using qdr.app.studiou.orders2printpack.Extensions;
using qdr.app.studiou.orders2printpack.Properties;
using Quadarax.Foundation.Core.Data;
using Quadarax.Foundation.Core.IO;
using Quadarax.Foundation.Core.Value;
using Quadarax.Foundation.Core.Value.Extensions;
using System.Data;
using System.IO.Abstractions;

namespace qdr.app.studiou.orders2printpack
{
    public partial class FormBatch : Form
    {
        #region *** Constants ***
        private const string CS_COL_SOURCE_PATH = "LocalPath";
        private const string CS_COL_ID = "LocalID";
        private const string CS_COL_OUTPUT = "OutputFileName";
        private const string CS_COL_EXTERNALORDER = "ExternalOrder";
        private const string CS_COL_EXTERNALORDERDATE = "ExternalOrderDate";
        private const string CS_TAG_LB = "{";
        private const string CS_TAG_RB = "}";
        private const string CS_TAG_EXT = "ext";
        private const string CS_TAG_FILE = "file";
        private const string CS_TAG_ORDINAL = "ordinal";
        #endregion

        #region *** Private Fields ***
        private DataTable _source = new();
        private readonly Dictionary<string, int> _sourceColOrdinals = [];
        private readonly List<string> _sourcePathCache = [];
        private readonly IFileSystem _fs = new FileSystem();
        private string _outputPath;
        #endregion

        #region *** Constructor ***
        public FormBatch()
        {
            InitializeComponent();
            _outputPath = string.Empty;
        }
        #endregion

        #region *** Form Handlers ***
        private void FormMain_Load(object sender, EventArgs e)
        {
            Text = $"{Application.ProductName} v{Application.ProductVersion}";
            RefreshToolButtons();
        }

        [System.Diagnostics.CodeAnalysis.SuppressMessage("Style", "IDE1006:Naming Styles", Justification = "<Pending>")]
        private void butOpenOrdersFile_Click(object sender, EventArgs e)
        {
            if (dlgOpenFile.ShowDialog() == DialogResult.OK)
                OpenOrderBatchFile(dlgOpenFile.FileName);
            RefreshToolButtons();
        }

        [System.Diagnostics.CodeAnalysis.SuppressMessage("Style", "IDE1006:Naming Styles", Justification = "<Pending>")]
        private void butOpenSource_Click(object sender, EventArgs e)
        {
            dlgOpenDir.Description = "Otevřít složku se zdrojovými (RAW) soubory...";
            dlgOpenDir.UseDescriptionForTitle = true;

            dlgOpenDir.InitialDirectory = AppSettings.Default.LastSourceDir;
            if (dlgOpenDir.ShowDialog() == DialogResult.OK)
            {
                BlockErrorHandled(() =>
                {
                    if (!string.IsNullOrEmpty(_outputPath) && dlgOpenDir.SelectedPath == _outputPath)
                        throw new Exception($"Vstupní složka '{dlgOpenDir.SelectedPath}' je stejná jako výstupní.");

                    AppSettings.Default.LastSourceDir = dlgOpenDir.SelectedPath;
                    AppSettings.Default.Save();

                    OpenSourceDir(dlgOpenDir.SelectedPath);
                });
            }
            RefreshToolButtons();
        }

        [System.Diagnostics.CodeAnalysis.SuppressMessage("Style", "IDE1006:Naming Styles", Justification = "<Pending>")]
        private void butOutputDir_Click(object sender, EventArgs e)
        {
            dlgOpenDir.Description = "Otevřít složku pro výstup...";
            dlgOpenDir.UseDescriptionForTitle = true;

            dlgOpenDir.InitialDirectory = AppSettings.Default.LastOutputDir;
            if (dlgOpenDir.ShowDialog() == DialogResult.OK)
            {
                BlockErrorHandled(() =>
                {
                    if (!string.IsNullOrEmpty(AppSettings.Default.LastSourceDir) && dlgOpenDir.SelectedPath == AppSettings.Default.LastSourceDir)
                        throw new Exception($"Výstupní složka '{dlgOpenDir.SelectedPath}' je stejná jako vstupní.");

