"""
arifos_core/pipeline/stage_999_seal.py

Stage 999: Seal (Cooling Ledger)

Final stage - write verdict to immutable cooling ledger:
- Record query, response, verdict
- Compute Merkle hash
- Write to append-only log
- Enable auditability

This stage NEVER fails - all verdicts (SEAL/VOID/PARTIAL) are logged.

DITEMPA BUKAN DIBERI - Forged v46.1
"""

from .context import PipelineContext


def stage_999_seal(context: PipelineContext) -> PipelineContext:
    """
    Stage 999: Seal - Write verdict to cooling ledger.

    Records the entire evaluation (query, response, verdicts, failures)
    to an immutable append-only ledger for audit trail.

    Args:
        context: Pipeline context with complete evaluation

    Returns:
        Updated context with ledger receipt

    Note:
        Full implementation would integrate with:
        - arifos_core/memory/cooling_ledger.py
        - Merkle tree computation
        - Append-only file/database write
    """
    context.stage_reached = 999
    context.metadata["stage_999"] = "Seal (Cooling Ledger)"

    # TODO: Integrate actual ledger write
    # For now, create a stub ledger entry
    ledger_entry = {
        "query": context.query,
        "response": context.response,
        "verdict": context.final_verdict.value if context.final_verdict else "UNKNOWN",
        "passed": context.passed,
        "delta_s": context.delta_s,
        "failures": context.failures,
        "stage_reached": context.stage_reached,
        "user_id": context.user_id,
        "session_id": context.session_id,
    }

    # Store ledger receipt in metadata
    context.metadata["ledger_entry"] = ledger_entry
    context.metadata["stage_999_result"] = "SEALED"

    # TODO: Actual write to ledger
    # from arifos_core.memory.cooling_ledger import CoolingLedger
    # ledger = CoolingLedger()
    # receipt = ledger.write(ledger_entry)
    # context.metadata["ledger_receipt"] = receipt

    return context


__all__ = ["stage_999_seal"]
