/*!
License: refer to LICENSE file
 */


// global search result list
function reload_leftbox(url, keyword) {
	// retrive data
	$.post(url, { keyword: keyword }, function(data) {
		var el = $('#leftbox');
		el.empty();
		el.append(data);

		$('.li-title').on('click', function() {
			// set the last title selected on cookie
			$.cookie(uport() + '.lasttitle', $(this).text(), { path: '/' });

			reload_books( $(this).attr('bookcodes'), $(this).attr('options') );
		});

		var elem = $('.li-title:contains("' + $.cookie(uport() + '.lasttitle') + '")');
		if (elem.length > 0) {
			// scroll to last selected title
			$('#leftbox').scrollTo( elem.eq(0) );

			// show books
			var bookcodes = elem.eq(0).attr('bookcodes');
			reload_books( bookcodes, elem.eq(0).attr('options') );
		}
		else {
			// last selected title don't exist, select first available title
			var el = $('.li-title');
			if (el.length > 0) {
				$('#leftbox').scrollTo( el.eq(0) );

				var bookcodes = el.eq(0).attr('bookcodes');
				reload_books( bookcodes, el.eq(0).attr('options') );
			}
			else {
				reload_books();
			}
		}
	});
}



// load books from the bookcodes
function reload_books( bookcodes, options ) {
	if (bookcodes === undefined) {
		$('#bookinfo').empty();
		$('#books').empty();
		return false;
	}

	var bookcode = bookcodes.split(',')[0];

	$.get('/listbooks', { bookcodes: bookcodes, options: options }, function(jData) {

		// show book title and author
		var el = $('#bookinfo');
		el.empty();
		el.attr('bookcodes', bookcodes); // remember requested bookcodes
		for (var bookcode in jData) {
			var book = jData[bookcode];

			var title = $('<div>');
			title.html(book.title);
			el.append(title);

			var author = $('<div>');
			author.html(book.author);
			author.on('click', function() {
				exe_show_author(book.author);
			});
			el.append(author);
			break;
		}

		// list books
		var el = $('#books');
		el.empty();
		for (var bookcode in jData) {
			var book = jData[bookcode];

			var li = $('<li>');
			li.addClass('book');

			var a = $('<a>');
			a.attr('href', '#book=' + bookcode + '&page=' + book.page || 1);
			a.on('click', { bookcode: bookcode }, function(event) {
				// console.log(event.data.bookcode);
				readBook(event.data.bookcode);
			});

			var img = $('<img>');
			img.attr('src', '/thumbnail/' + bookcode);
			img.attr('alt', 'Loading...');
			a.append(img);

			var span = $('<span>');
			span.html(book.sname);
			// set page progress
			var page  = book.page || 0;
			var pages = book.pages;
			var pc    = Math.round(page / pages * 100); // percentage read
			var pc2   = pc === 0 ? 0 : pc + 1; // if never read, then make it all 0
			span.css('background', 'linear-gradient(to right, rgba(51,204,102,1) ' + pc + '%,rgba(234,234,234,1) ' + pc2 + '%)');
			a.append(span);

			li.append(a);
			el.append(li);
		}
	});

}


function exe_show_author( author ) {

	var sb  = $('#searchbox');
	var bcs = $('#bcs');

	// save author and keyword
	bcs.attr('keyword', sb.val());
	bcs.attr('author',  author);

	// change search to author
	sb.val(author);

	$('#bc5').trigger('click');
}

function prepare_lists(url) {

	if (typeof url === 'undefined') url = get_menu_url();


	var sb  = $('#searchbox');
	var bcs = $('#bcs');
	var i   = get_menu_selection_number();

	// remember keyword
	var keyword;
	if (i === 5) {
		keyword = sb.val();
		bcs.attr('author', keyword);
		$.cookie(uport() + '.author', keyword, { path: '/' });
	}
	else {
		keyword = sb.val();
		bcs.attr('keyword', keyword);
		$.cookie(uport() + '.keyword', keyword, { path: '/' });
	}

	// reload leftbox
	reload_leftbox(url, keyword);
}

function get_menu_selection_number() {
	var id = $('#bcs > button.active').attr('id');

	var n;
	if (id) {
		n = parseInt( id.replace('bc','') );
	}

	return n || 1;
}

function get_menu_url() {
	return $('#bcs > button.active').attr('link');
}