/* $Id$ */
/*
 * Copyright (C) 2013 Teluu Inc. (http://www.teluu.com)
 *
 * This program 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.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package org.pjsip.pjsua2.app;

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;

import org.pjsip.pjsua2.*;

public class MainActivity extends Activity implements Handler.Callback, MyAppObserver {
	public static MyApp app = null;
	public static MyCall currentCall = null;
	public static MyAccount account = null;
	public static AccountConfig accCfg = null;
	
	private ListView buddyListView;
	private SimpleAdapter buddyListAdapter;
	private int buddyListSelectedIdx = -1;
    ArrayList<Map<String, String>> buddyList;
    private String lastRegStatus = "";

	private final Handler handler = new Handler(this);
	public class MSG_TYPE {
		public final static int INCOMING_CALL = 1;
		public final static int CALL_STATE = 2;
		public final static int REG_STATE = 3;
		public final static int BUDDY_STATE = 4;
	}

	private HashMap<String, String> putData(String uri, String status) {
		HashMap<String, String> item = new HashMap<String, String>();
		item.put("uri", uri);
		item.put("status", status);
		return item;
	}
	
	private void showCallActivity() {
        Intent intent = new Intent(this, CallActivity.class);
        intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        startActivity(intent);
	}

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		if (app == null) {
			app = new MyApp();
			/* Wait for GDB to init */
			if ((getApplicationInfo().flags & ApplicationInfo.FLAG_DEBUGGABLE) != 0) {
				try {
					Thread.sleep(5000);
				} catch (InterruptedException e) {}
			}
			
		    app.init(this, getFilesDir().getAbsolutePath());
		}
		
	    if (app.accList.size() == 0) {
	    	accCfg = new AccountConfig();
	    	accCfg.setIdUri("sip:localhost");
	    	account = app.addAcc(accCfg);
	    } else {
	    	account = app.accList.get(0);
	    	accCfg = account.cfg;
	    }
	    
		buddyList = new ArrayList<Map<String, String>>();
		for (int i = 0; i < account.buddyList.size(); i++) {
			buddyList.add(putData(account.buddyList.get(i).cfg.getUri(),
								  account.buddyList.get(i).getStatusText()));
		}

		String[] from = { "uri", "status" };
	    int[] to = { android.R.id.text1, android.R.id.text2 };
	    buddyListAdapter = new SimpleAdapter(this, buddyList, android.R.layout.simple_list_item_2, from, to);
	    
		buddyListView = (ListView) findViewById(R.id.listViewBuddy);;
	    buddyListView.setAdapter(buddyListAdapter);
	    buddyListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
	    	@Override
	    	public void onItemClick(AdapterView<?> parent, final View view,
	    			int position, long id) 
	    	{
	    		view.setSelected(true);
	    		buddyListSelectedIdx = position;
	    	}
	    });
	    
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		switch (item.getItemId()) {
		case R.id.action_acc_config:
			dlgAccountSetting();
			break;

		case R.id.action_quit:
			Message m = Message.obtain(handler, 0);
			m.sendToTarget();
			break;
			
		default:
			break;
		}

		return true;
	} 	

	@Override
	public boolean handleMessage(Message m) {
		
		if (m.what == 0) {
			
			app.deinit();
			finish();
			Runtime.getRuntime().gc();
			android.os.Process.killProcess(android.os.Process.myPid());
			
		} else if (m.what == MSG_TYPE.CALL_STATE) {
			
			CallInfo ci = (CallInfo) m.obj;
			
			/* Forward the message to CallActivity */
			if (CallActivity.handler_ != null) {
				Message m2 = Message.obtain(CallActivity.handler_, MSG_TYPE.CALL_STATE, ci);
				m2.sendToTarget();
			}
			
			if (ci.getState() == pjsip_inv_state.PJSIP_INV_STATE_DISCONNECTED)
				currentCall = null;
			
		} else if (m.what == MSG_TYPE.BUDDY_STATE) {
			
			MyBuddy buddy = (MyBuddy) m.obj;
			int idx = account.buddyList.indexOf(buddy);
			if (idx >= 0) {
				buddyList.get(idx).put("status", buddy.getStatusText());
				buddyListAdapter.notifyDataSetChanged();
				// TODO: selection color/mark is gone after this,
				//       dont know how to return it back.
				//buddyListView.setSelection(buddyListSelectedIdx);
				//buddyListView.performItemClick(buddyListView, buddyListSelectedIdx,
				//							   buddyListView.getItemIdAtPosition(buddyListSelectedIdx));
				
				/* Return back Call activity */
				notifyCallState(currentCall);
			}
			
		} else if (m.what == MSG_TYPE.REG_STATE) {
			
			String msg_str = (String) m.obj;
			lastRegStatus = msg_str;
			
