using System;
using System.Collections.Generic;
using System.Data.Objects;
using System.Data.Objects.DataClasses;
using System.Linq;
using System.Text;

namespace SupplierManual.Data
{
    public class Repository :IRepository
    {
        private SupplierManualEntities objectContext;

        public Repository()
        {
            objectContext = new SupplierManualEntities();
        }

        public IQueryable<TEntity> Queriable<TEntity>() where TEntity : class
        {
            Type baseType;
            if (HasBaseType(typeof(TEntity), out baseType))
            {
                return this.objectContext.CreateQuery<TEntity>(String.Format("[{0}]", baseType.Name.ToString())).OfType<TEntity>();
            }
            else
            {
                return this.objectContext.CreateQuery<TEntity>(String.Format("[{0}]", typeof(TEntity).Name.ToString()));
            }
        }

        public void Add<TEntity>(TEntity entity) where TEntity : class
        {
            throw new NotImplementedException();
        }

        public void Update<TEntity>(TEntity entity) where TEntity : class
        {
            throw new NotImplementedException();
        }

        public void Delete<TEntity>(TEntity entity) where TEntity : class
        {
            throw new NotImplementedException();
        }

        public void Dispose()
        {
            throw new NotImplementedException();
        }

        public void SaveChange()
        {
            throw new NotImplementedException();
        }

        private bool HasBaseType(Type type, out Type baseType)
        {
            Type originalType = type.GetType();
            baseType = GetBaseType(type);
            return baseType != originalType;
        }

        private static Type GetBaseType(Type type)
        {
            Type baseType = type.BaseType;
            if (baseType != null && baseType != typeof(EntityObject))
            {
                return GetBaseType(type.BaseType);
            }
            return type;
        }

    }

}