using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics;

namespace sharpknife.Utils
{
    class StringUtils
    {
        public static bool Contains(string text, string value)
        {
            if (string.IsNullOrEmpty(text) || string.IsNullOrEmpty(value))
            {
                return false;
            }

            return text.IndexOf(value, StringComparison.InvariantCultureIgnoreCase) >= 0;
        }

        public static int IndexOf(string text, string value)
        {
            if (string.IsNullOrEmpty(text))
            {
                return -1;
            }

            return text.IndexOf(value, StringComparison.InvariantCultureIgnoreCase);
        }

        public static string Left(string text, int index)
        {
            return text.Substring(0, index + 1);
        }

        public static string GetToken(string text, string format)
        {
            if (!Contains(format, "{}"))
            {
                return null;
            }

            string[] formatTokens = format.Split(new string[] { "{}" }, StringSplitOptions.None);

            string leftToken = formatTokens[0];
            string rightToken = formatTokens[1];

            text = text.Substring(text.IndexOf(leftToken) + leftToken.Length);
            text = text.Substring(0, text.Length - rightToken.Length);

            return text;
        }

        public static string[] GetTokens(string text, string format)
        {
            if (!Contains(format, "{}"))
            {
                return null;
            }

            string debug = text;

            string[] formatTokens = format.Split(new string[] { "{}" }, StringSplitOptions.None);

            string[] tokens = new string[formatTokens.Length - 1];

            for (int i = 0; i < tokens.Length; i++)
            {
                string firstToken = formatTokens[i];
                string nextToken = formatTokens[i + 1];

                text = text.Substring(IndexOf(text, firstToken) + firstToken.Length);

                int end = text.Length - (text.Length - IndexOf(text, nextToken));
                tokens[i] = text.Substring(0, end);
                if (i + 2 == formatTokens.Length && string.IsNullOrEmpty(nextToken))
                {
                    tokens[i] = text.Substring(0);
                }
                //else
                //{
                //    int end = text.Length - (text.Length - IndexOf(text, nextToken));
                //    tokens[i] = text.Substring(0, end);
                //}

                //tokens[i] = text.Substring(0, end);
                text = text.Substring(tokens[i].Length);
            }

            //string leftToken = formatTokens[0];
            //string rightToken = formatTokens[1];

            //text = text.Substring(text.IndexOf(leftToken) + leftToken.Length);
            //text = text.Substring(0, text.Length - rightToken.Length);

            return tokens;
        }

        public static string CleanUri(string uri)
        {
            string cleanUri = uri;

            if (StringUtils.Contains(uri, "https://"))
            {
                cleanUri = uri.Substring(8);
            }
            else if (StringUtils.Contains(uri, "http://"))
            {
                cleanUri = uri.Substring(7);
            }

            return cleanUri;
        }

        public static string RemoveNewLines(string text)
        {
            string temp = text;
            temp = temp.Replace("\r", string.Empty);
            temp = temp.Replace("\n", string.Empty);
            return temp;
        }

        public static string RemoveQuotes(string text)
        {
            string temp = text;
            temp = temp.Replace("\"", string.Empty);
            return temp;
        }

        public static string Decode1252(string text)
        {
            Encoding utf8 = Encoding.UTF8;
            Encoding windows1252 = Encoding.GetEncoding(1252);

            byte[] bytes = windows1252.GetBytes(text);
            string decodedText = utf8.GetString(Encoding.Convert(windows1252, utf8, bytes));

            return decodedText;
        }
    }
}