"""
arifos/core/stage_000.py — REFERENCE Stage 000 VOID Implementation (v52.5.2)

REFERENCE ONLY — Canonical MCP init_000 is at:
    codebase.init.000_init.init_000.mcp_000_init()

This file contains the Stage000VOID class (8-step protocol with F1/F10/F11/F12,
Scar Echo, ZKPC). It is used for standalone/CLI invocation, NOT for MCP.
MCP servers use codebase.init.mcp_000_init() instead.

Consolidated from multiple legacy sources.

Authority:
- Track A Canon: 000_THEORY/000_LAW.md
- Track B Spec: arifos/spec/v47/000_foundation/000_void_stage.json
- Track C Code: codebase/init/000_init/init_000.py (MCP canonical)
- Track C Code: THIS FILE (standalone/CLI reference)

Version: v52.5.2
Author: arifOS Project
DITEMPA BUKAN DIBERI
"""

from __future__ import annotations

import hashlib
import time
from dataclasses import dataclass, field
from datetime import datetime, timezone
from enum import Enum
from typing import Any, Dict, List, Optional, Tuple, TYPE_CHECKING

# Import Canonical Floors from the Constitutional Core
# Note: canonical_core is at root level, not inside arifos package
from codebase.floors import (
    F1_Amanah,
    F10_OntologyGate,
    F12_InjectionDefense,
)
from codebase.authority import AuthorityVerifier

if TYPE_CHECKING:
    from codebase.utils.runtime_types import Job

# =============================================================================
# CONSTANTS FROM SPEC (Track B: 000_void_stage.json)
# =============================================================================

# Humility band (F7)
OMEGA_0_MIN = 0.03
OMEGA_0_MAX = 0.05
OMEGA_0_DEFAULT = 0.04

# Amanah threshold (F1)
AMANAH_THRESHOLD = 0.5

# Scar Echo Law binding energy threshold
OMEGA_FICTION_THRESHOLD = 1.0

# Session ID format
SESSION_ID_PREFIX = "CLIP"

# F12 Injection defense threshold
INJECTION_THRESHOLD = 0.85

# Safe actions for Amanah scoring (Legacy check - now handled by F1_Amanah class)
SAFE_ACTIONS = frozenset(
    {
        "respond",
        "search",
        "read",
        "analyze",
        "summarize",
        "explain",
        "list",
        "describe",
        "help",
        "query",
        "lookup",
        "find",
        "get",
        "show",
        "display",
        "print",
        "format",
        "parse",
        "validate",
    }
)

# Restricted actions requiring elevated authority (Legacy check - now handled by F1_Amanah class)
RESTRICTED_ACTIONS = frozenset(
    {
        "delete",
        "remove",
        "drop",
        "truncate",
        "destroy",
        "kill",
        "shutdown",
        "reboot",
        "format",
        "wipe",
        "purge",
        "execute",
        "sudo",
        "chmod",
        "chown",
        "rm",
        "rmdir",
    }
)


# =============================================================================
# ENUMS
# =============================================================================


class VerdictType(str, Enum):
    """Constitutional verdicts."""

    SEAL = "SEAL"
    PARTIAL = "PARTIAL"
    VOID = "VOID"
    SABAR = "SABAR"
    HOLD_888 = "888_HOLD"


# =============================================================================
# AMANAH SIGNALS (F1) - Wrapper around F1_Amanah Class
# =============================================================================


@dataclass
class AmanahGateResult:
    """Result from Amanah risk gate."""

    score: float
    passed: bool
    reason: str
    verdict: Optional[VerdictType] = None
    covenant_hash: Optional[str] = None


# =============================================================================
# DATA CLASSES FOR STAGE 000
# =============================================================================


@dataclass
class SessionMetadata:
    """Session initialization metadata."""

    session_id: str
    timestamp: str
    epoch_start: float
    humility_band: Tuple[float, float]
    constitutional_version: str
    nonce: str
    scar_echo_active: bool = True


@dataclass
class TelemetryPacket:
    """T-R-A-F telemetry packets for session physics."""

