using System;
using System.Reactive;
using System.Reactive.Linq;
using System.Threading.Tasks;
using Flawless.Client.Remote;
using Flawless.Client.Service;
using ReactiveUI;
using ReactiveUI.SourceGenerators;
using Refit;

namespace Flawless.Client.ViewModels;

public partial class LoginPageViewModel : ViewModelBase, IRoutableViewModel
{

    public string? UrlPathSegment { get; } = Guid.NewGuid().ToString();
    
    public IScreen HostScreen { get; }
    
    [Reactive] private string _username = "cardidi";

    [Reactive] private string _password = "4453A2b33";

    [Reactive(SetModifier = AccessModifier.Protected)] private string _issue = String.Empty;
    
    public IObservable<bool> CanLogin;

    public IObservable<bool> CanRegister => Api.C.Status.Select(s => s != null && s.AllowPublicRegister);
    
    public LoginPageViewModel(IScreen hostScreen)
    {
        HostScreen = hostScreen;
        
        CanLogin = this.WhenAnyValue(
            x => x.Username,
            x => x.Password,
            (user, pass) => !string.IsNullOrEmpty(user) && user.Length > 3 && !string.IsNullOrEmpty(pass) && pass.Length >= 6
        );

    }
    
    [ReactiveCommand(CanExecute = nameof(CanRegister))]
    private void Register()
    {
        HostScreen.Router.Navigate.Execute(new RegisterPageViewModel(HostScreen));
    }

    [ReactiveCommand(CanExecute = nameof(CanLogin))]
    private async Task LoginAsync()
    {
        try
        {
            await Api.C.LoginAsync(Username, Password);
            await RepositoryService.C.UpdateRepositoriesFromServerAsync();
        }
        catch (ApiException ex)
        {
            await Console.Error.WriteLineAsync($"Login as '{Username}' Failed: {ex.Content}");
            Issue = ex.Content ?? String.Empty;
        }
        catch (Exception ex)
        {
            await Console.Error.WriteLineAsync($"Login as '{Username}' Failed: {ex}");
            Issue = ex.Message;
        }
        
        Console.WriteLine($"Login as '{Username}' success!");
    }

}