using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Routing;
using Sleis.ViewModels;
using Sleis.Models;

namespace Sleis.HtmlHelpers
{
    public static class ToggleHelper
    {
        /// <summary>
        /// Creates a previous and next button on the page that will toggle through a list of items to the current controller and action.
        /// </summary>
        /// <param name="html"></param>
        /// <returns>
        /// <div class="align-right"> <a href="#" class="previousButton">Previous</a> <a href="#" class="nextButton">Next</a> </div>
        /// </returns>
        public static string TogglerControl(this HtmlHelper html, ToggleInfo toggle)
        {
            return TogglerControl(html, toggle, "Previous", new { @class = "previousButton" }, "Next", new { @class = "nextButton" });
        }
        public static string TogglerControl(this HtmlHelper html, ToggleInfo toggle, string backButtonText, object backButtonHtmlAttributes 
                                                , string nextButtonText, object nextButtonHtmlAttributes )
        {

            
            //prevents creating the control if no toggle info has been sent
            if (toggle != null)
            {
                var urlHelper = new UrlHelper(html.ViewContext.RequestContext);

                TagBuilder backButton = new TagBuilder("a");
                backButton.InnerHtml = backButtonText;
                //create link for previous Id
                backButton.Attributes.Add("href", toggle.GetPreviousUrl());

                backButton.MergeAttributes(new RouteValueDictionary(backButtonHtmlAttributes));

                TagBuilder nextButton = new TagBuilder("a");
                nextButton.InnerHtml = nextButtonText;
                //create link for next Id
               
                nextButton.Attributes.Add("href", toggle.GetNextUrl());
                nextButton.MergeAttributes(new RouteValueDictionary(nextButtonHtmlAttributes));

                return String.Format("{0}{1}", toggle.ShowPrevButton() ? backButton.ToString() : ""
                                             , toggle.ShowNextButton() ? nextButton.ToString() : "");
            }
            return String.Empty;
        }
    }
}