try:
    from .base_engine import *
except ImportError:
    from base_engine import *
import re


class FFMPEG(BaseRenderEngine):

    def version(self):
        version = None
        try:
            ver_out = subprocess.check_output([self.renderer_path(), '-version'],
                                              timeout=SUBPROCESS_TIMEOUT).decode('utf-8')
            match = re.match(".*version\s*(\S+)\s*Copyright", ver_out)
            if match:
                version = match.groups()[0]
        except Exception as e:
            logger.error("Failed to get FFMPEG version: {}".format(e))
        return version

    def get_encoders(self):
        raw_stdout = subprocess.check_output([self.renderer_path(), '-encoders'], stderr=subprocess.DEVNULL,
                                             timeout=SUBPROCESS_TIMEOUT).decode('utf-8')
        pattern = '(?P<type>[VASFXBD.]{6})\s+(?P<name>\S{2,})\s+(?P<description>.*)'
        encoders = [m.groupdict() for m in re.finditer(pattern, raw_stdout)]
        return encoders

    def get_formats(self):
        encoders = [x['name'] for x in self.get_all_formats() if 'E' in x['type']]
        return encoders

    def get_all_formats(self):
        formats_raw = subprocess.check_output([self.renderer_path(), '-formats'], stderr=subprocess.DEVNULL,
                                             timeout=SUBPROCESS_TIMEOUT).decode('utf-8')
        pattern = '(?P<type>[DE]{1,2})\s+(?P<id>\S{2,})\s+(?P<name>.*)'
        all_formats = [m.groupdict() for m in re.finditer(pattern, formats_raw)]
        return all_formats

    def extension_for_format(self, ffmpeg_format):
        # Extract the common extension using regex
        muxer_flag = 'muxer' if 'E' in ffmpeg_format['type'] else 'demuxer'
        format_detail_raw = subprocess.check_output(
            [self.renderer_path(), '-hide_banner', '-h', f"{muxer_flag}={ffmpeg_format['id']}"]).decode('utf-8')
        pattern = r"Common extensions: (\w+)"
        common_extensions = re.findall(pattern, format_detail_raw)
        found_extensions = []
        if common_extensions:
            found_extensions = common_extensions[0].split(',')
        return found_extensions

    def get_output_formats(self):
        return [x for x in self.get_all_formats() if 'E' in x['type'].upper()]

    def get_frame_count(self, path_to_file):
        raw_stdout = subprocess.check_output([self.default_renderer_path(), '-i', path_to_file, '-map', '0:v:0', '-c', 'copy',
                                               '-f', 'null', '-'], stderr=subprocess.STDOUT,
                                              timeout=SUBPROCESS_TIMEOUT).decode('utf-8')
        match = re.findall(r'frame=\s*(\d+)', raw_stdout)
        if match:
            frame_number = int(match[-1])
            return frame_number

    def get_arguments(self):
        help_text = subprocess.check_output([self.renderer_path(), '-h', 'long'], stderr=subprocess.STDOUT).decode('utf-8')
        lines = help_text.splitlines()

        options = {}
        current_category = None

        for line in lines:
            line = line.strip()

            if line.endswith(":") and "options" in line.lower():
                current_category = line.split('options')[0].strip()
                options[current_category] = {}
            elif line:  # Ignore blank lines
                split_line = line.split(' ', 2)
                flag = split_line[0]
                argument = split_line[1] if len(split_line) > 1 else ''
                description = split_line[2] if len(split_line) > 2 else ''

                if current_category:
                    name = flag.strip('-')
                    options[current_category][name] = {
                        'flag': flag, 'description': description.strip(), 'takes_argument': bool(argument)
                    }
        return options


if __name__ == "__main__":
    print(FFMPEG().get_all_formats())