"""
Tests for Privacy-Preserving Universal Dignity Bonds V2

Proves:
✓ Zero surveillance - No central database of scores
✓ Privacy over surveillance - Only ZK proofs shared
✓ No digital ID - Anonymous bonds
✓ Community attestation - Local trust, not central authority
✓ Self-sovereign data - Individual controls their data
✓ Economic mechanism identical to V1 - Delta-based, constraint multipliers
"""

import pytest
from datetime import datetime, timedelta
from vaultfire.advanced_bonds.universal_dignity_bonds_v2 import (
    PrivacyPreservingEngine,
    PrivacyPreservingBond,
    PrivacyPreservingFlourishingData,
    ZeroKnowledgeProof,
    CommunityAttestation,
    ConstraintType,
    create_beneficiary_commitment,
    create_community_circle,
    verify_attestation_threshold,
)


class TestPrivacyArchitecture:
    """Test privacy-preserving architecture"""

    def test_no_central_database(self):
        """Engine has NO profiles database, NO person_id tracking"""
        engine = PrivacyPreservingEngine()

        # No profiles attribute
        assert not hasattr(engine, 'profiles')

        # No person_to_bonds tracking
        assert not hasattr(engine, 'person_to_bonds')

        # Only anonymous bonds
        assert hasattr(engine, 'bonds')
        assert hasattr(engine, 'staker_bonds')

    def test_anonymous_bonds(self):
        """Bonds are anonymous - no person_id"""
        engine = PrivacyPreservingEngine()

        commitment = create_beneficiary_commitment("secret123")
        bond = engine.create_anonymous_bond("staker", 1000.0, commitment)

        # Bond has NO person_id
        assert not hasattr(bond, 'person_id')

        # Only cryptographic commitment
        assert bond.beneficiary_commitment == commitment
        assert len(bond.beneficiary_commitment) == 64  # SHA256 hash

    def test_zero_knowledge_proofs_only(self):
        """Bond updates use ZK proofs, not raw data"""
        engine = PrivacyPreservingEngine()

        commitment = create_beneficiary_commitment("secret456")
        bond = engine.create_anonymous_bond("staker", 1000.0, commitment)

        # Create community attestations
        attestations = [
            CommunityAttestation(signature=f"sig_{i}", attestation_type="delta_improvement")
            for i in range(3)
        ]

        # Create ZK proof (NO raw scores sent)
        proof = ZeroKnowledgeProof(
            baseline_commitment="abc123",
            new_commitment="def456",
            claimed_delta=20.0,
            claimed_multiplier=3.0,
            delta_proof="proof_delta",
            constraint_proof="proof_constraints",
            attestation_signatures=[att.signature for att in attestations]
        )

        # Update bond from proof
        result = engine.submit_zk_proof(bond.bond_id, proof)

        # Bond updated without seeing raw data
        assert result["proof_verified"] is True
        assert result["claimed_delta"] == 20.0
        assert result["claimed_multiplier"] == 3.0

        # No raw flourishing scores anywhere
        bond_dict = bond.to_dict()
        assert "flourishing_score" not in bond_dict
        assert "person_id" not in bond_dict

    def test_self_sovereign_data(self):
        """Individual keeps data locally, never sent to engine"""
        # Individual's local data (NEVER sent to engine)
        local_data = PrivacyPreservingFlourishingData(
            encrypted_scores="encrypted_blob_12345",
            baseline_hash="hash_abc",
            attestation_circle=create_community_circle(["alice", "bob", "charlie"])
        )

        # Data is encrypted
        assert local_data.encrypted_scores == "encrypted_blob_12345"

        # Attestation circle is anonymized
        assert len(local_data.attestation_circle) == 3
        for member in local_data.attestation_circle:
            assert len(member) == 8  # Anonymized hash

        # Engine never sees this data
        engine = PrivacyPreservingEngine()
        assert len(engine.bonds) == 0  # No access to individual's data

    def test_community_attestation_threshold(self):
        """Requires 3+ community attestations, no central authority"""
        # Create attestations from community members
        attestations = [
            CommunityAttestation(signature=f"sig_{i}", attestation_type="delta_improvement")
            for i in range(5)
        ]

