using System;
using System.ComponentModel;
using System.Net;
using System.Runtime.InteropServices;
using System.Runtime.Versioning;
using System.Security.AccessControl;
using BOOL = System.Boolean;
using DWORD = System.UInt32;
using LPWSTR = System.String;
using NET_API_STATUS = System.UInt32;

namespace Integrations.Packing_Slips
{

    public class UNCAccess : IDisposable
    {
        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
        internal struct USE_INFO_2
        {
            internal LPWSTR ui2_local;
            internal LPWSTR ui2_remote;
            internal LPWSTR ui2_password;
            internal DWORD ui2_status;
            internal DWORD ui2_asg_type;
            internal DWORD ui2_refcount;
            internal DWORD ui2_usecount;
            internal LPWSTR ui2_username;
            internal LPWSTR ui2_domainname;
        }
        [DllImport("NetApi32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
        internal static extern NET_API_STATUS NetUseAdd(
        LPWSTR UncServerName,
        DWORD Level,
        ref USE_INFO_2 Buf,
        out DWORD ParmError);
        [DllImport("NetApi32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
        internal static extern NET_API_STATUS NetUseDel(
        LPWSTR UncServerName,
        LPWSTR UseName,
        DWORD ForceCond);
        private string sUNCPath;
        private string sUser;
        private string sPassword;
        private string sDomain;
        private int iLastError;
        public UNCAccess()
        {
        }
        public UNCAccess(string UNCPath, string User, string Domain, string Password)
        {
            login(UNCPath, User, Domain, Password);
        }
        public int LastError
        {
            get { return iLastError; }
        }
        ///

        /// Connects to a UNC share folder with credentials
        ///
        /// UNC share path
        /// Username
        /// Domain
        /// Password
        /// True if login was successful
        public bool login(string UNCPath, string User, string Domain, string Password)
        {
            sUNCPath = UNCPath;
            sUser = User;
            sPassword = Password;
            sDomain = Domain;
            return NetUseWithCredentials();
        }
        private bool NetUseWithCredentials()
        {
            uint returncode;
            try
            {
                USE_INFO_2 useinfo = new USE_INFO_2();

                useinfo.ui2_remote = sUNCPath;
                useinfo.ui2_username = sUser;
                useinfo.ui2_domainname = sDomain;
                useinfo.ui2_password = sPassword;
                useinfo.ui2_asg_type = 0;
                useinfo.ui2_usecount = 1;
                uint paramErrorIndex;
                returncode = NetUseAdd(null, 2, ref useinfo, out paramErrorIndex);
                iLastError = (int)returncode;
                return returncode == 0;
            }
            catch
            {
                iLastError = Marshal.GetLastWin32Error();
                return false;
            }
        }
        ///

        /// Closes the UNC share
        ///
        /// True if closing was successful
        public bool NetUseDelete()
        {
            uint returncode;
            try
            {
                returncode = NetUseDel(null, sUNCPath, 2);
                iLastError = (int)returncode;
                return (returncode == 0);
            }
            catch
            {
                iLastError = Marshal.GetLastWin32Error();
                return false;
            }
        }

        public void Dispose()
        {
            NetUseDelete();
            GC.SuppressFinalize(this);
        }
    }

}