using System;
using System.Collections.Generic;
using log4net;
using TracingDB.Entities;

namespace TracingDB
{
	public class BatteryInfo
	{
        static readonly ILog log = LogManager.GetLogger(typeof(BatteryInfo));

        /// Constants
        public const string VitzrocellBatteryPartNr = "68118221";
        public const string TadiranBatteryPartNr = "68117469";

        public string PcbNumber;            /// Unique PCB number of the water meter
		public string BattSapPartNr;        /// Battery SAP part number
		public int BattBatchNr;             /// Batch number (purchase order)
		public string BattMMYY;             /// Production date
		public string BattSupplier;         /// Supplier
        public string PrintedBatteryInfo;   /// 'T', 'Vi' or '-'
        public DateTime TimeStamp;          /// Record creation time

        bool complete { get { return (PcbNumber != null) && (BattSapPartNr != null) && (BattBatchNr != 0) && (BattMMYY != null) && (BattSupplier != null); } }


		public BatteryInfo()
		{
            TimeStamp = DateTime.Now;
            PrintedBatteryInfo = "-";
		}


		/// <summary>
		/// Search MySQL DB and get battery info, add it into the record.
		/// </summary>
		/// <returns>true when successful</returns>
        public static BatteryInfo GetBatteryInfo(string pcbNumber, IList<Record> records)
		{
            if (string.IsNullOrEmpty(pcbNumber))
            {
                log.ErrorFormat("Invalid PcbBr, no battery info.");
                return null;
            }

            BatteryInfo info = new BatteryInfo() { PcbNumber = pcbNumber };

			try
			{
                bool error = false;

                foreach (var rec in records)
				{
                    if (rec.Part.CodeLocation == CodeLocation.OnPallet)
                    {
                        if (rec.Part.Name == VitzrocellBatteryPartNr)
                        {
                            if (info.BattSapPartNr != null) { error = true; break; }
                            info.BattSapPartNr = VitzrocellBatteryPartNr;
                            int battBatchNr;
                            info.BattBatchNr = int.TryParse(rec.Code, out battBatchNr) ? battBatchNr : 1;
                            info.BattSupplier = "VITZROCELL";
                        }
                        else if (rec.Part.Name == TadiranBatteryPartNr)
                        {
                            if (info.BattSapPartNr != null) { error = true; break; }
                            info.BattSapPartNr = TadiranBatteryPartNr;
                            int battBatchNr;
                            info.BattBatchNr = int.TryParse(rec.Code, out battBatchNr) ? battBatchNr : 1;
                            info.BattSupplier = "TADIRAN";
                        }
                    }

                    if (rec.Part.CodeType == CodeType.DateMMYY)
                    {
                        if (info.BattMMYY != null) { error = true; break; }
                        info.BattMMYY = rec.Code;
                    }
				}

                if (error || !info.complete)
				{
                    log.ErrorFormat("Battery info. for PcbNr={0} wasn't found in MySQL database", info.PcbNumber);
                    return null;
				}

                ///
                /// Set battery information printed on labels
                ///
                if (info.BattSupplier == "VITZROCELL")
                {
                    info.PrintedBatteryInfo = "Vi";
                }
                else if (info.BattSupplier == "TADIRAN")
                {
                    info.PrintedBatteryInfo = "T";
                }

                return info;
            }
			catch (Exception exc)
			{
				log.ErrorFormat("Battery info. for PcbNr={0} wasn't found in MySQL database: {1}",
                                info.PcbNumber, exc.Message);
                return null;
            }
		}


		public override string ToString()
		{
			return string.Format("PcbNr={0}, Battery={1}/{2}/{3}, Time={4}", PcbNumber, BattBatchNr, BattMMYY, BattSupplier, TimeStamp);
		}
	}
}