        # Verify threshold met (no central authority)
        assert verify_attestation_threshold(attestations, threshold=3)
        assert verify_attestation_threshold(attestations, threshold=5)
        assert not verify_attestation_threshold(attestations[:2], threshold=3)


class TestZeroKnowledgeProofs:
    """Test zero-knowledge proof system"""

    def test_zk_proof_creation(self):
        """Create ZK proof without revealing scores"""
        local_data = PrivacyPreservingFlourishingData(
            encrypted_scores="encrypted",
            baseline_hash="hash",
            attestation_circle=create_community_circle(["a", "b", "c"])
        )

        attestations = [
            CommunityAttestation(signature=f"sig_{i}", attestation_type="delta")
            for i in range(3)
        ]

        # Generate proof
        proof = local_data.generate_zk_proof(
            baseline_score=30.0,
            new_score=60.0,
            constraints={ConstraintType.POVERTY: 1.0},
            attestations=attestations
        )

        # Proof contains commitments (not scores)
        assert len(proof.baseline_commitment) == 64
        assert len(proof.new_commitment) == 64

        # Proof contains claimed values
        assert proof.claimed_delta == 30.0
        assert proof.claimed_multiplier == 2.5  # Poverty multiplier

        # Proof has attestations
        assert len(proof.attestation_signatures) == 3

    def test_zk_proof_verification(self):
        """Verify ZK proof without seeing raw data"""
        attestations = [
            CommunityAttestation(signature=f"sig_{i}", attestation_type="delta")
            for i in range(3)
        ]

        proof = ZeroKnowledgeProof(
            baseline_commitment="a" * 64,
            new_commitment="b" * 64,
            claimed_delta=25.0,
            claimed_multiplier=3.0,
            delta_proof="proof",
            constraint_proof="proof",
            attestation_signatures=[att.signature for att in attestations]
        )

        # Proof verifies without revealing data
        assert proof.verify() is True

        # No raw data in proof
        proof_dict = proof.to_dict()
        assert "baseline_score" not in proof_dict
        assert "new_score" not in proof_dict
        assert "person_id" not in proof_dict

    def test_zk_proof_invalid_delta(self):
        """Reject proof with invalid delta"""
        proof = ZeroKnowledgeProof(
            baseline_commitment="a" * 64,
            new_commitment="b" * 64,
            claimed_delta=150.0,  # Invalid (> 100)
            claimed_multiplier=3.0,
            delta_proof="proof",
            constraint_proof="proof",
            attestation_signatures=["sig1", "sig2", "sig3"]
        )

        assert proof.verify() is False

    def test_zk_proof_insufficient_attestations(self):
        """Reject proof without enough community attestations"""
        proof = ZeroKnowledgeProof(
            baseline_commitment="a" * 64,
            new_commitment="b" * 64,
            claimed_delta=20.0,
            claimed_multiplier=2.0,
            delta_proof="proof",
            constraint_proof="proof",
            attestation_signatures=["sig1"]  # Only 1 (need 3)
        )

        assert proof.verify() is False


class TestEconomicMechanism:
    """Test economic mechanism identical to V1 but privacy-preserving"""

    def test_delta_based_appreciation(self):
        """Bond appreciates based on delta (from ZK proof)"""
        engine = PrivacyPreservingEngine()

        commitment = create_beneficiary_commitment("secret")
        bond = engine.create_anonymous_bond("staker", 1000.0, commitment)

        # Submit ZK proof claiming 20 delta, 3.0x multiplier
        attestations = [CommunityAttestation(signature=f"sig_{i}", attestation_type="delta") for i in range(3)]
        proof = ZeroKnowledgeProof(
            baseline_commitment="a" * 64,
            new_commitment="b" * 64,
            claimed_delta=20.0,
            claimed_multiplier=3.0,
            delta_proof="proof",
            constraint_proof="proof",
            attestation_signatures=[a.signature for a in attestations]
        )

        result = engine.submit_zk_proof(bond.bond_id, proof)

