"""Layer 5 — Manufacturing Process Authority."""

from typing import Any

from pydantic import BaseModel, Field


class ProcessEligibilityResult(BaseModel):
    eligible: bool = Field(...)
    process_type: str = Field(...)
    reason: str | None = Field(default=None)


class ProcessAuthority:
    """Evaluates eligibility for additive, subtractive, hybrid."""

    def process_eligible(
        self,
        design_ref: str,
        process_type: str,
        context: dict[str, Any] | None = None,
    ) -> ProcessEligibilityResult:
        if not design_ref or not process_type:
            return ProcessEligibilityResult(
                eligible=False,
                process_type=process_type or "unknown",
                reason="design_ref and process_type required",
            )
        pt = process_type.lower()
        if pt not in ("additive", "subtractive", "hybrid"):
            return ProcessEligibilityResult(eligible=False, process_type=process_type, reason="Unknown process_type")
        return ProcessEligibilityResult(eligible=True, process_type=pt, reason=None)