collectors/explorers.py

"""
Blockchain Explorer Data Collectors
Fetches data from Etherscan, BscScan, and TronScan
"""

import asyncio
from datetime import datetime, timezone
from typing import Dict, List, Optional, Any
from utils.api_client import get_client
from utils.logger import setup_logger, log_api_request, log_error
from config import config

logger = setup_logger("explorers_collector")


def calculate_staleness_minutes(data_timestamp: Optional[datetime]) -> Optional[float]:
    """
    Calculate staleness in minutes from data timestamp to now

    Args:
        data_timestamp: Timestamp of the data

    Returns:
        Staleness in minutes or None if timestamp not available
    """
    if not data_timestamp:
        return None

    now = datetime.now(timezone.utc)
    if data_timestamp.tzinfo is None:
        data_timestamp = data_timestamp.replace(tzinfo=timezone.utc)

    delta = now - data_timestamp
    return delta.total_seconds() / 60.0


async def get_etherscan_gas_price() -> Dict[str, Any]:
    """
    Get current Ethereum gas price from Etherscan

    Returns:
        Dict with provider, category, data, timestamp, staleness, success, error
    """
    provider = "Etherscan"
    category = "blockchain_explorers"
    endpoint = "/api?module=gastracker&action=gasoracle"

    logger.info(f"Fetching gas price from {provider}")

    try:
        client = get_client()
        provider_config = config.get_provider(provider)

        if not provider_config:
            error_msg = f"Provider {provider} not configured"
            log_error(logger, provider, "config_error", error_msg, endpoint)
            return {
                "provider": provider,
                "category": category,
                "data": None,
                "timestamp": datetime.now(timezone.utc).isoformat(),
                "staleness_minutes": None,
                "success": False,
                "error": error_msg
            }

        # Check if API key is available
        if provider_config.requires_key and not provider_config.api_key:
            error_msg = f"API key required but not configured for {provider}"
            log_error(logger, provider, "auth_error", error_msg, endpoint)
            return {
                "provider": provider,
                "category": category,
                "data": None,
                "timestamp": datetime.now(timezone.utc).isoformat(),
                "staleness_minutes": None,
                "success": False,
                "error": error_msg,
                "error_type": "missing_api_key"
            }

        # Build request URL
        url = provider_config.endpoint_url
        params = {
            "module": "gastracker",
            "action": "gasoracle",
            "apikey": provider_config.api_key
        }

        # Make request
        response = await client.get(url, params=params, timeout=provider_config.timeout_ms // 1000)

        # Log request
        log_api_request(
            logger,
            provider,
            endpoint,
            response.get("response_time_ms", 0),
            "success" if response["success"] else "error",
            response.get("status_code")
        )

        if not response["success"]:
            error_msg = response.get("error_message", "Unknown error")
            log_error(logger, provider, response.get("error_type", "unknown"), error_msg, endpoint)
            return {
                "provider": provider,
                "category": category,
                "data": None,
                "timestamp": datetime.now(timezone.utc).isoformat(),
                "staleness_minutes": None,
                "success": False,
                "error": error_msg,
                "error_type": response.get("error_type")
            }

        # Extract data
        data = response["data"]

        # Etherscan returns real-time data, so staleness is minimal
        data_timestamp = datetime.now(timezone.utc)
        staleness = 0.0

        # Check API response status
        if isinstance(data, dict):
            api_status = data.get("status")
            if api_status == "0":
                error_msg = data.get("message", "API returned error status")
                log_error(logger, provider, "api_error", error_msg, endpoint)
                return {
                    "provider": provider,
                    "category": category,
                    "data": None,
                    "timestamp": datetime.now(timezone.utc).isoformat(),
                    "staleness_minutes": None,
                    "success": False,
                    "error": error_msg,
                    "error_type": "api_error"
                }

        logger.info(f"{provider} - {endpoint} - Gas price retrieved, staleness: {staleness:.2f}m")

        return {
            "provider": provider,
            "category": category,
            "data": data,
            "timestamp": datetime.now(timezone.utc).isoformat(),
            "data_timestamp": data_timestamp.isoformat(),
            "staleness_minutes": staleness,
            "success": True,
            "error": None,
            "response_time_ms": response.get("response_time_ms", 0)
        }

    except Exception as e:
        error_msg = f"Unexpected error: {str(e)}"
        log_error(logger, provider, "exception", error_msg, endpoint, exc_info=True)
        return {
            "provider": provider,
            "category": category,
            "data": None,
            "timestamp": datetime.now(timezone.utc).isoformat(),
            "staleness_minutes": None,
            "success": False,
            "error": error_msg,
            "error_type": "exception"
        }


async def get_bscscan_bnb_price() -> Dict[str, Any]:
    """
    Get BNB price from BscScan

    Returns:
        Dict with provider, category, data, timestamp, staleness, success, error
    """
    provider = "BscScan"
    category = "blockchain_explorers"
    endpoint = "/api?module=stats&action=bnbprice"

    logger.info(f"Fetching BNB price from {provider}")

    try:
        client = get_client()
        provider_config = config.get_provider(provider)

        if not provider_config:
            error_msg = f"Provider {provider} not configured"
            log_error(logger, provider, "config_error", error_msg, endpoint)
            return {
                "provider": provider,
                "category": category,
                "data": None,
                "timestamp": datetime.now(timezone.utc).isoformat(),
                "staleness_minutes": None,
                "success": False,
                "error": error_msg
            }

