var is_loaded = false;
var backnumber_url_list;
var entries;
var search_keyword;
var result_content;
var timerId;

load_center_id();
function load_center_id() {
	var center = document.getElementById( 'center' );
	if ( center ) {
		ligting_search_keyword( center );
	} else {
		window.setTimeout( 'load_center_id()', 5000 );
	}
}

function ligting_search_keyword( center ) {
	var args = getHashArgs();
	var searched_keyword = args.search_word;
	if ( searched_keyword ) {
		searched_keyword = searched_keyword.replace( /([\/\\\.\*\+\?\|\(\)\[\]\{\}\$\^])/g, "\\$1" );
		searched_keyword = searched_keyword.replace( /( +|　+)/, ' ' );
		searched_keyword = searched_keyword.replace( /( |　)$/, '' );
		var keywords = searched_keyword.split(/ |　/);
		var h3 = center.getElementsByTagName( 'h3' );
		h3[0].innerHTML = highlight( h3[0].innerHTML, keywords );
		var div = center.getElementsByTagName( 'div' );
		for ( var i = 0; i < div.length; i++ ) {
			if ( div[i].className == 'entry-body-text' || div[i].className == 'comment-content' ) {	//	patched by furyu: add 'comment-content'
				div[i].innerHTML = highlight( div[i].innerHTML, keywords );
			}
		}
	}
}

function getHashArgs () {
	var args = new Object();
	var query = location.href.replace(/.*?#/,"");
   query = decodeURIComponent( query );
	var pairs = query.split("&");
	for ( var i = 0; i < pairs.length; i++ ) {
		var pos = pairs[i].indexOf('=');
		if ( pos == -1 ) continue;
		var argname = pairs[i].substring( 0, pos );
		var value = pairs[i].substring( pos + 1 );
		args[argname] = value;
	}
	return args;
}

function blogAjaxJsonSearch( archive_file_path, text ) {
	search_keyword = text;
	var div_tag = document.getElementsByTagName('div');
	for ( var i = 0; i < div_tag.length; i ++ ) {
		if ( div_tag[i].className == 'content' ) {
			result_content = div_tag[i];
		}
	}
	result_content.innerHTML = 'now searching.';
	added_period( result_content );
	if ( is_loaded ) {
		search();
	} else {
		new Ajax.Request( archive_file_path, {method: 'get', onComplete: function(request){ parse_archive_data( request ); } } );    
	}
}

function added_period( content ) {
	if ( !is_loaded ) {
		// ロード画像追加
		result_content.style.backgroundImage = 'url(http://www.cms-e.net/~zelth/blog/img/circle-ball-dark-antialiased.gif)';
		result_content.style.backgroundRepeat = 'no-repeat';
		result_content.style.backgroundPosition = '20px';
		timerId = setTimeout("added_period()", 50 );
	}
}

function parse_archive_data( request ) {
		var data_string = request.responseText;
		data_string = data_string.replace( new RegExp( '<.*?>', "i"), '' )
		entries = eval( data_string );
		search();
}

function show_all_backnumbers() {
	var text = '<ol type=1 start=1 style="text-align:left;">';
	for ( var i = 0; i < entries.length-1; i++ ) {	//	patched by furyu: entries.length => entries.length-1
		text += '<li><a href="' + entries[i].link + '">' +entries[i].title + '</a</li>';
	}
	text += '</ol>';
	document.getElementById('center').innerHTML = text;
}

