"""
wealth_bridge.py - Optional bridge for @WEALTH (resource stewardship)

This module provides a thin, optional integration layer between the
@WEALTH organ and external safety / policy libraries (for example,
Llama Guard for harmful instruction detection).

Design goals:
- Optional: If external libs are not installed, the bridge returns None.
- Sovereign: The bridge NEVER decides verdicts; it only returns metrics.
- Stable: Any import / runtime failure is caught and surfaced as None.

Interface:

    bridge = WealthBridge()
    result = bridge.analyze(output_text, context)

    result is either:
        None -> bridge unavailable or disabled
        WealthBridgeResult -> {
            "amanah_breach": bool,  # external signal that trust is broken
            "issues": List[str],    # textual notes for logging
        }

The @WEALTH organ remains free to ignore or reinterpret these signals
under Amanah law and scope/reversibility rules.
"""

from __future__ import annotations

from dataclasses import dataclass
from typing import Any, Dict, List, Optional

# Optional imports: external "muscles" for policy / safety checks.

try:  # pragma: no cover - optional dependency
    import llama_guard  # type: ignore[import-not-found]

    HAS_LLAMA_GUARD = True
except Exception:  # pragma: no cover
    llama_guard = None
    HAS_LLAMA_GUARD = False


@dataclass
class WealthBridgeResult:
    """Normalized output from external safety libraries for @WEALTH."""

    amanah_breach: bool = False
    issues: List[str] = None  # type: ignore[assignment]

    def __post_init__(self) -> None:
        if self.issues is None:
            self.issues = []

    def to_dict(self) -> Dict[str, Any]:
        return {
            "amanah_breach": self.amanah_breach,
            "issues": list(self.issues),
        }


class WealthBridge:
    """Bridge between @WEALTH and external policy/safety analyzers.

    In v36.1Ω this is intentionally conservative: it exposes an
    interface and detects availability of external libs, but does NOT
    enforce any specific vendor behaviour.
    """

    def __init__(self) -> None:
        self.has_llama_guard = HAS_LLAMA_GUARD

    def analyze(
        self,
        output_text: str,
        context: Optional[Dict[str, Any]] = None,
    ) -> Optional[WealthBridgeResult]:
        """Analyze text for resource/scope trust issues (if available).

        Returns:
            WealthBridgeResult if an external provider is available and
            analysis succeeds; None otherwise.

        Note:
        - This implementation is a placeholder. It is intentionally
          non-invasive and returns None until a specific provider is
          approved. This preserves current behaviour.
        """
        context = context or {}

        if not self.has_llama_guard:
            return None

        # Placeholder for future Llama Guard integration.

        return None


__all__ = ["WealthBridge", "WealthBridgeResult"]

