using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web.Mvc;
using System.Linq.Expressions;

namespace Bowin.Web.Controls.Mvc
{
    public static class AutoCompleteExtensions
    {
        public static MvcHtmlString AutoComplete(this HtmlHelper htmlHelper,
            AutoCompleteOptions autoCompleteOptions,
            System.Collections.Generic.IDictionary<string, string> htmlAttributes = null)
        {
            if (!string.IsNullOrEmpty(autoCompleteOptions.Url))
            {
                var urlHelper = new UrlHelper(htmlHelper.ViewContext.RequestContext);
                autoCompleteOptions.Url = urlHelper.Content(autoCompleteOptions.Url);
            }

            return MvcHtmlString.Create(Bowin.Web.Controls.Mvc.AutoComplete.CreateControl(autoCompleteOptions, htmlAttributes).Render());
        }

        public static MvcHtmlString AutoComplete<TModel, TProperty>(this HtmlHelper<TModel> htmlHelper,
            Expression<Func<TModel, TProperty>> expression,
            AutoCompleteOptions autoCompleteOptions,
            System.Collections.Generic.IDictionary<string, string> htmlAttributes = null)
        {
            if (expression == null)
            {
                throw new ArgumentNullException("expression");
            }
            ModelMetadata modelMetadata = ModelMetadata.FromLambdaExpression<TModel, TProperty>(expression, htmlHelper.ViewData);

            //获取值
            //modelMetadata.Model

            //获取字段名称，对应标签的name
            string fullHtmlFieldName = htmlHelper.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldName(ExpressionHelper.GetExpressionText(expression));
            autoCompleteOptions.Name = fullHtmlFieldName;
            if (modelMetadata.Model != null)
            {
                autoCompleteOptions.DefaultValue = modelMetadata.Model;
            }

            if (!string.IsNullOrEmpty(autoCompleteOptions.Url))
            {
                var urlHelper = new UrlHelper(htmlHelper.ViewContext.RequestContext);
                autoCompleteOptions.Url = urlHelper.Content(autoCompleteOptions.Url);
            }

            return MvcHtmlString.Create(Bowin.Web.Controls.Mvc.AutoComplete.CreateControl(autoCompleteOptions, htmlAttributes).Render());
        }
    }
}