using System;
using System.Collections.Concurrent;
using System.Linq;
using System.Net.Http.Formatting;
using Umbraco.Core;
using Umbraco.Web.Models.Trees;
using Umbraco.Web.Mvc;

namespace Umbraco.Web.Trees
{
    /// <summary>
    /// The base controller for all tree requests
    /// </summary>
    public abstract class TreeController : TreeControllerBase
    {
        private readonly TreeAttribute _attribute;

        protected TreeController()
        {
            //Locate the tree attribute
            var treeAttributes = GetType()
                .GetCustomAttributes(typeof(TreeAttribute), false)
                .OfType<TreeAttribute>()
                .ToArray();

            if (treeAttributes.Any() == false)
            {
                throw new InvalidOperationException("The Tree controller is missing the " + typeof(TreeAttribute).FullName + " attribute");
            }

            //assign the properties of this object to those of the metadata attribute
            _attribute = treeAttributes.First();
        }

        /// <summary>
        /// The name to display on the root node
        /// </summary>
        public override string RootNodeDisplayName
        {
            get { return _attribute.Title; }
        }

        /// <summary>
        /// Gets the current tree alias from the attribute assigned to it.
        /// </summary>
        public override string TreeAlias
        {
            get { return _attribute.Alias; }
        }

    }
}