using Elwig.Helpers;
using Elwig.Helpers.Billing;
using Elwig.Helpers.Export;
using Elwig.Models.Dtos;
using Microsoft.Win32;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Input;

namespace Elwig.Windows {
    public partial class MainWindow : ContextWindow {

        public MainWindow() {
            InitializeComponent();
            var v = Assembly.GetExecutingAssembly().GetName().Version;
            VersionField.Text = "Version: " + (v == null ? "?" : $"{v.Major}.{v.Minor}.{v.Build}") + $" – {App.BranchName}";
            if (App.Client.Client == null) VersionField.Text += " (Unbekannt)";
            Menu_Help_Update.IsEnabled = App.Config.UpdateUrl != null;
            Menu_Help_Smtp.IsEnabled = App.Config.Smtp != null;
            Menu_Database_Sync.IsEnabled = App.Config.SyncUrl != null;
        }

        private void Window_Loaded(object sender, RoutedEventArgs evt) {
            SeasonInput.Value = Utils.CurrentLastSeason;
        }

        private void Window_Closing(object sender, CancelEventArgs evt) {
            if (App.NumWindows > 1 && !App.ForceShutdown) {
                var res = MessageBox.Show("Es sind noch weitere Fenster geöffnet.\nSollen alle Fenster geschlossen werden?",
                    "Elwig beenden", MessageBoxButton.YesNo, MessageBoxImage.Warning, MessageBoxResult.No);
                if (res != MessageBoxResult.Yes) {
                    evt.Cancel = true;
                } else {
                    Application.Current.Shutdown();
                }
            }
        }

        private async void Menu_Help_Update_Click(object sender, RoutedEventArgs evt) {
            await App.CheckForUpdates(true);
        }

        private async void Menu_Help_Smtp_Click(object sender, RoutedEventArgs evt) {
            Mouse.OverrideCursor = Cursors.AppStarting;
            try {
                using var client = await Utils.GetSmtpClient();
                await client!.DisconnectAsync(true);
                MessageBox.Show("E-Mail-Einstellungen erfolgreich überprüft!", "Erfolg", MessageBoxButton.OK, MessageBoxImage.Information);
            } catch (Exception exc) {
                MessageBox.Show(exc.Message, "Fehler", MessageBoxButton.OK, MessageBoxImage.Error);
            }
            Mouse.OverrideCursor = null;
        }

        private void Menu_Help_Config_Click(object sender, RoutedEventArgs evt) {
            Process.Start("explorer.exe", App.DataPath);
        }

        private void Menu_Database_Query_Click(object sender, RoutedEventArgs evt) {
            var w = new QueryWindow();
            w.Show();
        }

        private void Menu_Database_Open_Click(object sender, RoutedEventArgs evt) {
            if (Path.GetDirectoryName(App.Config.DatabaseFile) is string path)
                Process.Start("explorer.exe", path);
        }

        private void Menu_Database_Export_Click(object sender, RoutedEventArgs evt) {
            // TODO Menu_Database_Export_Click
        }

        private void Menu_Database_Import_Click(object sender, RoutedEventArgs evt) {
            // TODO Menu_Database_Import_Click
        }

        private async void Menu_Database_Sync_Click(object sender, RoutedEventArgs evt) {
            if (App.Config.SyncUrl == null)
                return;
            Mouse.OverrideCursor = Cursors.AppStarting;
            try {
                var data = await Utils.GetExportMetaData(App.Config.SyncUrl, App.Config.SyncUsername, App.Config.SyncPassword);
                var files = data
                    .Select(f => new {
                        Name = f!["name"]!.AsValue().GetValue<string>(),
                        Timestamp = f!["timestamp"] != null && DateTime.TryParseExact(f!["timestamp"]!.AsValue().GetValue<string>(), "yyyy-MM-ddTHH:mm:ssK", CultureInfo.InvariantCulture, DateTimeStyles.None, out var dt) ? dt : (DateTime?)null,
                        ZwstId = f!["zwstid"]?.AsValue().GetValue<string>(),
                        DeliveryNum = f!["meta"]?["deliveries"]?["count"]!.AsValue().GetValue<int>(),
                        DeliveryPartNum = f!["meta"]?["deliveries"]?["parts"]!.AsValue().GetValue<int>(),
                        Filters = f!["meta"]?["deliveries"]?["filters"]!.AsArray().Select(i => i!.AsValue().GetValue<string>()).ToArray(),
                        Device = f!["meta"]?["device"]!.AsValue().GetValue<string>(),
                        Url = f!["url"]!.AsValue().GetValue<string>(),
                        Size = f!["size"]!.AsValue().GetValue<long>(),
                    })
                    .Where(f => f.DeliveryNum > 0 && f.Timestamp >= new DateTime(Utils.CurrentLastSeason, 7, 1))
                    .ToList();

