using System;
using System.Collections.Generic;
using System.Linq;
using Pf2e.Database;
using Pf2e.Database.Model.Base;
using Pf2e.Database.Model.Enum;
using Pf2e.Scrapper.WPF.EntityViewer.Stores;
using Pf2e.WPF.EntityViewer.Stores;

namespace Pf2e.WPF.EntityViewer.ViewModel;

internal class EntityFormViewModel : ViewModelBase
{
    #region "Конструктор"

    public IServiceProvider ServiceProvider { get; }
    public Pf2eDbContext Context { get; }
    public EntityListViewModel DbEntityListViewModel { get; }
    public ViewViewModel ViewViewModel { get; }
    public SelectedEntityTypeStore SelectedEntityTypeStore { get; }
    public SelectedEntityStore SelectedEntityStore { get; }

    public EntityFormViewModel(
        IServiceProvider serviceProvider,
        Pf2eDbContext context,
        EntityListViewModel entityListViewModel,
        ViewViewModel viewViewModel,
        SelectedEntityTypeStore selectedEntityTypeStore,
        SelectedEntityStore selectedEntityStore
    )
    {
        ServiceProvider = serviceProvider;
        Context = context;
        DbEntityListViewModel = entityListViewModel;
        ViewViewModel = viewViewModel;
        SelectedEntityTypeStore = selectedEntityTypeStore;
        SelectedEntityStore = selectedEntityStore;

        Update();

        SelectedEntityStore.SelectedEntityChanged += SelectedEntityStore_SelectedEntityChanged;
    }

    public void Update()
    {
        LoadEntityTypes();
    }

    #endregion

    #region "Выбор типа"

    public IEnumerable<EntityType> EntityTypes { get; set; } = [];

    public EntityType? SelectedEntityType
    {
        get => SelectedEntityTypeStore.SelectedEntityType;
        set
        {
            SelectedEntityTypeStore.SelectedEntityType = value;
            OnPropertyChanged();
        }
    }

    private void LoadEntityTypes()
    {
        EntityTypes = Context.Entities.Select(e => e.Type).Distinct().Order().ToList();
        OnPropertyChanged(nameof(EntityTypes));

        SelectedEntityTypeStore.SelectedEntityType = EntityTypes.Any() ? EntityTypes.First() : null;
    }

    #endregion

    #region "Текущий элемент"

    public string SelectedEntityDescription
    {
        get => SelectedEntityStore.SelectedEntity?.Description ?? "";
    }

    private void SelectedEntityStore_SelectedEntityChanged(Entity? obj)
    {
        OnPropertyChanged(nameof(SelectedEntityDescription));
    }

    #endregion

    public string TestText => SelectedEntityType?.ToString() ?? "null";
}