// Espruino programmer example.
//
// Note: this application only works on devices that support 
// OTG and allow access to serial devices.
//
// Known to work: Nexus7, GalaxyS3, ExperiaZUltra    
// Don't work: Nexus4, GalaxyS1, GalaxyS4

//Global variables.
var usb = null;

//Called when application is started.
function OnStart()
{
    //Create a layout with objects vertically centered.
    lay = app.CreateLayout( "linear", "VCenter,FillXY" );   
    
    //Create title text.
    txt = app.CreateText("Espruino");
    txt.SetTextSize( 22 );
    txt.SetMargins( 0,0,0,0.01 );
    lay.AddChild( txt );
    
    //Create an edit box containing an example espruino program.
    var s = "var state=0;\n\nfunction flash()\n{\n"; 
    s += " digitalWrite( LED1, state );\n";
    s += " state = !state;\n";
    s += "}\n";
    s += "setInterval( flash, 200 );\n";
    edt = app.CreateTextEdit( s, 0.96, 0.8, "NoSpell" );
    lay.AddChild( edt );
    
    //Create a horizontal layout for buttons.
    layBut = app.CreateLayout("Linear", "Horizontal");
    lay.AddChild( layBut );
    
    //Create an connect button.
    btnConnect = app.CreateButton( "Connect", 0.23, 0.1 );
    btnConnect.SetOnTouch( btnConnect_OnTouch );
	layBut.AddChild( btnConnect );
    
    //Create an send button.
	btnSend = app.CreateButton( "Send", 0.23, 0.1 );
    btnSend.SetOnTouch( btnSend_OnTouch );
	layBut.AddChild( btnSend );
    
     //Create a reset button.
    btnReset = app.CreateButton( "Reset", 0.23, 0.1 );
    btnReset.SetOnTouch( btnReset_OnTouch );
	layBut.AddChild( btnReset );
    
    //Create an save button.
    btnSave = app.CreateButton( "Save", 0.23, 0.1 );
    btnSave.SetOnTouch( btnSave_OnTouch );
	layBut.AddChild( btnSave );

	//Add layout to app.	
	app.AddLayout( lay );
}

//Called when user touches connect button.
function btnConnect_OnTouch()
{
    //Create USB serial object.
	usb = app.CreateUSBSerial();
}

//Called when user touches send button.
function btnSend_OnTouch()
{ 
    //Get rid of blank lines, spaces etc that cause
    //a problem for Espruino.
    var s = edt.GetText();
    s = s.replace( RegExp("\n\n+","gim"), "\n" );
    s = s.replace( RegExp("\n +","gim"), "\n" );
    s = s.replace( RegExp("\\)\\s*\\{","gim"), "\)\{" );
    s = s.replace( RegExp(", +","gim"), "," );
    s = s.replace( RegExp("\\( +","gim"), "\(" );
    s = s.replace( RegExp(" +\\)","gim"), "\)" );
    
    //alert( s );
    //Send program to Espruino.
    Send( "echo(0);" + s );
}

//Called when user touches reset button.
function btnReset_OnTouch()
{
    //Send reset and turn led's off.
    var s = "echo(0);\n"
    s += "reset();\n";
    s += "digitalWrite(LED1,0);\n";
    s += "digitalWrite(LED2,0);\n";
    Send( s );
}

//Called when user touches save button.
function btnSave_OnTouch()
{
    var s = "echo(0);\n"
    s += "save();\n";
    Send( s );
}

//Check connection and send data.
function Send( s )
{
    if( usb ) usb.Write( s );
    else app.ShowPopup( "Please connect" );
}