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

namespace DTS.SensorDB.TSF
{
    /// <summary>
    /// handles the rack information section of the TSF
    /// </summary>
    public class TSFRackInformationSection
    {
        private const string START_SECTION_HEADER = "---- Start Rack Information ----";
        private const string COLUMN_HEADER = "Rack";
        private const string END_SECTION_HEADER = "---- End Rack Information ----";
        private List<TSFRackDescription> _racks = new List<TSFRackDescription>();
        public TSFRackDescription[] Racks
        {
            get { return _racks.ToArray(); }
            set { _racks = new List<TSFRackDescription>(value); }
        }
        public TSFRackInformationSection() { }
        /// <summary>
        /// reads the section from the TSF assumes currentline is the start of the section
        /// </summary>
        /// <param name="lines"></param>
        /// <param name="currentLine"></param>
        /// <param name="errors"></param>
        /// <param name="tsf"></param>
        /// <param name="system"></param>
        public void ReadFrom(List<string> lines, ref int currentLine, ref List<ReadTSFError> errors, TSFFile tsf, TSFSystemDescription system)
        {
            var invariant = System.Globalization.CultureInfo.InvariantCulture;
            _racks.Clear();
            if (currentLine == lines.Count)
            {
                errors.Add(new ReadTSFError(ReadTSFError.TSF_ERRORS.TSF_UNEXPECTED_EOF, currentLine));
                return;
            }
            string startSection = lines[currentLine++];
            if (startSection != START_SECTION_HEADER)
            {
                errors.Add(new ReadTSFError(ReadTSFError.TSF_ERRORS.RACKINFORMATIONSECTION_INVALIDHEADER, currentLine, startSection));
                return;
            }

            if (currentLine == lines.Count)
            {
                errors.Add(new ReadTSFError(ReadTSFError.TSF_ERRORS.TSF_UNEXPECTED_EOF, currentLine));
                return;
            }

            string columnHeader = lines[currentLine++];
            if (false == columnHeader.Contains(COLUMN_HEADER))
            {
                errors.Add(new ReadTSFError(ReadTSFError.TSF_ERRORS.RACKINFORMATIONSECTION_INVALIDCOLUMNHEADER, currentLine, columnHeader));
                return;
            }

            bool done = false;
            while (!done)
            {
                if (currentLine == lines.Count)
                {
                    errors.Add(new ReadTSFError(ReadTSFError.TSF_ERRORS.TSF_UNEXPECTED_EOF, currentLine));
                    return;
                }

                string line = lines[currentLine++];
                if (line != END_SECTION_HEADER)
                {
                    string[] tokens = line.Split(new char[] { ',' });
                    if (tokens.Length < 1)
                    {
                        errors.Add(new ReadTSFError(ReadTSFError.TSF_ERRORS.TSF_SKIPPED_RACK_ENTRY_INCOMPLETE, currentLine));
                        continue;
                    }

                    int rack;
                    try { rack = int.Parse(tokens[0], invariant); }
                    catch (System.Exception)
                    {
                        errors.Add(new ReadTSFError(ReadTSFError.TSF_ERRORS.TSF_RACK_ENTRY_INVALID_RACK_VALUE, currentLine, tokens[0]));
                        continue;
                    }
                    /*
                    string rackIsoObject = tokens[1];
                    string rackIDummy = tokens[2];

                    int iRackIsoPosition;
                    try { iRackIsoPosition = int.Parse(tokens[3], invariant); }
                    catch (System.Exception)
                    {
                        errors.Add(new ReadTSFError(ReadTSFError.TSF_ERRORS.TSF_RACK_ENTRY_INVALID_ISO_POSITION, currentLine, tokens[3]));
                        continue;
                    }

                    int iRackG5DockingStation = int.Parse(tokens[4]);
                    int iRackISOModuleNum = int.Parse(tokens[5]);
                     * */

                    if (line.Contains(",B,") && tsf.GetICrashBarrierType() == TSFFile.ICRASH_BARRIER_TYPE.ITROLLEY_BARRIER)
                    {
                        errors.Add(new ReadTSFError(ReadTSFError.TSF_ERRORS.RACK_ENTRY_IWALLTEST_ITROLLEY_FUNCTIONALITY, currentLine));
                        continue;
                    }
                    if (line.Contains(",T,") && tsf.GetICrashBarrierType() == TSFFile.ICRASH_BARRIER_TYPE.IWALL_BARRIER)
                    {
                        errors.Add(new ReadTSFError(ReadTSFError.TSF_ERRORS.RACK_ENTRY_ITROLLEYTEST_IWALL_FUNCTIONALITY, currentLine));
                        continue;
                    }

                    TSFRackDescription r = null;//system.HWRack[rack];
                    foreach (var curRack in system.HWRack)
                    {
                        if (curRack.Number == rack)
                        {
                            r = curRack;
                            break;
                        }
                    }
                    if (null == r)
                    {
                        errors.Add(new ReadTSFError(ReadTSFError.TSF_ERRORS.RACK_ENTRY_INVALID_RACK_INDEX, currentLine));
                        continue;
                    }

                    if (r.HWSerialNumber == TSFFile.EMPTY_RACK_SN)
                    {
                        errors.Add(new ReadTSFError(ReadTSFError.TSF_ERRORS.RACK_ENTRY_INVALID_EMPTYRACK, currentLine));
                        continue;
                    }
                    _racks.Add(new TSFRackDescription(r));
                }
                else
                {
                    done = true;
                }
            }
        }
    }
}