        # Check if API key is available
        if provider_config.requires_key and not provider_config.api_key:
            error_msg = f"API key required but not configured for {provider}"
            log_error(logger, provider, "auth_error", error_msg, endpoint)
            return {
                "provider": provider,
                "category": category,
                "data": None,
                "timestamp": datetime.now(timezone.utc).isoformat(),
                "staleness_minutes": None,
                "success": False,
                "error": error_msg,
                "error_type": "missing_api_key"
            }

        # Build request URL
        url = provider_config.endpoint_url
        params = {
            "module": "stats",
            "action": "bnbprice",
            "apikey": provider_config.api_key
        }

        # Make request
        response = await client.get(url, params=params, timeout=provider_config.timeout_ms // 1000)

        # Log request
        log_api_request(
            logger,
            provider,
            endpoint,
            response.get("response_time_ms", 0),
            "success" if response["success"] else "error",
            response.get("status_code")
        )

        if not response["success"]:
            error_msg = response.get("error_message", "Unknown error")
            log_error(logger, provider, response.get("error_type", "unknown"), error_msg, endpoint)
            return {
                "provider": provider,
                "category": category,
                "data": None,
                "timestamp": datetime.now(timezone.utc).isoformat(),
                "staleness_minutes": None,
                "success": False,
                "error": error_msg,
                "error_type": response.get("error_type")
            }

        # Extract data
        data = response["data"]

        # BscScan returns real-time data
        data_timestamp = datetime.now(timezone.utc)
        staleness = 0.0

        # Check API response status
        if isinstance(data, dict):
            api_status = data.get("status")
            if api_status == "0":
                error_msg = data.get("message", "API returned error status")
                log_error(logger, provider, "api_error", error_msg, endpoint)
                return {
                    "provider": provider,
                    "category": category,
                    "data": None,
                    "timestamp": datetime.now(timezone.utc).isoformat(),
                    "staleness_minutes": None,
                    "success": False,
                    "error": error_msg,
                    "error_type": "api_error"
                }

            # Extract timestamp if available
            if "result" in data and isinstance(data["result"], dict):
                if "ethusd_timestamp" in data["result"]:
                    try:
                        data_timestamp = datetime.fromtimestamp(
                            int(data["result"]["ethusd_timestamp"]),
                            tz=timezone.utc
                        )
                        staleness = calculate_staleness_minutes(data_timestamp)
                    except:
                        pass

        logger.info(f"{provider} - {endpoint} - BNB price retrieved, staleness: {staleness:.2f}m")

        return {
            "provider": provider,
            "category": category,
            "data": data,
            "timestamp": datetime.now(timezone.utc).isoformat(),
            "data_timestamp": data_timestamp.isoformat(),
            "staleness_minutes": staleness,
            "success": True,
            "error": None,
            "response_time_ms": response.get("response_time_ms", 0)
        }

    except Exception as e:
        error_msg = f"Unexpected error: {str(e)}"
        log_error(logger, provider, "exception", error_msg, endpoint, exc_info=True)
        return {
            "provider": provider,
            "category": category,
            "data": None,
            "timestamp": datetime.now(timezone.utc).isoformat(),
            "staleness_minutes": None,
            "success": False,
            "error": error_msg,
            "error_type": "exception"
        }


async def get_tronscan_stats() -> Dict[str, Any]:
    """
    Get TRX network statistics from TronScan

    Returns:
        Dict with provider, category, data, timestamp, staleness, success, error
    """
    provider = "TronScan"
    category = "blockchain_explorers"
    endpoint = "/system/status"

    logger.info(f"Fetching network stats from {provider}")

    try:
        client = get_client()
        provider_config = config.get_provider(provider)

        if not provider_config:
            error_msg = f"Provider {provider} not configured"
            log_error(logger, provider, "config_error", error_msg, endpoint)
            return {
                "provider": provider,
                "category": category,
                "data": None,
                "timestamp": datetime.now(timezone.utc).isoformat(),
                "staleness_minutes": None,
                "success": False,
                "error": error_msg
            }

        # Build request URL
        url = f"{provider_config.endpoint_url}{endpoint}"
        headers = {}

        # Add API key if available
        if provider_config.requires_key and provider_config.api_key:
            headers["TRON-PRO-API-KEY"] = provider_config.api_key

        # Make request
        response = await client.get(
            url,
            headers=headers if headers else None,
            timeout=provider_config.timeout_ms // 1000
        )

        # Log request
        log_api_request(
            logger,
            provider,
            endpoint,
            response.get("response_time_ms", 0),
            "success" if response["success"] else "error",
            response.get("status_code")
        )

        if not response["success"]:
            error_msg = response.get("error_message", "Unknown error")
            log_error(logger, provider, response.get("error_type", "unknown"), error_msg, endpoint)
            return {
                "provider": provider,
                "category": category,
                "data": None,
                "timestamp": datetime.now(timezone.utc).isoformat(),
                "staleness_minutes": None,
                "success": False,
                "error": error_msg,
                "error_type": response.get("error_type")
            }

