/*
 * Copyright (C) 2005 Luca Veltri - University of Parma - Italy
 * Copyright (C) 2009 The Sipdroid Open Source Project
 * 
 * This file is part of MjSip (http://www.mjsip.org)
 * 
 * MjSip is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * MjSip is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with MjSip; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 * 
 * Author(s):
 * Luca Veltri (luca.veltri@unipr.it)
 * Nitin Khanna, Hughes Systique Corp. (Reason: Android specific change, optmization, bug fix) 
 */

package org.zoolu.sip.call;

/* HSC CHANGES BEGIN */
// import org.zoolu.sip.call.*;
/* HSC CHANGES END */
import org.zoolu.sip.address.NameAddress;
import org.zoolu.sip.dialog.ExtendedInviteDialog;
import org.zoolu.sip.dialog.ExtendedInviteDialogListener;
import org.zoolu.sip.header.StatusLine;
import org.zoolu.sip.message.Message;
import org.zoolu.sip.provider.SipProvider;
import org.zoolu.sip.provider.SipStack;
import org.zoolu.tools.LogLevel;

/**
 * Class ExtendedCall extends basic SIP calls.
 * <p>
 * It implements: <br>- call transfer (REFER/NOTIFY methods)
 */
public class ExtendedCall extends Call implements ExtendedInviteDialogListener {

	ExtendedCallListener xcall_listener;

	Message refer;

	/** User name. */
	String username;

	/** User name. */
	String realm;

	/** User's passwd. */
	String passwd;

	/** Nonce for the next authentication. */
	String next_nonce;

	/** Qop for the next authentication. */
	String qop;

	/** Creates a new ExtendedCall. */
	public ExtendedCall(SipProvider sip_provider, String from_url,
			String contact_url, ExtendedCallListener call_listener) {
		super(sip_provider, from_url, contact_url, call_listener);
		this.xcall_listener = call_listener;
		this.refer = null;
		this.username = null;
		this.realm = null;
		this.passwd = null;
		this.next_nonce = null;
		this.qop = null;
	}

	/** Creates a new ExtendedCall specifing the sdp. */
	/*
	 * public ExtendedCall(SipProvider sip_provider, String from_url, String
	 * contact_url, String sdp, ExtendedCallListener call_listener) {
	 * super(sip_provider,from_url,contact_url,sdp,call_listener);
	 * xcall_listener=call_listener; }
	 */

	/** Creates a new ExtendedCall. */
	public ExtendedCall(SipProvider sip_provider, String from_url,
			String contact_url, String username, String realm, String passwd,
			ExtendedCallListener call_listener) {
		super(sip_provider, from_url, contact_url, call_listener);
		this.xcall_listener = call_listener;
		this.refer = null;
		this.username = username;
		this.realm = realm;
		this.passwd = passwd;
		this.next_nonce = null;
		this.qop = null;
	}

	/** Waits for an incoming call */
	public void listen() {
		if (username != null)
			dialog = new ExtendedInviteDialog(sip_provider, username, realm,
					passwd, this);
		else
			dialog = new ExtendedInviteDialog(sip_provider, this);
		dialog.listen();
	}

	/** Starts a new call, inviting a remote user (<i>r_user</i>) */
	public void call(String r_user, String from, String contact, String sdp) {
		printLog("calling " + r_user, LogLevel.MEDIUM);
		if (username != null)
			dialog = new ExtendedInviteDialog(sip_provider, username, realm,
					passwd, this);
		else
			dialog = new ExtendedInviteDialog(sip_provider, this);
		dialog.setFromAnonymous(mFromAnonymous);
		if (from == null)
			from = from_url;
		if (contact == null)
			contact = contact_url;
		if (sdp != null)
			local_sdp = sdp;
		if (local_sdp != null)
			dialog.invite(r_user, from, contact, local_sdp);
		else
			dialog.inviteWithoutOffer(r_user, from, contact);
	}

