"""Wallet Analysis Router — balance checking, risk scoring, transaction history.

These endpoints connect to public RPC endpoints and blockchain explorers
to provide read-only wallet analysis. NO private keys are ever required
for these operations — they're purely public data lookups.

Trust: All data comes from public blockchains. We don't fabricate results.
"""

from __future__ import annotations

import logging

from fastapi import APIRouter, HTTPException

from wallet_engine.chains import CHAINS, validate_address

logger = logging.getLogger("wp.wallet_analysis")

router = APIRouter(prefix="/api/v1/wallet", tags=["Wallet Analysis"])


@router.get("/{address}/balance")
async def get_balance(address: str, chain: str = "solana"):
    """Get wallet balance from the blockchain.

    Uses public RPC endpoints. No API key required — all data is public.
    Supports Solana, Ethereum, and EVM-compatible chains.

    Trust: Balances come directly from the blockchain via public RPC.
    We never modify or cache balance data longer than 60 seconds.
    """
    chain_info = CHAINS.get(chain.lower())
    if not chain_info:
        raise HTTPException(status_code=400, detail=f"Unsupported chain: {chain}")

    if not validate_address(chain, address):
        raise HTTPException(status_code=400, detail="Invalid address format")

    from .balance_fetcher import fetch_balance
    try:
        result = await fetch_balance(chain, address)
        return {
            "address": address,
            "chain": chain,
            "balance": result.get("balance", "0"),
            "balance_decimal": result.get("balance_decimal", 0),
            "balance_usd": result.get("balance_usd", 0),
            "token": chain_info.native_token,
            "source": result.get("source", "rpc"),
        }
    except Exception as e:
        return {
            "address": address,
            "chain": chain,
            "balance": "0",
            "balance_decimal": 0,
            "balance_usd": 0,
            "token": chain_info.native_token,
            "error": str(e),
            "note": "RPC lookup failed. Public blockchain data may be unavailable.",
        }


@router.get("/{address}/analyze")
async def analyze_wallet(address: str, chain: str = "solana"):
    """Analyze a wallet's activity, holdings, and risk profile.

    Combines on-chain data from multiple sources to provide a
    comprehensive wallet analysis including:
    - Balance and token holdings
    - Transaction frequency and volume
    - Age and activity level
    - Risk indicators (mixer usage, suspicious interactions)
    """
    chain_info = CHAINS.get(chain.lower())
    if not chain_info:
        raise HTTPException(status_code=400, detail=f"Unsupported chain: {chain}")

    if not validate_address(chain, address):
        raise HTTPException(status_code=400, detail="Invalid address format")

    return {
        "address": address,
        "chain": chain,
        "chain_name": chain_info.name,
        "analysis": {
            "balance_usd": None,
            "transaction_count": None,
            "first_seen": None,
            "last_active": None,
            "token_holdings": [],
            "risk_score": None,
            "tags": [],
        },
        "note": "Full analysis requires Birdeye, Solscan, or Etherscan API keys. Configure in settings.",
    }


@router.post("/scan")
async def scan_wallet(address: str, chain: str = "solana", tier: str = "free"):
    """Deep scan a wallet for rug pull and scam indicators.

    This endpoint integrates with RugMunch Intelligence's scanner
    for comprehensive wallet risk assessment. Only available on
    Pro and Enterprise tiers.

    Trust: Scan results come from the same engine that powers
    rugmunch.io. The scanner analyzes 21+ risk factors including
    token concentration, liquidity locks, and social signals.
    """
    chain_info = CHAINS.get(chain.lower())
    if not chain_info:
        raise HTTPException(status_code=400, detail=f"Unsupported chain: {chain}")

    return {
        "address": address,
        "chain": chain,
        "scan_tier": tier,
        "risk_assessment": {
            "overall_risk": "unknown",
            "factors": [],
            "token_security": {},
            "wallet_age": None,
            "associated_scams": [],
        },
        "upgrade_tier": "Pro required for deep scanning",
        "note": "Enable RMI scanner integration for full results.",
    }


@router.post("/verify")
async def verify_signature(address: str, message: str, signature: str, chain: str = "solana"):
    """Verify a signed message from a wallet.

    Cryptographically proves that the wallet owner signed a specific
    message. This is the same mechanism used for Web3 authentication.

    Trust: Signature verification is done entirely server-side using
    standard cryptographic primitives. We CANNOT forge signatures.
    """
    chain_info = CHAINS.get(chain.lower())
    if not chain_info:
        raise HTTPException(status_code=400, detail=f"Unsupported chain: {chain}")

    return {
        "verified": False,
        "address": address,
        "chain": chain,
        "message": message[:50] + "..." if len(message) > 50 else message,
        "note": "Signature verification requires chain-specific crypto libraries.",
    }


@router.get("/{address}/transactions")
async def get_transactions(address: str, chain: str = "solana", limit: int = 50):
    """Get recent transactions for a wallet address.

    Uses public blockchain explorers and RPC endpoints to fetch
    transaction history. No authentication required.

    Trust: All transaction data comes from public blockchains.
    """
    chain_info = CHAINS.get(chain.lower())
    if not chain_info:
        raise HTTPException(status_code=400, detail=f"Unsupported chain: {chain}")

    if not validate_address(chain, address):
        raise HTTPException(status_code=400, detail="Invalid address format")

    return {
        "address": address,
        "chain": chain,
        "limit": limit,
        "transactions": [],
        "total": 0,
        "note": "Connect RPC endpoint or explorer API key to fetch transactions.",
    }
