using Nonemm.Digital;

namespace Nonemm.Digital.Tests;

/// A bridge that goes nowhere: the test reads what was sent to it and says what
/// comes back.
public sealed class FakeBridge : BridgeChannel
{
    private readonly List<string> sent = [];

    public bool IsStarted { get; private set; }

    public IReadOnlyList<string> Sent
    {
        get
        {
            lock (sent)
            {
                return sent.ToArray();
            }
        }
    }

    public event EventHandler<string>? LineReceived;

    public event EventHandler<string>? Failed;

    public Task StartAsync(CancellationToken cancellation = default)
    {
        IsStarted = true;
        return Task.CompletedTask;
    }

    public Task SendAsync(string line, CancellationToken cancellation = default)
    {
        lock (sent)
        {
            sent.Add(line);
        }
        return Task.CompletedTask;
    }

    public Task<string> ToWindowsPathAsync(string path, CancellationToken cancellation = default) =>
        Task.FromResult("Z:" + path.Replace('/', '\\'));

    public void Say(string verb, params string[] fields) =>
        LineReceived?.Invoke(this, BridgeLine.Write(verb, fields));

    public void Stop(string why) => Failed?.Invoke(this, why);

    public void Dispose()
    {
    }
}