//author Emily Ecoff
//December 9, 2008
import java.io.*;
import java.net.*;
import java.util.*;
import java.util.Date;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.lang.Object;
import java.io.File;
import java.io.FileReader;
import java.io.BufferedReader;

public class  PluginComponent
{ 
	public static String filename;
	public static String [] keyword = new String[10];
	public static String Course;
	public static boolean keywordset = false;
	public static int keylength;
	public static Hashtable hash = new Hashtable(10,10);

	
	public static void main(String []args) throws Exception
	{
		
		if (args.length < 1)
        {
            System.out.println("Too few arguments.");
            System.out.println("Run it like this: java PluginComponent UniversalInterface_IP");
            System.exit(0);
        }

		Socket universal = new Socket(args[0], 7999);

		MsgEncoder mEncoder = new MsgEncoder();
		final MsgDecoder mDecoder = new MsgDecoder(universal.getInputStream());
		
		/* receiving thread*/
		Thread t = new Thread (new Runnable()
			{
				public void run()
				{
					KeyValueList kvInput;
					try
					{
						while(true)
						{		
							DateFormat dateformat = new SimpleDateFormat("yyyy_MM_dd");
							DateFormat dateformat2 = new SimpleDateFormat("HH:mm:ss");
							java.util.Date date = new java.util.Date();
							boolean append = true;
							kvInput = mDecoder.getMsg();
							System.out.println("**************Recieved Msg**************");
							int MsgID = Integer.parseInt(kvInput.getValue("MsgID"));
							
							if(MsgID == 1004){ //MsgID needs changed to appropriate ID
								//this is a class roster message
								Course = kvInput.getValue("CourseNo");
								filename = Course + "_" + dateformat.format(date) + ".txt";
								File file = new File(filename);
								boolean exists = file.exists();
								System.out.println(exists);
								FileWriter fw = new FileWriter(filename,append);
								if(!exists){
									fw.write("Attendance\r\n");
									fw.write(Course + "\r\n");
									fw.write("Teacher name: " + kvInput.getValue("TeacherFirst") + " " + kvInput.getValue("TeacherLast") + "\r\n");
									fw.write("Current Date: " + dateformat.format(date) + "\r\n\r\n");
								}
	
								int StudentCount = Integer.parseInt(kvInput.getValue("StudentCount"));
								int i = 0;
								for(i = 0; i<StudentCount; i++){
									String FName = kvInput.getValue("FirstName" + i);
									String LName = kvInput.getValue("LastName" + i);
									String State = kvInput.getValue("State" + i);
									int writer = ParseFile(filename, FName, LName);
									//fw = new FileWriter(filename,append);
									if (State.compareTo("offline") != 0 && writer == 1){
										fw.write(";");
										fw.write(FName + " ");
										fw.write(LName + "\r\n");
										fw.write("Logged in at: " + dateformat2.format(date) + "\r\n");
									}
								}
	
							    fw.close();
							}
							else if(MsgID == 1008){
								
								//this is a Chat Message
								Course = kvInput.getValue("CourseNo");
								filename = Course + "_" + dateformat.format(date) + ".txt";
								File file = new File(filename);
								boolean exists = file.exists();
								FileWriter fw = new FileWriter(filename,append);
								if(!exists){
									fw.write("Attendance\r\n");
									fw.write(Course + "\r\n");
									fw.write("Teacher name: " + kvInput.getValue("TeacherFirst") + " " + kvInput.getValue("TeacherLast") + "\r\n");
									fw.write("Current Date: " + dateformat.format(date) + "\r\n\r\n");
								}
								//This is a chat message
								String message = kvInput.getValue("Msg");
								int i=0;
								if(message.compareTo("tally") == 0 || message.compareTo("Tally")==0){
									fw.close();
									FinishAttendance(filename, Course);
								}
								else if(message.indexOf("KEYWORDSET")!= -1){
									String keywords = message.substring(11);
									String tempvar;
									Scanner scanner = new Scanner(keywords);
									scanner.useDelimiter(";");
									fw.write("The keywords are: \r\n");
									while ( scanner.hasNext() ){
										tempvar = scanner.next();
										keyword[i] = tempvar.trim();
										fw.write(keyword[i] + "\r\n");
										hash.put(Course+"key"+i, new String(keyword[i]));
										i++;
									}
									keylength=i;
									Integer integer = new Integer(keylength);
									hash.put(Course+"keylength", keylength);
								}
								else{
									String templength = hash.get(Course+"keylength").toString();
									int k = Integer.parseInt(templength);
									for(i=0; i < k; i++){
										String temp = hash.get(Course+"key"+i).toString();
							
										if (message.indexOf(temp) != -1){
											String QuestionF = kvInput.getValue("FromFirstName");
											String QuestionT = kvInput.getValue("FromLastName");
											fw.write("? " + dateformat2.format(date) +"= "+ QuestionF + " " + QuestionT + " asked about+ " + hash.get(Course+"key"+i) + "\r\n");
											}
										}
								
