using Avalonia.Controls;
using Avalonia.Interactivity;
using LehrerApp.Desktop.Services;
using LehrerApp.Desktop.ViewModels.Groups;
using Microsoft.Extensions.DependencyInjection;

namespace LehrerApp.Desktop.Views.Groups;

public partial class ExamEvaluationDialog : Window
{
    public ExamEvaluationDialog() => InitializeComponent();

    private async void OnExportClick(object? sender, RoutedEventArgs e)
    {
        if (DataContext is not ExamEvaluationDialogViewModel vm) return;
        var topLevel = TopLevel.GetTopLevel(this);
        if (topLevel is null) return;

        var export = ExportFile.Csv("Klausurauswertung exportieren",
            $"Auswertung_{vm.ExamTitle}.csv", vm.ExportCsv());
        await App.Services.GetRequiredService<ExportService>().SaveAsync(topLevel.StorageProvider, export);
    }

    private async void OnExportPdfClick(object? sender, RoutedEventArgs e)
    {
        if (DataContext is not ExamEvaluationDialogViewModel vm) return;
        var topLevel = TopLevel.GetTopLevel(this);
        if (topLevel is null) return;

        var stats = new List<LabelValue>
        {
            new("Bewertet", vm.GradedCount.ToString()),
            new("Abwesend", vm.AbsentCount.ToString()),
            new("Durchschnitt", vm.AverageDisplay),
            new("Median", vm.MedianDisplay),
        };
        if (!string.IsNullOrEmpty(vm.BelowThresholdLabel1))
            stats.Add(new(vm.BelowThresholdLabel1, vm.BelowThresholdDisplay1));
        if (!string.IsNullOrEmpty(vm.BelowThresholdLabel2))
            stats.Add(new(vm.BelowThresholdLabel2, vm.BelowThresholdDisplay2));

        var data = new ExamStatisticsPrintData(vm.ExamTitle, vm.ExamDateLabel, vm.NiveauLabel, stats,
            vm.GradeDistribution.Select(g => new GradeDistributionPrintRow(g.Grade, g.Count,
                vm.GradedCount == 0 ? 0 : g.Count * 100.0 / vm.GradedCount)).ToList(),
            vm.TaskAnalysis.Select(t => new TaskAnalysisPrintRow(t.Label, t.AvgPercent, t.IsWeak)).ToList());
        var pdf = App.Services.GetRequiredService<PdfExportService>().BuildExamStatisticsPdf(data);

        await App.Services.GetRequiredService<ExportService>().SaveAsync(topLevel.StorageProvider,
            ExportFile.Pdf("Klausurauswertung als PDF speichern", $"Auswertung_{vm.ExamTitle}", pdf));
    }

    private void OnClose(object? sender, RoutedEventArgs e) => Close();
}