using ClaudeDo.Worker.Runner.Interfaces;

namespace ClaudeDo.Worker.Tests.Infrastructure;

public sealed class FakeClaudeStreamTransport : IClaudeStreamTransport
{
    public List<string> Written { get; } = [];
    public bool Killed { get; private set; }
    public bool Started { get; private set; }

    public event Func<string, Task>? LineReceived;
    public event Func<string, Task>? StderrReceived;

    public Task StartAsync(IReadOnlyList<string> args, string workingDirectory, CancellationToken ct)
    {
        Started = true;
        return Task.CompletedTask;
    }

    public Task WriteLineAsync(string jsonLine, CancellationToken ct)
    {
        Written.Add(jsonLine);
        return Task.CompletedTask;
    }

    public void Kill() => Killed = true;

    public Task WaitForExitAsync() => Task.CompletedTask;

    public ValueTask DisposeAsync() => ValueTask.CompletedTask;

    // Test helper: push a simulated stdout line to all LineReceived subscribers.
    public async Task PushLineAsync(string line)
    {
        var handler = LineReceived;
        if (handler is not null)
            await handler(line);
    }

    // Test helper: push a simulated stderr line.
    public async Task PushStderrAsync(string line)
    {
        var handler = StderrReceived;
        if (handler is not null)
            await handler(line);
    }
}