        # Extract data
        data = response["data"]

        # TronScan returns real-time data
        data_timestamp = datetime.now(timezone.utc)
        staleness = 0.0

        # Parse timestamp if available in response
        if isinstance(data, dict):
            # TronScan may include timestamp in various fields
            if "timestamp" in data:
                try:
                    data_timestamp = datetime.fromtimestamp(
                        int(data["timestamp"]) / 1000,  # TronScan uses milliseconds
                        tz=timezone.utc
                    )
                    staleness = calculate_staleness_minutes(data_timestamp)
                except:
                    pass

        logger.info(f"{provider} - {endpoint} - Network stats retrieved, staleness: {staleness:.2f}m")

        return {
            "provider": provider,
            "category": category,
            "data": data,
            "timestamp": datetime.now(timezone.utc).isoformat(),
            "data_timestamp": data_timestamp.isoformat(),
            "staleness_minutes": staleness,
            "success": True,
            "error": None,
            "response_time_ms": response.get("response_time_ms", 0)
        }

    except Exception as e:
        error_msg = f"Unexpected error: {str(e)}"
        log_error(logger, provider, "exception", error_msg, endpoint, exc_info=True)
        return {
            "provider": provider,
            "category": category,
            "data": None,
            "timestamp": datetime.now(timezone.utc).isoformat(),
            "staleness_minutes": None,
            "success": False,
            "error": error_msg,
            "error_type": "exception"
        }


async def collect_explorer_data() -> List[Dict[str, Any]]:
    """
    Main function to collect blockchain explorer data from all sources

    Returns:
        List of results from all explorer data collectors
    """
    logger.info("Starting blockchain explorer data collection from all sources")

    # Run all collectors concurrently
    results = await asyncio.gather(
        get_etherscan_gas_price(),
        get_bscscan_bnb_price(),
        get_tronscan_stats(),
        return_exceptions=True
    )

    # Process results
    processed_results = []
    for result in results:
        if isinstance(result, Exception):
            logger.error(f"Collector failed with exception: {str(result)}")
            processed_results.append({
                "provider": "Unknown",
                "category": "blockchain_explorers",
                "data": None,
                "timestamp": datetime.now(timezone.utc).isoformat(),
                "staleness_minutes": None,
                "success": False,
                "error": str(result),
                "error_type": "exception"
            })
        else:
            processed_results.append(result)

    # Log summary
    successful = sum(1 for r in processed_results if r.get("success", False))
    logger.info(f"Explorer data collection complete: {successful}/{len(processed_results)} successful")

    return processed_results


class ExplorerDataCollector:
    """
    Explorer Data Collector class for WebSocket streaming interface
    Wraps the standalone explorer data collection functions
    """

    def __init__(self, config: Any = None):
        """
        Initialize the explorer data collector

        Args:
            config: Configuration object (optional, for compatibility)
        """
        self.config = config
        self.logger = logger

    async def collect(self) -> Dict[str, Any]:
        """
        Collect blockchain explorer data from all sources

        Returns:
            Dict with aggregated explorer data
        """
        results = await collect_explorer_data()

        # Aggregate data for WebSocket streaming
        aggregated = {
            "latest_block": None,
            "network_hashrate": None,
            "difficulty": None,
            "mempool_size": None,
            "transactions_count": None,
            "gas_prices": {},
            "sources": [],
            "timestamp": datetime.now(timezone.utc).isoformat()
        }

        for result in results:
            if result.get("success") and result.get("data"):
                provider = result.get("provider", "unknown")
                aggregated["sources"].append(provider)

                data = result["data"]

                # Parse gas price data
                if "result" in data and isinstance(data["result"], dict):
                    gas_data = data["result"]
                    if provider == "Etherscan":
                        aggregated["gas_prices"]["ethereum"] = {
                            "safe": gas_data.get("SafeGasPrice"),
                            "propose": gas_data.get("ProposeGasPrice"),
                            "fast": gas_data.get("FastGasPrice")
                        }
                    elif provider == "BscScan":
                        aggregated["gas_prices"]["bsc"] = gas_data.get("result")

                # Parse network stats
                if provider == "TronScan" and "data" in data:
                    stats = data["data"]
                    aggregated["latest_block"] = stats.get("latestBlock")
                    aggregated["transactions_count"] = stats.get("totalTransaction")

        return aggregated


# Example usage
if __name__ == "__main__":
    async def main():
        results = await collect_explorer_data()

        print("\n=== Blockchain Explorer Data Collection Results ===")
        for result in results:
            print(f"\nProvider: {result['provider']}")
            print(f"Success: {result['success']}")
            print(f"Staleness: {result.get('staleness_minutes', 'N/A')} minutes")
            if result['success']:
                print(f"Response Time: {result.get('response_time_ms', 0):.2f}ms")
            else:
                print(f"Error: {result.get('error', 'Unknown')}")

    asyncio.run(main())