using System;
using System.Reactive;
using System.Threading.Tasks;
using AutoCat.Utils;
using AutoCatCore.Model;
using AutoCatCore.Services.Api;
using ReactiveUI;

namespace AutoCat.ViewModels;

public class CheckNumberViewModel : ViewModelBase
{
    #region Fields

    private string _plateNumber = "";

    #endregion
    
    #region Dependencies

    private readonly IApiService _apiService;

    #endregion
    
    #region Commands

    public ReactiveCommand<string, Unit> CheckCommand { get; set; }

    #endregion

    #region Properties

    public string PlateNumber
    {
        get => _plateNumber;
        set => this.RaiseAndSetIfChanged(ref _plateNumber, value);
    }
    
    public Vehicle? Vehicle { get; set; }

    #endregion
    
    #region Events

    public event EventHandler? AutoCloseEvent;

    #endregion

    public CheckNumberViewModel(IApiService apiService)
    {
        _apiService = apiService;
        
        var checkEnabled = this.WhenAnyValue(vm => vm.PlateNumber, n => n.Length >= 8);
        CheckCommand = ReactiveCommand.CreateFromTask<string>(Check, checkEnabled);
        CheckCommand.ThrownExceptions.Subscribe(Alerts.ShowError);
    }

    private async Task Check(string number)
    {
        Vehicle = await _apiService.CheckNumber(number);
        AutoCloseEvent?.Invoke(this, EventArgs.Empty);
    }
}