"""
vTiger Cloud CRM Integration Service
Handles subscription and sales order data retrieval
"""
import logging
import aiohttp
from typing import List, Dict, Optional
from app.core.config import settings

logger = logging.getLogger(__name__)


class VTigerService:
    """Service for integrating with vTiger Cloud CRM via REST API"""
    
    def __init__(self):
        self.base_url = getattr(settings, 'VTIGER_URL', None)
        self.username = getattr(settings, 'VTIGER_USERNAME', None)
        self.api_key = getattr(settings, 'VTIGER_API_KEY', None)
        
        # REST API endpoint
        if self.base_url:
            self.rest_endpoint = f"{self.base_url}/restapi/v1/vtiger/default"
        else:
            self.rest_endpoint = None
        
        if not all([self.base_url, self.username, self.api_key]):
            logger.warning("⚠️ vTiger credentials not fully configured")
    
    def _get_auth(self):
        """Get HTTP Basic Auth credentials"""
        if not self.api_key:
            raise ValueError("VTIGER_API_KEY not configured")
        return aiohttp.BasicAuth(self.username, self.api_key)
    
    async def query(self, query_string: str) -> List[Dict]:
        """
        Execute a query on vTiger REST API
        
        Args:
            query_string: SQL-like query (e.g., "SELECT * FROM Accounts;")
            
        Returns:
            List of records
        """
        if not self.rest_endpoint:
            raise ValueError("VTIGER_URL not configured")
        
        try:
            auth = self._get_auth()
            async with aiohttp.ClientSession() as session:
                async with session.get(
                    f"{self.rest_endpoint}/query",
                    params={"query": query_string},
                    auth=auth
                ) as response:
                    text = await response.text()
                    
                    if response.status == 200:
                        # vTiger returns text/json instead of application/json
                        import json
                        try:
                            data = json.loads(text)
                        except json.JSONDecodeError as e:
                            logger.error(f"❌ Invalid JSON in query response: {text[:200]}")
                            return []
                        
                        if data.get('success'):
                            result = data.get('result', [])
                            logger.info(f"✅ Query returned {len(result)} records")
                            return result
                        else:
                            logger.error(f"❌ vTiger query failed: {data.get('error')}")
                            return []
                    else:
                        logger.error(f"❌ vTiger query HTTP error {response.status}")
                        logger.error(f"Query: {query_string}")
                        logger.error(f"Response: {text[:500]}")
                        return []
        except Exception as e:
            logger.error(f"❌ vTiger query error: {e}")
            return []
    
    async def get_customer_sales_orders(self, vtiger_account_id: str) -> List[Dict]:
        """
        Fetch sales orders for a customer from vTiger
        
        Args:
            vtiger_account_id: vTiger account ID (e.g., "3x760")
            
        Returns:
            List of sales order records
        """
        if not vtiger_account_id:
            logger.warning("⚠️ No vTiger account ID provided")
            return []
        
        try:
            # Query for sales orders linked to this account
            query = f"SELECT * FROM SalesOrder WHERE account_id='{vtiger_account_id}';"
            
            logger.info(f"🔍 Fetching sales orders for vTiger account {vtiger_account_id}")
            orders = await self.query(query)
            
            logger.info(f"✅ Found {len(orders)} sales orders")
            return orders
            
        except Exception as e:
            logger.error(f"❌ Error fetching sales orders: {e}")
            return []
    
    async def get_customer_subscriptions(self, vtiger_account_id: str) -> List[Dict]:
        """
        Fetch subscriptions for a customer from vTiger
        
        Args:
            vtiger_account_id: vTiger account ID (e.g., "3x760")
            
        Returns:
            List of subscription records
        """
        if not vtiger_account_id:
            logger.warning("⚠️ No vTiger account ID provided")
            return []
        
        try:
            # Query for subscriptions linked to this account (note: module name is singular "Subscription")
            query = f"SELECT * FROM Subscription WHERE account_id='{vtiger_account_id}';"
            
            logger.info(f"🔍 Fetching subscriptions for vTiger account {vtiger_account_id}")
            subscriptions = await self.query(query)
            
            logger.info(f"✅ Found {len(subscriptions)} subscriptions")
            return subscriptions
            
        except Exception as e:
            logger.error(f"❌ Error fetching subscriptions: {e}")
            return []
    
    async def test_connection(self) -> bool:
        """
        Test vTiger connection using /me endpoint
        
        Returns:
            True if connection successful
        """
        if not self.rest_endpoint:
            raise ValueError("VTIGER_URL not configured in .env")
        
        try:
            auth = self._get_auth()
            logger.info(f"🔑 Testing vTiger connection...")
            
            async with aiohttp.ClientSession() as session:
                async with session.get(
                    f"{self.rest_endpoint}/me",
                    auth=auth
                ) as response:
                    if response.status == 200:
                        # vTiger returns text/json instead of application/json
                        text = await response.text()
                        import json
                        data = json.loads(text)
                        
                        if data.get('success'):
                            user_name = data['result'].get('user_name')
                            logger.info(f"✅ vTiger connection successful (user: {user_name})")
                            return True
                        else:
                            logger.error(f"❌ vTiger API returned success=false: {data}")
                            return False
                    else:
                        error_text = await response.text()
                        logger.error(f"❌ vTiger connection failed: HTTP {response.status}: {error_text}")
                        return False
                        
        except Exception as e:
            logger.error(f"❌ vTiger connection error: {e}")
            return False


# Singleton instance
_vtiger_service = None

def get_vtiger_service() -> VTigerService:
    """Get or create vTiger service singleton"""
    global _vtiger_service
    if _vtiger_service is None:
        _vtiger_service = VTigerService()
    return _vtiger_service