namespace SeleniumBrowser
{
    using Newtonsoft.Json;
    using OpenQA.Selenium;
    using OpenQA.Selenium.Chrome;
    using SeleniumBrowser.Command;
    using System;
    using System.Collections.Concurrent;
    using System.Collections.Generic;
    using System.Diagnostics;
    using System.IO;
    using System.Linq;
    using System.Runtime.InteropServices;

    public class Commander
    {
        [DllImport("User32.dll")]
        static extern int SetForegroundWindow(IntPtr point);

        public const string FFMPEG_FILE = "ffmpeg.exe";

        public const string RECORD_FILE = "Record.mp4";


        private IWebDriver InitBrowser(BrowserInfo i_bi)
        {
            IWebDriver iwd = null;

            if (i_bi.Name.ToLower() == "chrome")
            {
                ChromeOptions options = new ChromeOptions();
                i_bi.Parameters.ForEach(sPara => options.AddArgument(sPara));
                iwd = new ChromeDriver(Environment.CurrentDirectory, options);
            }
            return iwd;
        }

        public string RunAction(BrowserInfo i_bi, List<CommandInfo> i_laiCmds,
      [System.Runtime.CompilerServices.CallerLineNumber] int i_nCodeLine = 0,
      [System.Runtime.CompilerServices.CallerMemberName] string i_sMemberName = null,
      [System.Runtime.CompilerServices.CallerFilePath] string i_sSourcePath = null)
        {
            string sMsg = null;


            CommanderGlobalData cgd = new CommanderGlobalData();

            if (!Directory.Exists(cgd.StotrFolder))
            {
                Directory.CreateDirectory(cgd.StotrFolder);
            }

            // Start Recording
            ProcessStartInfo startInfo = new ProcessStartInfo(FFMPEG_FILE)
            {
                WindowStyle = ProcessWindowStyle.Minimized
            };
            string sRecordPath = Path.Combine(cgd.StotrFolder, RECORD_FILE);
            // https://stackoverflow.com/questions/6766333/capture-windows-screen-with-ffmpeg
            // ffmpeg -y -rtbufsize 100M -f gdigrab -t 00:00:30 -framerate 30 -probesize 10M -draw_mouse 1 -i desktop -c:v libx264 -r 30 -preset ultrafast -tune zerolatency -crf 25 -pix_fmt yuv420p c:/video_comapre2.mp4

            startInfo.Arguments = makeRecordCommand(i_laiCmds.Sum(f => 2 + f.SleepAfterEvent), sRecordPath);
            Process.Start(startInfo);


            IWebDriver iwdBrowser = null;


            try
            {
                do
                {

                    iwdBrowser = InitBrowser(i_bi);
                    if (iwdBrowser == null)
                    {
                        sMsg = "NO_BROWSER";
                        break;
                    }



                    ConcurrentDictionary<string, object> cdGlobalData = new ConcurrentDictionary<string, object>();
                    foreach (CommandInfo ai in i_laiCmds)
                    {
                        ai.BatchProcessData = cgd;
#if DEBUG


                        System.Diagnostics.Debug.WriteLine($"Command={ai.Command} Target={ai.Target} title={iwdBrowser.CurrentWindowHandle}");
#endif
                        sMsg = ai.Process(iwdBrowser, ref cdGlobalData);

                        if (sMsg != null)
                        {
                            break;
                        }
                        cgd.CommandCount++;
                    }

                }
                while (false);
            }
            catch (Exception ex)
            {
                sMsg = $"{nameof(RunAction)} unhandle exception !. Call from {i_sMemberName} {i_sSourcePath}({i_nCodeLine}).";

#if DEBUG
                sMsg += ex.Message;
#endif
            }

#if DEBUG
            if (sMsg != null)
            {
                System.Diagnostics.Debug.WriteLine(sMsg);
            }
#endif
            if (iwdBrowser != null)
            {
                try
                {
                    iwdBrowser.Close();
                    iwdBrowser.Quit();
                }
                catch
                {
                    // Ignore
                }
            }




            return sMsg;
        }

        public string RunAction(BrowserInfo i_bi, string i_sJsonCommands,
            [System.Runtime.CompilerServices.CallerLineNumber] int i_nCodeLine = 0,
            [System.Runtime.CompilerServices.CallerMemberName] string i_sMemberName = null,
            [System.Runtime.CompilerServices.CallerFilePath] string i_sSourcePath = null)
        {
            return RunAction(i_bi, JsonConvert.DeserializeObject<List<CommandInfo>>(i_sJsonCommands), i_nCodeLine, i_sMemberName, i_sSourcePath);
        }

        protected string makeRecordCommand(int nRecordTime, string sRecordPath)
        {
            int nRecordSecondMod = nRecordTime % 60;
            int nRecordMinute = nRecordTime / 60;
            int nRecordMinuteMod = nRecordMinute % 60;
            int nHour = nRecordMinute / 60;

            return $"-y -rtbufsize 100M -f gdigrab -t {nHour:00}:{nRecordMinuteMod:00}:{nRecordSecondMod:00}  -framerate 30 -probesize 10M -draw_mouse 1 -i desktop -c:v libx264 -r 30 -preset ultrafast -tune zerolatency -crf 25 -pix_fmt yuv420p {sRecordPath}"; 

        }
      


    }
}