using Microsoft.AspNetCore.Mvc.Rendering;
using Microsoft.AspNetCore.Mvc.ViewFeatures;

namespace Umbraco.Extensions
{
    public static class ViewContextExtensions
    {
        /// <summary>
        /// Creates a new ViewContext from an existing one but specifies a new Model for the ViewData
        /// </summary>
        /// <param name="vc"></param>
        /// <param name="model"></param>
        /// <returns></returns>
        public static ViewContext CopyWithModel(this ViewContext vc, object model)
        {
            return new ViewContext
                {
                    View = vc.View,
                    Writer = vc.Writer,
                    ActionDescriptor = vc.ActionDescriptor,
                    FormContext = vc.FormContext,
                    HttpContext = vc.HttpContext,
                    RouteData = vc.RouteData,
                    TempData = vc.TempData,
                    ViewData = new ViewDataDictionary(vc.ViewData)
                    {
                        Model = model
                    },
                    ClientValidationEnabled = vc.ClientValidationEnabled,
                    ExecutingFilePath = vc.ExecutingFilePath,
                    ValidationMessageElement = vc.ValidationMessageElement,
                    Html5DateRenderingMode = vc.Html5DateRenderingMode,
                    ValidationSummaryMessageElement = vc.ValidationSummaryMessageElement
                };
        }

        public static ViewContext Clone(this ViewContext vc)
        {
            return new ViewContext
            {
                View = vc.View,
                Writer = vc.Writer,
                ActionDescriptor = vc.ActionDescriptor,
                FormContext = vc.FormContext,
                HttpContext = vc.HttpContext,
                RouteData = vc.RouteData,
                TempData = vc.TempData,
                ViewData = new ViewDataDictionary(vc.ViewData),
                ClientValidationEnabled = vc.ClientValidationEnabled,
                ExecutingFilePath = vc.ExecutingFilePath,
                ValidationMessageElement = vc.ValidationMessageElement,
                Html5DateRenderingMode = vc.Html5DateRenderingMode,
                ValidationSummaryMessageElement = vc.ValidationSummaryMessageElement
            };
        }

        //public static ViewContext CloneWithWriter(this ViewContext vc, TextWriter writer)
        //{
        //    return new ViewContext
        //    {
        //        Controller = vc.Controller,
        //        HttpContext = vc.HttpContext,
        //        RequestContext = vc.RequestContext,
        //        RouteData = vc.RouteData,
        //        TempData = vc.TempData,
        //        View = vc.View,
        //        ViewData = vc.ViewData,
        //        FormContext = vc.FormContext,
        //        ClientValidationEnabled = vc.ClientValidationEnabled,
        //        UnobtrusiveJavaScriptEnabled = vc.UnobtrusiveJavaScriptEnabled,
        //        Writer = writer
        //    };
        //}
    }
}