using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.ServiceModel.Channels;
using System.Threading;
using System.Web;
using System.Web.Http.Filters;

namespace Weee.Filter
{
    public class ApiLogAttribute : ActionFilterAttribute, IActionFilter
    {
        private string _ActionDisplayName;
        private string _ModuleDisplayName;
        public ApiLogAttribute(string ActionDisplayName = null, string ModuleDisplayName = null)
        {
            _ActionDisplayName = ActionDisplayName;
            _ModuleDisplayName = ModuleDisplayName;
        }

        public override System.Threading.Tasks.Task OnActionExecutedAsync(HttpActionExecutedContext actionExecutedContext, CancellationToken cancellationToken)
        {
            var username = actionExecutedContext.ActionContext.ControllerContext.RequestContext.Principal == null ? "" : actionExecutedContext.ActionContext.ControllerContext.RequestContext.Principal.Identity.Name;
            String message =
                    String.Format(
                    "Method=[{0}] ,User=[{1}], Action=[{2}], Controller=[{3}], IPAddress=[{4}]" +
                    "TimeStamp=[{5}]",
                    "OnActionExecuted",
                    username,
                    _ActionDisplayName??actionExecutedContext.ActionContext.ActionDescriptor.ActionName,
                    _ModuleDisplayName??actionExecutedContext.ActionContext.ControllerContext.ControllerDescriptor.ControllerName,
                    GetClientIp(actionExecutedContext.Request),
                    DateTime.Now);

            System.Diagnostics.Debug.WriteLine(message);
            var db = actionExecutedContext.ActionContext.Request.GetDependencyScope().GetService(typeof(Weee.DAL.WeeeDataContext)) as Weee.DAL.WeeeDataContext;
            var log = new Weee.Models.ActionLog()
            {
                Name = username,
                Action = _ActionDisplayName??actionExecutedContext.ActionContext.ActionDescriptor.ActionName,
                Controller = _ModuleDisplayName??actionExecutedContext.ActionContext.ControllerContext.ControllerDescriptor.ControllerName,
                IP = GetClientIp(actionExecutedContext.Request),
                ActionTime = DateTime.Now,
                ExecuteResult = actionExecutedContext.Exception == null ? "success" : "exception: " + actionExecutedContext.Exception.Message
            };
            db.ActionLogs.Add(log);
            db.SaveChanges();


            return base.OnActionExecutedAsync(actionExecutedContext, cancellationToken);
        }

        private string GetClientIp(HttpRequestMessage request)
        {
            if (request.Properties.ContainsKey("MS_HttpContext"))
            {
                return ((HttpContextWrapper)request.Properties["MS_HttpContext"]).Request.UserHostAddress;
            }
            else if (request.Properties.ContainsKey(RemoteEndpointMessageProperty.Name))
            {
                RemoteEndpointMessageProperty prop;
                prop = (RemoteEndpointMessageProperty)request.Properties[RemoteEndpointMessageProperty.Name];
                return prop.Address;
            }
            else
            {
                return null;
            }
        }
    }

}