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

namespace MAF1.Workflows;

/// <summary>
/// 边条件模式：这里只解析，不做 if。走哪条边由 AddEdge 的 condition 决定。
/// </summary>
internal sealed class CityParseExecutor() : ChatProtocolExecutor(
    "CityParse",
    new ChatProtocolExecutorOptions { AutoSendTurnToken = false })
{
    protected override ProtocolBuilder ConfigureProtocol(ProtocolBuilder builder)
    {
        return base.ConfigureProtocol(builder).SendsMessage<CityExtraction>();
    }

    protected override async ValueTask TakeTurnAsync(
        List<ChatMessage> messages,
        IWorkflowContext context,
        bool? emitEvents,
        CancellationToken cancellationToken)
    {
        string text = string.Join(
            Environment.NewLine,
            messages
                .Where(message => !string.IsNullOrWhiteSpace(message.Text))
                .Select(message => message.Text));

        await context.SendMessageAsync(FileCityAgent.Parse(text), cancellationToken: cancellationToken);
    }
}