import tempfile
from pathlib import Path

import moviepy.editor as mp
import numpy as np
import scipy.io.wavfile as wav


def extract_audio_from_video(video_path: str, filename: str):
    tempdir = tempfile.gettempdir()

    dest_location = f"{tempdir}/{filename}.wav"
    if Path(dest_location).is_file():
        return dest_location, True

    vid = mp.VideoFileClip(video_path)
    vid.audio.write_audiofile(dest_location, logger=None)
    vid.close()
    return dest_location, False


def process_audio(source_audio_path):
    rate, data_raw = wav.read(source_audio_path)
    data_raw = data_raw.astype(np.int32)
    mono = (data_raw[:, 0] + data_raw[:, 1]) / 2
    duration = len(mono) / rate
    return mono, duration, rate


def resample(data: np.ndarray, factor: int) -> np.ndarray:
    return data[::factor].copy()