using MAF1.Agents.FileCity;
using Microsoft.Agents.AI.Workflows;

namespace MAF1.Workflows;

/// <summary>
/// 只有「没有城市」那条边会进到这里，所以这里不再判断。
/// </summary>
internal sealed class SkipWeatherExecutor() : Executor<CityExtraction>("SkipWeather")
{
    protected override ProtocolBuilder ConfigureProtocol(ProtocolBuilder builder)
    {
        return base.ConfigureProtocol(builder).YieldsOutput<string>();
    }

    public override async ValueTask HandleAsync(
        CityExtraction extraction,
        IWorkflowContext context,
        CancellationToken cancellationToken = default)
    {
        string reason = string.IsNullOrWhiteSpace(extraction.Reason)
            ? "文件里没有可查询的城市。"
            : extraction.Reason;
        await context.YieldOutputAsync(
            $"没有有效城市，工作流结束，不执行 WeatherAgent。{reason}",
            cancellationToken);
    }
}