/**
 * 
 */
package hu.herba.codejam;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;

/**
 * Base functionality, helper functions for CodeJam problem solver utilities.
 * 
 * @author csorbazoli
 */
public abstract class AbstractCodeJamBase {
    private static final String EXT_OUT = ".out";
    protected static final int STREAM_TYPE = 0;
    protected static final int FILE_TYPE = 1;
    protected static final int READER_TYPE = 2;
    private static final String DEFAULT_INPUT = "test_input";
    private static final String DEFAULT_OUTPUT = "test_output";

    private final File inputFolder;
    private final File outputFolder;

    public AbstractCodeJamBase(String[] args, int type) {
	String inputFolderName = AbstractCodeJamBase.DEFAULT_INPUT;
	String outputFolderName = AbstractCodeJamBase.DEFAULT_OUTPUT;
	if (args.length > 0) {
	    inputFolderName = args[0];
	}
	this.inputFolder = new File(inputFolderName);
	if (!this.inputFolder.exists()) {
	    this.showUsage("Input folder '" + this.inputFolder.getAbsolutePath() + "' not exists!");
	}
	if (args.length > 1) {
	    outputFolderName = args[1];
	}
	this.outputFolder = new File(outputFolderName);
	if (this.outputFolder.exists() && !this.outputFolder.canWrite()) {
	    this.showUsage("Output folder '" + this.outputFolder.getAbsolutePath() + "' not writeable!");
	} else if (!this.outputFolder.exists() && !this.outputFolder.mkdirs()) {
	    this.showUsage("Could not create output folder '" + this.outputFolder.getAbsolutePath() + "'!");
	}
	File[] inputFiles = this.inputFolder.listFiles();
	for (File inputFile : inputFiles) {
	    this.processInputFile(inputFile, type);
	}
    }

    /**
     * @return the inputFolder
     */
    public File getInputFolder() {
	return this.inputFolder;
    }

    /**
     * @return the outputFolder
     */
    public File getOutputFolder() {
	return this.outputFolder;
    }

    /**
     * @param input
     *            input reader
     * @param output
     *            output writer
     * @throws IOException
     *             in case input or output fails
     * @throws IllegalArgumentException
     *             in case the given input is invalid
     */
    @SuppressWarnings("unused")
    protected void process(BufferedReader reader, PrintWriter pw) throws IOException, IllegalArgumentException {
	System.out.println("NEED TO IMPLEMENT (reader/writer)!!!");
	System.exit(-2);
    }

    /**
     * @param input
     *            input file
     * @param output
     *            output file (will be overwritten)
     * @throws IOException
     *             in case input or output fails
     * @throws IllegalArgumentException
     *             in case the given input is invalid
     */
    protected void process(File input, File output) throws IOException, IllegalArgumentException {
	System.out.println("NEED TO IMPLEMENT (file/file)!!!");
	System.exit(-2);
    }

    /**
     * @param input
     *            input stream
     * @param output
     *            output stream
     * @throws IOException
     *             in case input or output fails
     * @throws IllegalArgumentException
     *             in case the given input is invalid
     */
    protected void process(InputStream input, OutputStream output) throws IOException, IllegalArgumentException {
	System.out.println("NEED TO IMPLEMENT (stream/stream)!!!");
	System.exit(-2);
    }

