using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Diagnostics;
using System.Text.RegularExpressions;

namespace UIB_Tool_R10
{
    public partial class Form1 : Form
    {

        public string mainFile;
        public string outDir;
        public string[] scripts;

        public Form1()
        {
            InitializeComponent();
            mainFile = @"C:\Users\may\Desktop\Analysis\Tool_new\Deposit Data R9\ESS9_DE_ms_v1.sav";
            outDir = @"C:\Users\may\Desktop";
            scripts = new string[99];

            getScripts();
            prepPaths();

        }

        private void prepPaths()
        {
            String myDir = Directory.GetCurrentDirectory();
            String text;

            // set up paths in config file
            if (File.Exists(myDir + "\\R\\App\\miktex\\texmfs\\config\\fontconfig\\config\\fonts.conf"))
            {
                File.Delete(myDir + "\\R\\App\\miktex\\texmfs\\config\\fontconfig\\config\\fonts.conf");
            }

            if (File.Exists(myDir + "\\R\\App\\miktex\\texmfs\\config\\fontconfig\\config\\localfonts.conf"))
            {
                File.Delete(myDir + "\\R\\App\\miktex\\texmfs\\config\\fontconfig\\config\\localfonts.conf");
            }

            text = File.ReadAllText(myDir + "\\R\\App\\miktex\\texmfs\\config\\fontconfig\\config\\fonts_clean.conf");
            File.WriteAllText(myDir + "\\R\\App\\miktex\\texmfs\\config\\fontconfig\\config\\fonts.conf", text.Replace("MY_DIR", myDir));

            text = File.ReadAllText(myDir + "\\R\\App\\miktex\\texmfs\\config\\fontconfig\\config\\localfonts_clean.conf");
            File.WriteAllText(myDir + "\\R\\App\\miktex\\texmfs\\config\\fontconfig\\config\\localfonts.conf", text.Replace("MY_DIR", myDir));


        }

        private void getScripts()
        {
            Console.WriteLine("Looking for scripts...");
            int idx = 0;

            string[] files = System.IO.Directory.GetFiles(Directory.GetCurrentDirectory() + "\\Tool_files", "*.script");
            foreach (String fn in files)
            {
                String line;
                Console.WriteLine("...found " + fn);

                using (System.IO.StreamReader file = new System.IO.StreamReader(fn))
                {
                    while ((line = file.ReadLine()) != null)
                    {
                        if (line.Contains("title:"))
                        {
                            c_script.Items.Add(line.ToString().Split(':')[1].Replace("\"", ""));
                            //scripts[idx] = fn.ToString();
                        }
                        else if (line.Contains("script:"))
                        {
                            scripts[idx] = line.ToString().Split(':')[1].Replace("\"", "").Trim();
                        }
                    }
                }
                c_script.SelectedIndex = 0;
                Console.WriteLine("Filename: " + fn);
                idx++;
            }
            Console.WriteLine("Finished searching");
        }

        private void _mainFileSelector_Click(object sender, EventArgs e)
        {
            OpenFileDialog openFileDialog1 = new OpenFileDialog
            {
                //    InitialDirectory = @"C:\",
                Title = "Browse data Files",

                CheckFileExists = true,
                CheckPathExists = true,

                DefaultExt = "txt",
                Filter = "SPSS, Stata, SAS or CSV data (*.sav;*.dta;*.sas7bdat;*.csv)|*.sav;*.dta;*.sas7bdat;*.csv",
                FilterIndex = 2,
                RestoreDirectory = true,

                ReadOnlyChecked = true,
                ShowReadOnly = true
            };

            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                t_mainFile.Text = openFileDialog1.FileName;
                this.mainFile = openFileDialog1.FileName;

                this.checkData();
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void label1_Click(object sender, EventArgs e)
        {

        }

        private void label2_Click(object sender, EventArgs e)
        {

        }

        private void label1_Click_1(object sender, EventArgs e)
        {

        }

        private void _outdirSelector_Click(object sender, EventArgs e)
        {
            FolderBrowserDialog outDir = new FolderBrowserDialog();
            if (outDir.ShowDialog() == DialogResult.OK)
            {
                t_outdir.Text = outDir.SelectedPath;
                this.outDir = outDir.SelectedPath;
                this.checkData();
            }

        }

        private void checkData()
        {
            if (this.mainFile != "" && this.outDir != "" &&
                File.Exists(this.mainFile) && Directory.Exists(this.outDir))
            {
                b_generate.Enabled = true;
            }
            else
            {
                b_generate.Enabled = false;
            }
        }

        private void b_generate_Click(object sender, EventArgs e)
        {

            string scriptFile = GetScriptFile();
            if (scriptFile == "0")
            {
                return;
            }

