using bsmd.database;
using ClosedXML.Excel;
using Microsoft.Win32;
using System;
using System.Collections.Generic;
using System.IO;
using System.Windows;

namespace ENI2.Excel
{
    internal static class ExcelLocalImportHelper
    {

        #region Last 10 Port Facilities Called Import from Excel

        public static int ImportLast10PortFacilities(SEC sec)
        {
            int cnt = 0;

            OpenFileDialog ofd = new OpenFileDialog
            {
                Filter = "Excel Files|*.xls;*.xlsx"
            };

            if (ofd.ShowDialog() ?? false)
            {
                try
                {
                    using (var stream = new FileStream(ofd.FileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
                    using (var workbook = new XLWorkbook(stream))
                    {
                        var worksheet = workbook.Worksheet(1);
                        var rows = worksheet.RangeUsed().RowsUsed();
                        int columnCount = worksheet.RangeUsed().ColumnCount();

                        // Check minimum columns upfront
                        if (columnCount < 8)
                        {
                            throw new InvalidDataException("Sheet must have at least 8 Columns of data");
                        }

                        List<LastTenPortFacilitiesCalled> importL10C = new List<LastTenPortFacilitiesCalled>();

                        
                        foreach (var row in rows)
                        {
                            if (cnt >= 10) break; // Maximum 10 rows

                            // Skip empty rows
                            if (row.Cell(1).IsEmpty() && row.Cell(2).IsEmpty()) continue;

                            LastTenPortFacilitiesCalled l10c = new LastTenPortFacilitiesCalled();

                            try
                            {
                                // Column 1: Port Name
                                if (!row.Cell(1).IsEmpty())
                                    l10c.PortFacilityPortName = row.Cell(1).GetString();

                                // Column 3: Country
                                if (!row.Cell(3).IsEmpty())
                                    l10c.PortFacilityPortCountry = row.Cell(3).GetString();

                                // Column 4: Locode
                                if (!row.Cell(4).IsEmpty())
                                    l10c.PortFacilityPortLoCode = row.Cell(4).GetString();

                                // Column 5: Arrival Date
                                if (!row.Cell(5).IsEmpty())
                                {
                                    l10c.PortFacilityDateOfArrival = row.Cell(5).GetDateTime();
                                }

                                // Column 6: Departure Date
                                if (!row.Cell(6).IsEmpty())
                                {
                                    l10c.PortFacilityDateOfDeparture = row.Cell(6).GetDateTime();
                                }

                                // Column 7: Security Level (byte)
                                if (!row.Cell(7).IsEmpty())
                                {
                                    l10c.PortFacilityShipSecurityLevel = row.Cell(7).GetValue<byte>();
                                }

                                // Column 8: GISIS Code
                                if (!row.Cell(8).IsEmpty())
                                {
                                    int gisis = row.Cell(8).GetValue<int>();
                                    l10c.PortFacilityGISISCode = gisis.ToString().PadLeft(4, '0');
                                }

                                // Column 9: Security Matters (optional, can be beyond minimum columns)
                                if (columnCount >= 9 && !row.Cell(9).IsEmpty())
                                {
                                    l10c.PortFacilitySecurityMattersToReport = row.Cell(9).GetString();
                                    if (l10c.PortFacilitySecurityMattersToReport?.Equals("nil", StringComparison.OrdinalIgnoreCase) == true)
                                        l10c.PortFacilitySecurityMattersToReport = null;
                                }

                                // Column 10: GISIS Code Locode (optional, can be beyond minimum columns)
                                if (columnCount >= 10 && !row.Cell(10).IsEmpty())
                                {
                                    l10c.PortFacilityGISISCodeLocode = row.Cell(10).GetString();
                                }

                                l10c.SEC = sec;
                                l10c.IsDirty = true;
                                l10c.Identifier = LastTenPortFacilitiesCalled.GetNewIdentifier(sec.LastTenPortFacilitesCalled);
                                sec.LastTenPortFacilitesCalled.Add(l10c);
                                importL10C.Add(l10c);
                                cnt++;
                            }
                            catch (Exception ex)
                            {
                                throw new InvalidDataException($"Error processing row {row.RowNumber()}: {ex.Message}", ex);
                            }
                        }                        
                    }
                }
                catch (Exception ex)
                {
                    MessageBox.Show("Error reading Excel: " + ex.Message, Properties.Resources.textCaptionError,
                        MessageBoxButton.OK, MessageBoxImage.Error);
                }
            }

            return cnt;
        }

        #endregion

        #region Last 30 days Import from Excel

        public static int ImportLast30Days(MDH mdh)
        {
            int cnt = 0;

