using System.Text.Json.Nodes;
using Microsoft.Extensions.AI;

namespace MeetingAssistant.Summary;

internal static class FunctionInvocationGuard
{
    public static ValueTask<object?> InvokeAsync(
        FunctionInvocationContext context,
        CancellationToken cancellationToken)
    {
        if (context.CallContent.Exception is not null)
        {
            return ValueTask.FromResult<object?>(new JsonObject
            {
                ["error"] = new JsonObject
                {
                    ["code"] = "invalid_tool_arguments",
                    ["message"] = "Tool arguments must be a valid JSON object."
                }
            });
        }

        return context.Function.InvokeAsync(context.Arguments, cancellationToken);
    }
}