using System;
using System.Collections.Generic;
using System.Globalization;
using ServiceStack.IO;
using ServiceStack.Text;

namespace ServiceStack.Script
{
    public static class ScriptConfig
    {
        /// <summary>
        /// Rethrow fatal exceptions thrown on incorrect API usage    
        /// </summary>
        public static HashSet<Type> FatalExceptions { get; set; } = new HashSet<Type>
        {
            typeof(NotSupportedException),
            typeof(NotImplementedException),
            typeof(StackOverflowException),
        };
        
        public static HashSet<Type> CaptureAndEvaluateExceptionsToNull { get; set; } = new HashSet<Type>
        {
            typeof(NullReferenceException),
            typeof(ArgumentNullException),
        };
        public static CultureInfo DefaultCulture { get; set; } //Uses CurrentCulture by default
        public static string DefaultDateFormat { get; set; }  = "yyyy-MM-dd";
        public static string DefaultDateTimeFormat { get; set; } = "u";
        public static string DefaultTimeFormat { get; set; } = @"h\:mm\:ss";
        public static TimeSpan DefaultFileCacheExpiry { get; set; } =TimeSpan.FromMinutes(1);
        public static TimeSpan DefaultUrlCacheExpiry { get; set; } =TimeSpan.FromMinutes(1);
        public static string DefaultIndent { get; set; } = "\t";
        public static string DefaultNewLine { get; set; } = Environment.NewLine;
        public static string DefaultJsConfig { get; set; } = "excludetypeinfo";
        public static StringComparison DefaultStringComparison { get; set; } = StringComparison.Ordinal;
        public static string DefaultTableClassName { get; set; } = "table";
        public static string DefaultErrorClassName { get; set; } = "alert alert-danger";
        public static bool AllowUnixPipeSyntax { get; set; } = true;
        public static bool AllowAssignmentExpressions { get; set; } = true;
        public static ParseRealNumber ParseRealNumber = numLiteral => numLiteral.ParseDouble();

        public static CultureInfo CreateCulture()
        {
            var culture = DefaultCulture;
            if (culture == null)
            {
                culture = CultureInfo.CurrentCulture;
            }
            if (Equals(culture, CultureInfo.InvariantCulture))
            {
                culture = (CultureInfo) culture.Clone();
                culture.NumberFormat.CurrencySymbol = "$";
            }
            return culture;
        }
    }

    public delegate object ParseRealNumber(ReadOnlySpan<char> numLiteral);
}