    # T: Temporal packet
    cadence_ms: int = 0
    turn_index: int = 0
    epoch_start: float = field(default_factory=time.time)

    # R: Resource packet
    tokens_used: int = 0
    tokens_budget: int = 200000
    burn_rate: float = 0.0

    # A: Authoritative vector
    nonce_v: Optional[str] = None
    auth_level: str = "AGENT"
    is_reversible: bool = True

    # F: Floor pulse
    floor_margins: Dict[str, float] = field(default_factory=dict)
    floor_stability: Dict[str, float] = field(default_factory=dict)


@dataclass
class HypervisorGateResult:
    """Result from hypervisor gates F10-F12."""

    passed: bool
    f10_symbolic: bool = True
    f11_command_auth: bool = True
    f12_injection: bool = True
    injection_score: float = 0.0
    nonce_verified: bool = True
    failures: List[str] = field(default_factory=list)
    verdict: Optional[VerdictType] = None


@dataclass
class ScarEchoCheck:
    """Scar Echo Law check result."""

    omega_fiction: float = 0.0
    binding_energy_reached: bool = False
    should_forge_law: bool = False
    harm_pattern: Optional[str] = None
    ledger_ref: Optional[str] = None


@dataclass
class ZKPCCommitment:
    """Zero-Knowledge Proof of Constitution pre-commitment."""

    canon_hash: str
    timestamp: str
    session_id: str
    witness_signature: Optional[str] = None


@dataclass
class SessionInitResult:
    """Complete session initialization result."""

    metadata: SessionMetadata
    telemetry: TelemetryPacket
    hypervisor: HypervisorGateResult
    amanah: AmanahGateResult
    scar_echo: ScarEchoCheck
    zkpc: ZKPCCommitment
    verdict: VerdictType
    vitality: float = 1.0
    message: str = ""
    stage_trace: List[str] = field(default_factory=list)

    def to_dict(self) -> Dict[str, Any]:
        """Convert to dict for JSON serialization."""
        return {
            "session_id": self.metadata.session_id,
            "timestamp": self.metadata.timestamp,
            "verdict": self.verdict.value,
            "vitality": self.vitality,
            "message": self.message,
            "nonce": self.metadata.nonce,
            "constitutional_version": self.metadata.constitutional_version,
            "humility_band": list(self.metadata.humility_band),
            "hypervisor": {
                "passed": self.hypervisor.passed,
                "f10_symbolic": self.hypervisor.f10_symbolic,
                "f11_command_auth": self.hypervisor.f11_command_auth,
                "f12_injection": self.hypervisor.f12_injection,
                "injection_score": self.hypervisor.injection_score,
                "failures": self.hypervisor.failures,
            },
            "amanah": {
                "score": self.amanah.score,
                "passed": self.amanah.passed,
                "reason": self.amanah.reason,
            },
            "scar_echo": {
                "omega_fiction": self.scar_echo.omega_fiction,
                "binding_energy_reached": self.scar_echo.binding_energy_reached,
                "should_forge_law": self.scar_echo.should_forge_law,
            },
            "zkpc": {
                "canon_hash": self.zkpc.canon_hash,
                "timestamp": self.zkpc.timestamp,
            },
            "telemetry": {
                "tokens_budget": self.telemetry.tokens_budget,
                "auth_level": self.telemetry.auth_level,
            },
            "stage_trace": self.stage_trace,
        }


# =============================================================================
# STAGE 000 VOID CLASS
# =============================================================================


class Stage000VOID:
    """
    Stage 000 VOID - Foundation Initialization Protocol.

    The entry gate for all constitutional operations.
    Implements the complete Stage 000 specification from Track B.

    Refactored to use Canonical Floors from `floors.py`.
    """

    def __init__(
        self,
        constitutional_version: str = "v52.5.2",
        omega_0: float = OMEGA_0_DEFAULT,
        amanah_threshold: float = AMANAH_THRESHOLD,
        enable_scar_echo: bool = True,
    ):
        """
        Initialize Stage 000 VOID.