    /**
     * @param type
     * @param input
     * @param output
     */
    private void processInputFile(File input, int type) {
	long starttime = System.currentTimeMillis();
	System.out.println("Processing '" + input.getAbsolutePath() + "'...");
	File output = new File(this.outputFolder, input.getName() + AbstractCodeJamBase.EXT_OUT);
	if (type == AbstractCodeJamBase.STREAM_TYPE) {
	    InputStream is = null;
	    OutputStream os = null;
	    try {
		is = new FileInputStream(input);
		os = new FileOutputStream(output);
		this.process(is, os);
	    } catch (FileNotFoundException e) {
		this.showUsage("FileNotFound: " + e.getLocalizedMessage());
	    } catch (IllegalArgumentException excIA) {
		this.showUsage(excIA.getLocalizedMessage());
	    } catch (Exception exc) {
		System.out.println("Program failed: " + exc.getLocalizedMessage());
		exc.printStackTrace(System.out);
	    } finally {
		if (is != null) {
		    try {
			is.close();
		    } catch (IOException e) {
			System.out.println("Failed to close input: " + e.getLocalizedMessage());
		    }
		}
		if (os != null) {
		    try {
			os.close();
		    } catch (IOException e) {
			System.out.println("Failed to close output: " + e.getLocalizedMessage());
		    }
		}
	    }
	} else if (type == AbstractCodeJamBase.READER_TYPE) {
	    BufferedReader reader = null;
	    PrintWriter pw = null;
	    try {
		reader = new BufferedReader(new FileReader(input));
		pw = new PrintWriter(output);
		this.process(reader, pw);
	    } catch (FileNotFoundException e) {
		this.showUsage("FileNotFound: " + e.getLocalizedMessage());
	    } catch (IllegalArgumentException excIA) {
		this.showUsage(excIA.getLocalizedMessage());
	    } catch (Exception exc) {
		System.out.println("Program failed: " + exc.getLocalizedMessage());
		exc.printStackTrace(System.out);
	    } finally {
		if (reader != null) {
		    try {
			reader.close();
		    } catch (IOException e) {
			System.out.println("Failed to close input: " + e.getLocalizedMessage());
		    }
		}
		if (pw != null) {
		    pw.close();
		}
	    }
	} else if (type == AbstractCodeJamBase.FILE_TYPE) {
	    try {
		this.process(input, output);
	    } catch (IllegalArgumentException excIA) {
		this.showUsage(excIA.getLocalizedMessage());
	    } catch (Exception exc) {
		System.out.println("Program failed: " + exc.getLocalizedMessage());
		exc.printStackTrace(System.out);
	    }
	} else {
	    this.showUsage("Unknown type given: " + type + " (accepted values: 0,1)");
	}
	System.out.println("  READY (" + (System.currentTimeMillis() - starttime) + " ms)");
    }

    /**
     * Read a single number from input
     * 
     * @param reader
     * @param purpose
     *            What is the purpose of given data
     * @return
     * @throws IOException
     * @throws IllegalArgumentException
     */
    protected int readInt(BufferedReader reader, String purpose) throws IOException, IllegalArgumentException {
	int ret = 0;
	String line = reader.readLine();
	if (line == null) {
	    throw new IllegalArgumentException("Invalid input: line is empty, it should be an integer (" + purpose + ")!");
	}
	try {
	    ret = Integer.parseInt(line);
	} catch (NumberFormatException excNF) {
	    throw new IllegalArgumentException("Invalid input: the first line '" + line + "' should be an integer (" + purpose + ")!");
	}
	return ret;
    }

    /**
     * Read array of integers
     * 
     * @param reader
     * @param purpose
     * @return
     */
    protected int[] readIntArray(BufferedReader reader, String purpose) throws IOException {
	int[] ret = null;
	String line = reader.readLine();
	if (line == null) {
	    throw new IllegalArgumentException("Invalid input: line is empty, it should be an integer list (" + purpose + ")!");
	}
	String[] strArr = line.split("\\s");
	int len = strArr.length;
	ret = new int[len];
	for (int i = 0; i < len; i++) {
	    try {
		ret[i] = Integer.parseInt(strArr[i]);
	    } catch (NumberFormatException excNF) {
		throw new IllegalArgumentException("Invalid input: line '" + line + "' should be an integer list (" + purpose + ")!");
	    }
	}
	return ret;
    }

