#if !UNITY_WINRT || UNITY_EDITOR || (UNITY_WP8 &&  !UNITY_WP_8_1)
#region License
// Copyright (c) 2007 James Newton-King
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
#endregion

using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
using System.Linq;
using System.Globalization;
#if(UNITY_IOS || UNITY_WEBGL || UNITY_IPHONE)
using Newtonsoft.Json.Aot;
#endif

namespace Newtonsoft.Json.Utilities
{
	internal static class StringUtils
	{
		public const string CarriageReturnLineFeed = "\r\n";
		public const string Empty = "";
		public const char CarriageReturn = '\r';
		public const char LineFeed = '\n';
		public const char Tab = '\t';

		public static string FormatWith(this string format, IFormatProvider provider, params object[] args)
		{
			ValidationUtils.ArgumentNotNull(format, "format");

			return string.Format(provider, format, args);
		}

		/// <summary>
		/// Determines whether the string contains white space.
		/// </summary>
		/// <param name="s">The string to test for white space.</param>
		/// <returns>
		/// 	<c>true</c> if the string contains white space; otherwise, <c>false</c>.
		/// </returns>
		public static bool ContainsWhiteSpace(string s)
		{
			if (s == null)
				throw new ArgumentNullException("s");

			for (int i = 0; i < s.Length; i++)
			{
				if (char.IsWhiteSpace(s[i]))
					return true;
			}
			return false;
		}

		/// <summary>
		/// Determines whether the string is all white space. Empty string will return false.
		/// </summary>
		/// <param name="s">The string to test whether it is all white space.</param>
		/// <returns>
		/// 	<c>true</c> if the string is all white space; otherwise, <c>false</c>.
		/// </returns>
		public static bool IsWhiteSpace(string s)
		{
			if (s == null)
				throw new ArgumentNullException("s");

			if (s.Length == 0)
				return false;

			for (int i = 0; i < s.Length; i++)
			{
				if (!char.IsWhiteSpace(s[i]))
					return false;
			}

			return true;
		}

		/// <summary>
		/// Ensures the target string ends with the specified string.
		/// </summary>
		/// <param name="target">The target.</param>
		/// <param name="value">The value.</param>
		/// <returns>The target string with the value string at the end.</returns>
		public static string EnsureEndsWith(string target, string value)
		{
			if (target == null)
				throw new ArgumentNullException("target");

			if (value == null)
				throw new ArgumentNullException("value");

			if (target.Length >= value.Length)
			{
				if (string.Compare(target, target.Length - value.Length, value, 0, value.Length, StringComparison.OrdinalIgnoreCase) ==
								0)
					return target;

				string trimmedString = target.TrimEnd(null);

				if (string.Compare(trimmedString, trimmedString.Length - value.Length, value, 0, value.Length,
								StringComparison.OrdinalIgnoreCase) == 0)
					return target;
			}

			return target + value;
		}

		public static bool IsNullOrEmptyOrWhiteSpace(string s)
		{
			if (string.IsNullOrEmpty(s))
				return true;
			else if (IsWhiteSpace(s))
				return true;
			else
				return false;
		}

		/// <summary>
		/// Perform an action if the string is not null or empty.
		/// </summary>
		/// <param name="value">The value.</param>
		/// <param name="action">The action to perform.</param>
		public static void IfNotNullOrEmpty(string value, Action<string> action)
		{
			IfNotNullOrEmpty(value, action, null);
		}

		private static void IfNotNullOrEmpty(string value, Action<string> trueAction, Action<string> falseAction)
		{
			if (!string.IsNullOrEmpty(value))
			{
				if (trueAction != null)
					trueAction(value);
			}
			else
			{
				if (falseAction != null)
					falseAction(value);
			}
		}

		/// <summary>
		/// Indents the specified string.
		/// </summary>
		/// <param name="s">The string to indent.</param>
		/// <param name="indentation">The number of characters to indent by.</param>
		/// <returns></returns>
		public static string Indent(string s, int indentation)
		{
			return Indent(s, indentation, ' ');
		}

		/// <summary>
		/// Indents the specified string.
		/// </summary>
		/// <param name="s">The string to indent.</param>
		/// <param name="indentation">The number of characters to indent by.</param>
		/// <param name="indentChar">The indent character.</param>
		/// <returns></returns>
		public static string Indent(string s, int indentation, char indentChar)
		{
			if (s == null)
				throw new ArgumentNullException("s");

			if (indentation <= 0)
				throw new ArgumentException("Must be greater than zero.", "indentation");

			StringReader sr = new StringReader(s);
			StringWriter sw = new StringWriter(CultureInfo.InvariantCulture);

			ActionTextReaderLine(sr, sw, delegate(TextWriter tw, string line)
			{
				tw.Write(new string(indentChar, indentation));
				tw.Write(line);
			});

			return sw.ToString();
		}

		private delegate void ActionLine(TextWriter textWriter, string line);

		private static void ActionTextReaderLine(TextReader textReader, TextWriter textWriter, ActionLine lineAction)
		{
			string line;
			bool firstLine = true;
			while ((line = textReader.ReadLine()) != null)
			{
				if (!firstLine)
					textWriter.WriteLine();
				else
					firstLine = false;

				lineAction(textWriter, line);
			}
		}

		/// <summary>
		/// Numbers the lines.
		/// </summary>
		/// <param name="s">The string to number.</param>
		/// <returns></returns>
		public static string NumberLines(string s)
		{
			if (s == null)
				throw new ArgumentNullException("s");

			StringReader sr = new StringReader(s);
			StringWriter sw = new StringWriter(CultureInfo.InvariantCulture);

			int lineNumber = 1;