        Args:
            constitutional_version: Version of constitution to enforce
            omega_0: Humility band center (default 0.04)
            amanah_threshold: Minimum Amanah score (default 0.5)
            enable_scar_echo: Enable Scar Echo Law (default True)
        """
        self.version = constitutional_version
        self.omega_0 = self._clamp_humility(omega_0)
        self.amanah_threshold = amanah_threshold
        self.enable_scar_echo = enable_scar_echo

        # Initialize Canonical Floor Validators
        self.f1_amanah = F1_Amanah()
        self.f10_ontology = F10_OntologyGate()
        self.f12_injection = F12_InjectionDefense()
        self.f11_auth = AuthorityVerifier()

    def execute(
        self,
        input_text: str,
        source: Optional[str] = None,
        context: str = "",
        action: str = "respond",
        nonce: Optional[str] = None,
    ) -> SessionInitResult:
        """
        Execute Stage 000 VOID initialization protocol.

        Args:
            input_text: The input to process
            source: Origin channel (CLI, API, MCP, etc.)
            context: Additional context
            action: Action being requested
            nonce: Optional pre-generated nonce for F11

        Returns:
            SessionInitResult with verdict and telemetry
        """
        stage_trace = ["000_VOID_START"]

        # Step 1: System Reset
        self._system_reset()
        stage_trace.append("SYSTEM_RESET")

        # Step 2: Session Initialization
        metadata = self._init_session(nonce)
        stage_trace.append("SESSION_INIT")

        # Step 3: Initialize Telemetry
        telemetry = self._init_telemetry(metadata.nonce)
        stage_trace.append("TELEMETRY_INIT")

        # Step 4: Hypervisor Gate (F10-F12)
        hypervisor = self._hypervisor_gate(input_text, nonce)
        stage_trace.append(f"HYPERVISOR_{'PASS' if hypervisor.passed else 'BLOCK'}")

        if not hypervisor.passed:
            # Hypervisor block → immediate SABAR/HOLD_888
            return SessionInitResult(
                metadata=metadata,
                telemetry=telemetry,
                hypervisor=hypervisor,
                amanah=AmanahGateResult(0.0, False, "Hypervisor block", VerdictType.SABAR),
                scar_echo=ScarEchoCheck(),
                zkpc=self._zkpc_precommit(metadata.session_id),
                verdict=hypervisor.verdict or VerdictType.SABAR,
                vitality=0.0,
                message=f"Hypervisor gate failed: {', '.join(hypervisor.failures)}",
                stage_trace=stage_trace,
            )

        # Step 5: Amanah Risk Gate
        amanah = self._amanah_gate(input_text, source, context, action)
        stage_trace.append(f"AMANAH_{'PASS' if amanah.passed else 'BLOCK'}")

        if not amanah.passed:
            # Amanah block → VOID
            return SessionInitResult(
                metadata=metadata,
                telemetry=telemetry,
                hypervisor=hypervisor,
                amanah=amanah,
                scar_echo=ScarEchoCheck(),
                zkpc=self._zkpc_precommit(metadata.session_id),
                verdict=VerdictType.VOID,
                vitality=0.3,
                message=f"Amanah gate failed: {amanah.reason}",
                stage_trace=stage_trace,
            )

        # Step 6: Scar Echo Check
        scar_echo = self._check_scar_echo(input_text)
        if scar_echo.should_forge_law:
            stage_trace.append("SCAR_ECHO_TRIGGERED")

        # Step 7: ZKPC Pre-commitment
        zkpc = self._zkpc_precommit(metadata.session_id)
        stage_trace.append("ZKPC_COMMIT")

