"""
Drop Status Checker
====================
Dedicated RDAP checker for dropped domains.
Correctly identifies pending_delete, redemption, and available status.
"""

import httpx
import logging
from dataclasses import dataclass
from typing import Optional

logger = logging.getLogger(__name__)

# RDAP endpoints for different TLDs
RDAP_ENDPOINTS = {
    # ccTLDs
    'ch': 'https://rdap.nic.ch/domain/',
    'li': 'https://rdap.nic.ch/domain/',
    'de': 'https://rdap.denic.de/domain/',
    # gTLDs via CentralNic
    'online': 'https://rdap.centralnic.com/online/domain/',
    'xyz': 'https://rdap.centralnic.com/xyz/domain/',
    'club': 'https://rdap.nic.club/domain/',
    # gTLDs via Afilias/Donuts
    'info': 'https://rdap.afilias.net/rdap/info/domain/',
    'biz': 'https://rdap.afilias.net/rdap/biz/domain/',
    'org': 'https://rdap.publicinterestregistry.org/rdap/org/domain/',
    # Google TLDs
    'dev': 'https://rdap.nic.google/domain/',
    'app': 'https://rdap.nic.google/domain/',
}


@dataclass
class DropStatus:
    """Status of a dropped domain."""
    domain: str
    status: str  # 'available', 'dropping_soon', 'taken', 'unknown'
    rdap_status: list[str]
    can_register_now: bool
    should_monitor: bool
    message: str


async def check_drop_status(domain: str) -> DropStatus:
    """
    Check the real status of a dropped domain via RDAP.
    
    Returns:
        DropStatus with one of:
        - 'available': Domain can be registered NOW
        - 'dropping_soon': Domain is in pending delete/redemption (monitor it!)
        - 'taken': Domain was re-registered
        - 'unknown': Could not determine status
    """
    tld = domain.split('.')[-1].lower()
    
    endpoint = RDAP_ENDPOINTS.get(tld)
    if not endpoint:
        # Try generic lookup
        logger.warning(f"No RDAP endpoint for .{tld}, returning unknown")
        return DropStatus(
            domain=domain,
            status='unknown',
            rdap_status=[],
            can_register_now=False,
            should_monitor=False,
            message=f"No RDAP endpoint for .{tld}"
        )
    
    url = f"{endpoint}{domain}"
    
    try:
        async with httpx.AsyncClient(timeout=10) as client:
            resp = await client.get(url)
            
            # 404 = Domain not found = AVAILABLE!
            if resp.status_code == 404:
                return DropStatus(
                    domain=domain,
                    status='available',
                    rdap_status=[],
                    can_register_now=True,
                    should_monitor=False,
                    message="Domain is available for registration!"
                )
            
            # 200 = Domain exists in registry
            if resp.status_code == 200:
                data = resp.json()
                rdap_status = data.get('status', [])
                status_lower = ' '.join(str(s).lower() for s in rdap_status)
                
                # Check for pending delete / redemption status
                is_pending = any(x in status_lower for x in [
                    'pending delete', 'pendingdelete',
                    'pending purge', 'pendingpurge',
                    'redemption period', 'redemptionperiod',
                    'pending restore', 'pendingrestore',
                ])
                
                if is_pending:
                    return DropStatus(
                        domain=domain,
                        status='dropping_soon',
                        rdap_status=rdap_status,
                        can_register_now=False,
                        should_monitor=True,
                        message="Domain is being deleted. Track it to get notified when available!"
                    )
                
                # Domain is actively registered
                return DropStatus(
                    domain=domain,
                    status='taken',
                    rdap_status=rdap_status,
                    can_register_now=False,
                    should_monitor=False,
                    message="Domain was re-registered"
                )
            
            # Other status code
            logger.warning(f"RDAP returned {resp.status_code} for {domain}")
            return DropStatus(
                domain=domain,
                status='unknown',
                rdap_status=[],
                can_register_now=False,
                should_monitor=False,
                message=f"RDAP returned HTTP {resp.status_code}"
            )
            
    except httpx.TimeoutException:
        logger.warning(f"RDAP timeout for {domain}")
        return DropStatus(
            domain=domain,
            status='unknown',
            rdap_status=[],
            can_register_now=False,
            should_monitor=False,
            message="RDAP timeout"
        )
    except Exception as e:
        logger.warning(f"RDAP error for {domain}: {e}")
        return DropStatus(
            domain=domain,
            status='unknown',
            rdap_status=[],
            can_register_now=False,
            should_monitor=False,
            message=str(e)
        )