using System;
using System.Data.Entity;
using System.Data.Entity.ModelConfiguration;
using System.Linq;
using System.Reflection;

namespace NFine.Data
{
    public class NFineDbContext : DbContext
    {
        //使用自定义连接串
        private static string GetEFConnctionString()
        {
            //string enString = System.Configuration.ConfigurationManager.AppSettings["connstr"];
            string connString = Extensions.SqlHelper.DataCenterConnString;// SecurityHelper.DESDecrypt(enString);

            return connString;
        }
        public NFineDbContext()
            : base(GetEFConnctionString())
        {
            this.Configuration.AutoDetectChangesEnabled = false;
            this.Configuration.ValidateOnSaveEnabled = false;
            this.Configuration.LazyLoadingEnabled = false;
            this.Configuration.ProxyCreationEnabled = false;
        }

        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            string assembleFileName = Assembly.GetExecutingAssembly().CodeBase.Replace("NFine.Data.DLL", "NFine.Mapping.DLL").Replace("file:///", "");
            Assembly asm = Assembly.LoadFile(assembleFileName);
            var typesToRegister = asm.GetTypes()
            .Where(type => !String.IsNullOrEmpty(type.Namespace))
            .Where(type => type.BaseType != null && type.BaseType.IsGenericType && type.BaseType.GetGenericTypeDefinition() == typeof(EntityTypeConfiguration<>));
            foreach (var type in typesToRegister)
            {
                dynamic configurationInstance = Activator.CreateInstance(type);
                modelBuilder.Configurations.Add(configurationInstance);
            }
            base.OnModelCreating(modelBuilder);
        }
    }
}