                    _outputPath = dlgOpenDir.SelectedPath;
                    Log($"Otevřena složka výstupu '{_outputPath}'");
                    AppSettings.Default.LastOutputDir = dlgOpenDir.SelectedPath;
                    AppSettings.Default.Save();
                    tbOutputDir.Text = _outputPath;
                });

            }
            RefreshToolButtons();
        }

        [System.Diagnostics.CodeAnalysis.SuppressMessage("Style", "IDE1006:Naming Styles", Justification = "<Pending>")]
        private void tsbCheck_Click(object sender, EventArgs e)
        {
            CheckSourceOrderFile();
            RefreshToolButtons();
        }

        [System.Diagnostics.CodeAnalysis.SuppressMessage("Style", "IDE1006:Naming Styles", Justification = "<Pending>")]
        private void tsbDo_Click(object sender, EventArgs e)
        {
            ProcessSourceFile();
            RefreshToolButtons();
        }

        [System.Diagnostics.CodeAnalysis.SuppressMessage("Style", "IDE1006:Naming Styles", Justification = "<Pending>")]
        private void tsbAddSourceDir_Click(object sender, EventArgs e)
        {
            dlgOpenDir.Description = "Otevřít další složku se zdrojovými (RAW) soubory...";
            dlgOpenDir.UseDescriptionForTitle = true;

            dlgOpenDir.InitialDirectory = AppSettings.Default.LastSourceDir;
            if (dlgOpenDir.ShowDialog() == DialogResult.OK)
            {
                Log("Přidávám další zdrojovou složku...");
                OpenSourceDir(dlgOpenDir.SelectedPath, true);
            }
            RefreshToolButtons();
        }

        [System.Diagnostics.CodeAnalysis.SuppressMessage("Style", "IDE1006:Naming Styles", Justification = "<Pending>")]
        private void tsbProtocol_Click(object sender, EventArgs e)
        {
            var dlg = new dlgProtocol();
            if (dlg.ShowDialog(this) == DialogResult.OK)
                GenerateProtocol(dlg.ExternalOrder, dlg.ExternalOrderDate, dlg.ProtocolFile);
        }

        [System.Diagnostics.CodeAnalysis.SuppressMessage("Style", "IDE1006:Naming Styles", Justification = "<Pending>")]
        private void lbNotMapped_MouseDoubleClick(object sender, MouseEventArgs e)
        {
            if (lbNotMapped.SelectedIndices.Count == 0)
                return;

            var id = (int?)lbNotMapped.SelectedValue;
            if (id == null)
                return;

            var row = _source.Rows[id.GetValueOrDefault()];
            var fileName = _fs.Path.GetFileName(row.Field<string>(_sourceColOrdinals[AppSettings.Default.MapColUri]));

            dlgOpenFile.Title = "Vyberte zdrojový soubor soubor pro záznam...";
            dlgOpenFile.InitialDirectory = AppSettings.Default.LastSourceDir;
            dlgOpenFile.FileName = fileName;
            dlgOpenFile.Filter = "Všechny soubory|*.*";
            if (dlgOpenFile.ShowDialog() == DialogResult.OK)
            {
                var sourcePath = dlgOpenFile.FileName;
                row.SetField(_sourceColOrdinals[CS_COL_SOURCE_PATH], sourcePath);
                RefreshToolButtons();
            }
        }

        [System.Diagnostics.CodeAnalysis.SuppressMessage("Style", "IDE1006:Naming Styles", Justification = "<Pending>")]
        private void tsbSettings_Click(object sender, EventArgs e)
        {
            var dlg = new dlgSettings();
            dlg.ShowDialog();
        }

