using System;
using System.Text;
using System.Collections.Generic;
using System.Linq;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using HeuristicLab.Services.Authentication;
using HL = HeuristicLab.Services.Authentication;
using DA = HeuristicLab.Services.Authentication.DataAccess;
using DT = HeuristicLab.Services.Authentication.DataTransfer;
using System.Data;
using System.Data.Common;
using System.Data.Linq;
using System.Collections;

namespace TestWebService {
  [TestClass]
  public class WebserviceUnitTest {

    private string sqlCountClients = @"SELECT COUNT(*) FROM Resource where ResourceType = 'Client'";
    private string sqlCountGroups = @"SELECT COUNT(*) FROM Resource where ResourceType = 'ResourceGroup'";

    #region TestIdsAndNames
    private Guid groupID1 = Guid.NewGuid();
    private string groupName1 = "groupName1";
    private Guid groupID2 = Guid.NewGuid();
    private string groupName2 = "groupName2";
    private Guid groupID3 = Guid.NewGuid();
    private string groupName3 = "groupName3";

    private Guid clientID1 = Guid.NewGuid();
    private string clientName1 = "clientName1";
    private Guid clientID2 = Guid.NewGuid();
    private string clientName2 = "clientName2";
    #endregion

    #region ValidationMethods
    class ClientEqualityComparer : IEqualityComparer<DT.Client> {
      public bool Equals(DT.Client c1, DT.Client c2) {
        return (
          c1.Name == c2.Name &&
          c1.Id == c2.Id &&
          c1.Description == c2.Description &&
          c1.IPAdress == c2.IPAdress &&
          c1.NumberOfProcessors == c2.NumberOfProcessors &&
          c1.NumberOfThreads == c2.NumberOfThreads &&
          c1.OperatingSystem == c2.OperatingSystem &&
          c1.ProcessorType == c2.ProcessorType
        );
      }

      public int GetHashCode(DT.Client obj) {
        throw new NotImplementedException();
      }
    }

    class ResourceGroupEqualityComparer : IEqualityComparer<DT.ResourceGroup> {
      public bool Equals(DT.ResourceGroup rg1, DT.ResourceGroup rg2) {
        return (
          rg1.Name == rg2.Name &&
          rg1.Id == rg2.Id &&
          rg1.Description == rg2.Description
        );
      }

      public int GetHashCode(DT.ResourceGroup obj) {
        throw new NotImplementedException();
      }
    }

    class ResourceEqualityComparer : IEqualityComparer<DT.Resource> {
      public bool Equals(DT.Resource rg1, DT.Resource rg2) {
        return (
          rg1.Name == rg2.Name &&
          rg1.Id == rg2.Id
        );
      }

      public int GetHashCode(DT.Resource obj) {
        throw new NotImplementedException();
      }
    }

    private bool CompareClients(DT.Client c1, DT.Client c2) {
      return (
        c1.Name == c2.Name &&
        c1.Id == c2.Id &&
        c1.ResourceType == c2.ResourceType &&
        c1.Description == c2.Description &&
        c1.IPAdress == c2.IPAdress &&
        c1.NumberOfProcessors == c2.NumberOfProcessors &&
        c1.NumberOfThreads == c2.NumberOfThreads &&
        c1.OperatingSystem == c2.OperatingSystem &&
        c1.ProcessorType == c2.ProcessorType
        );
    }

    private bool CompareGroups(DT.ResourceGroup r1, DT.ResourceGroup r2) {
      return (
        r1.Name == r2.Name &&
        r1.Id == r2.Id &&
        //c1.ResourceType == c2.ResourceType &&
        r1.Description == r2.Description
        );
    }

    private bool CompareResources(DT.Resource r1, DT.Resource r2) {
      return (
        r1.Name == r2.Name &&
        r1.Id == r2.Id
        );
    }

    private static int GetNumberOfEntries(string sqlCommand) {
      DA.ClientManagmentDataContext dc = new DA.ClientManagmentDataContext();
      try {
        IEnumerable<int> cnt = dc.ExecuteQuery<int>(sqlCommand);
        return (int)cnt.First();
      }
      catch (Exception e) {
        return 0;
      }
    }
    #endregion

    #region PublicResources
    DA.ClientManagmentDataContext dc = null;

    public DT.Client cl1 = null;
    public DT.Client cl2 = null;
    public DT.Client cl3 = null;

    public DT.ResourceGroup rg1 = null;
    public DT.ResourceGroup rg2 = null;
    public DT.ResourceGroup rg3 = null;

    public DA.ResourceResourceGroup rrg1 = null;
    public DA.ResourceResourceGroup rrg2 = null;
    public DA.ResourceResourceGroup rrg3 = null;
    public DA.ResourceResourceGroup rrg4 = null;
    public DA.ResourceResourceGroup rrg5 = null;
    #endregion

