using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Yaulw.Process;
using System.IO;
using Yaulw.Tools;
using System.Diagnostics;
using Yaulw.Other;

namespace Yaulw.Installer
{
    public static class Common
    {

        #region Setup / Spawners

        /// <summary>
        /// Spawn a Setup Process (Setup.exe for example)
        /// </summary>
        public static void PSetupSpwan(string SetupFileNameNPath, string param_s, bool bWait)
        {
            try
            {
                if (!String.IsNullOrEmpty(SetupFileNameNPath) && Tools.PathNaming.FileNameIsValid(System.IO.Path.GetFileName(SetupFileNameNPath)))
                {
                    //string dir = Tools.PathNaming.MakeDirectoryPathValid(System.IO.Path.GetDirectoryName(SetupFileNameNPath));
                    //SetupFileNameNPath = dir + System.IO.Path.DirectorySeparatorChar + System.IO.Path.GetFileName(SetupFileNameNPath);

                    //if (!String.IsNullOrEmpty(param_s))
                    //{
                    //    CMDline cmd = new CMDline(null, null);
                    //    bool bIsValidParse = cmd.Parse(param_s.Split(' '), false);
                    //    if (bIsValidParse)
                    //        param_s = cmd.MakeValidCmdStrFromNewlyParsedCmdLine();
                    //    else
                    //        return; // Invalid Parameters passed in that could cause OS Command Injection
                    //}
                    PStarter.StartProcess(PStartInfo.CreateProcess(SetupFileNameNPath, param_s, "", true, System.Diagnostics.ProcessWindowStyle.Hidden, false), bWait, false);
                }
            }
            catch (Exception e) { throw e; }
        }

        /// <summary>
        /// Spawn a Setup Process (Setup.exe for example) using shell execute
        /// </summary>
        public static void PSetupSpwanShell(string SetupFileNameNPath, string param_s, bool bWait)
        {
            try
            {
                if (!String.IsNullOrEmpty(SetupFileNameNPath) && Tools.PathNaming.FileNameIsValid(System.IO.Path.GetFileName(SetupFileNameNPath)))
                {
                    //string dir = Tools.PathNaming.MakeDirectoryPathValid(System.IO.Path.GetDirectoryName(SetupFileNameNPath));
                    //SetupFileNameNPath = dir + System.IO.Path.DirectorySeparatorChar + System.IO.Path.GetFileName(SetupFileNameNPath);

                    //if (!String.IsNullOrEmpty(param_s))
                    //{
                    //    CMDline cmd = new CMDline(null, null);
                    //    bool bIsValidParse = cmd.Parse(param_s.Split(' '), false);
                    //    if (bIsValidParse)
                    //        param_s = cmd.MakeValidCmdStrFromNewlyParsedCmdLine();
                    //    else
                    //        return; // Invalid Parameters passed in that could cause OS Command Injection
                    //}
                    PStarter.StartProcess(PStartInfo.CreateProcess(SetupFileNameNPath, param_s, "", true, System.Diagnostics.ProcessWindowStyle.Hidden, true), bWait, false);
                }
            }
            catch (Exception e) { throw e; }
        }

        /// <summary>
        /// Spawn a MSI Setup Process (*.msi)
        /// </summary>
        public static void PSetupMSIEXEC(string param_s)
        {
            try
            { 
                string msiexec = System.Environment.GetFolderPath(Environment.SpecialFolder.System) + "\\msiexec.exe";
                if (System.IO.File.Exists(msiexec))
                {
                    //if (!String.IsNullOrEmpty(param_s))
                    //{
                    //    CMDline cmd = new CMDline(null, null);
                    //    bool bIsValidParse = cmd.Parse(param_s.Split(' '), false);
                    //    if (bIsValidParse)
                    //        param_s = cmd.MakeValidCmdStrFromNewlyParsedCmdLine();
                    //    else
                    //        return; // Invalid Parameters passed in that could cause OS Command Injection
                    //}
                    PStarter.StartProcess(PStartInfo.CreateProcess(msiexec, param_s, "", true, System.Diagnostics.ProcessWindowStyle.Hidden, false), true, false);
                }
            }
            catch (Exception e) { throw e; }
        }

        /// <summary>
        /// Run a command on the commandline * Hidden *
        /// </summary>
        /// <param name="cmdline">cmd to run</param>
        public static string RunCmdLine(string cmdline)
        {
            string result = PStarter.RunDosCommand(cmdline);
            return result;
        }

