using System;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.Extensions.AI;
namespace OnDeviceAgent.AgentCore
{

    public sealed class SetVoiceTool : AgentToolBase
    {
        readonly Func<string, CancellationToken, Task<string>> m_Apply;

        public SetVoiceTool(Func<string, CancellationToken, Task<string>> apply)
        {
            m_Apply = apply;
        }

        public override string Name => "SetVoice";
        public override string Description =>
            "Switch the assistant's spoken voice between male and female. Use when the user asks to change voice (e.g. 'use a male voice', '남자 목소리로 바꿔줘', '여자 목소리로 바꿔줘'). Pass gender as 'male' or 'female'.";

        public override AITool ToAIFunction(AgentToolContext context)
        {
            Task<string> Run([System.ComponentModel.Description("the requested voice gender: 'male' or 'female'")] string gender)
            {
                var argsJson = "{\"gender\":\"" + (gender ?? string.Empty).Replace("\"", "'") + "\"}";
                Func<Task<string>> body = m_Apply == null ? null : () => m_Apply(gender, context.CancellationToken);
                return RunGuarded(context, argsJson, body, "Voice switching is not configured.");
            }
            return AIFunctionFactory.Create((Func<string, Task<string>>)Run, name: Name, description: Description);
        }
    }
}