﻿#region Copyright & License

// This software is licensed under the MIT License
// 
// 
// Copyright (C) 2012-14, Rob Levine
// 
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy 
// of this software and associated documentation files (the "Software"), 
// to deal in the Software without restriction, including without limitation 
// the rights to use, copy, modify, merge, publish, distribute, sublicense, 
// and/or sell copies of the Software, and to permit persons to whom the 
// Software is furnished to do so, subject to the following conditions:
// 
// 
// The above copyright notice and this permission notice shall be included in 
// all copies or substantial portions of the Software.
// 
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 
// IN THE SOFTWARE.
// 
// [Source code: https://github.com/roblevine/UnityLoggingExtensions]

#endregion

using System;
using System.Linq;
using Microsoft.Practices.ObjectBuilder2;

namespace UnityLog4NetExtension.CreationStackTracker
{
    /// <summary>
    /// </summary>
    public class CreationStackTrackerStrategy : BuilderStrategy
    {
        #region Public Methods and Operators

        /// <summary>
        /// </summary>
        /// <param name="context">
        /// </param>
        public override void PostBuildUp(IBuilderContext context)
        {
            var policy = context.Policies.Get<ICreationStackTrackerPolicy>(buildKey: null, localOnly: true);

            if (policy.TypeStack.Count > 0)
            {
                policy.TypeStack.Pop();
            }

            base.PostBuildUp(context);
        }

        /// <summary>
        /// </summary>
        /// <param name="context">
        /// </param>
        public override void PreBuildUp(IBuilderContext context)
        {
            var policy = context.Policies.Get<ICreationStackTrackerPolicy>(buildKey: null, localOnly: true);
            if (policy == null)
            {
                context.Policies.Set(typeof (ICreationStackTrackerPolicy), new CreationStackTrackerPolicy(), null);
                policy = context.Policies.Get<ICreationStackTrackerPolicy>(buildKey: null, localOnly: true);
            }

            policy.TypeStack.Push(context.BuildKey.Type);

            base.PreBuildUp(context);
        }

        #endregion

        #region Methods

        /// <summary>
        /// </summary>
        /// <param name="typeStack">
        /// </param>
        /// <returns>
        /// </returns>
        private object ReportStack(PeekableStack<Type> typeStack)
        {
            return string.Join(", ", typeStack.Items.Select(s => s.Name));
        }

        #endregion
    }
}