        #endregion


        #region *** Private Methods ***

        #region **** Common ****
        private void Log(string message)
        {
            lbLog.Items.Insert(0, message);
        }

        private int GetOrderCount()
        {
            return _source.AsEnumerable().Select(x => x.Field<string>(_sourceColOrdinals[AppSettings.Default.MapColOrderNo])).Distinct().Count();
        }

        private int GetLinesCount()
        {
            return _source.AsEnumerable().Count();
        }

        private string? GetSourceFullFileName(string? webUrl)
        {
            if (string.IsNullOrEmpty(webUrl))
                return null;

            var fileName = Path.GetFileName(webUrl);
            var sourcePath = _sourcePathCache.FirstOrDefault(x => string.Equals(Path.GetFileName(x), fileName));
            if (string.IsNullOrEmpty(sourcePath))
                Log($"Soubor '{fileName}' nebyl nalezen ve zdrojové složce.");
            return sourcePath;
        }

        private static string NormalizeColumnName(string name)
        {
            return name.ToLower().Replace(" ", "_");
        }

        private void ApplyRowToParametrizedString(DataRow row, ParameterizedString ps)
        {
            foreach (DataColumn col in row.Table.Columns)
            {
                var ord = _sourceColOrdinals[col.ColumnName];
                ps.AddOrSetParameter(NormalizeColumnName(col.ColumnName), row[ord]?.ToString()!);
            }
        }


        private void BlockErrorHandled(Action block)
        {
            try
            {
                block();
            }
            catch (Exception ex)
            {
                Log("Error: " + ex.Message);
                MessageBox.Show(this, ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                RefreshToolButtons();
            }
        }
        #endregion

        #region **** Bussiness ****
        private void OpenOrderBatchFile(string fileName)
        {
            BlockErrorHandled(() =>
            {

                _source = CsvHelper.CsvToDataTable(_fs, fileName, AppSettings.Default.CSVDelimiter);
                _source.Columns.Add(new DataColumn(CS_COL_SOURCE_PATH, typeof(string)));
                _source.Columns.Add(new DataColumn(CS_COL_ID, typeof(int)));
                _source.Columns.Add(new DataColumn(CS_COL_OUTPUT, typeof(string)));
                _source.Columns.Add(new DataColumn(CS_COL_EXTERNALORDER, typeof(string)));
                _source.Columns.Add(new DataColumn(CS_COL_EXTERNALORDERDATE, typeof(string)));


                _sourceColOrdinals.Clear();
                for (int i = 0; i < _source.Columns.Count; i++)
                    _sourceColOrdinals.Add(_source.Columns[i].ColumnName.Replace("\"", ""), i);

                var invalidRows = new List<DataRow>();
                foreach (DataRow row in _source.Rows)
                {
                    if (string.Equals(row[_sourceColOrdinals[AppSettings.Default.MapColUri]]?.ToString(), "null", StringComparison.CurrentCultureIgnoreCase))
                        invalidRows.Add(row);
                }

                foreach (var row in invalidRows)
                    _source.Rows.Remove(row);

                Log($"{invalidRows.Count} položek ignorováno, nebylo vyplněno URL");

                var cntId = 0;
                foreach (DataRow row in _source.Rows)
                    row.SetField(_sourceColOrdinals[CS_COL_ID], cntId++);

                var cntOrders = GetOrderCount();
                var cntLines = GetLinesCount();
                Log($"Soubor {fileName} načten. Počet objednávek: {cntOrders}, počet záznamů: {cntLines}");
                tbOrdersSourceFile.Text = fileName;
                tspOrdersCount.Text = $"Objednávek: {cntOrders}";
            });
        }

        private void OpenSourceDir(string pathToSourceFolder, bool appendCache = false)
        {
            BlockErrorHandled(() =>
            {

                var fsrch = new FileSearch(pathToSourceFolder, true);
                if (!appendCache)
                    _sourcePathCache.Clear();

                tbSourceDir.Text = pathToSourceFolder;

                Log($"Procházím všechny soubory {AppSettings.Default.SourceSearchPattern} ve složce '{pathToSourceFolder}'...");
                Log("Tato operace může chvíli trvat!");
                var files = fsrch.Search(new[] { AppSettings.Default.SourceSearchPattern, "*" });
                if (files.Length == 0)
                    throw new Exception($"Nenalezeny žádné soubory pro zpracování ve složce '{pathToSourceFolder}'.");

                foreach (var file in files)
                    if (!_sourcePathCache.Any(x => x == file))
                        _sourcePathCache.Add(file);
                Log ("Kontrola duplicit...");
                var checkDuplicities = _sourcePathCache.Select(x => _fs.Path.GetFileName(x)).GetDuplicates();
                if (checkDuplicities.Count() > 0)
                { 
                    Log ("Duplicity nalezeny pro následující soubory:");
                    foreach (var dup in checkDuplicities)
                    {
                        Log(dup);
                    }
                }
                else
                {
                    Log("Žádné duplicity nenalezeny.");
                }
                tsbFiles.Text = "Souborů: " + _sourcePathCache.Count.ToString();
                Log($"Nalezeno {files.Length} souborů.");

