/*
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 * All rights reserved.
 *
 * This source code is licensed under the license found in the
 * LICENSE file in the root directory of this source tree.
 */

using Meta.WitAi.Attributes;
using Meta.WitAi.Json;
using Meta.WitAi.Utilities;
using UnityEngine;
using Utilities;

namespace Meta.WitAi.CallbackHandlers
{
    /// <summary>
    /// Triggers an event when no intents were recognized in an utterance.
    /// </summary>
    [AddComponentMenu("Wit.ai/Response Matchers/Out Of Domain")]
    public class OutOfScopeUtteranceHandler : WitResponseHandler
    {
        [Space(WitRuntimeStyles.HeaderPaddingTop)]
        [TooltipBox("Triggered when a activation on the associated AppVoiceExperience does not return any intents.")]
        [SerializeField] private StringEvent onOutOfDomain = new StringEvent();

        protected override string OnValidateResponse(WitResponseNode response, bool isEarlyResponse)
        {
            if (response == null)
            {
                return "Response is null";
            }
            if (response["intents"].Count > 0)
            {
                return "Intents found";
            }
            return string.Empty;
        }
        protected override void OnResponseInvalid(WitResponseNode response, string error) {}
        protected override void OnResponseSuccess(WitResponseNode response)
        {
            onOutOfDomain?.Invoke(response.GetTranscription());
        }
    }
}