using System;
using System.Collections.Generic;
using System.Text;

using System.Runtime.InteropServices;
namespace GeneratorService
{


    /// <summary>
    /// Summary description for ServiceInstaller.
    /// </summary>
    class ServiceInstaller
    {
        #region Private Variables
        //private string _servicePath;
        //private string _serviceName;
        //private string _serviceDisplayName;
        #endregion Private Variables
        #region DLLImport
        [DllImport("advapi32.dll")]
        public static extern IntPtr OpenSCManager(string lpMachineName, string lpSCDB, int scParameter);
        [DllImport("Advapi32.dll")]
        public static extern IntPtr CreateService(IntPtr SC_HANDLE, string lpSvcName, string lpDisplayName,
        int dwDesiredAccess, int dwServiceType, int dwStartType, int dwErrorControl, string lpPathName,
        string lpLoadOrderGroup, int lpdwTagId, string lpDependencies, string lpServiceStartName, string lpPassword);
        [DllImport("advapi32.dll")]
        public static extern void CloseServiceHandle(IntPtr SCHANDLE);
        [DllImport("advapi32.dll")]
        public static extern int StartService(IntPtr SVHANDLE, int dwNumServiceArgs, string lpServiceArgVectors);
        [DllImport("advapi32.dll", SetLastError = true)]
        public static extern IntPtr OpenService(IntPtr SCHANDLE, string lpSvcName, int dwNumServiceArgs);
        [DllImport("advapi32.dll")]
        public static extern int DeleteService(IntPtr SVHANDLE);
        [DllImport("kernel32.dll")]
        public static extern int GetLastError();
        #endregion DLLImport
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        #region Main method + testing code
//        [STAThread]
//        static void Main(string[] args)
//{
//// TODO: Add code to start application here
//#region Testing
//// Testing --------------
//string svcPath;
//string svcName;
//string svcDispName;
////path to the service that you want to install
//svcPath = @"C:\build\service\Debug\Service.exe";
//svcDispName="Service Display Name";
//svcName= "Service Name";
//ServiceInstaller c = new ServiceInstaller();
//c.InstallService(svcPath, svcName, svcDispName);
//Console.Read();
//Testing --------------
//#endregion Testing
//}
        #endregion Main method + testing code - Commented
        /// <summary>
        /// This method installs and runs the service in the service control manager.
        /// </summary>
        /// <param name="svcPath">The complete path of the service.</param>
        /// <param name="svcName">Name of the service.</param>
        /// <param name="svcDispName">Display name of the service.</param>
        /// <returns>True if the process went thro successfully. False if there was any error.</returns>
        public bool InstallService(string svcPath, string svcName, string svcDispName)
        {
            #region Constants declaration.
            int SC_MANAGER_CREATE_SERVICE = 0x0002;
            int SERVICE_WIN32_OWN_PROCESS = 0x00000010;
            //int SERVICE_DEMAND_START = 0x00000003;
            int SERVICE_ERROR_NORMAL = 0x00000001;
            int STANDARD_RIGHTS_REQUIRED = 0xF0000;
            int SERVICE_QUERY_CONFIG = 0x0001;
            int SERVICE_CHANGE_CONFIG = 0x0002;
            int SERVICE_QUERY_STATUS = 0x0004;
            int SERVICE_ENUMERATE_DEPENDENTS = 0x0008;
            int SERVICE_START = 0x0010;
            int SERVICE_STOP = 0x0020;
            int SERVICE_PAUSE_CONTINUE = 0x0040;
            int SERVICE_INTERROGATE = 0x0080;
            int SERVICE_USER_DEFINED_CONTROL = 0x0100;
            int SERVICE_ALL_ACCESS = (STANDARD_RIGHTS_REQUIRED |
            SERVICE_QUERY_CONFIG |
            SERVICE_CHANGE_CONFIG |
            SERVICE_QUERY_STATUS |
            SERVICE_ENUMERATE_DEPENDENTS |
            SERVICE_START |
            SERVICE_STOP |
            SERVICE_PAUSE_CONTINUE |
            SERVICE_INTERROGATE |
            SERVICE_USER_DEFINED_CONTROL);
            int SERVICE_AUTO_START = 0x00000002;
            #endregion Constants declaration.
            try
            {
                if (svcPath.Contains(" "))
                    svcPath = "\"" + svcPath + "\"";
                IntPtr sc_handle = OpenSCManager(null, null, SC_MANAGER_CREATE_SERVICE);
                if (sc_handle.ToInt32() != 0)
                {
                    IntPtr sv_handle = CreateService(sc_handle, svcName, svcDispName, SERVICE_ALL_ACCESS, SERVICE_WIN32_OWN_PROCESS, SERVICE_AUTO_START, SERVICE_ERROR_NORMAL, svcPath, null, 0, null, null, null);

                    //IntPtr sv_handle = CreateService(sc_handle, svcName, svcDispName, SERVICE_ALL_ACCESS, SERVICE_WIN32_OWN_PROCESS, SERVICE_AUTO_START, SERVICE_ERROR_NORMAL, svcPath, null, 0, null, svcUserName, svcPassword);


                    if (sv_handle.ToInt32() == 0)
                    {
                        Console.WriteLine("Error on CreateService: " + GetLastError().ToString());
                        CloseServiceHandle(sc_handle);
                       
                        return false;
                    }
                    else
                    {
                        ////now trying to start the service
                        //int i = StartService(sv_handle, 0, null);
                        //// If the value i is zero, then there was an error starting the service.
                        //// note: error may arise if the service is already running or some other problem.
                        //if (i == 0)
                        //{
                        //    //Console.WriteLine("Couldnt start service");
                        //    return false;
                        //}
                        //Console.WriteLine("Success");
                        CloseServiceHandle(sc_handle);
                        return true;
                    }
                }
                else
                {
                    Console.WriteLine("Error on OpenSCManager for create: " + GetLastError().ToString());
                    return false;
                }
            }
            catch (Exception e)
            {
                throw e;
            }
        }
        /// <summary>
        /// This method uninstalls the service from the service conrol manager.
        /// </summary>
        /// <param name="svcName">Name of the service to uninstall.</param>
        public bool UnInstallService(string svcName)
        {
            int GENERIC_WRITE = 0x40000000;
            IntPtr sc_hndl = OpenSCManager(null, null, GENERIC_WRITE);
            if (sc_hndl.ToInt32() != 0)
            {
                int DELETE = 0x10000;
                IntPtr svc_hndl = OpenService(sc_hndl, svcName, DELETE);
                //Console.WriteLine(svc_hndl.ToInt32());
               
                if (svc_hndl.ToInt32() != 0)
                {
                    int i = DeleteService(svc_hndl);
                    if (i != 0)
                    {
                        CloseServiceHandle(sc_hndl);
                        return true;
                    }
                    else
                    {
                        Console.WriteLine("Error in DeleteService: " + GetLastError().ToString());
                        CloseServiceHandle(sc_hndl);
                        
                        return false;
                    }
                }
                else
                {
                    Console.WriteLine("Error in OpenSCManager for delete: " + GetLastError().ToString());
                    return false;
                }
            }
            else
                return false;
        }
    }

}