///
/// Copyright (c) 2013-2018 Sensus Slovensko a.s.
///
using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;

namespace Config.Entities
{
	/// <summary>
	/// Stores one transition sequence containing a list of transition steps
	/// </summary>
	public class TransitionSequence : IHasName, IHasItemNr
	{
		public virtual int Id { get; protected set; }
		public virtual int ItemNr { get; set; }
		public virtual string Name { get; set; }
        public virtual string OriName { get; set; }             /// Not mapped to database
        public virtual string Description { get; set; }			/// Short description
		public virtual IList<TransitionStep> TransitionSteps { get; set; }

		public TransitionSequence()
		{
			TransitionSteps = new List<TransitionStep>();
		}

		public TransitionSequence(string name, int itemNr)
			: this()
		{
			Name = name;
			ItemNr = itemNr;
		}

		public virtual TransitionSequence Clone()
        {
			TransitionSequence result = new TransitionSequence();
			result.Name = Name;
			result.Description = Description;
			foreach (var step in TransitionSteps) { result.TransitionSteps.Add(step.Clone()); }
            return result;
        }

        public virtual void Export(StreamWriter output)
        {
            output.WriteLine(ItemNr.ToString(CultureInfo.InvariantCulture));
            output.WriteLine(Name);
            output.WriteLine(Description);

            foreach (var step in TransitionSteps) { step.Export(output); }
            output.WriteLine();

            output.Close();
        }

        public static TransitionSequence Import(StreamReader input)
        {
            TransitionSequence result = new TransitionSequence();

            result.ItemNr = int.Parse(input.ReadLine(), CultureInfo.InvariantCulture);
            result.Name = input.ReadLine();
            result.Description = input.ReadLine();

            while (true)
            {
                TransitionStep step = TransitionStep.Import(input, result);
                if (step == null)
                    break;
                else
                    result.TransitionSteps.Add(step);
            }

            return result;
        }

        public virtual string Compare(StreamReader inp)
        {
            System.Text.StringBuilder diff = new System.Text.StringBuilder();
            const string fmt = "{0} = {1}\r\n (in the file {2})\r\n";
            string ln;

            ln = inp.ReadLine();            /// skip ItemNr
            ln = inp.ReadLine(); if (ln != Name) { diff.AppendFormat(fmt, "Name", Name, ln); };
            ln = inp.ReadLine(); if (ln != Description) { diff.AppendFormat(fmt, "Description", Description, ln); };

            //foreach (var step in TransitionSteps)
            //{
            //    string testDiff = step.Compare(inp);
            //    if (testDiff.Contains(
            //}

            return diff.ToString();
        }
    }
}