#!/usr/bin/env python3
"""Пути к установленному MAME; исходники fork приложению не нужны."""
from __future__ import annotations

from dataclasses import dataclass
import os
from pathlib import Path


@dataclass(frozen=True)
class MameProfile:
    home: Path | None
    binary: Path | None
    rompath: Path | None
    dss_image: Path | None
    system_hdd_image: Path | None
    bios: str

    @classmethod
    def resolve(cls, overrides: dict[str, str | None] | None = None) -> "MameProfile":
        values = dict(os.environ)
        values.update({key: value for key, value in (overrides or {}).items()
                       if value is not None})
        home = _path(values.get("MAME_HOME"))

        def selected(key: str, suffix: str) -> Path | None:
            return _path(values.get(key)) or (home / suffix if home else None)

        return cls(home=home,
                   binary=selected("MAME_BIN", "mame.arm"),
                   rompath=selected("MAME_ROMPATH", "roms"),
                   dss_image=selected("MAME_DSS_IMAGE", "IMG/dss171u.img"),
                   system_hdd_image=selected("MAME_SYSTEM_HDD_IMAGE", "IMG/sp_hdd_sys.chd"),
                   bios=values.get("MAME_BIOS") or "v3.06")

    def validate(self, *, dss: bool = False, system_hdd: bool = True) -> None:
        paths = {"MAME_BIN": self.binary, "MAME_ROMPATH": self.rompath}
        if dss:
            paths["MAME_DSS_IMAGE"] = self.dss_image
        if system_hdd:
            paths["MAME_SYSTEM_HDD_IMAGE"] = self.system_hdd_image
        for variable, path in paths.items():
            if path is None:
                raise ValueError(f"задайте MAME_HOME или {variable}")
            if not path.exists():
                raise ValueError(f"{variable}: файл/каталог не найден: {path}")
        if self.binary and not self.binary.is_file():
            raise ValueError(f"MAME_BIN не является файлом: {self.binary}")
        if self.rompath and not self.rompath.is_dir():
            raise ValueError(f"MAME_ROMPATH не является каталогом: {self.rompath}")


def _path(value: str | None) -> Path | None:
    if not value:
        return None
    return Path(os.path.expanduser(value)).resolve()


def add_arguments(parser) -> None:
    """Одинаковые аргументы для обычного запуска, автотеста и DAP."""
    for option in ("mame-home", "mame-bin", "mame-rompath", "mame-dss-image",
                   "mame-system-hdd-image", "mame-bios"):
        parser.add_argument("--" + option, default=None)


def from_arguments(args) -> MameProfile:
    names = ("MAME_HOME", "MAME_BIN", "MAME_ROMPATH", "MAME_DSS_IMAGE",
             "MAME_SYSTEM_HDD_IMAGE", "MAME_BIOS")
    return MameProfile.resolve({name: getattr(args, name.lower(), None)
                                for name in names})


def write_keyboard_config(cfg_directory: Path) -> None:
    """Включить обе клавиатуры Sprinter, включая прямой ввод в DSS."""
    cfg_directory.mkdir(parents=True, exist_ok=True)
    (cfg_directory / "sprinter.cfg").write_text(
        '<?xml version="1.0"?>\n'
        '<mameconfig version="10">\n'
        '  <system name="sprinter">\n'
        '    <input>\n'
        '      <keyboard tag=":" enabled="1" />\n'
        '      <keyboard tag=":kbd:ms_naturl" enabled="1" />\n'
        '    </input>\n'
        '  </system>\n'
        '</mameconfig>\n', encoding="utf-8")