// CString2.cs

// http://svc.luckstar.com.tw/CodeHelper/cs/index.html
// 2017-04-23, honda@luckstar.com.tw, CodeHelper, Create from Luckstar lib.

// KeyWord: IComparable, CompareTo, SortedList<TKey, TValue>, Dictionary<TKey, TValue>, IEquatable
// Related: CString2, CSortedList, CDictionary.

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

namespace ConsoleBase
{
    public class CString2 : IComparable, IEquatable<CString2>
    {
        // 1. SortedList<TKey, TValue>().ContainKey() 會用到 IComparable.
        // 2. Dictionary<TKey, TValue>().ContainKey() 會用到 IEquatable. (List<T>().Contains()...等也會用到)
        // 3. 實作 IEquatable的話, 就要實作(Equals(), GetHashCode(), operator == 及 != ).
        public string ms1 { get; set; }
        public string ms2 { get; set; }
        public CString2()
        {
            Clear();
        }
        public CString2(string s1, string s2)
        {
            ms1 = s1;
            ms2 = s2;
        }
        public void Clear()
        {
            ms1 = string.Empty;
            ms2 = string.Empty;
        }
        public int CompareTo(object obj)
        {
            if (obj == null) return 1;
            CString2 o2 = obj as CString2;
            if (o2 == null) throw new ArgumentException("Object is not a CString2");

            if (ms1.CompareTo(o2.ms1) == 0)
                return ms2.CompareTo(o2.ms2);
            else
                return ms1.CompareTo(o2.ms1);
        }
        public string ToString(string sDelimiter)
        {
            return String.Format("{0}{1}{2}", ms1, sDelimiter, ms2);
        }
        public override string ToString()
        {
            //return base.ToString();
            return ToString(",");
        }

        public bool Equals(CString2 other)
        {
            if (other == null) return false;
            if (ms1 != other.ms1) return false;
            if (ms2 != other.ms2) return false;
            return true;
        }
        public override bool Equals(object obj)
        {
            if (obj == null) return false;
            CString2 o2 = obj as CString2;
            if (o2 == null) return false;
            return Equals(o2);
        }
        public override int GetHashCode()
        {
            //return base.GetHashCode();
            return this.ToString().GetHashCode();
        }
        public static bool operator == (CString2 o1, CString2 o2)
        {
            if ((object)o1 == null || ((object)o2) == null)
                return Object.Equals(o1, o2);
            return o1.Equals(o2);
        }
        public static bool operator !=(CString2 o1, CString2 o2)
        {
            if (o1 == null || o2 == null)
                return !Object.Equals(o1, o2);
            return !(o1.Equals(o2));
        }

    }
}