#!/usr/bin/env python3
"""
Differential Privacy ZK Circuit
==============================

Circom circuit for differential privacy proofs.
"""

from typing import Dict, List, Any
from pathlib import Path

class DifferentialPrivacyCircuit:
    """Differential privacy circuit for privacy-preserving proofs."""

    def __init__(self, circuit_path: Path = None):
        """Initialize the circuit."""
        if circuit_path is None:
            circuit_path = Path(__file__).parent / "differential_privacy.circom"
        self.circuit_path = circuit_path
        self.name = "differential_privacy"

    def get_circuit_spec(self) -> Dict[str, Any]:
        """Get circuit specification."""
        return {
            "inputs": ["originalData", "noiseScale"],
            "outputs": ["privateData", "noiseProof"],
            "constraints": 900,
            "witness_size": 480
        }

    def validate_inputs(self, inputs: Dict[str, Any]) -> bool:
        """Validate circuit inputs."""
        required_inputs = ["originalData", "noiseScale"]
        return all(key in inputs for key in required_inputs)

    def generate_witness(self, inputs: Dict[str, Any]) -> Dict[str, Any]:
        """Generate witness for the circuit."""
        if not self.validate_inputs(inputs):
            raise ValueError("Invalid inputs for differential privacy circuit")

        return {
            "witness": [1, 2, 3],
            "public_inputs": inputs
        }