			ActionTextReaderLine(sr, sw, delegate(TextWriter tw, string line)
			{
				tw.Write(lineNumber.ToString(CultureInfo.InvariantCulture).PadLeft(4));
				tw.Write(". ");
				tw.Write(line);

				lineNumber++;
			});

			return sw.ToString();
		}

		/// <summary>
		/// Nulls an empty string.
		/// </summary>
		/// <param name="s">The string.</param>
		/// <returns>Null if the string was null, otherwise the string unchanged.</returns>
		public static string NullEmptyString(string s)
		{
			return (string.IsNullOrEmpty(s)) ? null : s;
		}

		public static string ReplaceNewLines(string s, string replacement)
		{
			StringReader sr = new StringReader(s);
			StringBuilder sb = new StringBuilder();

			bool first = true;

			string line;
			while ((line = sr.ReadLine()) != null)
			{
				if (first)
					first = false;
				else
					sb.Append(replacement);

				sb.Append(line);
			}

			return sb.ToString();
		}

		public static string Truncate(string s, int maximumLength)
		{
			return Truncate(s, maximumLength, "...");
		}

		public static string Truncate(string s, int maximumLength, string suffix)
		{
			if (suffix == null)
				throw new ArgumentNullException("suffix");

			if (maximumLength <= 0)
				throw new ArgumentException("Maximum length must be greater than zero.", "maximumLength");

			int subStringLength = maximumLength - suffix.Length;

			if (subStringLength <= 0)
				throw new ArgumentException("Length of suffix string is greater or equal to maximumLength");

			if (s != null && s.Length > maximumLength)
			{
				string truncatedString = s.Substring(0, subStringLength);
				// incase the last character is a space
				truncatedString = truncatedString.Trim();
				truncatedString += suffix;

				return truncatedString;
			}
			else
			{
				return s;
			}
		}

		public static StringWriter CreateStringWriter(int capacity)
		{
			StringBuilder sb = new StringBuilder(capacity);
			StringWriter sw = new StringWriter(sb, CultureInfo.InvariantCulture);

			return sw;
		}

		public static int? GetLength(string value)
		{
			if (value == null)
				return null;
			else
				return value.Length;
		}

		public static string ToCharAsUnicode(char c)
		{
			char h1 = MathUtils.IntToHex((c >> 12) & '\x000f');
			char h2 = MathUtils.IntToHex((c >> 8) & '\x000f');
			char h3 = MathUtils.IntToHex((c >> 4) & '\x000f');
			char h4 = MathUtils.IntToHex(c & '\x000f');

			return new string(new[] { '\\', 'u', h1, h2, h3, h4 });
		}

		public static void WriteCharAsUnicode(TextWriter writer, char c)
		{
			ValidationUtils.ArgumentNotNull(writer, "writer");

			char h1 = MathUtils.IntToHex((c >> 12) & '\x000f');
			char h2 = MathUtils.IntToHex((c >> 8) & '\x000f');
			char h3 = MathUtils.IntToHex((c >> 4) & '\x000f');
			char h4 = MathUtils.IntToHex(c & '\x000f');

			writer.Write('\\');
			writer.Write('u');
			writer.Write(h1);
			writer.Write(h2);
			writer.Write(h3);
			writer.Write(h4);
		}

		public static TSource ForgivingCaseSensitiveFind<TSource>(this IEnumerable<TSource> source, Func<TSource, string> valueSelector, string testValue)
		{
			if (source == null)
				throw new ArgumentNullException("source");
			if (valueSelector == null)
				throw new ArgumentNullException("valueSelector");

#if !(UNITY_IPHONE || UNITY_IOS || UNITY_WEBGL) || (UNITY_IOS || UNITY_WEBGL && !(UNITY_3_5 || UNITY_4_0_1 || UNITY_4_1 || UNITY_4_2 || UNITY_4_3))
			var caseInsensitiveResults = source.Where(s => string.Compare(valueSelector(s), testValue, StringComparison.OrdinalIgnoreCase) == 0).ToArray();
			var resultCount = caseInsensitiveResults.Length;
#else
			var caseInsensitiveResults = new List<TSource>();
			source.ForEach(itm =>
							{
								if (string.Compare(valueSelector(itm), testValue, StringComparison.OrdinalIgnoreCase) == 0)
									caseInsensitiveResults.Add(itm);
							});
			var resultCount = caseInsensitiveResults.Count;
#endif

			if (resultCount <= 1)
			{
				return resultCount == 1 ? caseInsensitiveResults[0] : default(TSource);					
			}
			else
			{
				//multiple results returned. now filter using case sensitivity
#if !(UNITY_IPHONE || UNITY_IOS || UNITY_WEBGL) || (UNITY_IOS || UNITY_WEBGL && !(UNITY_3_5 || UNITY_4_0_1 || UNITY_4_1 || UNITY_4_2 || UNITY_4_3))

				var caseSensitiveResults = source.Where(s => string.Compare(valueSelector(s), testValue, StringComparison.Ordinal) == 0);
				return caseSensitiveResults.SingleOrDefault();
#else
				var caseSensitiveResults = new List<TSource>();
        source.ForEach(itm =>
                       {
                           if (string.Compare(valueSelector(itm), testValue, StringComparison.Ordinal) == 0)
                               caseSensitiveResults.Add(itm);
                       });

        return caseSensitiveResults.Count > 0 ? caseSensitiveResults[0] : default(TSource);
#endif
			}
		}

		public static string ToCamelCase(string s)
		{
			if (string.IsNullOrEmpty(s))
				return s;

			if (!char.IsUpper(s[0]))
				return s;

			string camelCase = char.ToLower(s[0], CultureInfo.InvariantCulture).ToString(CultureInfo.InvariantCulture);
			if (s.Length > 1)
				camelCase += s.Substring(1);

			return camelCase;
		}
	}
}
#endif