    #region Additional test attributes
    //
    // You can use the following additional attributes as you write your tests:
    //
    // Use ClassInitialize to run code before running the first test in the class
    // [ClassInitialize()]
    // public static void MyClassInitialize(TestContext testContext) { }
    //
    // Use ClassCleanup to run code after all tests in a class have run
    // [ClassCleanup()]
    // public static void MyClassCleanup() { }
    //
    // Use TestInitialize to run code before running each test 
    // [TestInitialize()]
    // public void MyTestInitialize() { }
    //
    // Use TestCleanup to run code after each test has run
    // c
    // public void MyTestCleanup() { }
    //
    #endregion

    [TestInitialize()]
    public void Init() {

      dc = new DA.ClientManagmentDataContext();
      if (dc.DatabaseExists()) {
        //dc.DeleteDatabase();
        dc.ExecuteCommand("delete from ResourceResourceGroup");
        dc.ExecuteCommand("delete from Resource");
        dc.SubmitChanges();
      }
      else {
        dc.CreateDatabase();
        dc.SubmitChanges();
      }


      // create groups
      rg1 = new DT.ResourceGroup();
      rg1.Name = groupName1;
      rg1.Id = groupID1;
      rg1.Description = "descr rg1";
      dc.GetTable<DA.Resource>().InsertOnSubmit(HL.Convert.ToEntity(rg1));

      rg2 = new DT.ResourceGroup();
      rg2.Name = groupName2;
      rg2.Id = groupID2;

      IList<Guid> rgList = new List<Guid>();
      rgList.Add(rg1.Id);
      rg2.ResourceGroup = rgList;

      rg2.Description = "descrrg2";
      dc.GetTable<DA.Resource>().InsertOnSubmit(HL.Convert.ToEntity(rg2));

      rg3 = new DT.ResourceGroup();
      rg3.Name = groupName3;
      rg3.Id = groupID3;
      rg3.Description = "descrrg3";
      dc.GetTable<DA.Resource>().InsertOnSubmit(HL.Convert.ToEntity(rg3));

      // create clients
      cl1 = new DT.Client();
      cl1.Name = clientName1;
      cl1.Id = clientID1;

      IList<Guid> rgList1 = new List<Guid>();
      rgList.Add(groupID1);
      cl1.ResourceGroup = rgList1;

      cl1.Description = "Test-PC-1";
      cl1.IPAdress = "192.168.0.10";
      cl1.NumberOfProcessors = "2";
      cl1.NumberOfThreads = "4";
      cl1.OperatingSystem = "WINXP";
      cl1.MemorySize = "2048";
      cl1.ProcessorType = "AMD";
      dc.GetTable<DA.Resource>().InsertOnSubmit(HL.Convert.ToEntity(cl1));

      cl2 = new DT.Client();
      cl2.Name = clientName2;
      cl2.Id = clientID2;

      IList<Guid> rgList2 = new List<Guid>();
      rgList.Add(groupID2);
      cl2.ResourceGroup = rgList2;

      cl2.Description = "Test-PC-2";
      cl2.IPAdress = "192.168.0.20";
      cl2.NumberOfProcessors = "4";
      cl2.NumberOfThreads = "4";
      cl2.OperatingSystem = "Vista";
      cl2.MemorySize = "4096";
      cl2.ProcessorType = "Intel";
      dc.GetTable<DA.Resource>().InsertOnSubmit(HL.Convert.ToEntity(cl2));

      // ResourceResourceGroups
      rrg1 = new DA.ResourceResourceGroup();
      rrg1.ResourceId = cl1.Id;
      rrg1.ResourceGroupId = rg1.Id;
      dc.GetTable<DA.ResourceResourceGroup>().InsertOnSubmit(rrg1);

      // ResourceResourceGroups
      rrg5 = new DA.ResourceResourceGroup();
      rrg5.ResourceId = cl1.Id;
      rrg5.ResourceGroupId = rg2.Id;
      dc.GetTable<DA.ResourceResourceGroup>().InsertOnSubmit(rrg5);

      DA.ResourceResourceGroup rrg2 = new DA.ResourceResourceGroup();
      rrg2.ResourceId = cl2.Id;
      rrg2.ResourceGroupId = rg2.Id;
      dc.GetTable<DA.ResourceResourceGroup>().InsertOnSubmit(rrg2);

