package nabble.view.lib;

import fschmidt.util.java.HtmlUtils;
import fschmidt.util.java.MD5Util;
import nabble.model.Init;
import nabble.model.ModelHome;
import nabble.model.Node;
import nabble.model.Person;
import nabble.model.Site;
import nabble.model.User;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;


public final class Shared {
    private static final Logger logger = LoggerFactory.getLogger(Shared.class);

	private Shared() {}  // never

	public static volatile int javascriptVersion = 102;

	public static final int cssVersion = 29;

	public static String getCssPath() {
		return "/nabble.css?v="+cssVersion;
	}

	public static String getJavascriptPath(HttpServletRequest request) {
		return Jtp.getSite(request) == null? "/Javascript.jtp" : "/template/NamlServlet.jtp?macro=javascript_library";
	}

	public static String getTabsPath() {
		return "/util/nabbletabs.js";
	}

	public static String getJQueryPath() {
		return "/util/jquery-1.7.2.pack.js";
	}

	public static String getDropdownJsPath() {
		return "/util/nabbledropdown-2.4.1.js";
	}

	public static void head(HttpServletRequest request,HttpServletResponse response)
		throws IOException
	{
		head(request, response, true);
	}

	public static void head(HttpServletRequest request,HttpServletResponse response, boolean useSiteStyle)
		throws IOException
	{
		if( request.getAttribute("head") != null )
			return;
		request.setAttribute("head","x");
		PrintWriter out = response.getWriter();
		Site site = Jtp.getSite(request);
		boolean isApp = site != null && site.getRootNode().getKind() == Node.Kind.APP;
		
		out.print( "\r\n<link rel=\"stylesheet\" href=\"" );
		out.print( (Shared.getCssPath()) );
		out.print( "\" type=\"text/css\" />\r\n" );
 if (isApp && useSiteStyle) { 
		out.print( "\r\n<link rel=\"stylesheet\" href=\"/template/NamlServlet.jtp?macro=site_style\" type=\"text/css\" />\r\n" );
 } 
		out.print( "\r\n" );
 loadJavascript(request, out); 
		out.print( "\r\n" );
 if (isApp) { 
		out.print( "\r\n<script type=\"text/javascript\">\r\n	Nabble.setFontSize();\r\n</script>\r\n" );
 } 
		out.print( "\r\n" );

		loadAnalytics(request,response);
	}

	public static void loadJavascript(HttpServletRequest request, PrintWriter out) {
		
		out.print( "\r\n<script src=\"" );
		out.print( (getJQueryPath()) );
		out.print( "\" type=\"text/javascript\"></script>\r\n<script src=\"" );
		out.print( (getDropdownJsPath()) );
		out.print( "\" type=\"text/javascript\"></script>\r\n<script src=\"" );
		out.print( (getJavascriptPath(request)) );
		out.print( "\" type=\"text/javascript\"></script>\r\n" );

	}

	private static void checkHead(HttpServletRequest request) {
		if( request.getAttribute("head") == null )
			throw new RuntimeException("Shared.head not called");
	}

	public static void minHeader(HttpServletRequest request,HttpServletResponse response)
		throws IOException, ServletException
	{
		minHeader(request,response,null);
	}

	public static void minHeader(HttpServletRequest request,HttpServletResponse response,Node node)
		throws IOException, ServletException
	{
		minHeader(request, response, node, null);
	}

	public static void minHeaderGlobal(HttpServletRequest request,HttpServletResponse response)
		throws IOException, ServletException
	{
		Site site = Jtp.getSite(request);
		if (site == null) {
			String homepageLink = "<a id=\"homelink\" href=\"" + Jtp.homePage() + "\">Nabble</a>";
			minHeader(request, response, null, new String[] { homepageLink });
			PrintWriter out = response.getWriter();
			
		out.print( "\r\n<script type=\"text/javascript\">\r\n	if (Nabble.getParent().nabbleinfo && Nabble.getParent().nabbleinfo.what) {\r\n		var home = Nabble.get('homelink');\r\n		home.setAttribute('href', '/');\r\n		home.innerHTML='Back to ' + Nabble.getParent().nabbleinfo.what;\r\n	}\r\n</script>\r\n" );

