///////////////////////////////////////////////////////////////////////////////
function OnInit(data){
	data.name = "Command.File: JoinMP3";
	data.desc = "Join mp3 music files (and other?) with ffmpeg.exe.";
	data.copyright = "DOS - Directory Opus Society 2o14. o)";
	data.version = "0.1";
	data.default_enable = false;

	data.config["FFMpegExe"] = "c:\\program files\\ffmpeg\\bin\\ffmpeg.exe";
	data.config["PauseAtEnd"] = true;

	var cmd	= data.AddCommand();
    cmd.name		= "JoinMP3";
    cmd.method		= "Command_JoinMP3";
    cmd.desc		= data.desc;
    cmd.label		= "JoinMP3";
	cmd.template	= "FFMPEGEXE/K,TARGETFILE/K,FILES/M,PAUSEATEND/K";
}
///////////////////////////////////////////////////////////////////////////////
function Command_JoinMP3(data) {
	DOpus.Output("JoinMP3:");
	var files = GetFiles(data);
	if (!files || files.count==1){
		DOpus.Output("Not enough files given.");
		return false;
	}
	data.func.command.ClearFiles();
	data.func.command.SetType("msdos");

	var pause		= ForceBoolean(GetParameter(data, "pauseatend", "PauseAtEnd", true));
	var ffmpegExe	= GetParameter(data, "ffmpegexe", "FFMpegExe", "c:\\program files\\ffmpeg\\bin\\ffmpeg.exe");
	if (!DOpus.FSUtil.Exists(ffmpegExe)){
		DOpus.Output("FFMpeg.exe not found ["+ffmpegExe+"]. Check FFMPEGEXE cmdline parameter or script-config.");
		return false;
	}

	var firstFile = "";
	var fileNamesJoined = "";
	for(var file;!files.enumerator.atEnd();) {
		file=files.enumerator.item(); files.enumerator.moveNext();
		DOpus.Output("File to join: "+file);
		fileNamesJoined+=file;
		if (firstFile=="") firstFile=file;
		if (!files.enumerator.atEnd()) fileNamesJoined+="|";
	}

	if (!(targetFile = GetParameter(data, "targetfile", "targetfile", firstFile.path+"\\joined_"+firstFile.name_stem+"_joined"+firstFile.ext))){
		DOpus.Output("No targetfile given. Check TARGETFILE cmdline parameter or script-config.");
		return false;
	}
	DOpus.Output("Target: " + targetFile);

	var cmd = '"'+ffmpegExe+'" -i "concat:'+fileNamesJoined+'" -acodec copy "'+targetFile+'"';
	DOpus.Output("Command: "+cmd);
	data.func.command.AddLine(cmd);

	if (pause===true)
		data.func.command.AddLine("Pause");
	data.func.command.Run();
    return true;
}
///////////////////////////////////////////////////////////////////////////////
function GetFiles(data){
	if (data.func.args.got_arg.files)
		var files = data.func.args.files;
	else if (data.func.sourcetab.selected_files.count)
		var files = data.func.sourcetab.selected_files;
	else
		var files = data.func.sourcetab.files;
	return { enumerator:new Enumerator(files), count:files.count};
}
///////////////////////////////////////////////////////////////////////////////
function GetParameter( data, templateName, configName, defaultValue){
	if (templateName && data.func.args.got_arg[templateName])
		return data.func.args[templateName]
	if (configName && Script.config[configName]!=undefined){
		switch(typeof(Script.config[configName])){
			case "string":
				if(Script.config[configName]!=="")
					return Script.config[configName];
				break;
			case "boolean":
				return Script.config[configName];
		}
	}
	return defaultValue;
}
///////////////////////////////////////////////////////////////////////////////
function ForceBoolean(variant){
	switch(variant+"".toLowerCase()){
		case "true": case "yes": case "1": return true;
		case "false": case "no": case "0": case null: return false;
		default: return Boolean(string);
	}
}