import logging
from pathlib import Path
from urllib.parse import urlparse
import requests
import yaml
import whois
from datetime import datetime
from ipaddress import ip_address
import socket

# Local imports
from .utils.cache_db import get_cache
from .utils.settings import get_settings

# Configure logging
logging.basicConfig(level=logging.INFO, format="[%(levelname)s] %(message)s")

# Init cache
cache = get_cache("/data/cache.db")
settings = get_settings()

# Load BEC words
BEC_WORDS_FILE = Path(__file__).parent.parent / "config" / "bec_words.yaml"
if BEC_WORDS_FILE.exists():
    with open(BEC_WORDS_FILE, "r", encoding="utf-8") as f:
        BEC_WORDS = yaml.safe_load(f).get("words", [])
else:
    BEC_WORDS = []

# 24 hours * 60 minutes
days = 24 * 60 

GEOIP_DEFAULT_TTL = settings.cache.geoip_cache_days * days
WHOIS_DEFAULT_TTL = settings.cache.whois_cache_days * days

def enrich_url(url: str) -> dict:
    """Perform WHOIS, GeoIP, and BEC word enrichment."""
    result = {}

    # Extract hostname
    parsed = urlparse(url)
    hostname = parsed.hostname or url  # fallback if parsing fails

    # --- WHOIS ---
    result.update(enrich_whois(hostname))

    # --- GeoIP ---
    result["geoip"] = enrich_geoip(hostname)

    # --- BEC Words ---
    result["bec_words"] = [w for w in BEC_WORDS if w.lower() in url.lower()]

    return result


def enrich_whois(hostname: str) -> dict:
    """Fetch WHOIS info using python-whois with safe type handling."""
    cache_key = f"whois:{hostname}"
    cached = cache.read(cache_key)
    if cached:
        logging.info(f"[CACHE HIT] for WHOIS: {hostname}")
        return cached

    logging.info(f"[CACHE MISS] for WHOIS: {hostname}")
    result = {}
    try:
        w = whois.whois(hostname)

        def format_dt(val):
            if isinstance(val, list):
                return ", ".join([v.strftime("%Y-%m-%d %H:%M:%S") if isinstance(v, datetime) else str(v) for v in val])
            elif isinstance(val, datetime):
                return val.strftime("%Y-%m-%d %H:%M:%S")
            elif val is None:
                return "Possible Privacy"
            else:
                return str(val)
        
        result["whois"] = {
            "registrar": format_dt(getattr(w, "registrar", None)),
            "creation_date": format_dt(getattr(w, "creation_date", None)),
            "expiration_date": format_dt(getattr(w, "expiration_date", None)),
            "owner": format_dt(getattr(w, "org", None))
        }

    except Exception as e:
        logging.warning(f"WHOIS lookup failed for {hostname}: {e}")
        try:
            # fallback raw whois text
            import subprocess
            raw_output = subprocess.check_output(["whois", hostname], encoding="utf-8", errors="ignore")
            result["whois"] = {}
            result["raw_whois"] = raw_output
        except Exception as raw_e:
            logging.error(f"Raw WHOIS also failed: {raw_e}")
            result["whois"] = {}
            result["raw_whois"] = "N/A"

    cache.create(cache_key, result, WHOIS_DEFAULT_TTL)
    return result


def enrich_geoip(hostname: str) -> dict:
    """Resolve hostname to IPs and fetch info from ip-api.com."""
    geo_info = {}
    ips = extract_ips_from_url(hostname)
    for ip in ips:
        ip_str = str(ip)
        cache_key = f"geoip:{ip_str}"
        cached = cache.read(cache_key)
        if cached:
            logging.info(f"[CACHE HIT] for GEOIP: {ip}")
            geo_info[ip_str] = cached
            continue

        logging.info(f"[CACHE MISS] for GEOIP: {ip}")
        try:
            resp = requests.get(f"http://ip-api.com/json/{ip_str}?fields=24313855", timeout=5)
            if resp.status_code == 200:
                geo_info[ip_str] = resp.json()
            else:
                geo_info[ip_str] = {"error": f"HTTP {resp.status_code}"}
        except Exception as e:
            geo_info[ip_str] = {"error": str(e)}

        cache.create(cache_key, geo_info[ip_str],GEOIP_DEFAULT_TTL)

    return geo_info


def extract_ips_from_url(hostname: str):
    """Resolve hostname to IPs."""
    try:
        info = socket.getaddrinfo(hostname, None)
        return list({ip_address(x[4][0]) for x in info})
    except Exception:
        return []