      //DA.ResourceResourceGroup rrg3 = new DA.ResourceResourceGroup();
      //rrg3.ResourceId = rg3.Id;
      //rrg3.ResourceGroupId = rg1.Id;
      //dc.GetTable<DA.ResourceResourceGroup>().InsertOnSubmit(rrg3);

      rrg4 = new DA.ResourceResourceGroup();
      rrg4.ResourceId = rg2.Id;
      rrg4.ResourceGroupId = rg1.Id;
      dc.GetTable<DA.ResourceResourceGroup>().InsertOnSubmit(rrg4);

      dc.SubmitChanges();
    }

    [TestCleanup()]
    public void CleanUp() {
      //dc = new DA.ClientManagmentDataContext();
      //if (dc.DatabaseExists()) {
      //  //dc.DeleteDatabase();
      //  dc.ExecuteCommand("delete from ResourceResourceGroup");
      //  dc.ExecuteCommand("delete from Resource");
      //  dc.SubmitChanges();
      //}
      //else {
      //  dc.CreateDatabase();
      //  dc.SubmitChanges();
      //}
    }

    #region TestMethods

    #region TestGroup

    /// <summary>
    /// Add ResourceGroup
    /// </summary>
    [TestMethod]
    public void TestAddResourceGroup() {
      AuthenticationService cs = new AuthenticationService();

      DT.ResourceGroup rg4 = new DT.ResourceGroup();
      rg4.Name = "groupName4";
      rg4.Description = "descrrg4";
      dc.GetTable<DA.Resource>().InsertOnSubmit(HL.Convert.ToEntity(rg4));

      int cntPrev = GetNumberOfEntries(sqlCountGroups);
      rg4.Id = cs.AddResourceGroup(rg4);
      Assert.AreNotEqual(Guid.Empty, rg4.Id);
      int cntNew = GetNumberOfEntries(sqlCountGroups);
      Assert.AreEqual(cntPrev, (cntNew - 1));

      DA.ResourceGroup group = dc.Resources.OfType<DA.ResourceGroup>().First(x => x.Id == rg4.Id);
      Assert.IsTrue(CompareGroups(HL.Convert.ToDto(group), rg4));
    }

    /// <summary>

    /// </summary>
    [TestMethod]
    public void TestUpdateResourceGroup() {
      AuthenticationService cs = new AuthenticationService();

      DA.ResourceGroup group = dc.Resources.OfType<DA.ResourceGroup>().First(x => x.Id == rg1.Id);
      DT.ResourceGroup modGroup = HeuristicLab.Services.Authentication.Convert.ToDto(group);


      modGroup.Name = "clientName1_modified";

      IList<Guid> rgList = new List<Guid>();
      rgList.Add(groupID3);
      modGroup.ResourceGroup = rgList;
      modGroup.Description = "Test-group_modifiet";

      cs.UpdateResourceGroup(modGroup);
    }

    /// <summary>
    /// GetResourceGroup with existing id
    /// </summary>
    [TestMethod]
    public void TestGetResourceGroup() {
      AuthenticationService cs = new AuthenticationService();
      DT.ResourceGroup rg = cs.GetResourceGroup(groupID1);
      Assert.AreEqual(rg.Id, groupID1);
      Assert.IsTrue(CompareGroups(rg, rg1));
    }

    /// <summary>
    /// GetResourceGroups
    /// </summary>
    [TestMethod]
    public void TestGetResourceGroups() {
      AuthenticationService cs = new AuthenticationService();
      IEnumerable<DT.ResourceGroup> groups = cs.GetResourceGroups();
      Assert.AreEqual(3, groups.Count<DT.ResourceGroup>());
      Assert.IsTrue(
        groups.Contains(rg1, new ResourceGroupEqualityComparer()) &&
        groups.Contains(rg2, new ResourceGroupEqualityComparer()) &&
        groups.Contains(rg3, new ResourceGroupEqualityComparer())
      );
    }

    /// <summary>
    /// Delete existing ResourceGroup which is no parent group
    /// </summary>
    [TestMethod]
    public void TestDeleteResourceGroup1() {
      AuthenticationService cs = new AuthenticationService();

      int cntPrev = GetNumberOfEntries(sqlCountGroups);
      cs.DeleteResourceGroup(rg2);
      int cntNew = GetNumberOfEntries(sqlCountGroups);
      Assert.AreEqual(cntPrev, (cntNew + 1));
    }

