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

namespace DTS.Common.Classes.TMAT
{

    /// <summary>
    /// this class handles a TMATS template split into two files
    /// </summary>
    public class TmtSplitFile : TmtBase
    {
        private readonly List<string> _lines = new List<string>();
        private readonly Dictionary<int, List<string>> _allChannels = new Dictionary<int, List<string>>();
        private readonly List<string> _channelTemplate = new List<string>();

        public override string[] GetAllLines()
        {
            if (!_allChannels.Any()) { return _lines.ToArray(); }
            var lines = new List<string>(_lines.ToArray());
            var min = _allChannels.Keys.Min();
            var max = _allChannels.Keys.Max();
            for( var i = min; i<= max; i++)
            {
                if (_allChannels.ContainsKey(i))
                {
                    lines.AddRange(_allChannels[i].ToArray());
                }
            }
            return lines.ToArray();
        }
        private void AddChannelIfNeeded(int channelNumber)
        {
            if (!_allChannels.ContainsKey(channelNumber))
            {
                _allChannels.Add(channelNumber, _channelTemplate.ToList());
            }
        }
        /// <summary>
        /// updates the files in the file with a given value
        /// </summary>
        public override void UpdateValue(TMTChannelKeysEx key, string value, int channelNumber)
        {
            AddChannelIfNeeded(channelNumber);
            var lines = _allChannels[channelNumber];
            var pattern = TMTKey.GetKey(key);
            for (int i = 0; i < lines.Count; i++)
            {
                if (lines[i].Contains(pattern))
                {
                    lines[i] = lines[i].Replace(pattern, value);
                }
            }
        }
        /// <summary>
        /// updates the fields in the file with a given value
        /// </summary>
        /// <param name="key"></param>
        /// <param name="value"></param>
        public override void UpdateValue(TMTGlobalKeys key, string value)
        {
            var pattern = TMTKey.GetKey(key);
            for (int i = 0; i < _lines.Count; i++)
            {
                if (_lines[i].Contains(pattern))
                {
                    _lines[i] = _lines[i].Replace(pattern, value);
                }
            }
        }
        /// <summary>
        /// updates the files in the file with the given value
        /// </summary>
        /// <param name="key"></param>
        /// <param name="value"></param>
        /// <param name="channelNumber"></param>
        public override void UpdateValue(TMTChannelKeys key, string value, int channelNumber)
        {
            var pattern = TMTKey.GetKey(key, channelNumber);
            for (int i = 0; i < _lines.Count; i++)
            {
                if (_lines[i].Contains(pattern))
                {
                    _lines[i] = _lines[i].Replace(pattern, value);
                }
            }
        }

        public TmtSplitFile(string dasTemplate, string channelTemplate)
        {
            if (System.IO.File.Exists(dasTemplate))
            {
                _lines.AddRange(System.IO.File.ReadAllLines(dasTemplate));
            }
            if (System.IO.File.Exists(channelTemplate))
            {
                _channelTemplate.AddRange(System.IO.File.ReadAllLines(channelTemplate));
            }
        }
    }
}