using System;

namespace Wayne.ForecourtControl
{

    /// <summary>
    /// Price group stucture. Contains an underlying int between 0 and 11.
    /// </summary>

    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1815:OverrideEqualsAndOperatorEqualsOnValueTypes")]
    public struct PriceGroup
    {
        #region Fields

        int value;

        #endregion

        #region Construction
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Globalization", "CA1303:DoNotPassLiteralsAsLocalizedParameters", MessageId = "System.ArgumentException.#ctor(System.String)")]
        private PriceGroup(int newValue, bool forceValue)
        {
            if ((newValue >= MinValue) && (newValue <= MaxValue) || forceValue)
            {
                value = newValue;
            }
            else
                throw new ArgumentException(
                    "Price group must be within the bounds " +
                    MinValue.ToString(System.Globalization.CultureInfo.InvariantCulture) +
                    "-" +
                    MaxValue.ToString(System.Globalization.CultureInfo.InvariantCulture
                    ));
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="newValue"></param>
        public PriceGroup(int newValue)
            : this(newValue, false)
        {
        }

        #endregion

        #region Methods
        /// <summary>
        /// Equality comparer.
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>

        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2231:OverloadOperatorEqualsOnOverridingValueTypeEquals")]
        public override bool Equals(object obj)
        {
            if (obj is PriceGroup)
                return (int)((PriceGroup)obj) == this.value;
            else
                return false;
        }

        /// <summary>
        /// Hash Code generator.
        /// </summary>
        /// <returns></returns>
        public override int GetHashCode()
        {
            return value.GetHashCode();
        }        
        
        #endregion

        #region Debug methods

        /// <summary>
        /// Presents the class as a string.
        /// </summary>
        /// <returns></returns>
        public string ToString(string format, IFormatProvider provider)
        {
            string extraText = " ";

            switch (value)
            {
                case -1: extraText = " Unknown"; break;
                case 0: extraText = " FullService"; break;
                case 1: extraText = " PayInKiosk"; break;
                case 2: extraText = " OptCard"; break;
                case 3: extraText = " OptCash"; break;
            }
            return value.ToString(format, provider) + extraText;
        }

        /// <summary>
        /// Presents the class as a string using the specified culture-specific format information.
        /// </summary>
        /// <returns></returns>
        public string ToString(IFormatProvider provider)
        {
            return ToString("", provider);
        }

        /// <summary>
        /// Presents the class as a string using a format string.
        /// </summary>
        /// <returns></returns>
        public string ToString(string format)
        {
            return ToString(format, System.Globalization.CultureInfo.InvariantCulture);
        }

        /// <summary>
        /// Presents the class as a string using a format string and the specified culture-specific format information.
        /// </summary>
        /// <returns></returns>
        public override string ToString()
        {
            return ToString("", System.Globalization.CultureInfo.InvariantCulture);
        }

        #endregion

        #region Conversions

        /// <summary>
        /// 
        /// </summary>
        /// <param name="thePriceGroup"></param>
        /// <returns></returns>
        public static implicit operator int(PriceGroup thePriceGroup)
        {
            return thePriceGroup.value;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="priceGroupId"></param>
        /// <returns></returns>
        public static implicit operator PriceGroup(int priceGroupId)
        {
            return new PriceGroup(priceGroupId);
        }
        #endregion

        #region Public constants
        /// <summary>
        /// 
        /// </summary>
        public const int MinValue = 0;
        /// <summary>
        /// 
        /// </summary>
        public const int MaxValue = 11;

        /// <summary>
        /// 
        /// </summary>
        public static readonly PriceGroup FullService = 0;

        /// <summary>
        /// 
        /// </summary>
        public static readonly PriceGroup PayInKiosk = 1;

        /// <summary>
        /// 
        /// </summary>
        public static readonly PriceGroup OptCash = 2;

        /// <summary>
        /// 
        /// </summary>
        public static readonly PriceGroup OptCard = 3;

        /// <summary>
        /// 
        /// </summary>
        public static readonly PriceGroup Unknown = new PriceGroup(-1, true);
        #endregion
    }
}