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

// This file shows how to use sherpa-onnx C API
// for English + Chinese 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-c-api

 */
// clang-format on

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

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

static int32_t ProgressCallback(const float *samples, int32_t num_samples,
                                float progress) {
  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[]) {
  SherpaOnnxOfflineTtsConfig config;
  memset(&config, 0, sizeof(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;

  const char *filename = "./generated-kokoro-zh-en.wav";
  const char *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？";

  const SherpaOnnxOfflineTts *tts = SherpaOnnxCreateOfflineTts(&config);
  int32_t sid = 0;    // there are 53 speakers
  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
  const SherpaOnnxGeneratedAudio *audio =
      SherpaOnnxOfflineTtsGenerate(tts, text, sid, speed);
#else
  const SherpaOnnxGeneratedAudio *audio =
      SherpaOnnxOfflineTtsGenerateWithProgressCallback(tts, text, sid, speed,
                                                       ProgressCallback);
#endif

  SherpaOnnxWriteWave(audio->samples, audio->n, audio->sample_rate, filename);

  SherpaOnnxDestroyOfflineTtsGeneratedAudio(audio);
  SherpaOnnxDestroyOfflineTts(tts);

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

  return 0;
}