#!/usr/bin/env python3

import json
from dataclasses import dataclass
from pathlib import Path


def normalized_path(path: str) -> str:
    return path.replace("\\", "/").casefold()


@dataclass(frozen=True)
class PatchLayout:
    repository_patches: frozenset[str]
    graphics_patches: frozenset[str]

    def is_repository_patch(self, path: str) -> bool:
        return normalized_path(path) in self.repository_patches

    def is_graphics_patch(self, path: str) -> bool:
        return normalized_path(path) in self.graphics_patches

    def is_external_graphics_patch(self, path: str) -> bool:
        key = normalized_path(path)
        return key in self.graphics_patches and key not in self.repository_patches


def load_patch_layout(path: Path | None = None) -> PatchLayout:
    config_path = path or Path(__file__).resolve().with_name("patch-layout.json")
    data = json.loads(config_path.read_text(encoding="utf-8"))
    repository = frozenset(normalized_path(item) for item in data["repositoryPatches"])
    graphics = frozenset(normalized_path(item) for item in data["graphicsPatches"])
    return PatchLayout(repository_patches=repository, graphics_patches=graphics)


PATCH_LAYOUT = load_patch_layout()