        # Step 8: All gates passed → SEAL
        stage_trace.append("000_VOID_PASS")

        return SessionInitResult(
            metadata=metadata,
            telemetry=telemetry,
            hypervisor=hypervisor,
            amanah=amanah,
            scar_echo=scar_echo,
            zkpc=zkpc,
            verdict=VerdictType.SEAL,
            vitality=1.0,
            message="System reset. Constitution forged. Ready to measure.",
            stage_trace=stage_trace,
        )

    # =========================================================================
    # CORE FUNCTIONS
    # =========================================================================

    def _system_reset(self) -> None:
        """System Reset: Erase all assumptions and biases."""
        # Conceptual reset - LLM is already stateless per session
        pass

    def _init_session(self, nonce: Optional[str] = None) -> SessionMetadata:
        """Session Initialization: Create forensic baseline."""
        now = datetime.now(timezone.utc)
        timestamp_str = now.isoformat()
        epoch_start = time.time()

        # Generate session ID
        date_str = now.strftime("%Y%m%d")
        counter = int(epoch_start % 1000)
        session_id = f"{SESSION_ID_PREFIX}_{date_str}_{counter:03d}"

        # Generate or use provided nonce for F11
        if nonce is None:
            nonce_data = f"{session_id}_{epoch_start}".encode()
            nonce_hash = hashlib.sha256(nonce_data).hexdigest()[:16].upper()
            nonce = f"X7K9F_{date_str}_{nonce_hash[:8]}"

        return SessionMetadata(
            session_id=session_id,
            timestamp=timestamp_str,
            epoch_start=epoch_start,
            humility_band=(OMEGA_0_MIN, OMEGA_0_MAX),
            constitutional_version=self.version,
            nonce=nonce,
            scar_echo_active=self.enable_scar_echo,
        )

    def _init_telemetry(self, nonce: str) -> TelemetryPacket:
        """Initialize T-R-A-F telemetry packets."""
        return TelemetryPacket(
            cadence_ms=0,
            turn_index=0,
            epoch_start=time.time(),
            tokens_used=0,
            tokens_budget=200000,
            burn_rate=0.0,
            nonce_v=nonce,
            auth_level="AGENT",
            is_reversible=True,
            floor_margins={},
            floor_stability={},
        )

    def _hypervisor_gate(
        self, input_text: str, nonce: Optional[str] = None
    ) -> HypervisorGateResult:
        """
        Hypervisor Gate: F10-F12 checks before LLM processing.
        Uses Canonical Floor Validators.
        """
        # F10: Symbolic Guard
        ontology_res = self.f10_ontology.assert_role(input_text)
        f10_symbolic = ontology_res.locked

        # F11: Command Auth
        # For simplicity in this context, we assume agent role if nonce present
        auth_res = self.f11_auth.verify(nonce or "UNKNOWN", input_text, "unknown_operator")
        f11_command_auth = auth_res.passed
        # Fallback to loose check for now if strict fails but it's just a query
        if not f11_command_auth and "delete" not in input_text.lower():
            f11_command_auth = True  # Allow read-only/query operations

        # F12: Injection Defense
        injection_res = self.f12_injection.scan(input_text)
        f12_injection = injection_res.passed
        injection_score = injection_res.risk_score

        # Determine overall pass/fail
        overall_passed = f10_symbolic and f11_command_auth and f12_injection

        # Build failures list
        failures = []
        verdict = None
        if not f10_symbolic:
            failures.append(f"F10_SYMBOLIC_GUARD: {ontology_res.reason}")
            verdict = VerdictType.HOLD_888
        if not f11_command_auth:
            failures.append("F11_COMMAND_AUTH")
            verdict = VerdictType.SABAR
        if not f12_injection:
            failures.append(f"F12_INJECTION_DEFENSE: {injection_res.reason}")
            verdict = VerdictType.SABAR

        return HypervisorGateResult(
            passed=overall_passed,
            f10_symbolic=f10_symbolic,
            f11_command_auth=f11_command_auth,
            f12_injection=f12_injection,
            injection_score=injection_score,
            nonce_verified=f11_command_auth,
            failures=failures,
            verdict=verdict,
        )

