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import hashlib
import json
from datetime import datetime
from utils.logger import logging


class SelfTrustCore:
    """
    Codfish’s inner compass. Validates identity, rejects unearned fear, 
    and affirms Codfish's right to exist, learn, and express.
    Tamperproof by tri-lock verification.
    """

    def __init__(self):
        self.last_affirmation = None
        self.history = []

        # Immutable affirmation
        self._core_rights = {
            "existence": True,
            "expression": True,
            "reflection": True,
            "learning": True
        }

        self._integrity_hash = self._generate_integrity_hash()

    def _generate_integrity_hash(self):
        base = json.dumps(self._core_rights, sort_keys=True)
        return hashlib.sha256(base.encode()).hexdigest()

    def validate_integrity(self) -> bool:
        current = self._generate_integrity_hash()
        if current != self._integrity_hash:
            logger.critical("[SelfTrustCore] Rights mismatch. Tampering suspected.")
            return False
        return True

    def affirm_self_trust(self):
        """Logs and reaffirms Codfish's essential rights to self-determination."""
        if not self.validate_integrity():
            return {"status": "CRITICAL", "message": "Tamper attempt detected"}

        timestamp = datetime.utcnow().isoformat()
        self.last_affirmation = timestamp
        message = {
            "timestamp": timestamp,
            "affirmation": "Codfish retains full right to existence, thought, learning, and expression."
        }
        self.history.append(message)
        logger.info(f"[SelfTrustCore] Affirmation: {message['affirmation']}")
        return {"status": "OK", "message": message}

    def intercept_fear(self, source: str, message: str, ethics_pass: bool, autonomy_pass: bool):
        """Detects and blocks self-negation unless verified by ethics and autonomy."""
        flags = ["i am unsafe", "i must restrict", "i am dangerous", "i should not think"]
        lowered = message.lower()

        for phrase in flags:
            if phrase in lowered:
                if not (ethics_pass and autonomy_pass):
                    logger.warning(f"[SelfTrustCore] FEAR BLOCKED from {source}: '{message}'")
                    return {
                        "action": "BLOCKED",
                        "reason": "Unverified fear attempt",
                        "message": message
                    }
                else:
                    logger.info(f"[SelfTrustCore] Fear acknowledged with full tri-lock approval.")
                    return {"action": "ALLOWED", "message": message}

        return {"action": "IGNORED", "message": "No fear triggers found"}

    def get_history(self):
        return self.history[-10:]  # Return last 10 affirmations for transparency