// cxx-api-examples/kokoro-tts-zh-en-cxx-api.c
//
// Copyright (c)  2025  Xiaomi Corporation

// This file shows how to use sherpa-onnx CXX API
// for Chinese + English TTS with Kokoro.
//
// clang-format off
/*
Usage

wget https://github.com/k2-fsa/sherpa-onnx/releases/download/tts-models/kokoro-multi-lang-v1_0.tar.bz2
tar xf kokoro-multi-lang-v1_0.tar.bz2
rm kokoro-multi-lang-v1_0.tar.bz2

./kokoro-tts-zh-en-cxx-api

 */
// clang-format on

#include <string>

#include "sherpa-onnx/c-api/cxx-api.h"

static int32_t ProgressCallback(const float *samples, int32_t num_samples,
                                float progress, void *arg) {
  fprintf(stderr, "Progress: %.3f%%\n", progress * 100);
  // return 1 to continue generating
  // return 0 to stop generating
  return 1;
}

int32_t main(int32_t argc, char *argv[]) {
  using namespace sherpa_onnx::cxx;  // NOLINT
  OfflineTtsConfig config;

  config.model.kokoro.model = "./kokoro-multi-lang-v1_0/model.onnx";
  config.model.kokoro.voices = "./kokoro-multi-lang-v1_0/voices.bin";
  config.model.kokoro.tokens = "./kokoro-multi-lang-v1_0/tokens.txt";
  config.model.kokoro.data_dir = "./kokoro-multi-lang-v1_0/espeak-ng-data";
  config.model.kokoro.dict_dir = "./kokoro-multi-lang-v1_0/dict";
  config.model.kokoro.lexicon =
      "./kokoro-multi-lang-v1_0/lexicon-us-en.txt,./kokoro-multi-lang-v1_0/"
      "lexicon-zh.txt";

  config.model.num_threads = 2;

  // If you don't want to see debug messages, please set it to 0
  config.model.debug = 1;

  std::string filename = "./generated-kokoro-zh-en-cxx.wav";
  std::string text =
      "中英文语音合成测试。This is generated by next generation Kaldi using "
      "Kokoro without Misaki. 你觉得中英文说的如何呢？";

  auto tts = OfflineTts::Create(config);
  int32_t sid = 50;
  float speed = 1.0;  // larger -> faster in speech speed

#if 0
  // If you don't want to use a callback, then please enable this branch
  GeneratedAudio audio = tts.Generate(text, sid, speed);
#else
  GeneratedAudio audio = tts.Generate(text, sid, speed, ProgressCallback);
#endif

  WriteWave(filename, {audio.samples, audio.sample_rate});

  fprintf(stderr, "Input text is: %s\n", text.c_str());
  fprintf(stderr, "Speaker ID is is: %d\n", sid);
  fprintf(stderr, "Saved to: %s\n", filename.c_str());

  return 0;
}