"""Enforce inward dependencies in the domain package."""

import ast
from pathlib import Path

ROOT = Path(__file__).resolve().parents[1]
FORBIDDEN = ("fastapi", "mcp", "gewu.adapters", "gewu.bootstrap", "gewu.transports")


def main() -> None:
    domain = ROOT / "src" / "gewu" / "domain"
    violations: list[str] = []
    for path in domain.rglob("*.py"):
        tree = ast.parse(path.read_text(encoding="utf-8"), filename=str(path))
        for node in ast.walk(tree):
            if isinstance(node, ast.Import):
                names = [alias.name for alias in node.names]
            elif isinstance(node, ast.ImportFrom):
                names = [node.module or ""]
            else:
                continue
            for name in names:
                if any(name == prefix or name.startswith(prefix + ".") for prefix in FORBIDDEN):
                    violations.append(f"{path.relative_to(ROOT)}:{node.lineno}: {name}")
    if violations:
        raise SystemExit("Forbidden domain dependencies:\n" + "\n".join(violations))


if __name__ == "__main__":
    main()