package fi.iki.elonen.debug;

/*
 * #%L
 * NanoHttpd-Samples
 * %%
 * Copyright (C) 2012 - 2015 nanohttpd
 * %%
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 
 * 3. Neither the name of the nanohttpd nor the names of its contributors
 *    may be used to endorse or promote products derived from this software without
 *    specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * #L%
 */

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import fi.iki.elonen.NanoHTTPD;
import fi.iki.elonen.util.ServerRunner;

public class DebugServer extends NanoHTTPD {

    public static void main(String[] args) {
        ServerRunner.run(DebugServer.class);
    }

    public DebugServer() {
        super(8080);
    }

    private void listItem(StringBuilder sb, Map.Entry<String, ? extends Object> entry) {
        sb.append("<li><code><b>").append(entry.getKey()).append("</b> = ").append(entry.getValue()).append("</code></li>");
    }

    @Override
    public Response serve(IHTTPSession session) {
        Map<String, List<String>> decodedQueryParameters = decodeParameters(session.getQueryParameterString());

        StringBuilder sb = new StringBuilder();
        sb.append("<html>");
        sb.append("<head><title>Debug Server</title></head>");
        sb.append("<body>");
        sb.append("<h1>Debug Server</h1>");

        sb.append("<p><blockquote><b>URI</b> = ").append(String.valueOf(session.getUri())).append("<br />");

        sb.append("<b>Method</b> = ").append(String.valueOf(session.getMethod())).append("</blockquote></p>");

        sb.append("<h3>Headers</h3><p><blockquote>").append(toString(session.getHeaders())).append("</blockquote></p>");

        sb.append("<h3>Parms</h3><p><blockquote>").append(toString(session.getParms())).append("</blockquote></p>");

        sb.append("<h3>Parms (multi values?)</h3><p><blockquote>").append(toString(decodedQueryParameters)).append("</blockquote></p>");

        try {
            Map<String, String> files = new HashMap<String, String>();
            session.parseBody(files);
            sb.append("<h3>Files</h3><p><blockquote>").append(toString(files)).append("</blockquote></p>");
        } catch (Exception e) {
            e.printStackTrace();
        }

        sb.append("</body>");
        sb.append("</html>");
        return newFixedLengthResponse(sb.toString());
    }

    private String toString(Map<String, ? extends Object> map) {
        if (map.size() == 0) {
            return "";
        }
        return unsortedList(map);
    }

    private String unsortedList(Map<String, ? extends Object> map) {
        StringBuilder sb = new StringBuilder();
        sb.append("<ul>");
        for (Map.Entry<String, ? extends Object> entry : map.entrySet()) {
            listItem(sb, entry);
        }
        sb.append("</ul>");
        return sb.toString();
    }
}