#region License Information
/* HeuristicLab 
 * Copyright (C) 2002-2010 Heuristic and Evolutionary Algorithms Laboratory (HEAL) 
 * 
 * This file is part of HeuristicLab. 
 * 
 * HeuristicLab is free software: you can redistribute it and/or modify 
 * it under the terms of the GNU General Public License as published by 
 * the Free Software Foundation, either version 3 of the License, or 
 * (at your option) any later version. 
 * 
 * HeuristicLab is distributed in the hope that it will be useful, 
 * but WITHOUT ANY WARRANTY; without even the implied warranty of 
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
 * GNU General Public License for more details. 
 * 
 * You should have received a copy of the GNU General Public License 
 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>. 
 */
#endregion

using System;
using System.Collections.Generic;
using System.Linq;
using System.ServiceModel;
using HeuristicLab.Services.Authentication.DataTransfer;
using HeuristicLab.Services.Authentication.DataAccess;
using System.Data.Linq;
using System.Diagnostics;

namespace HeuristicLab.Services.Authentication {
  [ServiceBehavior(IncludeExceptionDetailInFaults = true)]
  public class AuthenticationService : IAuthenticationService {

    #region User

    public DataTransfer.User GetUser(Guid id) {
      using (UserManagementDataContext db = new UserManagementDataContext()) {
        var user = db.aspnet_Users.FirstOrDefault(x => x.UserId == id);
        var membership = db.aspnet_Memberships.Where(x => x.UserId == id).FirstOrDefault();
        return Convert.ToDto(user, membership);
      }
    }

    public IEnumerable<User> GetUsers() {
      using (UserManagementDataContext db = new UserManagementDataContext()) {
        var users = db.aspnet_Users.OrderBy(x => x.UserId).ToList().Zip(db.aspnet_Memberships.OrderBy(x => x.UserId), (x, y) => Convert.ToDto(x, y));
        return users;
      }
    }


    public IEnumerable<User> GetUsersForApplication(Guid applicationId) {
      using (UserManagementDataContext db = new UserManagementDataContext()) {
        var users = db.aspnet_Users.Where(x => x.ApplicationId == applicationId).OrderBy(x => x.UserId).ToList().Zip(db.aspnet_Memberships.Where(x => x.ApplicationId == applicationId).OrderBy(x => x.UserId), (x, y) => Convert.ToDto(x, y)).ToArray();
        return users;
      }
    }


    public Guid AddUser(User user) {
      if (user != null) {
        using (UserManagementDataContext db = new UserManagementDataContext()) {
          aspnet_User eUser;
          aspnet_Membership eMembership;
          user.Id = Guid.NewGuid();
          Convert.ToEntity(user, out eUser, out  eMembership);
          db.aspnet_Users.InsertOnSubmit(eUser);
          db.aspnet_Memberships.InsertOnSubmit(eMembership);
          db.SubmitChanges();
          return user.Id;
        }
      }
      return Guid.Empty;

    }

    public void DeleteUser(Guid id) {
      using (UserManagementDataContext db = new UserManagementDataContext()) {
        var user = db.aspnet_Users.Where(x => x.UserId == id).FirstOrDefault();
        var membership = db.aspnet_Memberships.Where(x => x.UserId == id).FirstOrDefault();
        var userinroles = db.aspnet_UsersInRoles.Where(x => x.UserId == id).ToList<aspnet_UsersInRole>();
        db.aspnet_UsersInRoles.DeleteAllOnSubmit(userinroles);
        db.aspnet_Memberships.DeleteOnSubmit(membership);
        db.aspnet_Users.DeleteOnSubmit(user);
        db.SubmitChanges();
      }

