package net.i2p.router.web;

import java.util.List;
import net.i2p.data.DataHelper;
import net.i2p.crypto.TrustedUpdate;
import net.i2p.router.RouterContext;

public class ConfigUpdateHelper {
    private RouterContext _context;
    /**
     * Configure this bean to query a particular router context
     *
     * @param contextId begging few characters of the routerHash, or null to pick
     *                  the first one we come across.
     */
    public void setContextId(String contextId) {
        try {
            _context = ContextHelper.getContext(contextId);
        } catch (Throwable t) {
            t.printStackTrace();
        }
    }

    public ConfigUpdateHelper() {}
    
    public boolean updateAvailable() {
        return true;
    }
    
    public String getNewsURL() {
        String url = _context.getProperty(ConfigUpdateHandler.PROP_NEWS_URL);
        if (url != null)
            return url;
        else
            return ConfigUpdateHandler.DEFAULT_NEWS_URL;
    }
    public String getUpdateURL() {
        String url = _context.getProperty(ConfigUpdateHandler.PROP_UPDATE_URL);
        if (url != null)
            return url;
        else
            return ConfigUpdateHandler.DEFAULT_UPDATE_URL;
    }
    public String getProxyHost() {
        String host = _context.getProperty(ConfigUpdateHandler.PROP_PROXY_HOST);
        if (host != null)
            return host;
        else
            return ConfigUpdateHandler.DEFAULT_PROXY_HOST;
    }
    public String getProxyPort() {
        String port = _context.getProperty(ConfigUpdateHandler.PROP_PROXY_PORT);
        if (port != null)
            return port;
        else
            return ConfigUpdateHandler.DEFAULT_PROXY_HOST;
    }
    
    public String getUpdateThroughProxy() {
        String proxy = _context.getProperty(ConfigUpdateHandler.PROP_SHOULD_PROXY, ConfigUpdateHandler.DEFAULT_SHOULD_PROXY);
        if (Boolean.valueOf(proxy).booleanValue()) 
            return "<input type=\"checkbox\" value=\"true\" name=\"updateThroughProxy\" checked=\"true\" >";
        else
            
            return "<input type=\"checkbox\" value=\"true\" name=\"updateThroughProxy\" >";
    }
    
    private static final long PERIODS[] = new long[] { 12*60*60*1000l, 24*60*60*1000l, 48*60*60*1000l, -1l };
    
    public String getRefreshFrequencySelectBox() {
        String freq = _context.getProperty(ConfigUpdateHandler.PROP_REFRESH_FREQUENCY);
        if (freq == null) freq = ConfigUpdateHandler.DEFAULT_REFRESH_FREQUENCY;
        long ms = -1;
        try { 
            ms = Long.parseLong(freq);
        } catch (NumberFormatException nfe) {}

        StringBuffer buf = new StringBuffer(256);
        buf.append("<select name=\"refreshFrequency\">");
        for (int i = 0; i < PERIODS.length; i++) {
            buf.append("<option value=\"").append(PERIODS[i]);
            if (PERIODS[i] == ms)
                buf.append("\" selected=\"true\"");
            
            if (PERIODS[i] == -1)
                buf.append("\">Never</option>\n");
            else
                buf.append("\">Every ").append(DataHelper.formatDuration(PERIODS[i])).append("</option>\n");
        }
        buf.append("</select>\n");
        return buf.toString();
    }
    
    public String getUpdatePolicySelectBox() {
        String policy = _context.getProperty(ConfigUpdateHandler.PROP_UPDATE_POLICY);
        if (policy == null) policy = ConfigUpdateHandler.DEFAULT_UPDATE_POLICY;
        
        StringBuffer buf = new StringBuffer(256);
        buf.append("<select name=\"updatePolicy\">");
        
        if ("notify".equals(policy))
            buf.append("<option value=\"notify\" selected=\"true\">Notify only</option>");
        else
            buf.append("<option value=\"notify\">Notify only</option>");

        if ("install".equals(policy))
            buf.append("<option value=\"install\" selected=\"true\">Download and install</option>");
        else
            buf.append("<option value=\"install\">Download and install</option>");
        
        buf.append("</select>\n");
        return buf.toString();
    }
    
    public String getTrustedKeys() {
        StringBuffer buf = new StringBuffer(1024);
        TrustedUpdate up = new TrustedUpdate(_context);
        List keys = up.getTrustedKeys();
        for (int i = 0; i < keys.size(); i++) 
            buf.append((String)keys.get(i)).append('\n');
        return buf.toString();
    }
}