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

from PyTeX.formatter import Formatter
from PyTeX.utils import ensure_file_integrity
from PyTeX.errors import FileNotGeneratedFromDTXFileError, LatexMKError


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)
        try:
            result = subprocess.run(['latexmk', '-gg', '-output-directory=/tmp'], cwd=str(input_path.parent),
                                      stdout=subprocess.DEVNULL,
                                      stderr=subprocess.DEVNULL
                                      )
        except subprocess.CalledProcessError:
            raise LatexMKError(self.filename)
        if not result:
            pass
        sty_file = (Path('/tmp') / input_path.with_suffix('.sty').name)
        if sty_file.exists():
            sty = sty_file.read_text()
        else:
            raise FileNotGeneratedFromDTXFileError(self.filename, 'style')
        output_dir.mkdir(parents=True, exist_ok=True)
        (output_dir / self.filename).write_text(sty)
        return [self.filename]