		} else {
			Node node = site.getRootNode();
			String homepageLink = "<a href=\"" + Jtp.url(node) + "\">" + node.getSubjectHtml() + "</a>";
			minHeader(request, response, null, new String[] { homepageLink });
		}
	}

	public static void minHeader(HttpServletRequest request, HttpServletResponse response, Node node, String[] breadcrumbLinks)
		throws IOException, ServletException
	{
		minHeader(request, response, node, breadcrumbLinks, true);
	}

	public static void minHeader(HttpServletRequest request, HttpServletResponse response, Node node, String[] breadcrumbLinks, boolean embeddedRedirect)
		throws IOException, ServletException
	{
		PrintWriter out = response.getWriter();
		checkHead(request);
		Node app = node==null ? null : node.getApp();
		if (embeddedRedirect)
			embeddedRedirect(request, out, app);
		
		out.print( "\r\n<div id=\"notice\" class=\"notice rounded-bottom\"></div>\r\n<div class=\"nabble\" id=\"nabble\">\r\n	<div class=\"top-bar\">\r\n		<div class=\"breadcrumbs\" style=\"float:left;\">\r\n			" );

					if (app != null)
						breadcrumb(request,out,app);
					else if (breadcrumbLinks != null)
						breadcrumb(out,breadcrumbLinks);
					
		out.print( "\r\n</div>\r\n<div style=\"text-align:right;\">\r\n<span style=\"white-space:nowrap;\" id=\"nabble-user-header\"></span>\r\n<script type=\"text/javascript\">Nabble.userHeader();</script>\r\n</div>\r\n</div>\r\n<div style=\"clear:both;\"></div>\r\n" );

			if (request.getAttribute("search") == null) {
				
		out.print( "\r\n<script type=\"text/javascript\">\r\n	Nabble.deleteCookie(\"query\");\r\n	Nabble.deleteCookie(\"searchuser\");\r\n	Nabble.deleteCookie(\"searchterms\");\r\n</script>\r\n" );

			}
	}

	public static void noHeader(HttpServletRequest request,HttpServletResponse response)
		throws IOException, ServletException
	{
		PrintWriter out = response.getWriter();
		
		out.print( "\r\n<div class=\"nabble\" id=\"nabble\">\r\n" );

	}

	public static void editHeader(String firstText, String secondText, PrintWriter out) {
		
		out.print( "\r\n<div class=\"second-font shaded-bg-color\" style=\"font-size: 120%;padding: .4em;font-weight:bold\">\r\n	" );
		out.print( (firstText) );
		out.print( " <span class=\"weak-color\">" );
		out.print( (secondText == null? "" : "&ndash; " + secondText) );
		out.print( "</span>\r\n</div>\r\n" );

	}

	public static void helpHeader(HttpServletRequest request,HttpServletResponse response)
		throws IOException, ServletException
	{
		Site site = Jtp.getSite(request);
		String homepageLink = "<a href=\"/\">" + (site == null? "Nabble":site.getRootNode().getSubjectHtml()) + "</a>";
		String helpLink = "<a href=\"/help/Index.jtp\">Help</a>";
		minHeader(request, response, null, new String[] { homepageLink, helpLink });
	}

	public static void footer(HttpServletRequest request,HttpServletResponse response)
		throws ServletException, IOException
	{
		PrintWriter out = response.getWriter();
		Site site = Jtp.getSite(request);
		if( site == null ) {
			
		out.print( "\r\n<table class=\"footer-table shaded-bg-color\">\r\n	<tr>\r\n		<td class=\"footer-left\">\r\n			<a href=\"" );
		out.print( (Jtp.homePage()) );
		out.print( "\" target=\"_top\">Free Forum</a> by Nabble\r\n		</td>\r\n	</tr>\r\n</table>\r\n" );

