using Microsoft.Extensions.Options;
using SherpaOnnx;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using VideoAnalysisCore.Common;

namespace VideoAnalysisCore.AICore.SherpaOnnx
{
    public  class SenseVoice
    {
        static OfflineRecognizer OR =default!;
        /// <summary>
        /// 初始化 SenseVoice
        /// </summary>
        /// <param name="speakerNumber"></param>
        /// <param name="threshold"></param>
        public static void Init(int speakerNumber = 0, double threshold = 0.6)
        {
            OfflineRecognizerConfig config = new OfflineRecognizerConfig();
            //采样率
            config.FeatConfig.SampleRate = 16000;
            //用于训练模型的特征维度
            config.FeatConfig.FeatureDim = 80;
            //Path to tokens.txt
            config.ModelConfig.Tokens = Path.Combine(AppCommon.AIModelFile, "sherpa-onnx-sense-voice-24-07-17", "tokens.txt");
            //SenseVoice 模型
            config.ModelConfig.SenseVoice.Model = Path.Combine(AppCommon.AIModelFile, "sherpa-onnx-sense-voice-24-07-17", "model.onnx");
            //1 使用逆文本规范化处理感官语音。
            config.ModelConfig.SenseVoice.UseInverseTextNormalization =1;
            //模型类型
            config.ModelConfig.ModelType = string.Empty;

            #region 有效的解码方法
            //贪婪搜索[greedy_search] 改进的波束搜索 [modified_beam_search]
            //贪婪搜索
            config.DecodingMethod = "greedy_search";

            ////改进的波束搜索
            //config.DecodingMethod = "modified_beam_search";
            ////仅在 --decoding--method 为 [波束搜索]modified_beam_search 时使用。
            ////它指定搜索过程中要保留的活动路径数
            //config.MaxActivePaths =4;
            #endregion

            //热词目录
            config.HotwordsFile = string.Empty;
            //热词得分
            config.HotwordsScore =1.5f ;
            //反转文本规范化规则 fst 的路径
            config.RuleFsts =  string.Empty;

            config.ModelConfig.Debug = 0;

            OR = new OfflineRecognizer(config);
        }
        /// <summary>
        /// 获取语音字幕
        /// </summary>
        /// <param name="task"></param>
        /// <returns></returns>
        public static async Task RunTask(string task)
        {
            var filePath = Path.Combine(task.LocalPath(), task + ".wav");
            if (string.IsNullOrEmpty(filePath) || !File.Exists(filePath))
                throw new Exception("task 音频路径未找到");
            OfflineStream stream = OR.CreateStream();
            WaveReader waveReader = new WaveReader(filePath);
            stream.AcceptWaveform(waveReader.SampleRate, waveReader.Samples);
            OR.Decode(stream);

            var r = stream.Result;
            Console.WriteLine("--------------------");
            Console.WriteLine("Text: {0}", r.Text);
            Console.WriteLine("Tokens: [{0}]", string.Join(", ", r.Tokens));
            if (r.Timestamps != null && r.Timestamps.Length > 0)
            {
                Console.Write("Timestamps: [");
                var sep = "";
                for (int k = 0; k != r.Timestamps.Length; ++k)
                {
                    Console.Write("{0}{1}", sep, r.Timestamps[k].ToString("0.00"));
                    sep = ", ";
                }
                Console.WriteLine("]");
            }
            await Task.CompletedTask;
        }
    }
}