using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Web.Http;
using System.Web.Http.Controllers;
using System.Web.Http.Filters;
using iiie.Logs.DataAccess;
using iiie.Logs.DBO;

namespace iiie.Authentication.Business
{
    /// <summary>
    /// Filter for controllers methods
    /// </summary>
    public class AuthFilter : ActionFilterAttribute
    {
        /// <summary>
        /// Authorized roles to access this method
        /// </summary>
        public IEnumerable<int> UserRoles { get; set; }

        /// <summary>
        /// Constructor
        /// </summary>
        /// <param name="roles">The authorized roles</param>
        public AuthFilter(params int[] roles)
        {
            UserRoles = roles.ToList();
        }

        public override void OnActionExecuting(HttpActionContext actionContext)
        {
            base.OnActionExecuting(actionContext);
            OpResult<bool> error = null;
            if (UserStorage.BasicUserDbo == null)
            {
                error = OpResult<bool>.Error(ResultStatus.PermissionError, "User is not recognized. Missing token?", "").Log();
            }
            else if (UserRoles.Any() && !UserRoles.Contains(UserStorage.BasicUserDbo.Role))
            {
                error = OpResult<bool>.Error(ResultStatus.PermissionError, string.Format("User has role {0}, but only {1} are allowed",
                    UserStorage.BasicUserDbo.Role, string.Join(",", UserRoles.Select(x => x.ToString()))), "Permission denied").Log();
            }
            if (error != null)
            {
                actionContext.Response = actionContext.Request.CreateErrorResponse(HttpStatusCode.Unauthorized, error.PublicDetails);
            }
        }
    }
}