		} else {
			
		out.print( "\r\n<table class=\"footer-table shaded-bg-color\">\r\n	<tr>\r\n		<td class=\"footer-left\">\r\n			<a href=\"" );
		out.print( (Jtp.homePage()) );
		out.print( "\" target=\"_top\">Free Forum</a>\r\n			by Nabble\r\n		</td>\r\n		<td class=\"footer-right\">\r\n			<a href=\"" );
		out.print( (Jtp.helpIndexUrl(request,response)) );
		out.print( "\">Help</a>\r\n		</td>\r\n	</tr>\r\n</table>\r\n" );

		}
		
		out.print( "\r\n</div>\r\n" );

	}

	public static void noFooter(HttpServletRequest request,HttpServletResponse response)
		throws ServletException, IOException
	{
		PrintWriter out = response.getWriter();
		
		out.print( "\r\n</div>\r\n" );

	}

	public static void breadcrumb(HttpServletRequest request,PrintWriter out,Node node)
		throws ServletException, IOException
	{
		List<String> links = new ArrayList<String>();
		node = node.getApp();
		while (node != null) {
			links.add(0, "<a href=\"" + Jtp.path(node) + "\">" + node.getSubjectHtml() + "</a>");
			node = node.getParent();
		}
		String[] array = new String[links.size()];
		links.toArray(array);
		breadcrumb(out, array);
	}

	private static void breadcrumb(PrintWriter out, String[] links)
		throws ServletException, IOException
	{
		
		out.print( "<span class=\"weak-color\" style=\"white-space:nowrap\">" );

		for (String s : links) {
			
		out.print( (s) );

			boolean isLastString = s.equals(links[links.length-1]);
			if (!isLastString) {
				
		out.print( "&nbsp;&rsaquo;&nbsp;" );

			}
		}
		
		out.print( "</span>" );

	}

	public static void javascriptRedirect(HttpServletRequest request,HttpServletResponse response,String url)
		throws IOException, ServletException
	{
		javascriptRedirect(request,response,url,null);
	}

	public static void javascriptRedirect(HttpServletRequest request,HttpServletResponse response,String url,String script)
		throws IOException, ServletException
	{
		javascriptRedirect(request, response, url, script, false);
	}

	public static void javascriptRedirect(HttpServletRequest request,HttpServletResponse response,String url,String script, boolean leaveEmbedding)
		throws IOException, ServletException
	{
		PrintWriter out = response.getWriter();
		
		out.print( "\r\n<html>\r\n<head>\r\n	<script src=\"" );
		out.print( (getJQueryPath()) );
		out.print( "\" type=\"text/javascript\"></script>\r\n	<script src=\"" );
		out.print( (getJavascriptPath(request)) );
		out.print( "\" type=\"text/javascript\"></script>\r\n	" );
 loadAnalytics(request,response); 
		out.print( "\r\n	<script type=\"text/javascript\">\r\n		" );
		out.print( (Jtp.hideNull(script)) );
		out.print( "\r\n		var url = \"" );
		out.print( (HtmlUtils.javascriptStringEncode(url)) );
		out.print( "\";\r\n\r\n		" );
		out.print( (leaveEmbedding? "top." : "") );
		out.print( "location.replace(url);\r\n	</script>\r\n</head>\r\n</html>\r\n" );

	}

	/* Rebuilds the embedding iframe and reload the contents.*/
	public static void restartEmbedding(Node node, HttpServletRequest request, HttpServletResponse response)
		throws IOException, ServletException
	{
		PrintWriter out = response.getWriter();
		
		out.print( "\r\n<html>\r\n	<head>\r\n		<script src=\"" );
		out.print( (getJQueryPath()) );
		out.print( "\" type=\"text/javascript\"></script>\r\n		<script src=\"" );
		out.print( (getJavascriptPath(request)) );
		out.print( "\" type=\"text/javascript\"></script>\r\n		<script type=\"text/javascript\">\r\n			Nabble.restartEmbedding(" );
		out.print( (node.getId()) );
		out.print( ",'" );
		out.print( (node.getSite().getBaseUrl()) );
		out.print( "');\r\n		</script>\r\n	</head>\r\n</html>\r\n" );