        #endregion

        #region Service (ServiceW Repeat with Check Existence)

        /// <summary>
        /// Stop a service
        /// </summary>
        /// <param name="ServiceName">name of service to stop</param>
        /// <returns>true if successful, false otherwise</returns>
        public static bool StopService(string ServiceName)
        {
            bool bSuccess = true;
            if (ServiceW.DoesServiceExist(ServiceName))
                bSuccess = ServiceW.StopService(ServiceName, true, 120);
            return bSuccess;
        }

        /// <summary>
        /// Stop a service
        /// </summary>
        /// <param name="ServiceName">name of service to stop</param>
        /// <returns>true if successful, false otherwise</returns>
        public static bool StopService(string ServiceName, int nTimeoutBeforeKill)
        {
            bool bSuccess = true;
            if (ServiceW.DoesServiceExist(ServiceName))
                bSuccess = ServiceW.StopService(ServiceName, true, nTimeoutBeforeKill);
            return bSuccess;
        }

        /// <summary>
        /// start a service
        /// </summary>
        /// <param name="ServiceName">name of a service to start</param>
        /// <returns>true if successful, false otherwise</returns>
        public static bool StartService(string ServiceName)
        {
            bool bSuccess = true;
            if (ServiceW.DoesServiceExist(ServiceName))
                bSuccess = ServiceW.StartService(ServiceName, 120);
            return bSuccess;
        }

        /// <summary>
        /// Does Service Exist
        /// </summary>
        /// <param name="ServiceName">Name of service to check</param>
        /// <returns>true if successful, false otherwise</returns>
        public static bool ServiceExists(string ServiceName)
        {
            return ServiceW.DoesServiceExist(ServiceName);
        }

        #endregion

        #region Windows Utils

        /// <summary>
        /// Use this to get the complete path to a .net framework utility like gacutil.exe or 
        /// installutil.exe.. any .net framework utility. Will fall back to look in the %temp% folder,
        /// if not found, giving the opportunity to deploy the util directly with the components
        /// </summary>
        /// <param name="UtilFileName">the utility in .net you are looking for like gacutil.exe</param>
        /// <returns>the full filenameNpath or "", if no existing file found</returns>
        public static string GetNetFrameworkUtilFileNameNPathFile(string UtilFileName)
        {
            string windir = System.Environment.GetEnvironmentVariable("windir", EnvironmentVariableTarget.Machine);
            string NetFramework1_0 = windir + "\\Microsoft.Net\\Framework\\v1.0.3705";
            string NetFramework1_1 = windir + "\\Microsoft.Net\\Framework\\v1.1.4322";
            string NetFramework2_0 = windir + "\\Microsoft.Net\\Framework\\v2.0.50727";
            string NetFramework3_0 = windir + "\\Microsoft.Net\\Framework\\v3.0";
            string NetFramework3_5 = windir + "\\Microsoft.Net\\Framework\\v3.5";
            string NetFramework4_0 = windir + "\\Microsoft.Net\\Framework\\v4.0.30319";
            string TempPath = PathNaming.PathEndsWithNoSlash(Path.GetTempPath()); // We use this as a Fallback, in case file doesn't exist in the framework
            string[] Frameworks = new string[] { NetFramework2_0, NetFramework4_0, NetFramework1_0, NetFramework1_1, NetFramework3_0, NetFramework3_5, TempPath };

            string NetUtilFileNameNPath = "";
            foreach (string framework in Frameworks)
            {
                if (System.IO.File.Exists(framework + "\\" + UtilFileName))
                {
                    NetUtilFileNameNPath = framework + "\\" + UtilFileName;
                    return NetUtilFileNameNPath;
                }
            };
            return NetUtilFileNameNPath;
        }

        /// <summary>
        /// Quick Helper to get the Program Files Path for the specific system
        /// </summary>
        /// <returns>Program Files path with a '/' at the end</returns>
        public static string GetProgramFilesPathOnSystemWithEndSlash()
        {
            string ProgramFiles = System.Environment.GetEnvironmentVariable("ProgramFiles(x86)");
            if (String.IsNullOrEmpty(ProgramFiles))
                ProgramFiles = System.Environment.GetEnvironmentVariable("ProgramFiles");
            return PathNaming.PathEndsWithSlash(ProgramFiles);
        }

        /// <summary>
        /// 
        /// </summary>
        /// <returns></returns>
        public static string SetOwnership()
        {
            // in order to do any of this, sadly, we must first install the windows resource kit
            //subinacl /subdirectories *.* /setowner=domainname\user
            return String.Empty;
        }

