using System;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Input;
using CRAWLER.Models;
using CRAWLER.Services;
using CRAWLER.ViewModels;

namespace CRAWLER;

public partial class MainWindow : Window
{
    private readonly IFilePickerService _filePickerService;
    private readonly MainWindowViewModel _viewModel;

    internal MainWindow(
        InstrumentCatalogService catalogService,
        IPdfOpener pdfOpener,
        IFilePickerService filePickerService)
    {
        InitializeComponent();
        _filePickerService = filePickerService;
        _viewModel = new MainWindowViewModel(catalogService, pdfOpener);
        DataContext = _viewModel;
    }

    private async void Window_Loaded(object sender, RoutedEventArgs e)
    {
        await ExecuteUiAsync(_viewModel.InitializeAsync);
    }

    private async void RefreshButton_Click(object sender, RoutedEventArgs e)
    {
        await ExecuteUiAsync(() => _viewModel.RefreshAsync());
    }

    private async void SyncButton_Click(object sender, RoutedEventArgs e)
    {
        await ExecuteUiAsync(async () =>
        {
            var result = await _viewModel.SyncAsync();
            MessageBox.Show(
                $"Обработано страниц: {result.PagesScanned}\n" +
                $"Обработано записей: {result.ProcessedItems}\n" +
                $"Добавлено: {result.AddedRecords}\n" +
                $"Обновлено: {result.UpdatedRecords}\n" +
                $"Пропущено страниц: {result.FailedPages}\n" +
                $"Пропущено записей: {result.FailedItems}\n" +
                $"Карточек без деталей: {result.SkippedDetailRequests}\n" +
                $"Скачано PDF: {result.DownloadedPdfFiles}\n" +
                $"Ошибок PDF: {result.FailedPdfFiles}",
                "CRAWLER",
                MessageBoxButton.OK,
                MessageBoxImage.Information);
        });
    }

    private async void AddButton_Click(object sender, RoutedEventArgs e)
    {
        var dialog = new Dialogs.EditInstrumentWindow(
            new EditInstrumentWindowViewModel(_viewModel.CreateNewDraft(), true),
            _filePickerService)
        {
            Owner = this
        };

        if (dialog.ShowDialog() == true)
        {
            await ExecuteUiAsync(() => _viewModel.SaveAsync(dialog.ViewModel.Draft, dialog.ViewModel.GetPendingPaths()));
        }
    }

    private async void EditButton_Click(object sender, RoutedEventArgs e)
    {
        if (_viewModel.SelectedInstrument == null)
        {
            return;
        }

        var dialog = new Dialogs.EditInstrumentWindow(
            new EditInstrumentWindowViewModel(_viewModel.CreateDraftFromSelected(), false),
            _filePickerService)
        {
            Owner = this
        };

        if (dialog.ShowDialog() == true)
        {
            await ExecuteUiAsync(() => _viewModel.SaveAsync(dialog.ViewModel.Draft, dialog.ViewModel.GetPendingPaths()));
        }
    }

    private async void DeleteButton_Click(object sender, RoutedEventArgs e)
    {
        if (_viewModel.SelectedInstrument == null)
        {
            return;
        }

        var answer = MessageBox.Show(
            $"Удалить запись \"{_viewModel.SelectedInstrument.Name}\"?",
            "CRAWLER",
            MessageBoxButton.YesNo,
            MessageBoxImage.Warning);

        if (answer == MessageBoxResult.Yes)
        {
            await ExecuteUiAsync(_viewModel.DeleteSelectedAsync);
        }
    }

    private async void AddPdfButton_Click(object sender, RoutedEventArgs e)
    {
        if (_viewModel.SelectedInstrument == null)
        {
            return;
        }

        var paths = _filePickerService.PickPdfFiles(true);
        if (paths.Count == 0)
        {
            return;
        }

        await ExecuteUiAsync(() => _viewModel.AddAttachmentsToSelectedAsync(paths));
    }

    private void OpenAttachmentButton_Click(object sender, RoutedEventArgs e)
    {
        _viewModel.OpenAttachment(AttachmentGrid.SelectedItem as PdfAttachment);
    }

    private async void RemoveAttachmentButton_Click(object sender, RoutedEventArgs e)
    {
        var attachment = AttachmentGrid.SelectedItem as PdfAttachment;
        if (attachment == null)
        {
            return;
        }

        var answer = MessageBox.Show(
            $"Удалить привязку к PDF \"{attachment.DisplayName}\"?",
            "CRAWLER",
            MessageBoxButton.YesNo,
            MessageBoxImage.Warning);

        if (answer == MessageBoxResult.Yes)
        {
            await ExecuteUiAsync(() => _viewModel.RemoveAttachmentAsync(attachment));
        }
    }

    private void OpenSourceButton_Click(object sender, RoutedEventArgs e)
    {
        _viewModel.OpenSourceUrl();
    }

    private async void InstrumentGrid_MouseDoubleClick(object sender, MouseButtonEventArgs e)
    {
        if (_viewModel.SelectedInstrument != null)
        {
            EditButton_Click(sender, e);
        }

        await Task.CompletedTask;
    }

    private async void SearchTextBox_KeyDown(object sender, KeyEventArgs e)
    {
        if (e.Key == Key.Enter)
        {
            e.Handled = true;
            await ExecuteUiAsync(() => _viewModel.RefreshAsync());
        }
    }

    private async Task ExecuteUiAsync(Func<Task> action)
    {
        try
        {
            await action();
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message, "CRAWLER", MessageBoxButton.OK, MessageBoxImage.Error);
        }
    }
}