    /// <summary>
    /// try to delete existing ResourceGroup wich is parent group
    /// </summary>
    [TestMethod]
    public void TestDeleteResourceGroup2() {
      AuthenticationService cs = new AuthenticationService();
      int cntPrev = GetNumberOfEntries(sqlCountGroups);
      cs.DeleteResourceGroup(rg1);
      int cntNew = GetNumberOfEntries(sqlCountGroups);
      Assert.AreEqual(cntPrev, cntNew);
    }
    #endregion


    #region TestClient

    /// <summary>
    /// AddClient
    /// </summary>
    [TestMethod]
    public void TestAddClient1() {
      AuthenticationService cs = new AuthenticationService();

      DT.Client cl3 = new DT.Client();
      cl3.Name = "clientName3";

      IList<Guid> rgList = new List<Guid>();
      rgList.Add(groupID3);
      cl3.ResourceGroup = rgList;

      cl3.Description = "Test-PC-3";
      cl3.IPAdress = "192.168.0.30";
      cl3.NumberOfProcessors = "2";
      cl3.NumberOfThreads = "2";
      cl3.OperatingSystem = "Vista";
      cl3.MemorySize = "4096";
      cl3.ProcessorType = "Intel";

      int cntPrev = GetNumberOfEntries(sqlCountClients);
      cl3.Id = cs.AddClient(cl3);
      Assert.AreNotEqual(Guid.Empty, cl3.Id);
      int cntNew = GetNumberOfEntries(sqlCountClients);
      Assert.AreEqual(cntPrev, (cntNew - 1));

      DA.Client client = dc.Resources.OfType<DA.Client>().First(x => x.Id == cl3.Id);
      Assert.IsTrue(CompareClients(HL.Convert.ToDto(client), cl3));
    }

    /// <summary>
    /// try to AddClient with not existing ResourceGroup
    /// </summary>
    [TestMethod]
    public void TestAddClient2() {
      AuthenticationService cs = new AuthenticationService();

      DT.Client cl3 = new DT.Client();
      cl3.Name = "clientNamexxxx";

      IList<Guid> rgList = new List<Guid>();
      rgList.Add(Guid.NewGuid());
      cl3.ResourceGroup = rgList;

      int cntPrev = GetNumberOfEntries(sqlCountClients);
      cl3.Id = cs.AddClient(cl3);
      Assert.AreEqual(Guid.Empty, cl3.Id);
      int cntNew = GetNumberOfEntries(sqlCountClients);
      Assert.AreEqual(cntPrev, cntNew);
    }

    /// <summary>
    /// GetClient by Id
    /// </summary>
    [TestMethod]
    public void TestGetClient1() {
      AuthenticationService cs = new AuthenticationService();
      DT.Client cl = cs.GetClient(clientID1);
      Assert.AreEqual(cl.Id, clientID1);
      Assert.IsTrue(CompareClients(cl, cl1));
    }

    /// <summary>
    /// causes error
    ///   !!!!!!!!!!!!!!!!!!!!!!
    ///   
    /// try GetClient with not existin id
    /// </summary>
    //[TestMethod]
    //public void TestGetClient2() {
    //  AuthenticationService cs = new AuthenticationService();
    //  DT.Client cl = cs.GetClient(Guid.NewGuid());
    //  Assert.IsNull(cl);
    //}

    ///// <summary>
    ///// Test of Method "Client GetClient(Guid id)"
    ///// </summary>
    //[TestMethod]
    //public void TestGetClient3() {
    //  AuthenticationService cs = new AuthenticationService();
    //  DT.Client cl = cs.GetClient(Guid.Empty);
    //  Assert.IsNull(cl);
    //}

    //[TestMethod]
    //public void TestUpdateClient() {
    //}

    /// <summary>
    /// delete existing client
    /// </summary>
    [TestMethod]
    public void TestDeleteClient1() {
      AuthenticationService cs = new AuthenticationService();

      int cntPrev = GetNumberOfEntries(sqlCountClients);
      cs.DeleteClient(cl1);
      int cntNew = GetNumberOfEntries(sqlCountClients);
      Assert.AreEqual(cntPrev, (cntNew + 1));
    }

    ///// <summary>
    ///// try to delete not existing client
    ///// </summary>
    //[TestMethod]
    //public void TestDeleteClient2() {
    //  AuthenticationService cs = new AuthenticationService();
    //  DT.Client cl3 = new DT.Client();
    //  cl3.Name = "clientName3";

    //  IList<Guid> rgList = new List<Guid>();
    //  rgList.Add(groupID3);
    //  cl3.ResourceGroup = rgList;