	/** Starts a new call with the <i>invite</i> message request */
	public void call(Message invite) {
		dialog = new ExtendedInviteDialog(sip_provider, this);
		dialog.setFromAnonymous(mFromAnonymous);
		local_sdp = invite.getBody();
		if (local_sdp != null)
			dialog.invite(invite);
		else
			dialog.inviteWithoutOffer(invite);
	}

	public void info(char c) {
		((ExtendedInviteDialog) dialog).info(c);
	}
	
	/** Requests a call transfer */
	public void transfer(String transfer_to) {
		((ExtendedInviteDialog) dialog).refer(new NameAddress(transfer_to));
	}

	/** Accepts a call transfer request */
	public void acceptTransfer() {
		((ExtendedInviteDialog) dialog).acceptRefer(refer);
	}

	/** Refuses a call transfer request */
	public void refuseTransfer() {
		((ExtendedInviteDialog) dialog).refuseRefer(refer);
	}

	/** Notifies the satus of an other call */
	public void notify(int code, String reason) {
		((ExtendedInviteDialog) dialog).notify(code, reason);
	}

	// ************** Inherited from InviteDialogListener **************

	/** When an incoming REFER request is received within the dialog */
	public void onDlgRefer(org.zoolu.sip.dialog.InviteDialog d,
			NameAddress refer_to, NameAddress referred_by, Message msg) {
		if (d != dialog) {
			printLog("NOT the current dialog", LogLevel.HIGH);
			return;
		}
		printLog("onDlgRefer(" + refer_to.toString() + ")", LogLevel.LOW);
		refer = msg;
		if (xcall_listener != null)
			xcall_listener.onCallTransfer(this, refer_to, referred_by, msg);
	}

	/** When a response is received for a REFER request within the dialog */
	public void onDlgReferResponse(org.zoolu.sip.dialog.InviteDialog d,
			int code, String reason, Message msg) {
		if (d != dialog) {
			printLog("NOT the current dialog", LogLevel.HIGH);
			return;
		}
		printLog("onDlgReferResponse(" + code + " " + reason + ")",
				LogLevel.LOW);
		if (code >= 200 && code < 300) {
			if (xcall_listener != null)
				xcall_listener.onCallTransferAccepted(this, msg);
		} else if (code >= 300) {
			if (xcall_listener != null)
				xcall_listener.onCallTransferRefused(this, reason, msg);
		}
	}

	/** When an incoming NOTIFY request is received within the dialog */
	public void onDlgNotify(org.zoolu.sip.dialog.InviteDialog d, String event,
			String sipfragment, Message msg) {
		if (d != dialog) {
			printLog("NOT the current dialog", LogLevel.HIGH);
			return;
		}
		printLog("onDlgNotify()", LogLevel.LOW);
		if (event.equals("refer")) {
			Message fragment = new Message(sipfragment);
			printLog("Notify: " + sipfragment, LogLevel.HIGH);
			if (fragment.isResponse()) {
				StatusLine status_line = fragment.getStatusLine();
				int code = status_line.getCode();
				String reason = status_line.getReason();
				if (code >= 200 && code < 300) {
					printLog("Call successfully transferred", LogLevel.MEDIUM);
					if (xcall_listener != null)
						xcall_listener.onCallTransferSuccess(this, msg);
				} else if (code >= 300) {
					printLog("Call NOT transferred", LogLevel.MEDIUM);
					if (xcall_listener != null)
						xcall_listener.onCallTransferFailure(this, reason, msg);
				}
			}
		}
	}

	/**
	 * When an incoming request is received within the dialog different from
	 * INVITE, CANCEL, ACK, BYE
	 */
	public void onDlgAltRequest(org.zoolu.sip.dialog.InviteDialog d,
			String method, String body, Message msg) {
	}

	/**
	 * When a response is received for a request within the dialog different
	 * from INVITE, CANCEL, ACK, BYE
	 */
	public void onDlgAltResponse(org.zoolu.sip.dialog.InviteDialog d,
			String method, int code, String reason, String body, Message msg) {
	}

	// **************************** Logs ****************************/

	/** Adds a new string to the default Log */
	protected void printLog(String str, int level) {
		if (log != null)
			log
					.println("ExtendedCall: " + str, level
							+ SipStack.LOG_LEVEL_CALL);
	}
}
