using System.Collections.Generic;

namespace DTS.Common.Classes.TMAT
{

    /// <summary>
    /// these are all the patterns that represent global keys
    /// </summary>
    public enum TMTGlobalKeys
    {
        [TMTKey("{NAME OF PROGRAM}")] NameOfProgram,
        [TMTKey("{TEST ID}")] TestId,
        [TMTKey("{DAS SERIAL NUMBER}")] DASSerialNumber,
        [TMTKey("{DAS INDEX}")] DASIndex,
        [TMTKey("{DAS SAMPLE RATE}")] DASSampleRate,
        [TMTKey("{TEST TIMESTAMP}")] TestTimeStamp,
        [TMTKey("{DAS BIT RATE}")] DASBitRate,
        [TMTKey("{STREAM TIME FORMAT}")] StreamTimeFormat,
        //FB 26736 Keys for time & data channel Id
        [TMTKey("{UDP STREAM TIME CHANNEL ID}")] UdpStreamTimeChannelId,
        [TMTKey("{UDP STREAM DATA CHANNEL ID}")] UdpStreamDataChannelId,
        //FB 29996 Key for file creation date
        [TMTKey("{CREATE DATE}")] CreateDate
    }
    /// <summary>
    /// these are all the patterns that represent channel keys
    /// </summary>
    public enum TMTChannelKeys
    {
        [TMTKey("{{CHANNEL {0} HARDWARE CHANNEL NUMBER}}")] HardwareChannelNumber,
        [TMTKey("{{CHANNEL {0} NAME}}")] ChannelName,
        [TMTKey("{{CHANNEL {0} COUPLING MODE}}")] CouplingMode,
        [TMTKey("{{CHANNEL {0} BRIDGE RESISTANCE}}")] BridgeResistance,
        [TMTKey("{{CHANNEL {0} AAF}}")] AAF,
        [TMTKey("{{CHANNEL {0} OFFSET mV}}")] OffsetMV,
        [TMTKey("{{CHANNEL {0} INPUT RANGE}}")] InputRangeMV,
        [TMTKey("{{CHANNEL {0} MAX RANGE EU}}")] MaxRangeEU,
        [TMTKey("{{CHANNEL {0} MIN RANGE EU}}")] MinRangeEU,
        [TMTKey("{{CHANNEL {0} EU}}")] EU,
        [TMTKey("{{CHANNEL {0} SCALEFACTOR EU}}")] ScaleFactorEU,
        [TMTKey("{{CHANNEL {0} OFFSET EU}}")] OffsetEU,
    }

    /// <summary>
    /// Helper attribute, allows us to associate patterns to enums to make processing file easier
    /// </summary>
    [System.AttributeUsage(System.AttributeTargets.Field)]
    public class TMTKey : System.Attribute
    {
        /// <summary>
        /// the pattern to look for in a line to replace
        /// </summary>
        public string Key { get; set; }

        public TMTKey(string key)
        {
            Key = key;
        }
        /// <summary>
        /// returns the pattern to look for in a line for a given property
        /// </summary>
        /// <param name="o"></param>
        /// <returns></returns>
        public static string GetKey(TMTGlobalKeys o)
        {
            var mi = o.GetType().GetMember(o.ToString());
            if (mi.Length <= 0) return string.Empty;
            return GetCustomAttribute(mi[0], typeof(TMTKey)) is TMTKey attr ? attr.Key : string.Empty;
        }
        /// <summary>
        /// returns the pattern to look for in a line for a given channel property
        /// </summary>
        /// <param name="o"></param>
        /// <param name="channelNumber"></param>
        /// <returns></returns>
        public static string GetKey(TMTChannelKeys o, int channelNumber)
        {
            var mi = o.GetType().GetMember(o.ToString());
            if (mi.Length <= 0) return string.Empty;
            if (GetCustomAttribute(mi[0], typeof(TMTKey)) is TMTKey attr)
            {
                return string.Format(attr.Key, channelNumber);
            }
            else
            {
                return string.Empty;
            }
        }
    }
    public interface ITMTTemplate
    {
        /// <summary>
        /// updates the fields in the file with a given value
        /// </summary>
        /// <param name="key"></param>
        /// <param name="value"></param>
        void UpdateValue(TMTGlobalKeys key, string 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>
        void UpdateValue(TMTChannelKeys key, string value, int channelNumber);


        /// <summary>
        /// returns all lines in the TMT file
        /// </summary>
        /// <returns></returns>
        string[] GetAllLines();
    } 
    public class TMTTemplate :ITMTTemplate
    {
        /// <summary>
        /// reads all lines from the file in the given location and prepare to update values
        /// </summary>
        /// <param name="templateLocation"></param>
        public TMTTemplate(string templateLocation)
        {
            if (System.IO.File.Exists(templateLocation))
            {
                _allLines.AddRange(System.IO.File.ReadAllLines(templateLocation));
            }
        }

        /// <summary>
        /// constructs a new template with the given lines of content
        /// </summary>
        /// <param name="lines"></param>
        public TMTTemplate(string[] lines)
        {
            _allLines.AddRange(lines);
        }

        /// <summary>
        /// updates the fields in the file with a given value
        /// </summary>
        /// <param name="key"></param>
        /// <param name="value"></param>
        public void UpdateValue(TMTGlobalKeys key, string value)
        {
            var pattern = TMTKey.GetKey(key);
            for (int i = 0; i < _allLines.Count; i++)
            {
                if (_allLines[i].Contains(pattern))
                {
                    _allLines[i] = _allLines[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 void UpdateValue(TMTChannelKeys key, string value, int channelNumber)
        {
            var pattern = TMTKey.GetKey(key, channelNumber);
            for (int i = 0; i < _allLines.Count; i++)
            {
                if (_allLines[i].Contains(pattern))
                {
                    _allLines[i] = _allLines[i].Replace(pattern, value);
                }
            }
        }
        /// <summary>
        /// all lines in the TMT file
        /// </summary>
        private List<string> _allLines = new List<string>();

        /// <summary>
        /// returns all lines in the TMT file
        /// </summary>
        /// <returns></returns>
        public string[] GetAllLines()
        {
            return _allLines.ToArray();
        }
    }
  
}