            });
        }
        private void CheckSourceOrderFile()
        {
            ssProgress.Value = 0;
            int cntFailed = 0;
            BlockErrorHandled(() =>
            {
                var rows = _source.AsEnumerable().Where(x => string.IsNullOrEmpty(x.Field<string>(_sourceColOrdinals[CS_COL_SOURCE_PATH])));

                ssProgress.Maximum = rows.Count();
                foreach (var row in rows)
                {
                    var orderNo = row.Field<string>(_sourceColOrdinals[AppSettings.Default.MapColOrderNo]);
                    var sourceUrl = row[_sourceColOrdinals[AppSettings.Default.MapColUri]]?.ToString();
                    var sourcePath = GetSourceFullFileName(sourceUrl);
                    if (sourcePath == null) cntFailed++;

                    row.SetField(_sourceColOrdinals[CS_COL_SOURCE_PATH], sourcePath);
                    ssProgress.Increment(1);
                }
            });
            tsbNotFound.Text = $"Nenalezeno: {cntFailed}";
            ssProgress.Value = 0;
        }


        private void ProcessSourceFile()
        {
            ssProgress.Value = 0;
            BlockErrorHandled(() =>
            {

                var rows = _source.AsEnumerable().Where(x => string.IsNullOrEmpty(x.Field<string>(_sourceColOrdinals[CS_COL_SOURCE_PATH])));

                if (rows.Any())
                    throw new Exception("Některé řádky nebyly zkontrolovány. Proveďte kontrolu zdrojových souborů (1. Kontrola).");

                rows = _source.AsEnumerable();
                //var colNames = _source.Columns.Cast<DataColumn>().Select(x => NormalizeColumnName(x.ColumnName)).ToArray();

                if (AppSettings.Default.CleanupOutputDir)
                {
                    Log($"Čistím složku výstupu '{_outputPath}' ...");
                    CleanupDirectory(_outputPath);
                }

                ssProgress.Maximum = rows.Count();
                var outputFileNameBuilder = new ParameterizedString(AppSettings.Default.OutputFileMask, CS_TAG_LB, CS_TAG_RB);

                foreach (var row in rows)
                {
                    var orderNo = row.Field<string>(_sourceColOrdinals[AppSettings.Default.MapColOrderNo]);
                    var sourceUrl = row[_sourceColOrdinals[AppSettings.Default.MapColUri]]?.ToString();
                    var qty = int.Parse(row[_sourceColOrdinals[AppSettings.Default.MapColQuantity]]?.ToString()!);
                    var sourcePath = row[_sourceColOrdinals[CS_COL_SOURCE_PATH]]?.ToString();
                    var sourceExt = _fs.Path.GetExtension(sourcePath);
                    var sourceFileName = _fs.Path.GetFileNameWithoutExtension(sourcePath);

                    ApplyRowToParametrizedString(row, outputFileNameBuilder);
                    outputFileNameBuilder.AddOrSetParameter(CS_TAG_EXT, sourceExt!);
                    outputFileNameBuilder.AddOrSetParameter(CS_TAG_FILE, sourceFileName!);

                    for (int i = 0; i < qty; i++)
                    {
                        outputFileNameBuilder.AddOrSetParameter(CS_TAG_ORDINAL, i.ToString().PadLeft(3, '0'));
                        var outputFileName = _fs.Path.GetFileName(outputFileNameBuilder.ToString());
                        var outputFilePath = _fs.Path.GetDirectoryName(outputFileNameBuilder.ToString())!;