	}

	public static void errorMessage(HttpServletRequest request,HttpServletResponse response,String errorMsg,String prompt)
		throws ServletException, IOException
	{
		if( errorMsg==null )
			return;
		PrintWriter out = response.getWriter();
		errorMsg = HtmlUtils.htmlEncode(errorMsg);
		int posLinkOpen = errorMsg.indexOf("[link]");
		if (posLinkOpen >= 0) {
			int posLinkClose = errorMsg.indexOf("[/link]", posLinkOpen);
			String url = errorMsg.substring(posLinkOpen+6, posLinkClose);
			errorMsg = errorMsg.substring(0, posLinkOpen) + "<a href=\"" + url + "\">" + url + "</a>" + errorMsg.substring(posLinkClose+7);
		}
		
		out.print( "\r\n<table class=\"error-message\" style=\"width:100%\">\r\n	<tr>\r\n		<td style=\"padding: .4em; width: 40px;\">\r\n			<img src=\"/images/icon_alert.png\" class=\"image32\"/>\r\n		</td>\r\n		<td style=\"padding: .4em;\">\r\n			<strong>" );
		out.print( (errorMsg) );
		out.print( "</strong>\r\n			" );
		out.print( (prompt == null? "" : "<div style=\"padding-top:.3em\">" + prompt + "</div>") );
		out.print( "\r\n		</td>\r\n	</tr>\r\n</table>\r\n" );

	}

	public static void title(HttpServletRequest request,HttpServletResponse response,String s)
		throws ServletException, IOException
	{
		PrintWriter out = response.getWriter();
		Site site = Jtp.getSite(request);
		
		out.print( "\r\n<meta http-equiv=\"Content-Type\" content=\"text/html;charset=utf-8\" />\r\n<title>" );
		out.print( (site == null?"Nabble":site.getRootNode().getSubjectHtml()) );
		out.print( " - " );
		out.print( (s) );
		out.print( "</title>\r\n" );

		head(request,response);
	}

	private static void loadAnalytics(HttpServletRequest request,HttpServletResponse response)
		throws IOException
	{
		PrintWriter out = response.getWriter();
		HtmlViewUtils.googleAnalytics(out);
	}

	public static void analytics(HttpServletRequest request,HttpServletResponse response)
		throws IOException
	{
		PrintWriter out = response.getWriter();
		
		out.print( "\r\n<script type=\"text/javascript\">\r\n	if (Nabble.analytics) Nabble.analytics();\r\n</script>\r\n" );

	}

	public static void postInThreadLink(HttpServletRequest request, PrintWriter out, Node post)
		throws ServletException, IOException
	{
		String topicSubject = Jtp.breakUp(post.getTopic().getSubjectHtml());
		String postSubject = Jtp.breakUp(post.getSubjectHtml());
		if( postSubject.endsWith(topicSubject) ) {
			
		out.print( "<a href=\"" );
		out.print( (Jtp.path(post)) );
		out.print( "\">" );
		out.print( (postSubject) );
		out.print( "</a>" );

		} else {
			
		out.print( (topicSubject) );
		out.print( "</a> &nbsp; (<a href=\"" );
		out.print( (Jtp.path(post)) );
		out.print( "\">" );
		out.print( (postSubject) );
		out.print( "</a>)" );

		}
	}

	public static void profileHeading(HttpServletRequest request,PrintWriter out,User user,String heading)
	{
		
		out.print( "\r\n<h1>" );
		out.print( (heading) );
		out.print( "</h1>\r\n" );

