using System;
using System.Collections.Generic;
using System.Text.RegularExpressions;

namespace BFR.Helpers
{
    public static class IListExtensions
    {
        public static void ReplaceAll<T>(this IList<T> list, IEnumerable<T> replacement)
        {
            list.Clear();
            foreach (var t in replacement)
                list.Add(t);
        }
    }

    public static class StringExtensions
    {
        public static string Replace(this string input, string pattern, string replacement, bool useRegex = false, bool useRegexReplace = false) =>
            Regex.Replace(input,
                useRegex ? pattern : Regex.Escape(pattern),
                useRegexReplace ? replacement : replacement.Replace("$", "$$"));

        public static bool RegexContains(this string input, string pattern)
        {
            try { return Regex.IsMatch(input, pattern); }
            catch(Exception) { return false; }
        }
    }

    public static class EnumExtensions
    {
        public static T GetAttribute<T>(this Enum enumVal) where T : Attribute
        {
            var type = enumVal.GetType();
            var memInfo = type.GetMember(enumVal.ToString());
            var attributes = memInfo[0].GetCustomAttributes(typeof(T), false);
            return (attributes.Length > 0) ? (T)attributes[0] : null;
        }
    }
}