#include <pybind11/pybind11.h>
#include <pybind11/numpy.h>

#include "kaldi_feature_wrapper.h"

namespace py=pybind11;

bool InitFbank(
    float samp_freq, // frame opts 
    float frame_shift_ms,
    float frame_length_ms,
    float dither,
    float preemph_coeff,
    bool remove_dc_offset,
    std::string window_type, // e.g. Hamming window
    bool round_to_power_of_two,
    float blackman_coeff,
    bool snip_edges,
    bool allow_downsample,
    bool allow_upsample,
    int max_feature_vectors,
    int num_bins, // mel opts
    float low_freq,
    float high_freq,
    float vtln_low,
    float vtln_high,
    bool debug_mel,
    bool htk_mode,
    bool use_energy, // fbank opts
    float energy_floor,
    bool raw_energy,
    bool htk_compat,
    bool use_log_fbank,
    bool use_power) {
    kaldi::FbankOptions opts;
    opts.frame_opts.samp_freq = samp_freq; // frame opts
    opts.frame_opts.frame_shift_ms = frame_shift_ms;
    opts.frame_opts.frame_length_ms = frame_length_ms;
    opts.frame_opts.dither = dither;
    opts.frame_opts.preemph_coeff = preemph_coeff;
    opts.frame_opts.remove_dc_offset = remove_dc_offset;
    opts.frame_opts.window_type = window_type; 
    opts.frame_opts.round_to_power_of_two = round_to_power_of_two;
    opts.frame_opts.blackman_coeff = blackman_coeff;
    opts.frame_opts.snip_edges = snip_edges;
    opts.frame_opts.allow_downsample = allow_downsample;
    opts.frame_opts.allow_upsample = allow_upsample;
    opts.frame_opts.max_feature_vectors = max_feature_vectors;

    opts.mel_opts.num_bins = num_bins; // mel opts
    opts.mel_opts.low_freq = low_freq;
    opts.mel_opts.high_freq = high_freq;
    opts.mel_opts.vtln_low = vtln_low;
    opts.mel_opts.vtln_high = vtln_high;
    opts.mel_opts.debug_mel = debug_mel;
    opts.mel_opts.htk_mode = htk_mode;

    opts.use_energy = use_energy; // fbank opts
    opts.energy_floor = energy_floor;
    opts.raw_energy = raw_energy;
    opts.htk_compat = htk_compat;
    opts.use_log_fbank = use_log_fbank;
    opts.use_power = use_power;
    paddleaudio::KaldiFeatureWrapper::GetInstance()->InitFbank(opts);
    return true;
}

py::array_t<double> ComputeFbankStreaming(const py::array_t<double>& wav) {
  return paddleaudio::KaldiFeatureWrapper::GetInstance()->ComputeFbank(wav);
}

py::array_t<double> ComputeFbank(
    float samp_freq, // frame opts 
    float frame_shift_ms,
    float frame_length_ms,
    float dither,
    float preemph_coeff,
    bool remove_dc_offset,
    std::string window_type, // e.g. Hamming window
    bool round_to_power_of_two,
    float blackman_coeff,
    bool snip_edges,
    bool allow_downsample,
    bool allow_upsample,
    int max_feature_vectors,
    int num_bins, // mel opts
    float low_freq,
    float high_freq,
    float vtln_low,
    float vtln_high,
    bool debug_mel,
    bool htk_mode,
    bool use_energy, // fbank opts
    float energy_floor,
    bool raw_energy,
    bool htk_compat,
    bool use_log_fbank,
    bool use_power, 
    const py::array_t<double>& wav) {
   InitFbank(samp_freq, // frame opts 
    frame_shift_ms,
    frame_length_ms,
    dither,
    preemph_coeff,
    remove_dc_offset,
    window_type, // e.g. Hamming window
    round_to_power_of_two,
    blackman_coeff,
    snip_edges,
    allow_downsample,
    allow_upsample,
    max_feature_vectors,
    num_bins, // mel opts
    low_freq,
    high_freq,
    vtln_low,
    vtln_high,
    debug_mel,
    htk_mode,
    use_energy, // fbank opts
    energy_floor,
    raw_energy,
    htk_compat,
    use_log_fbank,
    use_power); 
   py::array_t<double> result = ComputeFbankStreaming(wav);
   paddleaudio::KaldiFeatureWrapper::GetInstance()->ResetFbank();
   return result;
}


void ResetFbank() {
   paddleaudio::KaldiFeatureWrapper::GetInstance()->ResetFbank();
}

PYBIND11_MODULE(kaldi_featurepy, m) {
    m.doc() = "kaldi_feature example";
    m.def("InitFbank", &InitFbank, "init fbank");
    m.def("ResetFbank", &ResetFbank, "reset fbank");
    m.def("ComputeFbank", &ComputeFbank, "compute fbank");
    m.def("ComputeFbankStreaming", &ComputeFbankStreaming, "compute fbank streaming");
}