/*
 * 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/>.
 */

( function ( mw, $, oo ) {
	// Shortcut for prototype later
	var DP;

	/**
	 * Represents the file reuse dialog and the link to open it.
	 * @class mw.mmv.ui.reuse.Dialog
	 * @extends mw.mmv.ui.Element
	 * @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 Dialog( $container, $openButton, config ) {
		mw.mmv.ui.Dialog.call( this, $container, $openButton, config );

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

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

		this.loadDependencies.push( 'mmv.ui.reuse.share' );
		this.loadDependencies.push( 'mmv.ui.reuse.embed' );

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

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

	oo.inheritClass( Dialog, mw.mmv.ui.Dialog );
	DP = Dialog.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.MenuItemWidget( type, {
				label: mw.message( 'multimediaviewer-' + type + '-tab' ).text()
			} );
		}

		this.reuseTabs = new oo.ui.MenuWidget( {
			classes: [ 'mw-mmv-reuse-tabs' ]
		} );

		// MenuWidget has a nasty tendency to hide itself, maybe we're not using it right?
		this.reuseTabs.hide = $.noop;
		this.reuseTabs.$element.show().appendTo( this.$dialog );

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

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

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

		this.selectedTab = this.getLastUsedTab();

		// In case nothing is saved in localStorage or it contains junk
		if ( ! this.tabs.hasOwnProperty( 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.tabsSetValues = undefined;
		}
	};

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

		mw.mmv.ui.Dialog.prototype.toggleDialog.call( this );
	};

	/**
	 * Handles tab selection.
	 */
	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 );
	};

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

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

		this.handleEvent( 'mmv-download-open', $.proxy( this.closeDialog, 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', $.proxy( dialog.handleTabSelection, dialog ) );

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

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

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

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

	/**
	 * @inheritdoc
	 */
	DP.empty = function () {
		mw.mmv.ui.Dialog.prototype.empty.call( this );

		for ( var 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 () {
		mw.mmv.ui.Dialog.prototype.openDialog.call( this );

		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 () {
		mw.mmv.ui.Dialog.prototype.closeDialog.call( this );

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

	mw.mmv.ui.reuse.Dialog = Dialog;
}( mediaWiki, jQuery, OO ) );