
		}

		this.config.setInLocalStorage( 'mmv-lastUsedTab', this.selectedTab );
	};

	/**
	 * @return {string} Last used tab
	 */
	DP.getLastUsedTab = function () {
		return this.config.getFromLocalStorage( 'mmv-lastUsedTab' );
	};

	/**
	 * Registers listeners.
	 */
	DP.attach = function () {
		this.handleEvent( 'mmv-reuse-open', this.handleOpenCloseClick.bind( this ) );

		this.handleEvent( 'mmv-download-open', this.closeDialog.bind( this ) );
		this.handleEvent( 'mmv-options-open', this.closeDialog.bind( this ) );

		this.attachDependencies();
	};

	/**
	 * Registrers listeners for dependencies loaded on demand
	 */
	DP.attachDependencies = function () {
		var tab, dialog = this;

		if ( this.reuseTabs && this.tabs ) {
			// This is a delayed attach() for the elements we've just created on demand
			this.reuseTabs.on( 'select', dialog.handleTabSelection.bind( dialog ) );

			for ( tab in this.tabs ) {
				this.tabs[ tab ].attach();
			}

			this.dependenciesNeedToBeAttached = false;
		} else {
			this.dependenciesNeedToBeAttached = true;
		}
	};

	/**
	 * Clears listeners.
	 */
	DP.unattach = function () {
		var tab;

		Dialog.prototype.unattach.call( this );

		if ( this.reuseTabs ) {
			this.reuseTabs.off( 'select' );
		}

		if ( this.tabs ) {
			for ( tab in this.tabs ) {
				this.tabs[ tab ].unattach();
			}
		}
	};

	/**
	 * Sets data needed by contained tabs and makes dialog launch link visible.
	 *
	 * @param {mw.mmv.model.Image} image
	 * @param {mw.mmv.model.Repo} repo
	 * @param {string} caption
	 * @param {string} alt
	 */
	DP.set = function ( image, repo, caption, alt ) {
		if ( this.tabs !== null ) {
			this.tabs.share.set( image );
			this.tabs.embed.set( image, repo, caption, alt );
			this.tabs.embed.set( image, repo, caption );
			this.showImageWarnings( image );
		} else {
			this.tabsSetValues = {
				share: [ image ],
				embed: [ image, repo, caption, alt ]
			};
		}
	};

	/**
	 * @inheritdoc
	 */
	DP.empty = function () {
		var tab;

		Dialog.prototype.empty.call( this );

		for ( tab in this.tabs ) {
			this.tabs[ tab ].empty();
		}
	};

	/**
	 * @event mmv-reuse-opened
	 * Fired when the dialog is opened.
	 */
	/**
	 * Opens a dialog with information about file reuse.
	 */
	DP.openDialog = function () {
		Dialog.prototype.openDialog.call( this );

		// move warnings after the tabs
		this.$warning.insertAfter( this.reuseTabs.$element );

		this.tabs[ this.selectedTab ].show();

		$( document ).trigger( 'mmv-reuse-opened' );
	};

	/**
	 * @event mmv-reuse-closed
	 * Fired when the dialog is closed.
	 */
	/**
	 * Closes the reuse dialog.
	 */
	DP.closeDialog = function () {
		Dialog.prototype.closeDialog.call( this );

		$( document ).trigger( 'mmv-reuse-closed' );
	};

	module.exports = ReuseDialog;
}() );