		} else if (m.what == MSG_TYPE.INCOMING_CALL) {
			
			/* Incoming call */
			final MyCall call = (MyCall) m.obj;
			CallOpParam prm = new CallOpParam();
			
			/* Only one call at anytime */
			if (currentCall != null) {
				prm.setStatusCode(pjsip_status_code.PJSIP_SC_BUSY_HERE);
				try {
					call.hangup(prm);
				} catch (Exception e) {}
				return true;
			}

			/* Answer with ringing */
			prm.setStatusCode(pjsip_status_code.PJSIP_SC_RINGING);
			try {
				call.answer(prm);
			} catch (Exception e) {}
			
			currentCall = call;
			showCallActivity();

		} else {
			
			/* Message not handled */
			return false;
			
		}
			
		return true;
	}
	

	private void dlgAccountSetting() {
		
		LayoutInflater li = LayoutInflater.from(this);
		View view = li.inflate(R.layout.dlg_account_config, null);
		
		if (!lastRegStatus.isEmpty()) {
			TextView tvInfo = (TextView)view.findViewById(R.id.textViewInfo);
			tvInfo.setText("Last status: " + lastRegStatus);
		}

		AlertDialog.Builder adb = new AlertDialog.Builder(this);
		adb.setView(view);
		adb.setTitle("Account Settings");

		final EditText etId    = (EditText)view.findViewById(R.id.editTextId);
		final EditText etReg   = (EditText)view.findViewById(R.id.editTextRegistrar);
		final EditText etProxy = (EditText)view.findViewById(R.id.editTextProxy);
		final EditText etUser  = (EditText)view.findViewById(R.id.editTextUsername);
		final EditText etPass  = (EditText)view.findViewById(R.id.editTextPassword);
		
		etId.   setText(accCfg.getIdUri());
		etReg.  setText(accCfg.getRegConfig().getRegistrarUri());
		StringVector proxies = accCfg.getSipConfig().getProxies();
		if (proxies.size() > 0)
			etProxy.setText(proxies.get(0));
		else
			etProxy.setText("");
		AuthCredInfoVector creds = accCfg.getSipConfig().getAuthCreds();
		if (creds.size() > 0) {
			etUser. setText(creds.get(0).getUsername());
			etPass. setText(creds.get(0).getData());
		} else {
			etUser. setText("");
			etPass. setText("");
		}
		
		adb.setCancelable(false);
		adb.setPositiveButton("OK",
			  new DialogInterface.OnClickListener() {
			    public void onClick(DialogInterface dialog,int id) {
			    	String acc_id 	 = etId.getText().toString();
			    	String registrar = etReg.getText().toString();
			    	String proxy 	 = etProxy.getText().toString();
			    	String username  = etUser.getText().toString();
			    	String password  = etPass.getText().toString();
			    	
			    	accCfg.setIdUri(acc_id);
			    	accCfg.getRegConfig().setRegistrarUri(registrar);
					AuthCredInfoVector creds = accCfg.getSipConfig().getAuthCreds();
					creds.clear();
					if (!username.isEmpty()) {
						creds.add(new AuthCredInfo("Digest", "*", username, 0, password));
					}
					StringVector proxies = accCfg.getSipConfig().getProxies();
					proxies.clear();
					if (!proxy.isEmpty()) {
						proxies.add(proxy);
					}
					
					/* Finally */
					lastRegStatus = "";
					try {
						account.modify(accCfg);
					} catch (Exception e) {}
			    }
			  });
		adb.setNegativeButton("Cancel",
			  new DialogInterface.OnClickListener() {
			    public void onClick(DialogInterface dialog,int id) {
				dialog.cancel();
			    }
			  });

		AlertDialog ad = adb.create();
		ad.show();
	}
	
	
	public void makeCall(View view) {
		if (buddyListSelectedIdx == -1)
			return;
		
		/* Only one call at anytime */
		if (currentCall != null) {
			return;
		}
		
		HashMap<String, String> item = (HashMap<String, String>) buddyListView.getItemAtPosition(buddyListSelectedIdx);
		String buddy_uri = item.get("uri");
		
		MyCall call = new MyCall(account, -1);
		CallOpParam prm = new CallOpParam();
		CallSetting opt = prm.getOpt();
		opt.setAudioCount(1);
		opt.setVideoCount(0);

		try {
			call.makeCall(buddy_uri, prm);
		} catch (Exception e) {
			currentCall = null;
			return;
		}
		
		currentCall = call;
		showCallActivity();
	}

	private void dlgAddEditBuddy(BuddyConfig initial) {
		final BuddyConfig cfg = new BuddyConfig();
		final BuddyConfig old_cfg = initial;
		final boolean is_add = initial == null;
		
		LayoutInflater li = LayoutInflater.from(this);
		View view = li.inflate(R.layout.dlg_add_buddy, null);