            // zamrzni
            dtb.Text = "Please wait, generating report...";
            b_generate.Enabled = false;

            // First, remove log file (if it exists)
            if (File.Exists(outDir + "\\error.log"))
            {
                try
                {
                    File.Delete(outDir + "\\error.log");
                }
                catch
                {

                }
            }

            String dir = Directory.GetCurrentDirectory() + "\\";

            // odkomentiraj spodnjo vrstico
            int res = ExecuteCommand(dir.Replace(" ", "^ ") + "R\\App\\R-portable\\bin\\R -e \"Sys.setenv(R_LIBS_USER='');  .libPaths('');  Sys.setenv(PATH = paste('', '" + dir.Replace("\\", "/") + "R/App/miktex/texmfs/install/miktex/bin/x64/', sep =.Platform$path.sep)); Sys.setenv(RSTUDIO_PANDOC = '" + dir.Replace("\\", "/") + "R/App/pandoc');  rmarkdown::render('" + scriptFile + "', params=list(mainFile = \'" + mainFile.Replace("\\", "/") + "\'),output_file = '" + outDir.Replace("\\", "/").Replace(" ", "\\ ") + "/Report.pdf')\"", outDir + "\\error.log");
            Console.WriteLine(dir.Replace(" ", "^ ") + "R\\App\\R-portable\\bin\\R -e \"Sys.setenv(R_LIBS_USER='');  .libPaths('');  Sys.setenv(PATH = paste('', '" + dir.Replace("\\", "/") + "R/App/miktex/texmfs/install/miktex/bin/x64/', sep =.Platform$path.sep)); Sys.setenv(RSTUDIO_PANDOC = '" + dir.Replace("\\", "/") + "R/App/pandoc'); rmarkdown::render('" + scriptFile + "', params=list(mainFile = \'" + mainFile.Replace("\\", "/") + "\'),output_file = '" + outDir.Replace("\\", "/").Replace(" ", "\\ ") + "/Report.pdf')\"");
            if (res == 0)
            {
                dtb.Text = "Report generated!";
                if (c_autoOpen.SelectedIndex == 0)
                {
                    System.Diagnostics.Process.Start(outDir.Replace(" ", "\\ ") + "\\Report.pdf");
                }
            }
            else
            {
                dtb.Text = "There has been an error while  generating the report...";
                System.Windows.Forms.MessageBox.Show("There has been an error. Please contact your CC and send them 'error.log' from the output folder so they will be able to pinpoint the error cause.");
            }

        }

        private string GetScriptFile()
        {
            String addition = "";

            switch (mainFile.Split('.').Last().ToLower())
            {
                case "sav":
                    addition = "-sav.Rmd";
                    break;
                case "dta":
                    addition = "-dta.Rmd";
                    break;
                case "sas7bdat":
                    addition = "-sas.Rmd";
                    break;
                case "csv":
                    addition = "-csv.Rmd";
                    break;
                default:
                    System.Windows.Forms.MessageBox.Show("Unknown data file extension. Only SAV, DTA, SAS7bdat and CSV are supported.");
                    return "0";
            }


            return System.IO.Directory.GetCurrentDirectory().Replace("\\", "/") + "/Tool_files/" + this.scripts[c_script.SelectedIndex] + addition;

        }

        static int ExecuteCommand(string command, string logfile = "")
        {
            int result;

            var processInfo = new ProcessStartInfo("cmd.exe", "/c " + command);
            processInfo.CreateNoWindow = true;
            processInfo.UseShellExecute = false;
            processInfo.RedirectStandardError = true;
            processInfo.RedirectStandardOutput = true;

            var process = Process.Start(processInfo);

            StreamWriter w = File.AppendText(logfile);

            process.OutputDataReceived += (object sender, DataReceivedEventArgs e) =>
                //                Console.WriteLine("output>>" + e.Data);
                w.WriteLine(e.Data);

            process.BeginOutputReadLine();

            process.ErrorDataReceived += (object sender, DataReceivedEventArgs e) =>
                //               Console.WriteLine("error>>" + e.Data);
                w.WriteLine(e.Data);
            process.BeginErrorReadLine();

            process.WaitForExit();

            Console.WriteLine("ExitCode: {0}", process.ExitCode);
            w.WriteLine(process.ExitCode);

            result = process.ExitCode;
            process.Close();

            return result;
        }

        private void dtb_TextChanged(object sender, EventArgs e)
        {

        }
    }

}