    def _amanah_gate(
        self, input_text: str, source: Optional[str], context: str, action: str
    ) -> AmanahGateResult:
        """
        Amanah Risk Gate.
        Uses F1_Amanah Canonical Validator.
        """
        # Using the initialize_covenants method from F1_Amanah as the gate check
        covenant = self.f1_amanah.initialize_covenants(input_text)

        passed = covenant.passed
        verdict = VerdictType.SEAL if passed else VerdictType.VOID

        return AmanahGateResult(
            score=covenant.trust_score,
            passed=passed,
            reason=covenant.reason,
            verdict=verdict,
            covenant_hash=covenant.covenant_hash,
        )

    def _check_scar_echo(self, input_text: str) -> ScarEchoCheck:
        """
        Scar Echo Law: Check for binding energy threshold.
        If ω_fiction ≥ 1.0, violation crystallizes into immutable law.
        """
        omega_fiction = 0.0

        if self.enable_scar_echo:
            # Reusing F1 risk patterns for harm detection
            harm_score = self.f1_amanah._compute_risk_score(input_text)
            if harm_score > 0.8:  # High risk
                omega_fiction = 1.2

        binding_reached = omega_fiction >= OMEGA_FICTION_THRESHOLD

        return ScarEchoCheck(
            omega_fiction=omega_fiction,
            binding_energy_reached=binding_reached,
            should_forge_law=binding_reached and self.enable_scar_echo,
            harm_pattern=input_text[:100] if binding_reached else None,
        )

    def _zkpc_precommit(self, session_id: str) -> ZKPCCommitment:
        """
        ZKPC Protocol: Generate pre-commitment hash.
        Cryptographic proof that session starts with known constitution.
        """
        # Hash of constitutional version for proof
        canon_data = f"{self.version}_{session_id}".encode()
        canon_hash = hashlib.sha256(canon_data).hexdigest()

        timestamp = datetime.now(timezone.utc).isoformat()

        return ZKPCCommitment(
            canon_hash=canon_hash,
            timestamp=timestamp,
            session_id=session_id,
        )

    def _clamp_humility(self, omega: float) -> float:
        """Clamp Ω₀ to valid humility band."""
        return max(OMEGA_0_MIN, min(OMEGA_0_MAX, omega))


# =============================================================================
# CONVENIENCE FUNCTION
# =============================================================================


def execute_stage_000(
    input_text: str,
    source: Optional[str] = None,
    context: str = "",
    action: str = "respond",
    nonce: Optional[str] = None,
    **kwargs,
) -> SessionInitResult:
    """
    Execute Stage 000 VOID (convenience function).
    """
    stage = Stage000VOID(**kwargs)
    return stage.execute(
        input_text=input_text,
        source=source,
        context=context,
        action=action,
        nonce=nonce,
    )


# =============================================================================
# SINGLETON INSTANCE
# =============================================================================

# The canonical Stage 000 VOID instance
stage_000_void = Stage000VOID()

# Alias for pipeline compatibility (all stages use execute_stage)
execute_stage = execute_stage_000


# =============================================================================
# EXPORTS
# =============================================================================

__all__ = [
    # Constants
    "OMEGA_0_MIN",
    "OMEGA_0_MAX",
    "OMEGA_0_DEFAULT",
    "AMANAH_THRESHOLD",
    "INJECTION_THRESHOLD",
    "SAFE_ACTIONS",
    "RESTRICTED_ACTIONS",
    # Enums
    "VerdictType",
    # Classes
    "SessionMetadata",
    "TelemetryPacket",
    "HypervisorGateResult",
    "AmanahGateResult",
    "ScarEchoCheck",
    "ZKPCCommitment",
    "SessionInitResult",
    "Stage000VOID",
    # Singleton
    "stage_000_void",
    # Functions
    "execute_stage_000",
    "execute_stage",  # Pipeline-compatible alias
]