    }


    public void UpdateUser(User user) {
      using (UserManagementDataContext db = new UserManagementDataContext()) {
        var eUser = db.aspnet_Users.Where(x => x.UserId == user.Id).FirstOrDefault();
        var eMembership = db.aspnet_Memberships.Where(x => x.UserId == user.Id).FirstOrDefault();
        Convert.ToEntity(user, eUser, eMembership);
        db.SubmitChanges();
      }
    }


    public void AddUserToRole(Guid roleId, Guid userId) {
      using (UserManagementDataContext db = new UserManagementDataContext()) {
        aspnet_UsersInRole r = new aspnet_UsersInRole();
        r.RoleId = roleId;
        r.UserId = userId;
        db.aspnet_UsersInRoles.InsertOnSubmit(r);
        db.SubmitChanges();
      }
    }



    public IEnumerable<Guid> GetUsersInRole(Guid roleId) {
      using (UserManagementDataContext db = new UserManagementDataContext()) {
        List<Guid> userList = new List<Guid>();
        var users = db.aspnet_UsersInRoles.Where(x => x.RoleId == roleId).ToList<aspnet_UsersInRole>();
        foreach (aspnet_UsersInRole u in users) {
          userList.Add(GetUser(u.UserId).Id);
        }
        return userList;
      }
    }


    public bool IsUserInRole(Guid userId, Guid roleId) {
      using (UserManagementDataContext db = new UserManagementDataContext()) {
        bool isInRole = false;
        var users = db.aspnet_UsersInRoles.Where(x => x.RoleId == roleId && x.UserId == userId).ToList<aspnet_UsersInRole>();
        foreach (aspnet_UsersInRole u in users) {
          isInRole = true;
        }
        return isInRole;
      }
    }


    public void RemoveUserFromRole(Guid roleId, Guid userId) {
      using (UserManagementDataContext db = new UserManagementDataContext()) {
        var role = db.aspnet_UsersInRoles.Where(x => x.RoleId == roleId && x.UserId == userId).FirstOrDefault();
        db.aspnet_UsersInRoles.DeleteOnSubmit(role);
        db.SubmitChanges();
      }
    }


    // TODO !!!
    public User ResetPassword(string applicationName, string userName, string password) {

      string salt = "";
      string answer = "";

      using (UserManagementDataContext db = new UserManagementDataContext()) {
        db.aspnet_Membership_ResetPassword(applicationName, userName, password, null, null, salt, null, null, answer);
        return null;
      }
    }

    #endregion

    #region Role

    public Role GetRole(Guid id) {
      using (UserManagementDataContext db = new UserManagementDataContext()) {
        var role = db.aspnet_Roles.Where(x => x.RoleId == id).FirstOrDefault();
        return Convert.ToDto(role);
      }
    }

    public IEnumerable<Role> GetRoles() {

      using (UserManagementDataContext db = new UserManagementDataContext()) {
        List<DataTransfer.Role> roleList = new List<DataTransfer.Role>();
        var roles = db.aspnet_Roles.ToList<aspnet_Role>();
        foreach (aspnet_Role role in roles) {
          roleList.Add(Convert.ToDto(role));
        }
        return roleList;
      }

    }

    public IEnumerable<Role> GetRolesForApplication(Guid applicationId) {
      using (UserManagementDataContext db = new UserManagementDataContext()) {
        List<Role> roleList = new List<Role>();
        var roles = db.aspnet_Roles.Where(x => x.ApplicationId == applicationId).ToList<aspnet_Role>();
        foreach (aspnet_Role role in roles) {
          roleList.Add(Convert.ToDto(role));
        }
        return roleList;
      }
    }

    public Guid AddRole(Role role) {
      if (role != null) {
        using (UserManagementDataContext db = new UserManagementDataContext()) {
          aspnet_Role eRole = new aspnet_Role();
          role.Id = Guid.NewGuid();
          Convert.ToEntity(role, eRole);
          db.aspnet_Roles.InsertOnSubmit(eRole);
          db.SubmitChanges();
          return role.Id;
        }
      }
      return Guid.Empty;
    }