        # Appreciation = 1000 × 0.20 × 3.0 = 600
        assert result["appreciation"] == 600.0
        assert bond.current_value == 1600.0

    def test_constraint_multipliers_work(self):
        """Constraint multipliers identical to V1"""
        local_data = PrivacyPreservingFlourishingData(
            encrypted_scores="encrypted",
            baseline_hash="hash",
            attestation_circle=create_community_circle(["a", "b", "c"])
        )

        # Test refugee + trauma (should stack: 5.0 × 3.0 = 15.0)
        multiplier = local_data._calculate_constraint_multiplier({
            ConstraintType.REFUGEE_STATUS: 1.0,
            ConstraintType.TRAUMA: 1.0
        })

        assert multiplier == 15.0

        # Test poverty alone
        multiplier = local_data._calculate_constraint_multiplier({
            ConstraintType.POVERTY: 1.0
        })

        assert multiplier == 2.5

    def test_disadvantaged_earns_more(self):
        """Disadvantaged earns more (identical to V1 proof)"""
        engine = PrivacyPreservingEngine()

        # Privileged bond
        bond_priv = engine.create_anonymous_bond("staker", 1000.0, "priv_commitment")

        # Disadvantaged bond
        bond_dis = engine.create_anonymous_bond("staker", 1000.0, "dis_commitment")

        # Privileged: Small delta, no multiplier
        attestations = [CommunityAttestation(signature=f"sig_{i}", attestation_type="delta") for i in range(3)]
        proof_priv = ZeroKnowledgeProof(
            baseline_commitment="a" * 64,
            new_commitment="b" * 64,
            claimed_delta=6.75,  # 83.25 → 90
            claimed_multiplier=1.0,
            delta_proof="proof",
            constraint_proof="proof",
            attestation_signatures=[a.signature for a in attestations]
        )

        # Disadvantaged: Larger delta, 5x multiplier
        proof_dis = ZeroKnowledgeProof(
            baseline_commitment="c" * 64,
            new_commitment="d" * 64,
            claimed_delta=15.0,  # 17 → 32
            claimed_multiplier=5.0,
            delta_proof="proof",
            constraint_proof="proof",
            attestation_signatures=[a.signature for a in attestations]
        )

        result_priv = engine.submit_zk_proof(bond_priv.bond_id, proof_priv)
        result_dis = engine.submit_zk_proof(bond_dis.bond_id, proof_dis)

        # Disadvantaged earns more
        assert result_dis["appreciation"] > result_priv["appreciation"]

        # Calculate ratio
        appreciation_ratio = result_dis["appreciation"] / result_priv["appreciation"]
        assert appreciation_ratio > 8.0  # At least 8x better

    def test_dignity_floor(self):
        """Bond never goes to zero (inherent human worth)"""
        engine = PrivacyPreservingEngine()

        bond = engine.create_anonymous_bond("staker", 1000.0, "commitment")

        # Even with no improvements, bond has dignity floor
        assert bond.dignity_floor() == 500.0  # 50% of stake


class TestCommunityAttestation:
    """Test community attestation system"""

    def test_community_circle_creation(self):
        """Create community circle (3-7 members)"""
        circle = create_community_circle(["alice", "bob", "charlie"])

        assert len(circle) == 3
        # Members are anonymized
        for member in circle:
            assert len(member) == 8

    def test_community_circle_minimum(self):
        """Require at least 3 members"""
        with pytest.raises(ValueError, match="at least 3 members"):
            create_community_circle(["alice", "bob"])

    def test_community_circle_maximum(self):
        """Recommend <= 7 members for privacy"""
        with pytest.raises(ValueError, match="<= 7 members"):
            create_community_circle([f"person_{i}" for i in range(8)])

    def test_attestation_signature_verification(self):
        """Verify attestation signatures"""
        attestation = CommunityAttestation(
            signature="valid_signature",
            attestation_type="delta_improvement"
        )

        assert attestation.verify_signature() is True

    def test_attestation_reputation(self):
        """Attesters have reputation scores"""
        attestation = CommunityAttestation(
            signature="sig",
            attestation_type="delta",
            attester_reputation=0.9
        )

        assert attestation.attester_reputation == 0.9


class TestPrivacyPreservingBond:
    """Test privacy-preserving bond mechanics"""

    def test_bond_has_no_identity(self):
        """Bond has no person_id or identity tracking"""
        engine = PrivacyPreservingEngine()

        bond = engine.create_anonymous_bond("staker", 1000.0, "commitment")

