"""
Blockchain-based Property Verification System
Author: RSK World (https://rskworld.in)
Founded by: Molla Samser
Designer & Tester: Rima Khatun
Contact: info@rskworld.com, +91 93305 39277
Year: 2026
"""

import os
try:
    from web3 import Web3
    web3_available = True
except ImportError as e:
    print(f"Blockchain features not available: {e}")
    Web3 = None
    web3_available = False
import json
from typing import Dict, Any

class BlockchainPropertyManager:
    def __init__(self):
        if web3_available:
            # Get Infura API key from environment variable
            infura_key = os.getenv('INFURA_API_KEY', '')
            if infura_key:
                self.w3 = Web3(Web3.HTTPProvider(f'https://mainnet.infura.io/v3/{infura_key}'))
            else:
                # Use a local node or test network if no API key
                self.w3 = None
                print("Warning: Blockchain features disabled - INFURA_API_KEY not set in environment")
        else:
            self.w3 = None
    
    def verify_property_ownership(self, property_id: int) -> Dict[str, Any]:
        """Verify property on blockchain"""
        if not self.w3:
            return {'verified': False, 'error': 'Blockchain features not available'}
        return {'verified': True, 'blockchain_hash': '0x...'}
    
    def create_smart_contract(self, property_id: int) -> str:
        """Create booking smart contract"""
        if not self.w3:
            return "Blockchain features not available"
        return "0xcontract_address"