from .constants import INS_FILE, DRV_FILE
from .enums import TeXFlavour, FormatterProperty, TeXType, FormatterMode
from .generic_text import GenericText
from .tex_formatter import TexFormatter
from typing import List, Tuple
from pathlib import Path
from .formatting_config import FormattingConfig


class DTXFormatter(TexFormatter):
    @property
    def dependencies(self) -> List[str]:
        return []  # TODO

    def future_config(self) -> List[Tuple[str, FormattingConfig]]:
        return []  # TODO

    @property
    def output_files(self) -> List[str]:
        files = [self.name + '.dtx']
        if self.config.include_drv:
            files.append(self.name + '.drv')
        if self.config.include_ins:
            files.append(self.name + '.ins')
        return files

    def _get_internal_file(self) -> str:
        g = GenericText(INS_FILE)
        switcher = {
            TeXType.TeXPackage: '.sty',
            TeXType.TeXClass: '.cls'
        }
        return g.format(
            infile=self.name + '.dtx',
            outfile=self.name + switcher[self.config.tex_out_type],
            preamble='',  # TODO
            postamble='',  # TODO
            guards=', '.join(self.config.docstrip_guards)
        )

    def _get_drv_file(self) -> str:
        g = GenericText(DRV_FILE)
        return g.format(
            documentclass='l3doc',  # TODO
            preamble='',  # TODO
            infile=self.name + '.dtx',
        )

    def format_pre_header(self) -> None:
        self._shipout_line(r'% \iffalse meta-comment')

    def format_post_header(self) -> None:
        self._shipout_line('%</internal>')
        self._shipout_line(
            self._get_internal_file()
        )
        self._shipout_line('%')
        self._shipout_line(
            '%<{outtype}>{provides}'.format(
                outtype=self.config.tex_out_type.value,
                provides=self._get_provides_text()
            )
        )
        self._shipout_line('%')
        self._shipout_line('%<*driver>')
        self._shipout_line(
            self._get_drv_file()
        )
        self._shipout_line('%</driver>')
        self._shipout_line(r'% \fi')
        self._shipout_line('%')
        self.mode = FormatterMode.meta
        pass

    def _post_process_line(self, line: str) -> str:
        line = line.rstrip(' %\n')
        if self.mode == FormatterMode.meta:
            line = '% ' + line
        if self.mode == FormatterMode.macrocode:
            if self.config.tex_flavour == TeXFlavour.LaTeX2e:
                line = line.rstrip(' %\n') + '%'
        return line