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package com.clickntap.utils;

import java.io.*;

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));
    }
}