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package com.clickntap.utils;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;

public class AsciiUtils {
  private static final String ENCODE_PRE = "&#";
  private static final String ENCODE_POST = ";";

  public static String limit(String text, int limit) {
    return text != null ? text.substring(0, Math.min(text.length(), limit)) + (text.length() > limit ? "..." : ConstUtils.EMPTY) : ConstUtils.EMPTY;
  }

  public static String utf7ToText(String text) {
    if (text != null)
      text = text.replace(" ", " ");
    int x0, x1, x2, code;
    while ((x0 = text.indexOf(ENCODE_PRE)) >= 0) {
      x2 = x1 = x0 + ENCODE_PRE.length();
      while (Character.isDigit(text.charAt(x2)))
        x2++;
      code = Integer.parseInt(text.substring(x1, x2));
      text = new StringBuffer(text.substring(0, x0)).append((char) code).append(text.substring(x2 + ENCODE_POST.length())).toString();
    }
    return text;
  }

  public static String textToUtf7(String text) {
    return textToUtf7(text.toCharArray());
  }

  public static String textToUtf7(char[] text) {
    StringBuffer sb = new StringBuffer();
    for (int i = 0; i < text.length; i++)
      if (text[i] > 127)
        sb.append(ENCODE_PRE).append((int) text[i]).append(ENCODE_POST);
      else
        sb.append(text[i]);
    return sb.toString();
  }

  public static void binaryToText(String fileName1, String fileName2) throws IOException {
    File file1 = new File(fileName1);
    File file2 = new File(fileName2);
    AsciiUtils.binaryToText(file1, file2);
  }

  public static void binaryToText(File file1, File file2) throws FileNotFoundException, IOException {
    InputStream in = new FileInputStream(file1);
    OutputStreamWriter out = new FileWriter(file2);
    AsciiUtils.binaryToText(in, out);
  }

  /*
   * public static String toBinary(String in) throws IOException { StringInputStream input = new StringInputStream(in); ByteArrayOutputStream output = new ByteArrayOutputStream(); textToBinary(input, output); return output.toString(); }
   * 
   * public static String toText(String in) throws IOException { StringInputStream input = new StringInputStream(in); StringWriter output = new StringWriter(); binaryToText(input, output); return output.toString(); }
   */
  public static void binaryToText(InputStream in, Writer out) throws IOException {
    int i;
    String hex;
    while ((i = in.read()) != -1) {
      hex = Integer.toHexString(i);
      if (hex.length() == 1)
        out.write('0');
      out.write(hex);
    }
    in.close();
    out.close();
  }

  public static void textToBinary(String fileName1, String fileName2) throws IOException {
    File file1 = new File(fileName1);
    File file2 = new File(fileName2);
    AsciiUtils.textToBinary(file1, file2);
  }

  public static void textToBinary(File file1, File file2) throws FileNotFoundException, IOException {
    InputStream in = new FileInputStream(file1);
    OutputStream out = new FileOutputStream(file2);
    AsciiUtils.textToBinary(in, out);
  }

  public static void textToBinary(InputStream in, OutputStream out) throws IOException {
    byte[] c = new byte[2];
    while (in.read(c, 0, 2) != -1)
      out.write(AsciiUtils.bytesToInt(c));
    in.close();
    out.close();
  }

  public static int bytesToInt(byte[] b) {
    return AsciiUtils.byteToInt(b[0]) * 16 + AsciiUtils.byteToInt(b[1]);
  }

  public static int byteToInt(byte b) {
    switch (b) {
    case '0':
      return 0;
    case '1':
      return 1;
    case '2':
      return 2;
    case '3':
      return 3;
    case '4':
      return 4;
    case '5':
      return 5;
    case '6':
      return 6;
    case '7':
      return 7;
    case '8':
      return 8;
    case '9':
      return 9;
    case 'a':
      return 10;
    case 'b':
      return 11;
    case 'c':
      return 12;
    case 'd':
      return 13;
    case 'e':
      return 14;
    case 'f':
      return 15;
    default:
      return -1;
    }
  }

  public static String webize(String text) {
    return webize(text.toLowerCase().toCharArray());
  }

  public static String webize(char[] text) {
    StringBuffer sb = new StringBuffer();
    for (int i = 0; i < text.length; i++)
      if ((text[i] >= 'a' && text[i] <= 'z') || (text[i] >= '0' && text[i] <= '9') || text[i] == '-' || text[i] == '_' || text[i] == '.')
        sb.append(text[i]);
    return sb.toString().toLowerCase();
  }

  public static String phonize(String text) {
    return phonize(text.toLowerCase().toCharArray());
  }

  public static String phonize(char[] text) {
    StringBuffer sb = new StringBuffer();
    for (int i = 0; i < text.length; i++)
      if ((text[i] >= '0' && text[i] <= '9') || text[i] == '+')
        sb.append(text[i]);
    return sb.toString().toLowerCase();
  }

  public static boolean isWebized(String text) {
    if (text == null)
      return false;
    return text.toLowerCase().equals(webize(text));
  }
}