            OpenFileDialog ofd = new OpenFileDialog
            {
                Filter = "Excel Files|*.xls;*.xlsx"
            };

            if (ofd.ShowDialog() ?? false)
            {
                try
                {
                    using (var stream = new FileStream(ofd.FileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
                    using (var workbook = new XLWorkbook(stream))
                    {
                        var worksheet = workbook.Worksheet(1);
                        var rows = worksheet.RangeUsed().RowsUsed();
                        int columnCount = worksheet.RangeUsed().ColumnCount();

                        List<PortOfCallLast30Days> importPoC30 = new List<PortOfCallLast30Days>();

                        foreach (var row in rows)
                        {
                            if (row.RowNumber() > worksheet.RangeUsed().RowCount()) break;

                            if (columnCount < 3)
                            {
                                throw new InvalidDataException("Sheet must have at least 3 Columns of data");
                            }

                            PortOfCallLast30Days poc30 = new PortOfCallLast30Days();

                            if (row.Cell(1).IsEmpty() && row.Cell(2).IsEmpty()) continue;

                            // Safer locode extraction
                            if (!row.Cell(1).IsEmpty())
                            {
                                try
                                {
                                    poc30.PortOfCallLast30DaysLocode = row.Cell(1).GetString();
                                }
                                catch (Exception ex)
                                {
                                    throw new InvalidDataException($"Invalid locode in row {row.RowNumber()}: {ex.Message}");
                                }
                            }

                            // Safer date extraction
                            if (!row.Cell(2).IsEmpty())
                            {
                                try
                                {
                                    poc30.PortOfCallLast30DaysDateOfDeparture = row.Cell(2).GetDateTime();
                                }
                                catch (Exception ex)
                                {
                                    throw new InvalidDataException($"Invalid date in row {row.RowNumber()}: {ex.Message}");
                                }
                            }

                            // Safer boolean extraction
                            string boolString = "";
                            if (!row.Cell(3).IsEmpty())
                            {
                                boolString = row.Cell(3).GetString()?.Trim() ?? "";
                            }
                            poc30.PortOfCallLast30DaysCrewMembersJoined = (
                                boolString.Equals("y", StringComparison.OrdinalIgnoreCase) ||
                                boolString.Equals("yes", StringComparison.OrdinalIgnoreCase) ||
                                boolString.Equals("j", StringComparison.OrdinalIgnoreCase));

                            // FIX: Check column count before accessing column 4
                            if (columnCount >= 4)
                            {
                                string allNewCrew = row.Cell(4).IsEmpty() ? null : row.Cell(4).GetString()?.Trim();
                                if (!allNewCrew.IsNullOrEmpty())
                                {
                                    string[] crewNames = allNewCrew.Split(',', ';');
                                    foreach (string crewName in crewNames)
                                    {
                                        string trimmedName = crewName.Trim();
                                        if (trimmedName.IsNullOrEmpty()) continue;

                                        PortOfCallLast30DaysCrewJoinedShip poc30Crew = new PortOfCallLast30DaysCrewJoinedShip
                                        {
                                            PortOfCallLast30DaysCrewJoinedShipName = trimmedName,
                                            PortOfCallLast30Days = poc30
                                        };
                                        poc30.CrewJoinedShip.Add(poc30Crew);
                                    }
                                }
                            }

                            poc30.MDH = mdh;
                            mdh.PortOfCallLast30Days.Add(poc30);
                            importPoC30.Add(poc30);
                        }                        
                    }
                }
                catch (Exception ex)
                {
                    MessageBox.Show("Error reading Excel: " + ex.Message, Properties.Resources.textCaptionError,
                        MessageBoxButton.OK, MessageBoxImage.Error);
                }
            }

            return cnt;
        }

        #endregion

    }
}