package jp.kshoji;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

public class TextToKeyCode {
  private static final String keyCodeShiftTable = "~!@#$%^&*()_+{}|:\"<>?";
	private static final String keyCodeTable = "`1234567890-=[]\\;',./";
	private static final int KEY_SHIFT = 2;

	private static String readFileToString(File file) throws IOException {
		byte[] byteArray = new byte[(int) file.length()];
		FileInputStream fis = new FileInputStream(file);
		fis.read(byteArray);
		fis.close();
		
		return new String(byteArray);
	}

	public static void main(String[] args) throws IOException {
		String toKeyCode = readFileToString(new File("totas.txt"));
		int indexOfCharAt;
		ByteArrayOutputStream output = new ByteArrayOutputStream();

		for (int i = 0; i < toKeyCode.length(); i++) {
			byte byte1;
			byte byte2 = 0;
			
			char charAt = toKeyCode.charAt(i);
			if (charAt >= '0' && charAt <= '9') {
				byte1 = (byte) charAt;
			} else if (charAt >= 'a' && charAt <= 'z') {
				byte1 = (byte) charAt;
			} else if (charAt >= 'A' && charAt <= 'Z') {
				byte1 = (byte) (charAt - 'A' + 'a');
				byte2 = KEY_SHIFT;
			} else if ((indexOfCharAt = keyCodeShiftTable.indexOf(charAt)) != -1) {
				byte1 = (byte) keyCodeTable.charAt(indexOfCharAt);
				byte2 = KEY_SHIFT;
			} else if ((indexOfCharAt = keyCodeTable.indexOf(charAt)) != -1) {
				byte1 = (byte) charAt;
			} else if (charAt == '\n' || charAt == ' ' || charAt == '\t') {
				byte1 = (byte) charAt;
			} else {
				continue;
			}
			
			output.write(new byte[]{byte1, byte2});
		}
		
		FileOutputStream fos = new FileOutputStream(new File("tas.txt"));
		fos.write(output.toByteArray());
		fos.flush();
		fos.close();
	}
}