using MakeMyProject.Models;
using MakeMyProject.Services;
using ReactiveUI;
using System;
using System.Reactive.Linq;

namespace MakeMyProject.ViewModels;

public class MainWindowViewModel : ViewModelBase
{
    ViewModelBase _content = new();

    private UserModel _loggedInUser = new();

    public MainWindowViewModel()
    {
        LoginScreen();
    }

    public void CreateNewUser()
    {
        var vm = new CreateNewUserViewModel();

        Observable.Merge(
            vm.Ok,
            vm.Cancel
            .Select(_ => (UserModel?)null))
            .Take(1)
            .Subscribe(model =>
            {
                if (model != null)
                {
                    LoggedInUser = model;
                    // Show Home Screen
                }
                else
                {
                    Environment.Exit(0);
                }
            });

        Content = vm;
    }

    public void LoginScreen()
    {
        var vm = new LoginViewModel();

        Observable.Merge(
            vm.Ok,
            vm.Cancel
            .Select(_ => (UserModel?)null))
            .Take(1)
            .Subscribe(model =>
            {
                if (model != null)
                {
                    LoggedInUser.Username = model.Username;
                }
                else
                {
                    Environment.Exit(0);
                }
            });
    }

    public ViewModelBase Content
    {
        get => _content;
        set => this.RaiseAndSetIfChanged(ref _content, value);
    }

    public UserModel LoggedInUser
    {
        get => _loggedInUser;
        set => this.RaiseAndSetIfChanged(ref _loggedInUser, value);
    }
}