using System;
using System.Reactive;
using System.Reactive.Linq;
using EinmaleinsTrainer.Models;
using ReactiveUI;

namespace EinmaleinsTrainer.ViewModels;

public class ResultViewModel : ViewModelBase
{
    public string Text { get; private set;} = "";
    public string TimeRequiredText { get; private set;} = "";
    public bool ShowTimeRequired => !string.IsNullOrEmpty(TimeRequiredText);

    private ResultModel _model = new();
    public void Init(ResultModel result)
    {
        double percent = result.Score * 1.0 / result.Total;
        if (percent > 0.9)
        {
            Text = $"🎉 {result.Score} von {result.Total} richtig!";
        }
        else if (percent > 0.5)
        {
            Text = $"👍 {result.Score} von {result.Total} richtig.";
        }
        else if (percent > 0.25)
        {
            Text = $"🤨 {result.Score} von {result.Total} richtig.";
        }
        else if (percent > 0.0)
        {
            Text = $"😑 {result.Score} von {result.Total} richtig.";
        }
        else
        {
            Text = $"😭 {result.Score} von {result.Total} richtig.";
        }
        if (result.TimeRequired != null)
        {
            int SecondsRequired = (int)Math.Round(result.TimeRequired.Value.TotalSeconds, 0, MidpointRounding.AwayFromZero);
            TimeRequiredText = $"In {SecondsRequired} s gelöst.";
        }
        else
        {
            TimeRequiredText = "";
        }
        _model = result;
    }

    public ReactiveCommand<Unit, ResultModel> RestartCommand { get; }

    public ResultViewModel()
    {
        RestartCommand = ReactiveCommand.Create(
            execute: () =>
            {
                return _model;
            },
            canExecute: Observable.Return(true).ObserveOn(RxApp.MainThreadScheduler),
            outputScheduler: RxApp.MainThreadScheduler);
    }
}