    /**
     * Read array of strings
     * 
     * @param reader
     * @param purpose
     * @return
     */
    protected String[] readStringArray(BufferedReader reader, String purpose) throws IOException {
	String[] ret = null;
	String line = reader.readLine();
	if (line == null) {
	    throw new IllegalArgumentException("Invalid input: line is empty, it should be a string list (" + purpose + ")!");
	}
	ret = line.split("\\s");
	return ret == null ? new String[0] : ret;
    }

    /**
     * Basic usage pattern. Can be overwritten by current implementation
     * 
     * @param message
     *            Short message, describing the problem with given program
     *            arguments
     */
    protected void showUsage(String message) {
	if (message != null) {
	    System.out.println(message);
	}
	System.out.println("Usage:");
	System.out.println("\t" + this.getClass().getName() + " program");
	System.out.println("\tArguments:");
	System.out.println("\t\t<input folder>:\tpath of input folder (default: " + AbstractCodeJamBase.DEFAULT_INPUT + ").");
	System.out.println("\t\t               \tAll files will be processed in the folder");
	System.out.println("\t\t<output folder>:\tpath of output folder (default: " + AbstractCodeJamBase.DEFAULT_OUTPUT + ")");
	System.out.println("\t\t               \tOutput file name will be the same as input");
	System.out.println("\t\t               \tinput with extension '.out'");
	System.exit(-1);
    }
}

/*
 * Abstract class that reads either the standard input, a named file, or prompts at the terminal.
 * Implement "process" for each CodeJam problem.
 * Reads input through a ReadWrapper, wrapping a BufferedReader.
 */

import java.io.*;
import java.util.StringTokenizer;
import java.text.*;

public abstract class CodeJammer {

	protected ReadWrapper reader;
	protected int caseNum = 1;
	
	//Processes one case
	public abstract void process() throws IOException;
	
	public void init() {
		//Do nothing unless overridden.
	}
	
	//Process all cases... usually just read the number of them and then run process on each.
	//Override if necessary.
	public void processAll() throws IOException {
		init();
		int numTrials = reader.readInt();
		for (int i=0; i<numTrials; i++) {
			process();
		}
	}
	
	public void output(String s) {
		if (s == null) System.out.println("Case #" + (caseNum++) + ":"); //no space
		else System.out.println("Case #" + (caseNum++) + ": " + s);
	}
	
	public void output(int n) {
		output(Integer.toString(n));
	}
	
	public void output(long n) {
		output(Long.toString(n));
	}
	
	//Prints a double with the specified number of digits after the decimal.
	public void output(double d, int digits) {
		String s = "0.";
		for (int i=0; i<digits; i++) s += "0";
		DecimalFormat f = new DecimalFormat(s);
		output(f.format(d));
	}
	
	public void output(double d) {
		output(Double.toString(d));
	}
	
	public void output(int[] array) {
		String s = "";
		for (int i=0; i<array.length; i++)
			s += " " + array[i];
		output(s.substring(1));
	}
	
	public void output(long[] array) {
		String s = "";
		for (int i=0; i<array.length; i++)
			s += " " + array[i];
		output(s.substring(1));
	}
	
	public void output(char[] array) {
		String s = "";
		for (int i=0; i<array.length; i++)
			s += " " + array[i];
		output(s.substring(1));
	}
	
	public void run(String[] args) {
		BufferedReader buff;
		if (args.length == 0) {
			buff = new BufferedReader(new InputStreamReader(System.in));
		} else {
			String filename = args[0];
			try {
				buff = new BufferedReader(new FileReader(filename));
			} catch (FileNotFoundException ex) {
				System.out.println("File not found.");
				return;
			}
		}
		reader = new ReadWrapper(buff);
		try {
			processAll();
		} catch (IOException ex) {
			System.out.println(ex.getMessage());
		}
	}
	
	public static class ReadWrapper {
		
		private BufferedReader in;
		
