using System;
using System.Collections;
using System.Collections.Specialized;
using System.Security;
using System.Security.Principal;
using System.Web;
using System.Web.Routing;
using Moq;

namespace Umbraco.Tests.TestHelpers
{
    /// <summary>
    /// Creates a mock http context with supporting other contexts to test against
    /// </summary>
    public class FakeHttpContextFactory
    {

        [SecuritySafeCritical]
        public FakeHttpContextFactory(Uri fullUrl)
        {
            CreateContext(fullUrl);
        }

        [SecuritySafeCritical]
        public FakeHttpContextFactory(string path)
        {
            if (path.StartsWith("http://") || path.StartsWith("https://"))
                CreateContext(new Uri(path));
            else
                CreateContext(new Uri("http://mysite" + VirtualPathUtility.ToAbsolute(path, "/")));
        }

        [SecuritySafeCritical]
        public FakeHttpContextFactory(string path, RouteData routeData)
        {
            if (path.StartsWith("http://") || path.StartsWith("https://"))
                CreateContext(new Uri(path), routeData);
            else
                CreateContext(new Uri("http://mysite" + VirtualPathUtility.ToAbsolute(path, "/")), routeData);
        }

        public HttpContextBase HttpContext { get; private set; }
        public RequestContext RequestContext { get; private set; }

        /// <summary>
        /// Mocks the http context to test against
        /// </summary>
        /// <param name="fullUrl"></param>
        /// <param name="routeData"></param>
        /// <returns></returns>
        private void CreateContext(Uri fullUrl, RouteData routeData = null)
        {
            //Request context

            var requestContextMock = new Mock<RequestContext>();

            RequestContext = requestContextMock.Object;

            //Cookie collection
            var cookieCollection = new HttpCookieCollection();
            cookieCollection.Add(new HttpCookie("UMB_UCONTEXT", "FBA996E7-D6BE-489B-B199-2B0F3D2DD826"));

            //Request
            var requestMock = new Mock<HttpRequestBase>();
            requestMock.Setup(x => x.AppRelativeCurrentExecutionFilePath).Returns("~" + fullUrl.AbsolutePath);
            requestMock.Setup(x => x.PathInfo).Returns(string.Empty);
            requestMock.Setup(x => x.RawUrl).Returns(VirtualPathUtility.ToAbsolute("~" + fullUrl.AbsolutePath, "/"));
            requestMock.Setup(x => x.RequestContext).Returns(RequestContext);
            requestMock.Setup(x => x.Url).Returns(fullUrl);
            requestMock.Setup(x => x.ApplicationPath).Returns("/");
            requestMock.Setup(x => x.Cookies).Returns(cookieCollection);
            requestMock.Setup(x => x.ServerVariables).Returns(new NameValueCollection());
            var queryStrings = HttpUtility.ParseQueryString(fullUrl.Query);
            requestMock.Setup(x => x.QueryString).Returns(queryStrings);
            requestMock.Setup(x => x.Form).Returns(new NameValueCollection());

            //Cache
            var cacheMock = new Mock<HttpCachePolicyBase>();

            //Response
            //var response = new FakeHttpResponse();
            var responseMock = new Mock<HttpResponseBase>();
            responseMock.Setup(x => x.ApplyAppPathModifier(It.IsAny<string>())).Returns((string s) => s);
            responseMock.Setup(x => x.Cache).Returns(cacheMock.Object);

            //Server

            var serverMock = new Mock<HttpServerUtilityBase>();
            serverMock.Setup(x => x.MapPath(It.IsAny<string>())).Returns(Environment.CurrentDirectory);

            //User
            var user = new Mock<IPrincipal>().Object;

            //HTTP Context

            var httpContextMock = new Mock<HttpContextBase>();
            httpContextMock.Setup(x => x.Cache).Returns(HttpRuntime.Cache);
            //note: foreach on Items should return DictionaryEntries!
            //httpContextMock.Setup(x => x.Items).Returns(new Dictionary<object, object>());
            httpContextMock.Setup(x => x.Items).Returns(new Hashtable());
            httpContextMock.Setup(x => x.Request).Returns(requestMock.Object);
            httpContextMock.Setup(x => x.Server).Returns(serverMock.Object);
            httpContextMock.Setup(x => x.Response).Returns(responseMock.Object);
            httpContextMock.Setup(x => x.User).Returns(user);

            HttpContext = httpContextMock.Object;

            requestContextMock.Setup(x => x.HttpContext).Returns(httpContextMock.Object);


            if (routeData is null)
            {
                routeData = new RouteData();
            }

            requestContextMock.Setup(x => x.RouteData).Returns(routeData);
        }

    }
}