import os
import tempfile
import ffmpeg
from .files import filename


def get_audio(paths: list, audio_channel_index: int, sample_interval: list):
    temp_dir = tempfile.gettempdir()

    audio_paths = {}

    for path in paths:
        print(f"Extracting audio from {filename(path)}...")
        output_path = os.path.join(temp_dir, f"{filename(path)}.wav")

        ffmpeg_input_args = {}
        if sample_interval is not None:
            ffmpeg_input_args['ss'] = str(sample_interval[0])

        ffmpeg_output_args = {}
        ffmpeg_output_args['acodec'] = "pcm_s16le"
        ffmpeg_output_args['ac'] = "1"
        ffmpeg_output_args['ar'] = "16k"
        ffmpeg_output_args['map'] = "0:a:" + str(audio_channel_index)
        if sample_interval is not None:
            ffmpeg_output_args['t'] = str(
                sample_interval[1] - sample_interval[0])

        ffmpeg.input(path, **ffmpeg_input_args).output(
            output_path,
            **ffmpeg_output_args
        ).run(quiet=True, overwrite_output=True)

        audio_paths[path] = output_path

    return audio_paths


def add_subtitles_to_mp4(subtitles: dict):
    
    input_file = list(subtitles.keys())[0]
    subtitle_file = subtitles[input_file]
    output_file = input_file
    os.rename(input_file, input_file+'_edit')

    input_stream = ffmpeg.input(input_file+'_edit')
    subtitle_stream = ffmpeg.input(subtitle_file)

    # Combine input video and subtitle
    output = ffmpeg.output(input_stream, subtitle_stream, output_file.replace('.mkv','.mp4'), c='copy', **{'c:s': 'mov_text'}, **{'metadata:s:s:0': 'language=eng'})
    ffmpeg.run(output, quiet=True, overwrite_output=True)
    os.remove(input_file+'_edit')
    # remove tempfiles
    os.remove(subtitle_file)
    os.remove(subtitle_file.replace(".srt",".wav"))