		public ReadWrapper(BufferedReader in) {
			this.in = in;
		}
		
		public String readString() throws IOException {
			return in.readLine();
		}
		
		public int readInt() throws IOException {
			String line = in.readLine();
			try {
				return Integer.parseInt(line);
			} catch (NumberFormatException ex) {
				throw (new IOException("ReadWrapper expected an int and read " + line));
			}
		}
		
		public int[] readArray() throws IOException {
			String line = in.readLine();
			try {
				StringTokenizer t = new StringTokenizer(line);
				int[] result = new int[t.countTokens()];
				for (int i=0; t.hasMoreTokens(); i++) {
					result[i] = Integer.parseInt(t.nextToken());
				}
				return result;
			} catch (NumberFormatException ex) {
				throw (new IOException("ReadWrapper expected an int array and read " + line));
			}
		}
		
		public long readLong() throws IOException {
			String line = in.readLine();
			try {
				return Long.parseLong(line);
			} catch (NumberFormatException ex) {
				throw (new IOException("ReadWrapper expected a long and read " + line));
			}
		}
		
		public long[] readLongArray() throws IOException {
			String line = in.readLine();
			try {
				StringTokenizer t = new StringTokenizer(line);
				long[] result = new long[t.countTokens()];
				for (int i=0; t.hasMoreTokens(); i++) {
					result[i] = Long.parseLong(t.nextToken());
				}
				return result;
			} catch (NumberFormatException ex) {
				throw (new IOException("ReadWrapper expected a long array and read " + line));
			}
		}
		
		public double readDouble() throws IOException {
			String line = in.readLine();
			try {
				return Double.parseDouble(line);
			} catch (NumberFormatException ex) {
				throw (new IOException("ReadWrapper expected a double and read " + line));
			}
		}
		
		public double[] readDoubleArray() throws IOException {
			String line = in.readLine();
			try {
				StringTokenizer t = new StringTokenizer(line);
				double[] result = new double[t.countTokens()];
				for (int i=0; t.hasMoreTokens(); i++) {
					result[i] = Double.parseDouble(t.nextToken());
				}
				return result;
			} catch (NumberFormatException ex) {
				throw (new IOException("ReadWrapper expected a double array and read " + line));
			}
		}
		
		public String[] readStringArray() throws IOException {
			String line = in.readLine();
			try {
				StringTokenizer t = new StringTokenizer(line);
				String[] result = new String[t.countTokens()];
				for (int i=0; t.hasMoreTokens(); i++) {
					result[i] = t.nextToken();
				}
				return result;
			} catch (NumberFormatException ex) {
				throw (new IOException("ReadWrapper expected a String array and read " + line));
			}
		}
		
		//Methods to read a single token at a time... for cases where input goes over multiple lines
		private StringTokenizer t = null;
		private String delims = null;
		private boolean returnDelims = false;
		
		public void setDelims(String delims, boolean returnThem) {
			this.delims = delims;
			returnDelims = returnThem;
		}
		
		public String getToken() throws IOException {
			while (t==null || !t.hasMoreTokens()) {
				if (delims == null) {
					t = new StringTokenizer(readString());
				} else {
					t = new StringTokenizer(readString(), delims, returnDelims);
				}
			}
			return t.nextToken();
		}
		
		public int getInt() throws IOException {
			String s = getToken();
			try {
				return Integer.parseInt(s);
			} catch (NumberFormatException e) {
				throw (new IOException("ReadWrapper expected an int and read " + s));
			}
		}
		
		public long getLong() throws IOException {
			String s = getToken();
			try {
				return Long.parseLong(s);
			} catch (NumberFormatException e) {
				throw (new IOException("ReadWrapper expected a long and read " + s));
			}
		}
		
		public double getDouble() throws IOException {
			String s = getToken();
			try {
				return Double.parseDouble(s);
			} catch (NumberFormatException e) {
				throw (new IOException("ReadWrapper expected a double and read " + s));
			}
		}
		
	}
	
}
