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

namespace VeederRoot_ATG_Console.MessageEntity.Incoming
{
    /// <summary>
    /// i|I602
    /// </summary>
    public class QueryOrSetTankProductLabelResponse : IncomingMessageBase
    {
        public DateTime? CurrentDateAndTime
        {
            get
            {
                if (base.FunctionCode.Item1 == MessageFormat.Display)
                    return null;
                return DateTime.ParseExact(
                    Encoding.ASCII.GetString(base.DataFieldAndOptionalCheckSumAndETX.Take(10).ToArray()),
                    "yyMMddHHmm", CultureInfo.InvariantCulture);
            }
        }

        public int? TankNumberInFunctionCode
        {
            get
            {
                if (base.FunctionCode.Item1 == MessageFormat.Display)
                    return null;
                var r = int.Parse(base.FunctionCode.Item3);
                return r;
            }
        }

        /// <summary>
        /// Get pairs of TankNumber:ProductLabel
        /// </summary>
        public IEnumerable<Tuple<int, string>> ProductLabels
        {
            get
            {
                if (base.FunctionCode.Item1 == MessageFormat.Display)
                    return null;
                var result = new List<Tuple<int, string>>();
                int elapsed = 10;
                while (true)
                {
                    if (base.DataFieldAndOptionalCheckSumAndETX.Skip(elapsed).Count() < 22) break;
                    var target = base.DataFieldAndOptionalCheckSumAndETX.Skip(elapsed).Take(22).ToArray();
                    var tankNumber = int.Parse(Encoding.ASCII.GetString(target.Take(2).ToArray()));
                    var label = Encoding.ASCII.GetString(target.Skip(2).Take(20).ToArray());
                    elapsed += 22;
                    result.Add(new Tuple<int, string>(tankNumber, label));
                }

                return result;
            }
        }

        public override string ToLogString()
        {
            if (base.FunctionCode.Item1 == MessageFormat.Display)
                return Encoding.ASCII.GetString(base.DataFieldAndOptionalCheckSumAndETX.ToArray());
            return "Current DateTime: " + this.CurrentDateAndTime.Value.ToString("yyyy-MM-dd HH:mm")
                + ", TankNumberInFunctionCode: " + this.TankNumberInFunctionCode.Value
                + " with ProductLabel list(tankNumber:ProductLabel)-> "
                + (this.ProductLabels != null && this.ProductLabels.Any() ?
                    this.ProductLabels.Select(p => p.Item1 + ":" + p.Item2).Aggregate((acc, n) => acc + ", " + n)
                    : "");
        }
    }
}