        # No identity fields
        assert not hasattr(bond, 'person_id')
        assert not hasattr(bond, 'person_name')

        # Only cryptographic commitment
        assert bond.beneficiary_commitment == "commitment"

    def test_bond_stores_proofs_not_data(self):
        """Bond stores ZK proofs, not raw flourishing data"""
        engine = PrivacyPreservingEngine()

        bond = engine.create_anonymous_bond("staker", 1000.0, "commitment")

        attestations = [CommunityAttestation(signature=f"sig_{i}", attestation_type="delta") for i in range(3)]
        proof = ZeroKnowledgeProof(
            baseline_commitment="a" * 64,
            new_commitment="b" * 64,
            claimed_delta=10.0,
            claimed_multiplier=2.0,
            delta_proof="proof",
            constraint_proof="proof",
            attestation_signatures=[a.signature for a in attestations]
        )

        engine.submit_zk_proof(bond.bond_id, proof)

        # Bond has proof history
        assert len(bond.zk_proof_history) == 1
        assert bond.zk_proof_history[0] == proof

        # Bond has NO raw data
        bond_dict = bond.to_dict()
        assert "flourishing_scores" not in bond_dict
        assert "person_data" not in bond_dict

    def test_bond_vesting(self):
        """Bonds vest over time (identical to V1)"""
        engine = PrivacyPreservingEngine()

        bond = engine.create_anonymous_bond("staker", 1000.0, "commitment")

        # Initially not vested
        status = bond.vesting_status()
        assert status["vesting_progress"] < 0.01

        # Simulate time passage
        bond.created_at = datetime.now() - timedelta(days=365)
        status = bond.vesting_status()
        assert status["vesting_progress"] >= 1.0
        assert status["fully_vested"] is True


class TestPrivacyCompliance:
    """Test compliance with privacy principles"""

    def test_no_surveillance_database(self):
        """NO central database of human flourishing scores"""
        engine = PrivacyPreservingEngine()

        # Create multiple bonds
        for i in range(10):
            engine.create_anonymous_bond(f"staker_{i}", 1000.0, f"commitment_{i}")

        # Engine has bonds, but NO flourishing data
        assert len(engine.bonds) == 10

        # NO profiles database
        assert not hasattr(engine, 'profiles')

        # NO person tracking
        for bond in engine.bonds.values():
            assert not hasattr(bond, 'person_id')
            assert not hasattr(bond, 'flourishing_data')

    def test_no_digital_id_required(self):
        """No digital ID required - anonymous bonds"""
        engine = PrivacyPreservingEngine()

        # Create bond with only cryptographic commitment (no ID)
        commitment = create_beneficiary_commitment("random_secret_12345")
        bond = engine.create_anonymous_bond("staker", 1000.0, commitment)

        # No digital ID anywhere
        bond_dict = bond.to_dict()
        assert "digital_id" not in bond_dict
        assert "person_id" not in bond_dict
        assert "identity" not in bond_dict

    def test_self_sovereign_data_control(self):
        """Individual controls their own data (never sent to engine)"""
        # Individual's local encrypted data
        local_data = PrivacyPreservingFlourishingData(
            encrypted_scores="AES_ENCRYPTED_BLOB_XYZ",
            baseline_hash="SHA256_HASH",
            attestation_circle=create_community_circle(["a", "b", "c"])
        )

        # Individual generates proof locally
        attestations = [CommunityAttestation(signature=f"sig_{i}", attestation_type="delta") for i in range(3)]
        proof = local_data.generate_zk_proof(
            baseline_score=40.0,
            new_score=70.0,
            constraints={ConstraintType.DISABILITY: 1.0},
            attestations=attestations
        )

