/*
 * post-hover.js
 * https://github.com/savetheinternet/Tinyboard/blob/master/js/post-hover.js
 *
 * Released under the MIT license
 * Copyright (c) 2012 Michael Save <savetheinternet@tinyboard.org>
 * Copyright (c) 2013-2014 Marcin Łabanowski <marcin@6irc.net>
 * Copyright (c) 2013 Macil Tech <maciltech@gmail.com>
 *
 * Usage:
 *   $config['additional_javascript'][] = 'js/jquery.min.js';
 *   $config['additional_javascript'][] = 'js/post-hover.js';
 *
 */

onready(function(){
	var dont_fetch_again = [];
	init_hover = function() {
		var link = $(this);
		
		var id;
		var matches;

                if (link.is('[data-thread]')) {
                        id = link.attr('data-thread');
                }
		else if(matches = link.text().match(/^>>(?:>\/([^\/]+)\/)?(\d+)$/)) {
			id = matches[2];
		}
		else {
			return;
		}
		
		var board = $(this);
		while (board.data('board') === undefined) {
			board = board.parent();
		}
		var threadid;
		if (link.is('[data-thread]')) threadid = 0;
		else threadid = board.attr('id').replace("thread_", "");

		board = board.data('board');

		var parentboard = board;
		
		if (link.is('[data-thread]')) parentboard = $('form[name="post"] input[name="board"]').val();
		else if (matches[1] !== undefined) board = matches[1];

		var post = false;
		var hovering = false;
		link.hover(function(e) {
			hovering = true;
			
			var start_hover = function(link) {					
				if(post.is(':visible') &&
						post.offset().top >= $(window).scrollTop() &&
						post.offset().top + post.height() <= $(window).scrollTop() + $(window).height()) {
					// post is in view
					post.addClass('highlighted');
				} else {
					var newPost = post.clone();
					newPost.find('>.reply, >br').remove();
					newPost.find('a.post_anchor').remove();

					newPost
						.attr('id', 'post-hover-' + id)
						.attr('data-board', board)
						.addClass('post-hover')
						.css('border-style', 'solid')
						.css('box-shadow', '1px 1px 1px #999')
						.css('display', 'block')
						.css('position', 'absolute')
						.css('font-style', 'normal')
						.css('z-index', '100')
						.css('left', '0')
						.addClass('reply').addClass('post')
						.appendTo(link.closest('div.post'))
						
					// shrink expanded images
					newPost.find('div.file a[data-expanded="true"]').each(function() {
						var thumb = $(this).data('src');
						$(this).find('img.post-image').attr('src', thumb);
					});
					
					// Highlight references to the current post
					if (link.hasClass('mentioned-'+id)) {
						var postLinks = newPost.find('div.body a:not([rel="nofollow"])');
						if (postLinks.length > 1) {
							var originalPost = link.closest('div.post').attr('id').replace("reply_", "").replace("inline_", "");
							postLinks.each(function() {
								if ($(this).text() == ">>"+originalPost) {
									$(this).addClass('dashed-underline');
								}
							});
						}
					}
					
					var previewWidth = newPost.outerWidth(true);
					var widthDiff = previewWidth - newPost.width();
					var linkLeft = link.offset().left;
					var left, top;
					
					if (linkLeft < $(document).width() * 0.7) {
						left = linkLeft + link.width();
						if (left + previewWidth > $(window).width()) {
							newPost.css('width', $(window).width() - left - widthDiff);
						}
					} else {
						if (previewWidth > linkLeft) {
							newPost.css('width', linkLeft - widthDiff);
							previewWidth = linkLeft;
						}
						left = linkLeft - previewWidth;
					}
					newPost.css('left', left);
					
					top = link.offset().top - 10;
					
					var scrollTop = $(window).scrollTop();
					if (link.is("[data-thread]")) {
						scrollTop = 0;
						top -= $(window).scrollTop();	
					}
					
					if(top < scrollTop + 15) {
						top = scrollTop;
					} else if(top > scrollTop + $(window).height() - newPost.height() - 15) {
						top = scrollTop + $(window).height() - newPost.height() - 15;
					}
					
					if (newPost.height() > $(window).height()) {
						top = scrollTop;
					}
					
					newPost.css('top', top);
				}
			};
			
			post = $('[data-board="' + board + '"] div.post#reply_' + id + ', [data-board="' + board + '"]div#thread_' + id);
			if(post.length > 0) {
				start_hover($(this));
			} else {
				var url = link.attr('href').replace(/#.*$/, '');
				
				if($.inArray(url, dont_fetch_again) != -1) {
					return;
				}
				dont_fetch_again.push(url);
				
				$.ajax({
					url: url,
					context: document.body,
					success: function(data) {
						var mythreadid = $(data).find('div[id^="thread_"]').attr('id').replace("thread_", "");

						if (mythreadid == threadid && parentboard == board) {
							$(data).find('div.post.reply').each(function() {
								if($('[data-board="' + board + '"] #' + $(this).attr('id')).length == 0) {
									$('[data-board="' + board + '"]#thread_' + threadid + " .post.reply:first").before($(this).hide().addClass('hidden'));
								}
							});
						}
						else if ($('[data-board="' + board + '"]#thread_'+mythreadid).length > 0) {
							$(data).find('div.post.reply').each(function() {
								if($('[data-board="' + board + '"] #' + $(this).attr('id')).length == 0) {
									$('[data-board="' + board + '"]#thread_' + mythreadid + " .post.reply:first").before($(this).hide().addClass('hidden'));
								}
							});
						}
						else {
							$(data).find('div[id^="thread_"]').hide().attr('data-cached', 'yes').prependTo('form[name="postcontrols"]');
						}

						post = $('[data-board="' + board + '"] div.post#reply_' + id + ', [data-board="' + board + '"]div#thread_' + id);

						if(hovering && post.length > 0) {
							start_hover(link);
						}
					}
				});
			}
		}, function() {
			hovering = false;
			if(!post)
				return;
			
			post.removeClass('highlighted');
			if(post.hasClass('hidden') || post.data('cached') == 'yes')
				post.css('display', 'none');
			$('.post-hover').remove();
		});
	};
	
	$('div.body a:not([rel="nofollow"])').each(init_hover);
	
	// allow to work with auto-reload.js, etc.
	$(document).on('new_post', function(e, post) {
		$(post).find('div.body a:not([rel="nofollow"])').each(init_hover);
	});
});