using System.Collections.ObjectModel;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.DependencyInjection;
using OTSSignsOrchestrator.Core.Data;
using OTSSignsOrchestrator.Core.Models.Entities;

namespace OTSSignsOrchestrator.Desktop.ViewModels;

/// <summary>
/// ViewModel for viewing operation logs.
/// </summary>
public partial class LogsViewModel : ObservableObject
{
    private readonly IServiceProvider _services;

    [ObservableProperty] private ObservableCollection<OperationLog> _logs = new();
    [ObservableProperty] private string _statusMessage = string.Empty;
    [ObservableProperty] private bool _isBusy;
    [ObservableProperty] private int _maxEntries = 100;

    public LogsViewModel(IServiceProvider services)
    {
        _services = services;
        _ = LoadLogsAsync();
    }

    [RelayCommand]
    private async Task LoadLogsAsync()
    {
        IsBusy = true;
        try
        {
            using var scope = _services.CreateScope();
            var db = scope.ServiceProvider.GetRequiredService<XiboContext>();

            var items = await db.OperationLogs
                .Include(l => l.Instance)
                .OrderByDescending(l => l.Timestamp)
                .Take(MaxEntries)
                .ToListAsync();

            Logs = new ObservableCollection<OperationLog>(items);
            StatusMessage = $"Showing {items.Count} log entries.";
        }
        catch (Exception ex)
        {
            StatusMessage = $"Error loading logs: {ex.Message}";
        }
        finally
        {
            IsBusy = false;
        }
    }
}