    //  cl3.Description = "Test-PC-3";
    //  cl3.IPAdress = "192.168.0.30";
    //  cl3.NumberOfProcessors = "2";
    //  cl3.NumberOfThreads = "2";
    //  cl3.OperatingSystem = "Vista";
    //  cl3.MemorySize = "4096";
    //  cl3.ProcessorType = "Intel";

    //  int cntPrev = GetNumberOfEntries(sqlCountClients);
    //  cs.DeleteClient(cl3);
    //  int cntNew = GetNumberOfEntries(sqlCountClients);
    //  Assert.AreEqual(cntPrev, cntNew);
    //}

    /// <summary>
    /// get all clients
    /// </summary>
    [TestMethod]
    public void TestGetClients() {
      AuthenticationService cs = new AuthenticationService();
      IEnumerable<DT.Client> clients = cs.GetClients();
      Assert.AreEqual(2, clients.Count<DT.Client>());
      Assert.IsTrue(
        clients.Contains(cl1, new ClientEqualityComparer()) &&
        clients.Contains(cl2, new ClientEqualityComparer())
      );
    }

    /// <summary>
    /// update existing client
    /// </summary>
    [TestMethod]
    public void TestUpdateClient1() {
      AuthenticationService cs = new AuthenticationService();

      DA.Client client = dc.Resources.OfType<DA.Client>().First(x => x.Id == cl1.Id);
      DT.Client modClient = HeuristicLab.Services.Authentication.Convert.ToDto(client);

      //cl1.Id ;
      //cl1.ResourceType ;
      modClient.Name = "clientName1_modified";

      IList<Guid> rgList = new List<Guid>();
      rgList.Add(groupID3);
      modClient.ResourceGroup = rgList;

      modClient.Description = "Test-PC-1_modifiet";
      modClient.IPAdress = "192.168.0.11";
      modClient.NumberOfProcessors = "4";
      modClient.NumberOfThreads = "2";
      modClient.OperatingSystem = "Vista";
      modClient.MemorySize = "2196";
      modClient.ProcessorType = "Intel";

      cs.UpdateClient(modClient);

      //DA.Client client1 = dc.Resources.OfType<DA.Client>().First(x => x.Id == cl1.Id);
      //Assert.IsTrue(CompareClients(HL.Convert.ToDto(client1), modClient));
    }

    ///// <summary>
    ///// try to update not existing client
    ///// </summary>
    //[TestMethod]
    //public void TestUpdateClient2() {
    //  AuthenticationService cs = new AuthenticationService();
    //  DT.Client cl3 = new DT.Client();
    //  cl3.Id = Guid.NewGuid();
    //  cl3.Name = "clientName3";

    //  IList<Guid> rgList = new List<Guid>();
    //  rgList.Add(groupID3);
    //  cl3.ResourceGroup = rgList;

    //  cl3.Description = "Test-PC-3";
    //  cl3.IPAdress = "192.168.0.30";
    //  cl3.NumberOfProcessors = "2";
    //  cl3.NumberOfThreads = "2";
    //  cl3.OperatingSystem = "Vista";
    //  cl3.MemorySize = "4096";
    //  cl3.ProcessorType = "Intel";

    //  int cntPrev = GetNumberOfEntries(sqlCountClients);
    //  //Assert.IsFalse(cs.UpdateClient(cl3));
    //  int cntNew = GetNumberOfEntries(sqlCountClients);
    //  Assert.AreEqual(cntPrev, cntNew);

    //  DA.Client client = dc.Resources.OfType<DA.Client>().First(x => x.Id == cl3.Id);
    //  Assert.IsNull(client);
    //}

    #endregion

    /// <summary>
    /// get Members
    /// </summary>
    [TestMethod]
    public void TestGetMembers() {
      AuthenticationService cs = new AuthenticationService();
      IEnumerable<DT.Resource> members = cs.GetMembers(rg1.Id);
      Assert.AreEqual(2, members.Count());
    }

    /// <summary>
    /// get ResourceGroupsOf
    /// </summary>
    [TestMethod]
    public void TestGetResourceGroupsOf() {
      AuthenticationService cs = new AuthenticationService();
      IEnumerable<DT.Resource> resGroups = cs.GetResourceGroupsOf(cl1.Id);
      Assert.AreEqual(2, resGroups.Count());
    }

    /// <summary>
    /// get Members
    /// </summary>
    [TestMethod]
    public void TestGetRootResources() {
      AuthenticationService cs = new AuthenticationService();
      IEnumerable<DT.Resource> rootResourceList = cs.GetRootResources();
      Assert.AreEqual(2, rootResourceList.Count());
    }

    #endregion //Testmethods
  }
}