using System;
using System.Collections.Generic;
using System.Xml;
using System.Text;

namespace RolePlayingGameData
{
    /// <summary>
    /// Extends NET framework classes with the methods missing on XBox
    /// Implements only basic functionality of those methods
    /// </summary>
    public static class MissingMethods
    {
        /// <summary>
        /// Implements List.RemoveAll(Predicate match) method
        /// </summary>
        public static int RemoveAll<T>(this List<T> that, Predicate<T> match)
        {
            int count = that.Count;
            List<T> res = new List<T>(that.Count);
            foreach (var item in that)
            {
                if (match(item) == false)
                {
                    res.Add(item);
                }
            }
            that.Clear();
            that.AddRange(res);
            return that.Count - count;
        }

        /// <summary>
        /// Implements List.Find(Predicate match) method
        /// </summary>
        public static T Find<T>(this List<T> that, Predicate<T> match)
        {
            foreach (var item in that)
            {
                if (match(item) == true)
                {
                    return item;
                }
            }
            return default(T);
        }

        /// <summary>
        /// Implements List.Exists(Predicate match) method
        /// </summary>
        public static bool Exists<T>(this List<T> that, Predicate<T> match)
        {
            foreach (var item in that)
            {
                if (match(item) == true)
                {
                    return true;
                }
            }
            return false;
        }

        /// <summary>
        /// Implements List.TrueForAll(Predicate match) method
        /// </summary>
        public static bool TrueForAll<T>(this List<T> that, Predicate<T> match)
        {
            foreach (var item in that)
            {
                if (match(item) == false)
                {
                    return false;
                }
            }
            return true;
        }

        /// <summary>
        /// Implements List.FindIndex(Predicate match) method
        /// </summary>
        public static int FindIndex<T>(this List<T> that, Predicate<T> match)
        {
            for (int i = 0; i < that.Count; i++)
            {
                if (match(that[i]) == true)
                {
                    return i;
                }
            }
            return -1;
        }

        /// <summary>
        /// Implements XmlReader.ReadElementString(string name) method
        /// </summary>
        public static string ReadElementString(this XmlReader that, string name)
        {
            return that.ReadElementContentAsString();
        }


    }
}