using System;
using Tanshu.Accounts.Contracts;

namespace Tanshu.Accounts.BI
{
    public class MembershipBI
    {
        public bool ValidateUser(string name, string password)
        {
            using (var connection = new SqlDAO.SqlConnectionDAO())
            {
                using (var dao = new SqlDAO.MembershipDAO(connection))
                {
                    return dao.ValidateUser(name, password);
                }
            }
        }

        public void AddUsersToRoles(string[] usernames, string[] roleNames)
        {
            
            using (var connection = new SqlDAO.SqlConnectionDAO())
            {
                using (var dao = new SqlDAO.MembershipDAO(connection))
                {
                    dao.AddUsersToRoles(usernames, roleNames);
                }
            }
        }

        public string[] GetAllRoles()
        {
            
            using (var connection = new SqlDAO.SqlConnectionDAO())
            {
                using (var dao = new SqlDAO.MembershipDAO(connection))
                {
                    return dao.GetAllRoles();
                }
            }
        }

        public string[] GetRolesForUser(string username)
        {
            
            using (var connection = new SqlDAO.SqlConnectionDAO())
            {
                using (var dao = new SqlDAO.MembershipDAO(connection))
                {
                    return dao.GetRolesForUser(username);
                }
            }
        }

        public bool IsUserInRole(string username, string roleName)
        {
            
            using (var connection = new SqlDAO.SqlConnectionDAO())
            {
                using (var dao = new SqlDAO.MembershipDAO(connection))
                {
                    if (!dao.RoleExists(roleName))
                        throw new Exception(string.Format("Role {0} does not exist in the database", roleName));
                    return dao.IsUserInRole(username, roleName);
                }
            }
        }

        public bool IsUserInRole(Guid userID, string roleName)
        {
            
            using (var connection = new SqlDAO.SqlConnectionDAO())
            {
                using (var dao = new SqlDAO.MembershipDAO(connection))
                {
                    if (!dao.RoleExists(roleName))
                        throw new Exception(string.Format("Role {0} does not exist in the database", roleName));
                    return dao.IsUserInRole(userID, roleName);
                }
            }
        }

        public void RemoveUsersFromRoles(string[] usernames, string[] roleNames)
        {
            if ((roleNames.Length > 0) || (usernames.Length > 0))
            {
                
                using (var connection = new SqlDAO.SqlConnectionDAO())
                {
                    using (var dao = new SqlDAO.MembershipDAO(connection))
                    {
                        dao.RemoveUsersFromRoles(usernames, roleNames);
                    }
                }
            }
        }

        public UserBO GetUserFromName(string name)
        {
            
            using (var connection = new SqlDAO.SqlConnectionDAO())
            {
                using (var dao = new SqlDAO.MembershipDAO(connection))
                {
                    return dao.GetUserFromName(name);
                }
            }
        }
    }
}