		AlertDialog.Builder adb = new AlertDialog.Builder(this);
		adb.setView(view);

		final EditText etUri    = (EditText)view.findViewById(R.id.editTextUri);
		final CheckBox cbSubs  = (CheckBox)view.findViewById(R.id.checkBoxSubscribe);

		if (is_add) {
			adb.setTitle("Add Buddy");
		} else {
			adb.setTitle("Edit Buddy");
			etUri. setText(initial.getUri());
			cbSubs.setChecked(initial.getSubscribe());
		}

		adb.setCancelable(false);
		adb.setPositiveButton("OK",
			  new DialogInterface.OnClickListener() {
			    public void onClick(DialogInterface dialog,int id) {
			    	cfg.setUri(etUri.getText().toString());
			    	cfg.setSubscribe(cbSubs.isChecked());
			    	
			    	if (is_add) {
			    		account.addBuddy(cfg);
						buddyList.add(putData(cfg.getUri(), ""));
						buddyListAdapter.notifyDataSetChanged();
						buddyListSelectedIdx = -1;
			    	} else {
			    		if (!old_cfg.getUri().equals(cfg.getUri())) {
			    			account.delBuddy(buddyListSelectedIdx);
			    			account.addBuddy(cfg);
							buddyList.remove(buddyListSelectedIdx);
							buddyList.add(putData(cfg.getUri(), ""));
			    			buddyListAdapter.notifyDataSetChanged();
			    			buddyListSelectedIdx = -1;
			    		} else if (old_cfg.getSubscribe() != cfg.getSubscribe()) {
			    			MyBuddy bud = account.buddyList.get(buddyListSelectedIdx);
							try {
				    			bud.subscribePresence(cfg.getSubscribe());
							} catch (Exception e) {}
			    		}
			    	}
			    }
			  });
		adb.setNegativeButton("Cancel",
			  new DialogInterface.OnClickListener() {
			    public void onClick(DialogInterface dialog,int id) {
				dialog.cancel();
			    }
			  });

		AlertDialog ad = adb.create();
		ad.show();
	}
	
	public void addBuddy(View view) {
		dlgAddEditBuddy(null);
	}

	public void editBuddy(View view) {
		if (buddyListSelectedIdx == -1)
			return;
		
		BuddyConfig old_cfg = account.buddyList.get(buddyListSelectedIdx).cfg;
		dlgAddEditBuddy(old_cfg);
	}
	
	public void delBuddy(View view) {
		if (buddyListSelectedIdx == -1)
			return;
		
		final HashMap<String, String> item = (HashMap<String, String>) buddyListView.getItemAtPosition(buddyListSelectedIdx);
		String buddy_uri = item.get("uri");
		
		DialogInterface.OnClickListener ocl = new DialogInterface.OnClickListener() {
		    @Override
		    public void onClick(DialogInterface dialog, int which) {
		        switch (which) {
		        case DialogInterface.BUTTON_POSITIVE:
		        	account.delBuddy(buddyListSelectedIdx);
		    		buddyList.remove(item);
		    		buddyListAdapter.notifyDataSetChanged();
		    		buddyListSelectedIdx = -1;
		            break;
		        case DialogInterface.BUTTON_NEGATIVE:
		            break;
		        }
		    }
		};

		AlertDialog.Builder adb = new AlertDialog.Builder(this);
		adb.setTitle(buddy_uri);
		adb.setMessage("\nDelete this buddy?\n");
		adb.setPositiveButton("Yes", ocl);
		adb.setNegativeButton("No", ocl);
		adb.show();
	}
	
	
	/*
	 * === MyAppObserver ===
	 * 
	 * As we cannot do UI from worker thread, the callbacks mostly just send
	 * a message to UI/main thread.
	 */
	
	public void notifyIncomingCall(MyCall call) {
		Message m = Message.obtain(handler, MSG_TYPE.INCOMING_CALL, call);
		m.sendToTarget();
	}

	public void notifyRegState(pjsip_status_code code, String reason, int expiration) {
		String msg_str = "";
		if (expiration == 0)
			msg_str += "Unregistration";
		else
			msg_str += "Registration";
		
		if (code.swigValue()/100 == 2)
			msg_str += " successful";
		else
			msg_str += " failed: " + reason;
		
		Message m = Message.obtain(handler, MSG_TYPE.REG_STATE, msg_str);
		m.sendToTarget();
	}
	
	public void notifyCallState(MyCall call) {
		if (currentCall == null || call.getId() != currentCall.getId())
			return;
		
		CallInfo ci;
		try {
			ci = call.getInfo();
		} catch (Exception e) {
			ci = null;
		}
		Message m = Message.obtain(handler, MSG_TYPE.CALL_STATE, ci);
		m.sendToTarget();
	}
	
	public void notifyBuddyState(MyBuddy buddy) {
		Message m = Message.obtain(handler, MSG_TYPE.BUDDY_STATE, buddy);
		m.sendToTarget();
	}

	/* === end of MyAppObserver ==== */

}