import moviepy.editor as mp


def get_subclips(source_video_path, moments):
    vid = mp.VideoFileClip(source_video_path)
    clips = []
    for m in moments:
        clips.append(vid.subclip(m.start, m.stop))
    return clips, vid


def render_moments(moments, input_video_path, output_path, intro_path=None, outro_path=None, parallelism=1):
    clips, _ = get_subclips(input_video_path, moments)
    if intro_path is not None:
        size = clips[0].size
        iclip = mp.VideoFileClip(intro_path)
        iclip.resize(height=size[1])
        clips.insert(0, iclip)
    composite = mp.concatenate_videoclips(clips, method='compose')
    composite.write_videofile(output_path, logger=None, threads=parallelism)


def filter_moments(moments, min_length, max_length):
    return [m for m in moments if m.get_duration() > min_length and m.get_duration() < max_length]