from pathlib import Path
from typing import Dict, Optional, List
import subprocess

from PyTeX.formatter import Formatter
from PyTeX.utils import ensure_file_integrity


class DocstripFormatter(Formatter):
    def __init__(self, name: str):
        self.name = name
        self.filename = self.name + '.sty'
        Formatter.__init__(self)

    def expected_file_name(self) -> str:
        return self.filename

    def format_file(self, input_path: Path, output_dir: Path,
                    relative_name: Optional[str] = None,
                    last_build_info: Optional[List[Dict]] = None) -> List[str]:
        ensure_file_integrity(output_dir / self.filename, str(Path(relative_name).parent / self.filename), last_build_info)
        result = subprocess.Popen(['pdflatex', self.name + '.dtx'], cwd=str(input_path.parent),
                                  stdout=subprocess.DEVNULL,
                                  stderr=subprocess.DEVNULL
                                  )
        if not result:
            pass
        sty = input_path.with_suffix('.sty').read_text()
        output_dir.mkdir(parents=True, exist_ok=True)
        (output_dir / self.filename).write_text(sty)
        return [self.filename]