using Avalonia.Controls;
using LehrerApp.Core.Interfaces;
using LehrerApp.Core.Models;
using LehrerApp.Core.Services;
using LehrerApp.Desktop.ViewModels.Planning;
using LehrerApp.Desktop.ViewModels.Groups;
using LehrerApp.Desktop.Views.Groups;
using Microsoft.Extensions.DependencyInjection;

namespace LehrerApp.Desktop.Views.Planning;

public partial class TimetableView : UserControl
{
    public TimetableView() => InitializeComponent();

    protected override void OnDataContextChanged(EventArgs e)
    {
        base.OnDataContextChanged(e);
        if (DataContext is TimetableViewModel vm)
        {
            vm.OnEditSlot = ShowSlotDialog;
            vm.OnAddSubstitution = ShowSubstitutionDialog;
            vm.OnOpenLessonViewer = ShowLessonViewerDialog;
            vm.OnOpenTeachingMode = ShowTeachingMode;
        }
    }

    private async Task ShowTeachingMode(Lesson lesson)
    {
        var owner = TopLevel.GetTopLevel(this) as Window;
        var group = App.Services.GetRequiredService<IGroupRepository>().GetById(lesson.GroupId);
        if (owner is null || group is null) return;

        var teachingModeVm = new TeachingModeViewModel(lesson, group,
            App.Services.GetRequiredService<IAlternativeLessonPathRepository>(),
            App.Services.GetRequiredService<SeatingPlanTabViewModel>());
        var window = new TeachingModeWindow { DataContext = teachingModeVm };
        await window.ShowDialog(owner);
    }

    private async Task ShowLessonViewerDialog(Lesson lesson)
    {
        var owner = TopLevel.GetTopLevel(this) as Window;
        if (owner is null) return;

        var viewerVm = new LessonViewerViewModel(lesson,
            App.Services.GetRequiredService<IAlternativeLessonPathRepository>());
        var dialog = new LessonViewerDialog { DataContext = viewerVm };
        await dialog.ShowDialog(owner);
    }

    private async Task ShowSlotDialog(TimetableCellItem cell)
    {
        var owner = TopLevel.GetTopLevel(this) as Window;
        if (owner is null || cell.Weekday is null) return;

        var vm = new TimetableSlotDialogViewModel(
            App.Services.GetRequiredService<ITimetableSlotRepository>(),
            App.Services.GetRequiredService<IGroupRepository>(),
            App.Services.GetRequiredService<ISubjectRepository>(),
            App.Services.GetRequiredService<SchoolYearService>(),
            cell.Weekday.Value, cell.PeriodNumber, cell.Slot);

        var dialog = new TimetableSlotDialog { DataContext = vm };
        await dialog.ShowDialog(owner);
    }

    private async Task ShowSubstitutionDialog()
    {
        var owner = TopLevel.GetTopLevel(this) as Window;
        if (owner is null) return;

        var vm = new SubstitutionEntryDialogViewModel(
            App.Services.GetRequiredService<ISubstitutionEntryRepository>(),
            App.Services.GetRequiredService<IGroupRepository>(),
            App.Services.GetRequiredService<IUnitRepository>(),
            App.Services.GetRequiredService<ILessonRepository>());

        var dialog = new SubstitutionEntryDialog { DataContext = vm };
        await dialog.ShowDialog(owner);
    }
}