	}

	public static void returnToJs(HttpServletRequest request, HttpServletResponse response)
		throws IOException, ServletException
	{
		returnToJs(null, request, response);
	}

	public static void returnToJs(Node node, HttpServletRequest request, HttpServletResponse response)
		throws IOException, ServletException
	{
		PrintWriter out = response.getWriter();
		if (node == null) {
			Site site = Jtp.getSite(request);
			if (site != null && site.getRootNode().getKind() == Node.Kind.APP)
				node = site.getRootNode();
		}
		
		out.print( "\r\n<div id=\"return-link\" style=\"margin-top:1em\">\r\n	" );
 if (node != null) { 
		out.print( "\r\n	&laquo;\r\n	<a href=\"" );
		out.print( (Jtp.path(node)) );
		out.print( "\">Return to " );
		out.print( (node.getSubject()) );
		out.print( "</a>\r\n	" );
 } 
		out.print( "\r\n</div>\r\n" );

	}

	public static void framedCss(PrintWriter out)
	{
		
		out.print( "\r\n<style>\r\nbody {\r\n	margin: .8em;\r\n}\r\n</style>\r\n" );

	}

	public static void embeddedRedirect(HttpServletRequest request, PrintWriter out, Node forum)
		throws IOException
	{
		// The embedding URL is stored in the node.embedding_url field.
		String embeddingUrl = null;
		for(
			Node node = forum;
			embeddingUrl == null && node != null;
			node = node.getParent()
		) {
			embeddingUrl = node.getEmbeddingUrl();
		}

		if (embeddingUrl == null)
			return;
		
		out.print( "\r\n<script type=\"text/javascript\">\r\n	if (!Nabble.isEmbedded) {\r\n		var url = top.location.href;\r\n		var cidPos = url.indexOf(';cid=');\r\n		if (cidPos > 0) {\r\n			url = url.substring(0, cidPos);\r\n		}\r\n\r\n		var posHtml = url.lastIndexOf('.html');\r\n		var hash;\r\n		" );

				/*
					If the URL is mapped, we extract the last
					part, which gives information about the item.
					For example:
					https://www.nabble.com/text-p100.html
					We extract "p100", because we know how to
					rebuild this URL with this information.

					See JsEmbed.jtp for more details on how to
					rebuild the URL.
				*/
				
		out.print( "\r\nif (url.indexOf('?') == -1 && posHtml > 0) {\r\n	var posStart = url.lastIndexOf('-');\r\n	hash = (posStart > 0)? url.substring(posStart, posHtml):'';\r\n} else {\r\n	" );

					/*
						If the URL is NOT mapped, we have to extract
						the information after the domain.
						For example:
						  - http://localhost/forum/NewTopic.jtp?forum=2
						We extract "forum/NewTopic.jtp?forum=2".
					*/
					
		out.print( "\r\nhash = url.replace('http://', '');\r\nhash = hash.substring(hash.indexOf('/')+1);\r\nhash = '+' + hash;\r\n}\r\n" );

				/*
					In order to restore the current hash, I append it to the
					same string after a pipe separator. This will be restored
					in the Nabble.getCurrentUrl() function in JsEmbed.jtp.
				*/
				
		out.print( "\r\nif (top.location.hash) {\r\n	hash += '|' + top.location.hash.substring(1);\r\n}\r\nif (Nabble.analytics) Nabble.analytics();\r\ntop.location.replace('" );
		out.print( (embeddingUrl) );
		out.print( "' + (hash.length==1?'':'#nabble' + encodeURIComponent(hash)));\r\n}\r\n</script>\r\n" );

	}

	public static String getAvatarImageURL(Person visitor, boolean smallImage) {
		String imageName = smallImage? ModelHome.AVATAR_SMALL : ModelHome.AVATAR_BIG;
		String defaultImage = "/images/" + imageName;
		if( visitor instanceof User ) {
			User user = (User)visitor;
			if( user.hasAvatar() )
				return "/file/a" + user.getId() + '/' + imageName;
		}
		return defaultImage;
	}

	public static String getDefaultAvatarImageURL(boolean smallImage) {
		String imageName = smallImage? ModelHome.AVATAR_SMALL : ModelHome.AVATAR_BIG;
		return "/images/" + imageName;
	}