                        var outputFileNameSanitized = FileUtils.SanitizedFileName(_fs, outputFileName);
                        var outputPath = _fs.Path.Combine(_outputPath, _fs.Path.Combine(outputFilePath, outputFileNameSanitized));
                        _fs.Directory.CreateDirectory(_fs.Path.GetDirectoryName(outputPath)!);
                        _fs.File.Copy(sourcePath!, outputPath, true);
                        Log($"Soubor '{outputPath}' vytvořen.");
                        row.SetField(_sourceColOrdinals[CS_COL_OUTPUT], outputPath);
                    }

                    ssProgress.Increment(1);
                }
            });
            ssProgress.Value = 0;
        }


        private void GenerateProtocol(string externalOrder, DateTime externalOrderDate, string protocolFile)
        {
            BlockErrorHandled(() =>
            {
                Log($"Nastavuji číslo externí objednávky: {externalOrder} a datum: {externalOrderDate.ToShortDateString()} ...");
                foreach (var row in _source.AsEnumerable())
                {
                    row.SetField(_sourceColOrdinals[CS_COL_EXTERNALORDER], externalOrder);
                    row.SetField(_sourceColOrdinals[CS_COL_EXTERNALORDERDATE], externalOrderDate.ToFileUtcString());
                }
                Log($"Generuji protokol ...");
                CsvUtils.DataTableToCsv(_fs, _source, protocolFile, AppSettings.Default.CSVDelimiter, (column) => { return NormalizeColumnName(column); });
                Log($"Protokol uložen do souboru '{protocolFile}'.");
            });
        }

        #endregion


        #region **** Refreshes ****
        private void RefreshToolButtons()
        {
            var canBeChecked = GetOrderCount() > 0 && _sourcePathCache.Count > 0;
            var canBeProcess = canBeChecked && !_source.AsEnumerable().Any(x => string.IsNullOrEmpty(x.Field<string>(_sourceColOrdinals[CS_COL_SOURCE_PATH]))) && !string.IsNullOrEmpty(_outputPath);
            var canBeCreateProtocol = canBeProcess && _source.AsEnumerable().All(x => !string.IsNullOrEmpty(x.Field<string>(_sourceColOrdinals[CS_COL_OUTPUT])));

            tsbCheck.Enabled = canBeChecked;
            tsbDo.Enabled = canBeProcess;
            tsbProtocol.Enabled = canBeCreateProtocol;

            RefreshNotMappedList();
        }

        private void RefreshNotMappedList()
        {
            var rows = _source.AsEnumerable().Where(x => string.IsNullOrEmpty(x.Field<string>(_sourceColOrdinals[CS_COL_SOURCE_PATH])));

            var list = new List<Tuple<int, string>>();

            foreach (var row in rows)
            {
                var id = row.Field<int>(_sourceColOrdinals[CS_COL_ID]);
                var fileName = _fs.Path.GetFileName(row.Field<string>(_sourceColOrdinals[AppSettings.Default.MapColUri]));
                var productName = row.Field<string>(_sourceColOrdinals[AppSettings.Default.MapColProductFormat]);
                var orderNo = row.Field<string>(_sourceColOrdinals[AppSettings.Default.MapColOrderNo]);
                list.Add(new Tuple<int, string>(id, $"{fileName} [Jméno: {productName} / Obj.:{orderNo}]"));
            }
            lbNotMapped.DisplayMember = "Item2";
            lbNotMapped.ValueMember = "Item1";
            lbNotMapped.DataSource = list;
            lbNotMapped.Update();
        }
        #endregion

        #region **** Support opperations ****
        public static void CleanupDirectory(string directoryPath)
        {
            return;
            /*
            if (string.IsNullOrWhiteSpace(directoryPath))
                throw new ArgumentException("Directory path cannot be null or empty.", nameof(directoryPath));


            if (!Directory.Exists(directoryPath))
                throw new DirectoryNotFoundException($"Directory not found: {directoryPath}");


            try
            {
                var di = new DirectoryInfo(directoryPath);

                foreach (var file in di.GetFiles())
                {
                    try
                    {
                        file.Delete();
                    }
                    catch { }
                }

                foreach (var dir in di.GetDirectories())
                {
                    try
                    {
                        dir.Delete(true);
                    }
                    catch { }
                }
            }
            catch (Exception)
            {
                throw;
            }
            */
        }
        #endregion

        #endregion


    }
}