function search() {
	var result_data = new Array();
	search_keyword=search_keyword.replace( /([\/\\\.\*\+\?\|\(\)\[\]\{\}\$\^])/g, "\\$1" );
	search_keyword = search_keyword.replace( /( +|　+)/, ' ' );
	search_keyword = search_keyword.replace( /( |　)$/, '' );
	var keywords = search_keyword.split(/ |　/);
	var key = new Array();
	for (var i= 0;i<keywords.length;i++) {
		key[ key.length ] = new RegExp( keywords[i], "i" );
	}
	for ( var i= 0; i<entries.length-1; i++ ) {	//	patched by furyu: entries.length => entries.length-1
		var is_match = true;
		for ( var j= 0; j<key.length; j++ ) {
			var res_body = key[j].exec( entries[i].body );
			var res_title = key[j].exec( entries[i].title );
			if ( !res_body && !res_title ) {
				is_match = false;
			}
		}
		if ( is_match ) {
			result_data[ result_data.length ] = entries[i];
		}
	}
	var result_html = '';
	if ( result_data.length == 0 ) {
		result_html =  '※一致するキーワードが見つかりません';
	} else {
		result_html = build_search_result_html( result_data, keywords );
	}
	var div = window.document.getElementsByTagName('div');
//	var content;
//	var original_content_html = '';
//	for ( var i = 0; i < div.length; i ++ ) {
//		if ( div[i].className == 'content' ) {
//			content = div[i];
//			original_content_html = content.innerHTML;
//		}
//	}
	is_loaded = true;
	clearTimeout(timerId);
	result_content.innerHTML = result_html;
	// 終了時の画像off
	result_content.style.backgroundImage = '';
	result_content.style.backgroundRepeat = 'no-repeat';
	result_content.style.backgroundPosition = '';
}

function build_search_result_html( result_data, keywords ) {
	var html = '<div id="search_notice"  style="text-align:left; font-size: x-small;">※スペースでAND検索が出来ます。<br />※この状態からの２度目の検索は非常に高速です。</div><div class="entry-top"></div><div class="entry"><h3>検索結果（' + result_data.length + '件ヒット ）</h3><div class="entry-body-top"></div><div class="entry-body"><div class="entry-body-text"><ol type=1 start=1 style="text-align:left;">';
	for ( var i= 0; i<result_data.length; i++ ) {
		html += '<li><a href="' + result_data[i].link + '#search_word=' + search_keyword + '" target="_blank">' + highlight( result_data[i].title, keywords ) + '</a><br />' + highlight( trunc( result_data[i].body, keywords[0] ), keywords ) + '</li>';
	}
	html += '</ol></div></div><div class="entry-body-bottom"></div><p class="posted" style="text-align:right; font-size: smaller;"><span class="post-footers"></span><span class="separator"></span><span class="bo_so_copyright">powered by <a href="http://java.cocolog-nifty.com/blog/2005/12/typepadmtajaxja_c70d.html">blog_ajax_json_search.js</a></span></p></div><div class="entry-bottom"></div><div class="date-footer"></div>';
	return html;
}

function trunc( text, keyword ) {
	var key = new RegExp( keyword, "i" );
	var res = key.exec( text );

	if ( res ) {
		var index  = res.index;
		var length = res[0].length;
		var start;
		var end;

		start = index - 20;
		end = 55;
		text = text.substring( start, index ) + text.substr( index, length ) + text.substr( index + length, end ) +'...';
	} else {
		text = text.substring( start, 50 );
	}
	return text;
}

function highlight( text, keywords ) {
	var keyword = '';
	for ( var i= 0; i<keywords.length; i++ ) {
		if ( i == keywords.length - 1 ) {
			keyword += keywords[i];
		} else {
			keyword += keywords[i] + '|'; 
		}
	}
// patched by furyu  --- from --- ( referred to 'cocolog_ajax_search.js' )
/* // original //
	return text.replace( new RegExp( '(' + keyword + ')', "ig"), '<span style="background-color: #3BFD07;">' + "$1" + '</span>' );
*/
	var	replaced_text = text.replace( new RegExp( '(' + keyword + ')', "ig"), '<span style="background-color: #3BFD07;">' + "$1" + '</span>' );
	while( replaced_text.match( new RegExp( '(<[^>]+)<span style="background-color: #3BFD07;">(' + keyword + ')</span>(.*?>)', "ig") ) ) {
		replaced_text = replaced_text.replace( new RegExp( '(<[^>]+)<span style="background-color: #3BFD07;">(' + keyword + ')</span>(.*?>)', "ig"), "$1$2$3" );
	}
	return replaced_text;
// patched by furyu  ---  to  ---

}