package net.java.otr4j;

import java.security.KeyPair;

import java.security.KeyPairGenerator;

import java.security.NoSuchAlgorithmException;

import java.util.ArrayList;

import net.java.otr4j.crypto.KeyAndSession;

import net.java.otr4j.session.SessionID;

import com.beem.project.beem.service.ChatAdapter;

public class OtrEngineHostImpl implements OtrEngineHost{

	private ChatAdapter mChat;

	private OtrPolicy policy;

    public String lastInjectedMessage;

    private ArrayList<KeyAndSession> keyring = new ArrayList<KeyAndSession>();

	public OtrEngineHostImpl(ChatAdapter chat, OtrPolicy policy){

		mChat = chat;

		this.policy = policy;

	}

	@Override

	public KeyPair getKeyPair(SessionID sessionID) {

		for(int i = 0; i<keyring.size(); i++){

			if(sessionID.equals(keyring.get(i).getSessionID())){

				return keyring.get(i).getKeyPair();

			}

		}

		 KeyPairGenerator kg;

         try {

                 kg = KeyPairGenerator.getInstance("DSA");

         } catch (NoSuchAlgorithmException e) {

                 e.printStackTrace();

                 return null;

         }

         KeyAndSession kp = new KeyAndSession(kg.genKeyPair(), sessionID);

         keyring.add(kp);

         return kp.getKeyPair();

	}

	@Override

	public OtrPolicy getSessionPolicy(SessionID sessionID) {

		return this.policy;

	}

	@Override

	public void injectMessage(SessionID sessionID, String msg) {

		mChat.sendMessage(msg);

	}

	@Override

	public void showError(SessionID sessionID, String error) {

	//	mChat.otrStatusDisplay.setText(""+error);		

	}

	@Override

	public void showWarning(SessionID sessionID, String warning) {

		//mChat.otrStatusDisplay.setText(""+warning);

	}

}