package net.java.sip.communicator.impl.neomedia;

import gnu.java.zrtp.ZrtpConfigure;
import gnu.java.zrtp.ZrtpConstants;

public class ZrtpConfigureUtils {
    
    public static <T extends Enum<T>>String getPropertyID(T algo) {
        Class<T> clazz = algo.getDeclaringClass();
        return "net.java.sip.communicator." + clazz.getName().replace('$', '_');
    }

    public static ZrtpConfigure getZrtpConfiguration() {
        ZrtpConfigure active = new ZrtpConfigure();
        setupConfigure(ZrtpConstants.SupportedPubKeys.DH2K, active);
        setupConfigure(ZrtpConstants.SupportedHashes.S256, active);
        setupConfigure(ZrtpConstants.SupportedSymCiphers.AES1, active);
        setupConfigure(ZrtpConstants.SupportedSASTypes.B32, active);
        setupConfigure(ZrtpConstants.SupportedAuthLengths.HS32, active);
        return active;
        
    }
    private static <T extends Enum<T>> void setupConfigure(T algo, ZrtpConfigure active) {

        
        String id = ZrtpConfigureUtils.getPropertyID(algo);
        String savedConf = NeomediaActivator.getConfigurationService().getString(id);
        if (savedConf == null)
            savedConf = "";
        
        Class <T> clazz = algo.getDeclaringClass();
        String savedAlgos[] = savedConf.split(";");

        // Configure saved algorithms as active
        for (String str : savedAlgos) {
            try {
                T algoEnum = Enum.valueOf(clazz, str);
                if (algoEnum != null) {
                    active.addAlgo(algoEnum);
                }
            } catch (IllegalArgumentException e) {
                continue;
            }
        }
    }
}