using System.Web;
using System.Web.Mvc;

namespace ChadSoft.Web.Mvc
{
    public static class ScriptingExtensions
    {
        public static string RegisterStartupScript(this ViewContext context, string key, string script)
        {
            var scriptMarkup = string.Format("$(document).ready(function(){{ {0} }});", script);
            return RegisterScript(context, key, scriptMarkup);
        }
        
        public static string RegisterScript(this ViewContext context, string key, string script)
        {
            var markup = string.Empty;
            var itemKey = string.Format("Script_{0}", key);

            var contextItems = context.HttpContext.Items;
            if (contextItems[itemKey] == null)
            {
                markup = string.Format("<script type='text/javascript'>\n{0}\n</script>", script);
                contextItems[itemKey] = true;
            }

            return markup;
        }

        public static string RegisterScriptInclude(this ViewContext context, string scriptName)
        {
            var url = VirtualPathUtility.ToAbsolute(string.Format("/scripts/{0}.js", scriptName));
            return RegisterScriptInclude(context, scriptName, url);
        }
        public static string RegisterScriptInclude(this ViewContext context, string key, string url)
        {
            var markup = string.Empty;
            var itemKey = string.Format("Script_{0}", key.ToLowerInvariant());

            var contextItems = context.HttpContext.Items;
            if (contextItems[itemKey] == null)
            {
                markup = string.Format("<script type='text/javascript' src='{0}'></script>", url);
                contextItems[itemKey] = true;
            }

            return markup;
        }


        // Duplicate all of these extension methods on HtmlHelper as well (since every page has one)
        #region HtmlHelper Duplicates

        public static string RegisterStartupScript(this HtmlHelper html, string key, string script)
        {
            return html.ViewContext.RegisterStartupScript(key, script);
        }
        public static string RegisterScript(this HtmlHelper html, string key, string script)
        {
            return html.ViewContext.RegisterScript(key, script);
        }
        public static string RegisterScriptInclude(this HtmlHelper html, string name)
        {
            return html.ViewContext.RegisterScriptInclude(name);
        }
        public static string RegisterScriptInclude(this HtmlHelper html, string key, string url)
        {
            return html.ViewContext.RegisterScriptInclude(key, url);
        }

        #endregion
    }
}