                var imported = await ElwigData.GetImportedFiles();
                var import = files
                    .Where(f => f.Filters != null && f.Filters.Length > 0 && f.Device != Environment.MachineName && !imported.Contains(f.Name))
                    .ToList();
                var paths = new List<string>();
                using (var client = Utils.GetHttpClient(App.Config.SyncUsername, App.Config.SyncPassword)) {
                    foreach (var f in import) {
                        var filename = Path.Combine(App.TempPath, f.Name);
                        using var stream = new FileStream(filename, FileMode.Create);
                        await client.DownloadAsync(f.Url, stream);
                        paths.Add(filename);
                    }
                }
                await ElwigData.Import(paths, false);
            } catch (Exception exc) {
                MessageBox.Show(exc.Message, "Fehler", MessageBoxButton.OK, MessageBoxImage.Error);
            }
            Mouse.OverrideCursor = null;
        }

        private void MemberAdminButton_Click(object sender, RoutedEventArgs evt) {
            var w = new MemberAdminWindow();
            w.Show();
        }

        private void ReceiptButton_Click(object sender, RoutedEventArgs evt) {
            App.FocusReceipt();
        }

        private void DeliveryAdminButton_Click(object sender, RoutedEventArgs evt) {
            var w = new DeliveryAdminWindow();
            w.Show();
        }

        private void BaseDataButton_Click(object sender, RoutedEventArgs evt) {
            App.FocusBaseData();
        }

        private void MailButton_Click(object sender, RoutedEventArgs evt) {
            App.FocusMailWindow();
        }

        protected override Task OnRenewContext(AppDbContext ctx) {
            SeasonInput_ValueChanged(null, null);
            return Task.CompletedTask;
        }

        private void SeasonFinish_Expanded(object sender, RoutedEventArgs evt) {
            Height = 530;
        }

        private void SeasonFinish_Collapsed(object sender, RoutedEventArgs evt) {
            Height = 390;
        }

        private async void SeasonInput_ValueChanged(object? sender, RoutedEventArgs? evt) {
            using var ctx = new AppDbContext();
            var s0 = await ctx.Seasons.FindAsync(SeasonInput.Value);
            var valid = (s0 != null);
            DeliveryConfirmationButton.IsEnabled = valid;
            OverUnderDeliveryButton.IsEnabled = valid;
            AutoBusinessSharesButton.IsEnabled = valid && false;
            PaymentButton.IsEnabled = valid;
        }

        private void DeliveryConfirmationButton_Click(object sender, RoutedEventArgs evt) {
            if (SeasonInput.Value is not int year)
                return;
            var w = App.FocusMailWindow(year);
            w.AddDeliveryConfirmation();
        }

        private async void OverUnderDeliveryButton_Click(object sender, RoutedEventArgs evt) {
            if (SeasonInput.Value is not int year)
                return;
            var d = new SaveFileDialog() {
                FileName = $"Über-Unterlieferungen-{year}.ods",
                DefaultExt = "ods",
                Filter = "OpenDocument Format Spreadsheet (*.ods)|*.ods",
                Title = $"Über-/Unterlieferungen {year} speichern unter - Elwig"
            };
            if (d.ShowDialog() == false)
                return;

            Mouse.OverrideCursor = Cursors.AppStarting;
            try {
                var b = new Billing(year);
                await b.FinishSeason();
                await b.CalculateBuckets();
                await App.HintContextChange();

                using var ctx = new AppDbContext();
                var tbl1 = await OverUnderDeliveryData.ForSeason(ctx.OverUnderDeliveryRows, year);
                var tbl2 = await AreaComUnderDeliveryData.ForSeason(ctx.AreaComUnderDeliveryRows, year);
                var tbl3 = await MemberDeliveryPerVariantData.ForSeason(ctx.MemberDeliveryPerVariantRows, year);
                using var ods = new OdsFile(d.FileName);
                await ods.AddTable(tbl1);
                await ods.AddTable(tbl2);
                await ods.AddTable(tbl3);
            } catch (Exception exc) {
                MessageBox.Show(exc.Message, "Fehler", MessageBoxButton.OK, MessageBoxImage.Error);
            }
            Mouse.OverrideCursor = null;
        }

        private async void AutoBusinessSharesButton_Click(object sender, RoutedEventArgs evt) {
            if (SeasonInput.Value is not int year)
                return;
            if (false && App.Client.IsMatzen) {
                AutoBusinessSharesButton.IsEnabled = false;
                Mouse.OverrideCursor = Cursors.AppStarting;

                var b = new Billing(year);
                await b.AutoAdjustBusinessShare();

                Mouse.OverrideCursor = null;
                AutoBusinessSharesButton.IsEnabled = true;
            } else {
                MessageBox.Show(
                    "Es ist kein automatisches Nachzeichnen der Geschäftsanteile\n" +
                    "für diese Genossenschaft eingestellt!\n" +
                    "Bitte wenden Sie sich an die Programmierer!", "Fehler",
                    MessageBoxButton.OK, MessageBoxImage.Information);
            }
        }

        private void PaymentButton_Click(object sender, RoutedEventArgs evt) {
            if (SeasonInput.Value is not int year)
                return;
            App.FocusPaymentVariants(year);
        }
    }
}