using Microsoft.AspNetCore.Mvc.ModelBinding;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Sarand.BusinessMgr.Net.Core.Web.Middleware
{
	//=======================================================================
	/// <summary>
	/// Maps a browser request to a data object. Default class provides a base implementation of a model binder.
	/// <para>Overridden to trim whitespace from input values.</para>
	/// </summary>
	public class SbmModelBinderProvider : IModelBinderProvider
	{
		//-------------------------------------------------------------------
		// Data members.

		//-------------------------------------------------------------------
		// Construction.
		public SbmModelBinderProvider()
		{
		}

		//-------------------------------------------------------------------
		public IModelBinder GetBinder(ModelBinderProviderContext context)
		{
			if (context == null) throw new ArgumentNullException(nameof(context));

			if (context.Metadata.IsComplexType && !context.Metadata.IsCollectionType)
			{
				var propertyBinders = context.Metadata.Properties.ToDictionary(property => property, context.CreateBinder);
				ILoggerFactory loggerFactory = (ILoggerFactory)context.Services.GetService(typeof(ILoggerFactory));
				return new SbmModelBinder(propertyBinders, loggerFactory);
			}

			// Default - return null so that default binding provider is used.
			return null;
		}
	}
	//=======================================================================
}