package org.apache.cordova.USBPrinter;

import java.io.IOException;
import java.io.StreamTokenizer;
import java.io.StringReader;
import java.nio.ByteBuffer;

public class EscposUtil {

	public static enum ASCII_CONTROL_CODE {
		NUL(0), SOH(1), STX(2), ETX(3), EOT(4), ENQ(5), ACK(6), BEL(7), BS(8), HT(9), LF(10), VT(11), FF(12), CR(13), SO(14), SI(15), DLE(16), DC1(17), DC2(18), DC3(19), DC4(20), NAK(21), SYN(22), ETB(
				23), CAN(24), EM(25), SUB(26), ESC(27), FS(28), GS(29), RS(30), US(31);

		private final int value;

		private ASCII_CONTROL_CODE(int value) {
			this.value = value;
		}

		public byte getASCIIValue() {
			return (byte) this.value;
		}
	}

	public static byte[] convertEscposToBinary(String escpos) {
		int value = -1;

		StringReader r = new StringReader(escpos);
		StreamTokenizer st = new StreamTokenizer(r);
		st.resetSyntax();
		st.slashSlashComments(false);
		st.slashStarComments(false);
		st.whitespaceChars(0, 32);
		st.wordChars(33, 255);
		st.quoteChar(34);
		st.quoteChar(39);
		st.eolIsSignificant(true);

		ByteBuffer bb = ByteBuffer.allocate(2048);

		try {
			while (st.nextToken() != -1) {
				switch (st.ttype) {
				case -3:
					String s = st.sval;
					value = -1;

					if ((s.length() == 1) && (!Character.isDigit(s.charAt(0)))) {
						byte[] bytes = s.getBytes();
						value = bytes[0];
					} else if ((s.length() > 2) && (s.substring(0, 2) == "0x")) {
						value = Integer.parseInt(s.substring(2), 16);
					} else if (isInteger(s)) {
						value = Integer.parseInt(s);
					} else if (s.contentEquals("NUL")) {
						value = ASCII_CONTROL_CODE.NUL.getASCIIValue();
					} else if (s.contentEquals("SOH")) {
						value = ASCII_CONTROL_CODE.SOH.getASCIIValue();
					} else if (s.contentEquals("STX")) {
						value = ASCII_CONTROL_CODE.STX.getASCIIValue();
					} else if (s.contentEquals("ETX")) {
						value = ASCII_CONTROL_CODE.ETX.getASCIIValue();
					} else if (s.contentEquals("EOT")) {
						value = ASCII_CONTROL_CODE.EOT.getASCIIValue();
					} else if (s.contentEquals("ENQ")) {
						value = ASCII_CONTROL_CODE.ENQ.getASCIIValue();
					} else if (s.contentEquals("ACK")) {
						value = ASCII_CONTROL_CODE.ACK.getASCIIValue();
					} else if (s.contentEquals("BEL")) {
						value = ASCII_CONTROL_CODE.BEL.getASCIIValue();
					} else if (s.contentEquals("BS")) {
						value = ASCII_CONTROL_CODE.BS.getASCIIValue();
					} else if (s.contentEquals("HT")) {
						value = ASCII_CONTROL_CODE.HT.getASCIIValue();
					} else if (s.contentEquals("LF")) {
						value = ASCII_CONTROL_CODE.LF.getASCIIValue();
					} else if (s.contentEquals("VT")) {
						value = ASCII_CONTROL_CODE.VT.getASCIIValue();
					} else if (s.contentEquals("FF")) {
						value = ASCII_CONTROL_CODE.FF.getASCIIValue();
					} else if (s.contentEquals("CR")) {
						value = ASCII_CONTROL_CODE.CR.getASCIIValue();
					} else if (s.contentEquals("SO")) {
						value = ASCII_CONTROL_CODE.SO.getASCIIValue();
					} else if (s.contentEquals("SI")) {
						value = ASCII_CONTROL_CODE.SI.getASCIIValue();
					} else if (s.contentEquals("DLE")) {
						value = ASCII_CONTROL_CODE.DLE.getASCIIValue();
					} else if (s.contentEquals("DC1")) {
						value = ASCII_CONTROL_CODE.DC1.getASCIIValue();
					} else if (s.contentEquals("DC2")) {
						value = ASCII_CONTROL_CODE.DC2.getASCIIValue();
					} else if (s.contentEquals("DC3")) {
						value = ASCII_CONTROL_CODE.DC3.getASCIIValue();
					} else if (s.contentEquals("DC4")) {
						value = ASCII_CONTROL_CODE.DC4.getASCIIValue();
					} else if (s.contentEquals("NAK")) {
						value = ASCII_CONTROL_CODE.NAK.getASCIIValue();
					} else if (s.contentEquals("SYN")) {
						value = ASCII_CONTROL_CODE.SYN.getASCIIValue();
					} else if (s.contentEquals("ETB")) {
						value = ASCII_CONTROL_CODE.ETB.getASCIIValue();
					} else if (s.contentEquals("CAN")) {
						value = ASCII_CONTROL_CODE.CAN.getASCIIValue();
					} else if (s.contentEquals("EM")) {
						value = ASCII_CONTROL_CODE.EM.getASCIIValue();
					} else if (s.contentEquals("SUB")) {
						value = ASCII_CONTROL_CODE.SUB.getASCIIValue();
					} else if (s.contentEquals("ESC")) {
						value = ASCII_CONTROL_CODE.ESC.getASCIIValue();
					} else if (s.contentEquals("FS")) {
						value = ASCII_CONTROL_CODE.FS.getASCIIValue();
					} else if (s.contentEquals("GS")) {
						value = ASCII_CONTROL_CODE.GS.getASCIIValue();
					} else if (s.contentEquals("RS")) {
						value = ASCII_CONTROL_CODE.RS.getASCIIValue();
					} else if (s.contentEquals("US")) {
						value = ASCII_CONTROL_CODE.US.getASCIIValue();
					}

					if (value != -1) {
						bb.put((byte) value);
					}
					break;
				case 34:
				case 39:
					bb.put(st.sval.getBytes("GB2312"));
				}

			}
		} catch (NumberFormatException localNumberFormatException) {
		} catch (IOException e) {
		}

		byte[] result = null;
		int size = bb.position();
		if (size > 0) {
			result = new byte[size];
			bb.flip();
			bb.get(result);
		}

		return result;
	}

	public static boolean isInteger(String input) {
		try {
			Integer.parseInt(input);
			return true;
		} catch (Exception e) {
		}

		return false;
	}
}