    public void DeleteRole(Guid id) {
      using (UserManagementDataContext db = new UserManagementDataContext()) {
        var role = db.aspnet_Roles.Where(x => x.RoleId == id).FirstOrDefault();
        var userinroles = db.aspnet_UsersInRoles.Where(x => x.RoleId == id).ToList<aspnet_UsersInRole>();
        db.aspnet_UsersInRoles.DeleteAllOnSubmit(userinroles);
        db.aspnet_Roles.DeleteOnSubmit(role);
        db.SubmitChanges();
      }
    }

    public IEnumerable<Guid> GetRolesForUser(Guid userId) {
      using (UserManagementDataContext db = new UserManagementDataContext()) {
        List<Guid> roleList = new List<Guid>();
        var roles = db.aspnet_UsersInRoles.Where(x => x.UserId == userId).ToList<aspnet_UsersInRole>();
        foreach (aspnet_UsersInRole r in roles) {
          roleList.Add(GetRole(r.RoleId).Id);
        }
        return roleList;
      }
    }

    public void UpdateRole(Role role) {
      using (UserManagementDataContext db = new UserManagementDataContext()) {
        var eRole = db.aspnet_Roles.Where(x => x.RoleId == role.Id).FirstOrDefault();
        Convert.ToEntity(role, eRole);
        db.SubmitChanges();
      }
    }

    #endregion

    #region Application

    public Guid AddApplication(Application application) {
      if (application != null) {
        using (UserManagementDataContext db = new UserManagementDataContext()) {
          aspnet_Application eApplication = new aspnet_Application();
          application.Id = Guid.NewGuid();
          Convert.ToEntity(application, eApplication);
          db.aspnet_Applications.InsertOnSubmit(eApplication);
          db.SubmitChanges();
          return application.Id;
        }
      }
      return Guid.Empty;
    }

    public void UpdateApplication(Application application) {
      using (UserManagementDataContext db = new UserManagementDataContext()) {
        var eApplication = db.aspnet_Applications.Where(x => x.ApplicationId == application.Id).FirstOrDefault();
        Convert.ToEntity(application, eApplication);
        db.SubmitChanges();
      }
    }


    public void DeleteApplication(Guid applicationId) {
      using (UserManagementDataContext db = new UserManagementDataContext()) {
        var users = db.aspnet_Users.Where(x => x.ApplicationId == applicationId).ToList<aspnet_User>();
        var memberships = db.aspnet_Memberships.Where(x => x.ApplicationId == applicationId).ToList<aspnet_Membership>();
        var roles = db.aspnet_Roles.Where(x => x.ApplicationId == applicationId).ToList<aspnet_Role>();
        var application = db.aspnet_Applications.Where(x => x.ApplicationId == applicationId).FirstOrDefault();
        foreach (aspnet_User u in users) {
          var userinroles = db.aspnet_UsersInRoles.Where(x => x.UserId == u.UserId).ToList<aspnet_UsersInRole>();
          db.aspnet_UsersInRoles.DeleteAllOnSubmit(userinroles);
        }
        db.aspnet_Memberships.DeleteAllOnSubmit(memberships);
        db.aspnet_Users.DeleteAllOnSubmit(users);
        db.aspnet_Roles.DeleteAllOnSubmit(roles);
        db.aspnet_Applications.DeleteOnSubmit(application);
        db.SubmitChanges();
      }
    }

    public Application GetApplication(Guid id) {
      using (UserManagementDataContext db = new UserManagementDataContext()) {
        var application = db.aspnet_Applications.Where(x => x.ApplicationId == id).FirstOrDefault();
        return Convert.ToDto(application);
      }
    }

    public IEnumerable<Application> GetApplications() {
      List<Application> applicationList = new List<Application>();
      using (UserManagementDataContext db = new UserManagementDataContext()) {
        var apps = db.aspnet_Applications.ToList<aspnet_Application>();
        foreach (aspnet_Application app in apps) {
          applicationList.Add(Convert.ToDto(app));
        }
      }
      return applicationList;
    }
    #endregion
  }
}