        /// <summary>
        /// To grant the specified User or group Full Control permissions to the folder and its contents
        /// </summary>
        /// <param name="FolderNPath">full path to folder/directory</param>
        /// <param name="UserOrGroup">domainname\administrator, any windows user or group</param>
        /// <returns></returns>
        public static bool GrantFullPermissionToFolderForUserOrGroup(string FolderNPath, string UserOrGroup)
        {
            if (Directory.Exists(FolderNPath))
            {
                string command = String.Format("cacls \"{0}\" /t /e /g {1}:f", FolderNPath, UserOrGroup);
                if (command.Contains("Invalid arguments."))
                    return false;
                else
                    return true;
            }
            return false;
        }

        #endregion

        #region Windows Commands

        /// <summary>
        /// Get The System up Time, important because we need SQL Server and Advantage up and running before
        /// doing anything
        /// </summary>
        /// <returns></returns>
        public static TimeSpan GetSystemUpTime()
        {
            string Result = Yaulw.Installer.Common.RunCmdLine("net statistics server");
            int n = Result.IndexOf("Sessions accepted");
            if (n != -1)
            {
                Result = Result.Substring(0, n);
                n = Result.IndexOf("Statistics since ");
                if (n != -1)
                {
                    Result = Result.Substring(n + "Statistics since ".Length);
                    Result = Result.Replace("\n", "");
                    Result = Result.Replace("\r", "");

                    DateTime BootTime;
                    if (DateTime.TryParse(Result, out BootTime))
                        return (DateTime.Now - BootTime);
                }
            }

            // Something went wrong with the first approach, 
            // let's try another...
            using (var uptime = new PerformanceCounter("System", "System Up Time"))
            {
                uptime.NextValue();       //Call this an extra time before reading its value
                return TimeSpan.FromSeconds(uptime.NextValue());
            }
        }

        /// <summary>
        /// Use this to create a quick File Shortcut on the system using ShellLink (File Only)
        /// </summary>
        /// <param name="TargetFileNameNPath">A valid File on the system to point to (not a url) i believe url's are created differently</param>
        /// <param name="LnkFileNameNPath">a valid .lnk file name and location where to put the shortcut</param>
        public static void CreateFileShortcut(string TargetFileNameNPath, string LnkFileNameNPath)
        {
            if (String.IsNullOrEmpty(TargetFileNameNPath) || String.IsNullOrEmpty(LnkFileNameNPath))
                return;

            if (!System.IO.File.Exists(TargetFileNameNPath))
                return;

            if (System.IO.File.Exists(LnkFileNameNPath))
                System.IO.File.Delete(LnkFileNameNPath);

            using (ShellLink shortcut = new ShellLink())
            {
                shortcut.Target = TargetFileNameNPath;
                shortcut.WorkingDirectory = Path.GetDirectoryName(TargetFileNameNPath);
                shortcut.DisplayMode = ShellLink.LinkDisplayMode.edmNormal;
                shortcut.Description = ""; // doesn't appear to do anything
                shortcut.Save(LnkFileNameNPath);
            }
        }

        #endregion

        #region Resource Extraction

        /// <summary>
        /// Extract a Binary Resource from a stream and write it to a file
        /// </summary>
        /// <param name="resourceStream"></param>
        /// <param name="FileNameNPath"></param>
        /// <param name="bForceWrite"></param>
        /// <returns></returns>
        public static bool ExtractResourceStreamToFile(Stream resourceStream, string FileNameNPath, bool bForceWrite)
        {
            if (resourceStream != null && !String.IsNullOrEmpty(FileNameNPath))
            {
                if (bForceWrite || !System.IO.File.Exists(FileNameNPath))
                {

                    try
                    {
                        using (resourceStream)
                        using (BinaryReader br = new BinaryReader(resourceStream))
                        using (BinaryWriter bw = new BinaryWriter(new FileStream(FileNameNPath, FileMode.Create)))
                        {
                            byte[] buffer = new byte[64 * 1024];
                            int numread = br.Read(buffer, 0, buffer.Length);
                            while (numread > 0)
                            {
                                bw.Write(buffer, 0, numread);
                                numread = br.Read(buffer, 0, buffer.Length);
                            }
                            bw.Flush();
                        }
                        return true;
                    }
                    catch (Exception) { /* ignore */ }
                }
            }
            return false;
        }

        #endregion
    }
}