@page "/counter"
@using System.Diagnostics

<PageTitle>Counter</PageTitle>

<h1>Counter</h1>

<p role="status">Current count: @_currentCount</p>
<p role="status">Runtime: @_stopwatch.Elapsed.ToString("g")</p>


<button class="btn btn-primary" @onclick="Start">Start</button>
<button class="btn btn-primary" @onclick="Stop">Stop</button>
<button class="btn btn-primary" @onclick="Reset">Reset</button>

@code {
    private int _currentCount = 0;
    private bool _cancel;
    private readonly Stopwatch _stopwatch = new();
    
    private async Task Start()
    {
        _stopwatch.Start();
        _cancel = false;
        while (!_cancel)
        {
            _currentCount++;
            StateHasChanged();
            await Task.Delay(10);
        }
        _stopwatch.Stop();
    }

    private void Stop()
    {
        _cancel = true;
    }

    private void Reset()
    {
        _cancel = true;
        _currentCount = 0;
        _stopwatch.Reset();
    }
}