package nabble.view.web.embed;

import fschmidt.util.servlet.JtpContext;
import nabble.model.Node;
import nabble.model.Site;
import nabble.view.lib.Jtp;
import nabble.view.lib.UrlMappable;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;


public final class NabbleEmbed extends HttpServlet implements UrlMappable {

	private static final Pattern URL_PATTERN = Pattern.compile("/embed/(f|p)?(\\d+)?$");

	public String path(String type, String nodeId) {
		return "/embed/" + type + nodeId;
	}

	public Map<String, String[]> getParameterMapFromUrl(HttpServletRequest request,String mappedUrl) {
		Matcher m = URL_PATTERN.matcher(mappedUrl);
		if( !m.find() )
			throw new RuntimeException();
		Map<String,String[]> params = new HashMap<String,String[]>();
		String type = m.group(1);
		String nodeId = m.group(2);
		params.put("type",new String[]{type});
		params.put("node",new String[]{nodeId});
		return params;
	}

	public Pattern getUrlPattern() {
		return URL_PATTERN;
	}

	protected void service(HttpServletRequest request, HttpServletResponse response)
		throws ServletException, IOException
	{
		JtpContext jtpContext = (JtpContext)getServletContext().getAttribute(JtpContext.attrName);
		jtpContext.setEtag(request,response);
		response.setHeader("Content-Type","application/x-javascript");
		PrintWriter out = response.getWriter();

		long nodeId = Long.valueOf(request.getParameter("node"));
		Site site = Jtp.getSite(request);
		if (site == null) {
			response.sendError(HttpServletResponse.SC_NOT_FOUND, "Node not found");
				return;
			}
		Node node = site.getNode(nodeId);
		if (node == null) {
			response.sendError(HttpServletResponse.SC_NOT_FOUND, "Node not found");
			return;
		}
		jsLoadNode(site.getId(), nodeId, request, out);
	}

	static void invalidApp(PrintWriter out) {
		
		out.print( "\r\n	document.write(\"<div style='margin:.5em 0'>\");\r\n	document.write(\"<span style='color:#000;background:#FFF;padding:.5em'>\");\r\n	document.write(\"<b>This forum doesn't exist.</b><br>\");\r\n	" );
 if (Jtp.supportUrl() != null) { 
		out.print( "\r\n	document.write(\"Please contact <a href='" );
		out.print( (Jtp.supportUrl()) );
		out.print( "'>Nabble Support</a> if you need help.\");\r\n	" );
 } 
		out.print( "\r\n	document.write(\"</span>\");\r\n	document.write(\"</div>\");\r\n" );

	}

	static void jsLoadNode(long siteId, long nodeId, HttpServletRequest request, PrintWriter out) {
		String base = Jtp.getBaseUrl(request);
		
		out.print( "\r\n        var link=document.getElementById(\"nabblelink\");\r\nif (link != null) {\r\n	link.style.display=\"none\";\r\n	document.write(\"<div id='nabbleforum' style='width:100%'><div style='height:700px'><img src='" );
		out.print( (base) );
		out.print( "/images/loading.png' width='94' height='33' alt='Loading...'></div></div>\");\r\n	var e = document.createElement(\"script\");\r\n	e.src = '" );
		out.print( (base) );
		out.print( "/embed/JsEmbed.jtp?site=" );
		out.print( (siteId) );
		out.print( "&node=" );
		out.print( (nodeId) );
		out.print( "&url=' + encodeURIComponent(location.href);\r\n            e.type=\"text/javascript\";\r\n	document.getElementsByTagName(\"head\")[0].appendChild(e);\r\n}\r\n" );

	}
}