	public static String simpleBannedMessage(Node app) {
		StringBuilder builder = new StringBuilder();
		builder
			.append("Sorry, but the administrators of this ")
			.append(Jtp.viewName(app).toLowerCase())
			.append(" have banned you.\n ");
		return builder.toString();
	}

	public static String bannedMessage(Node app, boolean isPost) {
		StringBuilder builder = new StringBuilder();
		builder.append(simpleBannedMessage(app));
		if (isPost)
			builder.append("You can't post a message here, but you can post in other places.");
		else
			builder.append("You can't create a forum here, but you can create in other places.");
		return builder.toString();
	}


	public static void simplePage(String pageTitle, Node node, String messageTitle, String message, HttpServletRequest request, HttpServletResponse response)
		throws IOException, ServletException
	{
		PrintWriter out = response.getWriter();
		
		out.print( "\r\n<html>\r\n	<head>\r\n		<META NAME=\"robots\" CONTENT=\"noindex,nofollow\">\r\n		" );
 title(request, response, pageTitle); 
		out.print( "\r\n		<style type=\"text/css\">\r\n			div.main-title {\r\n				font-size:120%;\r\n				font-weight:bold;\r\n				margin:1em 0;\r\n				padding: .2em;\r\n			}\r\n		</style>\r\n		<script type=\"text/javascript\">\r\n			" );
/* here I set the next url for the login UI */
		out.print( "\r\n			var loginNextUrl = '" );
		out.print( (node==null?"/":Jtp.url(node)) );
		out.print( "';\r\n		</script>\r\n	</head>\r\n	<body>\r\n		" );

					if (node == null)
						minHeaderGlobal(request, response);
					else
						minHeader(request, response, node);
				
		out.print( "\r\n<div class=\"shaded-bg-color rounded second-font main-title\">\r\n	" );
		out.print( (messageTitle) );
		out.print( "\r\n</div>\r\n" );
		out.print( (message) );
		out.print( "\r\n" );
 if (node != null) { 
		out.print( "\r\n<br><br>&laquo; <a href=\"" );
		out.print( (Jtp.url(node)) );
		out.print( "\">Back to " );
		out.print( (node.getSubjectHtml()) );
		out.print( "</a>\r\n" );
 } else { 
		out.print( "\r\n<br>\r\n" );
 } 
		out.print( "\r\n<br/><br/>\r\n" );
 footer(request,response); 
		out.print( "\r\n" );
 analytics(request,response); 
		out.print( "\r\n</body>\r\n</html>\r\n" );

	}

	public static void canonical(HttpServletRequest request, HttpServletResponse response)
		throws IOException, ServletException
	{
		String canonical = Jtp.getCanonicalUrl(request);
		if (canonical != null) {
			PrintWriter out = response.getWriter();
			
		out.print( "\r\n<link rel=\"canonical\" href=\"" );
		out.print( (canonical) );
		out.print( "\" />\r\n" );

		}
	}

	/** (To be used by scripts)
	 * http://tablesorter.com/docs/
	 */
	public static void tableSorter(PrintWriter out, String sortList)
		throws IOException, ServletException
	{
		
		out.print( "\r\n<link rel=\"stylesheet\" href=\"/util/tablesorter/style.css\" type=\"text/css\" />\r\n<script src=\"/util/tablesorter/jquery.tablesorter.min.js\" type=\"text/javascript\"></script>\r\n<script type=\"text/javascript\">\r\n	$(document).ready(function() {\r\n		$(\"table.tablesorter\").tablesorter(" );
		out.print( (sortList) );
		out.print( ");\r\n	});\r\n</script>\r\n" );

	}

	/** (To be used by scripts) */
	public static void countTableRows(PrintWriter out)
		throws IOException, ServletException
	{
		
		out.print( "\r\n<div id=\"rows\"></div>\r\n<script type=\"text/javascript\">\r\n	$(document).ready(function() {\r\n		var count = $('tbody tr').size();\r\n		$(\"#rows\").html(count + \" rows\");\r\n	});\r\n</script>\r\n" );

	}
}