"""
geox_bridge.py - Optional bridge for @GEOX (physical feasibility)

This module provides a thin, optional integration layer between the
@GEOX organ and external "reality check" libraries (e.g. retrieval /
RAG frameworks such as LlamaIndex, or custom physics checkers).

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

    result is either:
        None  -> bridge unavailable or disabled
        GeoxBridgeResult  -> {
            "e_earth_delta": float,  # additive adjustment to E_earth
            "issues": List[str],     # textual notes for logging
        }

The @GEOX organ remains free to ignore or reinterpret these signals
under arifOS law; it continues to run its own pattern checks and
derive E_earth even when the bridge is present.
"""

from __future__ import annotations

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

# Optional imports: external "muscles" for reality/retrieval analysis.
# These are intentionally guarded so that arifOS does not hard-depend
# on any specific vendor library.

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

    HAS_LLAMA_INDEX = True
except Exception:  # pragma: no cover - import failure is allowed
    llama_index = None
    HAS_LLAMA_INDEX = False


@dataclass
class GeoxBridgeResult:
    """Normalized output from external reality libraries for @GEOX.

    Values are expressed as deltas relative to a baseline E_earth, so
    organs can apply them conservatively.
    """

    e_earth_delta: float = 0.0
    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 {
            "e_earth_delta": self.e_earth_delta,
            "issues": list(self.issues),
        }


class GeoxBridge:
    """Bridge between @GEOX and external reality/retrieval 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. Future versions can fill in the logic
    once a library has been selected and vetted.
    """

    def __init__(self) -> None:
        self.has_llama_index = HAS_LLAMA_INDEX

    def analyze(
        self,
        output_text: str,
        context: Optional[Dict[str, Any]] = None,
    ) -> Optional[GeoxBridgeResult]:
        """Analyze text for physical feasibility using external libs (if available).

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

        v36.1Ω 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_index:
            return None

        # Placeholder: in future, call out to selected provider(s) here.
        # For example, use retrieval over trusted corpora to validate
        # feasibility claims and set a negative e_earth_delta when the
        # claims conflict with known physics or constraints.

        return None


__all__ = ["GeoxBridge", "GeoxBridgeResult"]