									}
								fw.close();
							}
						}
					}
					catch(Exception ex)
					{ System.out.println("Exception while sending to universal interface..");}
				}
			});
		t.setDaemon(true);
		t.start();

		try
		{
			BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
			while (true)
			{
				String input = br.readLine();
				KeyValueList kvList = new KeyValueList();	
				StringTokenizer st = new StringTokenizer(input, "$$$");
				while (st.hasMoreTokens()) 
				{
					kvList.addPair(st.nextToken(), st.nextToken());
				}

				mEncoder.sendMsg(kvList, universal.getOutputStream());
			}
		}
		catch(Exception ex)
		{ System.out.println("Exception reading from standard input..");}
	}
	public static int ParseFile(String Filename, String First, String Last){
		
		//File file = new File(Filename);
		try{
			FileInputStream fin = new FileInputStream(Filename);
			BufferedReader br = new BufferedReader(new InputStreamReader(fin));

			String line = null;

			while((line=br.readLine())!=null){
				if (line.compareTo(";" + First + " " + Last)==0){
					br.close();
					return 0;
				}
			}
			br.close();
		}
		catch(Exception e){
			e.printStackTrace();
		}
		return 1;
	}
	public static void FinishAttendance(String Filename, String Course){
		try{
			FileInputStream fin = new FileInputStream(Filename);
			BufferedReader br = new BufferedReader(new InputStreamReader(fin));
			String [] name = new String[20];
			String [] name2 = new String[20];
			String [] keys = new String[20];
			String [] keywords = new String[20];
			int i=0;
			int r=0;
			int num=0, total_key=0;
			String temp, teacher="";
			for (i=0; i<20; i++){
				keywords[i] = "";
			}
			String line = null;
			
			while((line=br.readLine())!=null){
		
				if (line.indexOf("Teacher name:")!= -1){
					teacher = line.substring(14);
				}
				else if(line.indexOf("The keywords are:")!=-1){
					String templength = hash.get(Course+"keylength").toString();
					int k = Integer.parseInt(templength);
					for(i=0; i < k; i++){
						keywords[i]=br.readLine();
					}
					total_key = i;
				}
				else if(line.startsWith(";")){
					name[r] = line.substring(1);
					r++;
					num = r;
				}
				else if(line.startsWith("?")){
					int t = line.indexOf("=");
					int f = line.indexOf("asked");
					int p = line.indexOf("+");
					i = 0;
					int u = 0;
					name2[i] = line.substring(t+2, f-1);
					for(u=0;u<num;u++){
						if (name[u].compareTo(name2[i])==0){
							temp = line.substring(p+2);
							temp.trim();
							if(keys[u]==null){
								keys[u]=temp;
							}
							else{
							keys[u]=keys[u].concat(" " +temp);
							}
						}
					}
					
					i++;
				}
			}
			br.close();
			DateFormat dateformat = new SimpleDateFormat("yyyy_MM_dd");
			java.util.Date date = new java.util.Date();
			boolean append = true;
			filename = "Attend" + Course + "_" + dateformat.format(date) + ".txt";
			File file = new File(filename);
			FileWriter fw = new FileWriter(filename,append);
			fw.write(teacher + ", ");
			i=0;
			for (i=0; i<total_key; i++){
				fw.write(keywords[i] + ", ");
			}
			fw.write("\r\n");
			fw.write(num+" students attended "+Course+" on: " + dateformat.format(date) + "\r\n");
			for(i=0;i<num;i++){
				fw.write(name[i] + ", ");
				if(keys[i]==null){
					fw.write("\r\n");
					continue;
				}
				else{
				fw.write(keys[i] + ", ");
				}
				fw.write("\r\n");
			}
			fw.close();
		}
		catch(Exception e){
			e.printStackTrace();
		}
	}
}