import re
import subprocess

from vse_toolbox.constants import AUTO_SPLITTER_LOG
from vse_toolbox import file_utils


class AutoSplitter(object):

    def __init__(self, path, fps=None):

        self.path = path
        self.fps = fps

        self.log_path = AUTO_SPLITTER_LOG

    def launch_analysis(self, threshold=0.6):

        ffmpeg_cmd = f"ffmpeg -i {str(self.path)} -filter:v \"select='gt(scene,{threshold})',showinfo\" -f null - 2> {str(self.log_path)}"
        print(ffmpeg_cmd)

        subprocess.call(ffmpeg_cmd, shell=True)

    def get_split_times(self, as_frame=True):
        log = file_utils.read_file(self.log_path)

        timecodes = re.findall(r'pts_time:([\d.]+)', log)

        if as_frame:
            # convert timecode to frame number
            if not self.fps:
                self.fps = float(re.findall(r'([\d]+) fps', log)[0])

            return [round(float(time) * self.fps) for time in timecodes]

        return timecodes