///
/// Copyright (c) 2013-2017 Sensus Metering Systems
///
using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
using System.Xml.Serialization;
using Config.Entities;

namespace TBF.BenchControl
{
	public class TestParamsBase : Generic.ITestParams
	{
		protected ComponentTest testParamsEntity;

		public virtual XmlSerializer GetSerializer() { return new XmlSerializer(GetType()); }

		public string ComponentName { get { return componentName; } }
		protected string componentName;

		public Test Test { get { return test; } }
		protected Test test;

		/// <summary>
		/// Parameterless constructor required for serialization
		/// </summary>
		public TestParamsBase()
		{
			InitializeAll();
		}

		/// <summary> To be overridden </summary>
		public virtual void InitializeAll()
		{
		}

        /// <summary> To be overridden </summary>
        public virtual ICollection<string> ParamValues(int ix)
        {
            return null;
        }

		/// <summary> To be overridden </summary>
		public virtual void UpdateFromDbEntity(ComponentTest dbEntity)
		{
		}

		public void FromDbEntity(string cmpntName, Test test)
		{
            ComponentTest componentTest = test.GetTestParamsEntity(cmpntName);
            if (componentTest != null)
			{
                UpdateFromDbEntity(componentTest);
				return;
			}

			/// Create a new entity and add it to the list test.MoreParams
			InitializeAll();
			this.testParamsEntity = this.ToDbEntity(cmpntName, test);
            this.testParamsEntity.SetParamsProvider(this as IParamsProvider);
			this.test = test;
			this.componentName = cmpntName;
			test.MoreParams.Add(testParamsEntity);
		}

		public ComponentTest ToDbEntity(string cmpntName, Test test)
		{
			using (var writer = new StringWriter())
			{
                GetSerializer().Serialize(writer, this);                        /// Serialize this class with parameters
                return new ComponentTest(cmpntName, writer.ToString(), test);   /// Return new ComponentTest entity
			}
		}

        /// <summary>
        /// Updates DB entities for test parameters
        /// </summary>
        /// <returns>true when successful</returns>
        public bool UpdateEmbeddedDbEntity()
		{
            if (testParamsEntity == null) return false;

			using (var writer = new StringWriter())
			{
				/// Serialize this class and update the entity
				GetSerializer().Serialize(writer, this);
				testParamsEntity.Parameters = writer.ToString();
				testParamsEntity.CmpntName = componentName;
				testParamsEntity.Test = test;
			}
            return true;
		}

		public virtual string ParamName(int i) { return string.Empty; }

		public virtual int ParamsCount() { return 0; }

		public virtual string ToString(int i) { return string.Empty; }

		public override string ToString()
		{
			StringBuilder sb = new StringBuilder();
			for (int i = 0; i < ParamsCount(); i++)
			{
				if (i != 0) sb.Append("; ");
				sb.Append(ParamName(i));
				sb.Append("=");
				sb.Append(ToString(i));
			}
			return sb.ToString();
		}
	}
}