        # Only proof is sent to engine (NOT raw data)
        engine = PrivacyPreservingEngine()
        commitment = create_beneficiary_commitment("secret")
        bond = engine.create_anonymous_bond("staker", 1000.0, commitment)

        result = engine.submit_zk_proof(bond.bond_id, proof)

        # Engine NEVER sees raw scores
        assert "baseline_score" not in result
        assert "new_score" not in result

        # Individual keeps encrypted data locally
        assert local_data.encrypted_scores == "AES_ENCRYPTED_BLOB_XYZ"

    def test_community_not_central_authority(self):
        """Community attestation, NOT central authority verification"""
        # Create local community circle (no central authority)
        community = create_community_circle(["alice", "bob", "charlie", "dave"])

        # Community attests locally
        attestations = [
            CommunityAttestation(
                signature=f"community_sig_{i}",
                attestation_type="delta_improvement",
                attester_reputation=0.95
            )
            for i in range(len(community))
        ]

        # Verification happens via threshold (no central authority)
        assert verify_attestation_threshold(attestations, threshold=3)

        # No central authority involved
        # No KYC
        # No identity verification
        # Pure community trust


class TestMissionAlignment:
    """Test alignment with core mission"""

    def test_humanity_over_control(self):
        """System values human flourishing, doesn't control behavior"""
        engine = PrivacyPreservingEngine()

        # No behavior tracking
        assert not hasattr(engine, 'behavior_scores')
        assert not hasattr(engine, 'compliance_tracking')

        # Only flourishing delta (via ZK proof)
        bond = engine.create_anonymous_bond("staker", 1000.0, "commitment")

        attestations = [CommunityAttestation(signature=f"sig_{i}", attestation_type="delta") for i in range(3)]
        proof = ZeroKnowledgeProof(
            baseline_commitment="a" * 64,
            new_commitment="b" * 64,
            claimed_delta=25.0,
            claimed_multiplier=1.0,
            delta_proof="proof",
            constraint_proof="proof",
            attestation_signatures=[a.signature for a in attestations]
        )

        result = engine.submit_zk_proof(bond.bond_id, proof)

        # Bond appreciates based on flourishing (humanity)
        # NOT based on compliance (control)
        assert result["appreciation"] > 0

    def test_privacy_over_surveillance(self):
        """Zero surveillance - all data encrypted/committed"""
        local_data = PrivacyPreservingFlourishingData(
            encrypted_scores="ENCRYPTED",
            baseline_hash="HASH"
        )

        # Data is encrypted
        assert "ENCRYPTED" in local_data.encrypted_scores

        # Commitments hide values
        commitment = local_data._create_commitment(75.5)
        assert len(commitment) == 64  # SHA256
        assert "75.5" not in commitment  # Value hidden

    def test_no_carbon_score(self):
        """No environmental compliance tracking"""
        local_data = PrivacyPreservingFlourishingData(
            encrypted_scores="encrypted",
            baseline_hash="hash"
        )

        # Generate proof with constraints
        attestations = [CommunityAttestation(signature=f"sig_{i}", attestation_type="delta") for i in range(3)]
        proof = local_data.generate_zk_proof(
            baseline_score=30.0,
            new_score=60.0,
            constraints={ConstraintType.POVERTY: 1.0},
            attestations=attestations
        )

        # No carbon score in constraints
        proof_dict = proof.to_dict()
        assert "carbon" not in str(proof_dict).lower()
        assert "environmental_compliance" not in str(proof_dict).lower()

    def test_morals_over_metrics(self):
        """Metrics serve morals (dignity floor, purpose optional)"""
        bond = PrivacyPreservingBond(
            bond_id="bond1",
            staker_id="staker",
            initial_stake=1000.0,
            beneficiary_commitment="commitment"
        )

        # Moral choice: Dignity floor (bonds never go to zero)
        assert bond.dignity_floor() == 500.0

        # This is MORAL decision, not metric optimization
        # Every human has inherent worth = 50% minimum
