# ================================================================
# shared/notifications/alert_integration.py
# ================================================================
"""
Simplified Alert Integration - Placeholder for unified alert system
"""

import structlog
from typing import Optional, Dict, Any, List
from datetime import datetime
import enum
from uuid import UUID

logger = structlog.get_logger()


class AlertSeverity(enum.Enum):
    """Alert severity levels"""
    LOW = "low"
    MEDIUM = "medium"
    HIGH = "high"
    CRITICAL = "critical"


class AlertType(enum.Enum):
    """Alert types for different bakery operations"""
    # Production Alerts
    PRODUCTION_DELAY = "production_delay"
    BATCH_FAILURE = "batch_failure"
    EQUIPMENT_MALFUNCTION = "equipment_malfunction"
    TEMPERATURE_VIOLATION = "temperature_violation"
    QUALITY_ISSUE = "quality_issue"
    
    # Inventory Alerts
    LOW_STOCK = "low_stock"
    OUT_OF_STOCK = "out_of_stock"
    EXPIRATION_WARNING = "expiration_warning"
    TEMPERATURE_BREACH = "temperature_breach"
    FOOD_SAFETY_VIOLATION = "food_safety_violation"
    
    # Supplier Alerts
    SUPPLIER_PERFORMANCE = "supplier_performance"
    DELIVERY_DELAY = "delivery_delay"
    QUALITY_ISSUES = "quality_issues"
    CONTRACT_EXPIRY = "contract_expiry"
    
    # Order Alerts
    ORDER_DELAY = "order_delay"
    CUSTOMER_COMPLAINT = "customer_complaint"
    PAYMENT_ISSUE = "payment_issue"


class AlertSource(enum.Enum):
    """Sources that can generate alerts"""
    PRODUCTION_SERVICE = "production_service"
    INVENTORY_SERVICE = "inventory_service"
    SUPPLIERS_SERVICE = "suppliers_service"
    ORDERS_SERVICE = "orders_service"
    EXTERNAL_SERVICE = "external_service"


class AlertCategory(enum.Enum):
    """Alert categories for organization"""
    OPERATIONAL = "operational"
    QUALITY = "quality"
    SAFETY = "safety"
    FINANCIAL = "financial"
    COMPLIANCE = "compliance"


class AlertIntegration:
    """
    Simplified alert integration that logs alerts.
    TODO: Implement proper service-to-service communication for notifications
    """
    
    def __init__(self):
        self.logger = structlog.get_logger("alert_integration")
    
    async def create_alert(
        self,
        tenant_id: UUID,
        alert_type: AlertType,
        severity: AlertSeverity,
        title: str,
        message: str,
        source: AlertSource,
        category: AlertCategory = None,
        entity_id: Optional[UUID] = None,
        metadata: Optional[Dict[str, Any]] = None,
        recipients: Optional[List[UUID]] = None
    ) -> Optional[str]:
        """
        Create a new alert (currently just logs it)
        
        Returns:
            Alert ID if successful, None otherwise
        """
        try:
            alert_data = {
                "tenant_id": str(tenant_id),
                "alert_type": alert_type.value,
                "severity": severity.value,
                "title": title,
                "message": message,
                "source": source.value,
                "category": category.value if category else None,
                "entity_id": str(entity_id) if entity_id else None,
                "metadata": metadata or {},
                "recipients": [str(r) for r in recipients] if recipients else [],
                "timestamp": datetime.utcnow().isoformat()
            }
            
            # For now, just log the alert
            self.logger.info(
                "Alert created",
                **alert_data
            )
            
            # Return a mock alert ID
            return f"alert_{datetime.utcnow().timestamp()}"
            
        except Exception as e:
            self.logger.error(
                "Failed to create alert",
                tenant_id=str(tenant_id),
                alert_type=alert_type.value,
                error=str(e)
            )
            return None
    
    async def acknowledge_alert(self, alert_id: str, user_id: UUID) -> bool:
        """Acknowledge an alert (currently just logs it)"""
        try:
            self.logger.info(
                "Alert acknowledged",
                alert_id=alert_id,
                user_id=str(user_id),
                timestamp=datetime.utcnow().isoformat()
            )
            return True
        except Exception as e:
            self.logger.error(
                "Failed to acknowledge alert",
                alert_id=alert_id,
                error=str(e)
            )
            return False
    
    async def resolve_alert(self, alert_id: str, user_id: UUID, resolution: str = None) -> bool:
        """Resolve an alert (currently just logs it)"""
        try:
            self.logger.info(
                "Alert resolved",
                alert_id=alert_id,
                user_id=str(user_id),
                resolution=resolution,
                timestamp=datetime.utcnow().isoformat()
            )
            return True
        except Exception as e:
            self.logger.error(
                "Failed to resolve alert",
                alert_id=alert_id,
                error=str(e)
            )
            return False

    # Convenience methods for specific alert types
    async def create_inventory_alert(
        self, 
        tenant_id: UUID, 
        alert_type: AlertType, 
        severity: AlertSeverity,
        title: str, 
        message: str, 
        item_id: UUID = None,
        **kwargs
    ) -> Optional[str]:
        """Create an inventory-specific alert"""
        metadata = kwargs.pop('metadata', {})
        if item_id:
            metadata['item_id'] = str(item_id)
        
        return await self.create_alert(
            tenant_id=tenant_id,
            alert_type=alert_type,
            severity=severity,
            title=title,
            message=message,
            source=AlertSource.INVENTORY_SERVICE,
            category=AlertCategory.OPERATIONAL,
            entity_id=item_id,
            metadata=metadata,
            **kwargs
        )

    async def create_production_alert(
        self, 
        tenant_id: UUID, 
        alert_type: AlertType, 
        severity: AlertSeverity,
        title: str, 
        message: str, 
        batch_id: UUID = None,
        equipment_id: UUID = None,
        **kwargs
    ) -> Optional[str]:
        """Create a production-specific alert"""
        metadata = kwargs.pop('metadata', {})
        if batch_id:
            metadata['batch_id'] = str(batch_id)
        if equipment_id:
            metadata['equipment_id'] = str(equipment_id)
        
        return await self.create_alert(
            tenant_id=tenant_id,
            alert_type=alert_type,
            severity=severity,
            title=title,
            message=message,
            source=AlertSource.PRODUCTION_SERVICE,
            category=AlertCategory.OPERATIONAL,
            metadata=metadata,
            **kwargs
        )

    async def create_supplier_alert(
        self, 
        tenant_id: UUID, 
        alert_type: AlertType, 
        severity: AlertSeverity,
        title: str, 
        message: str, 
        supplier_id: UUID = None,
        **kwargs
    ) -> Optional[str]:
        """Create a supplier-specific alert"""
        metadata = kwargs.pop('metadata', {})
        if supplier_id:
            metadata['supplier_id'] = str(supplier_id)
        
        return await self.create_alert(
            tenant_id=tenant_id,
            alert_type=alert_type,
            severity=severity,
            title=title,
            message=message,
            source=AlertSource.SUPPLIERS_SERVICE,
            category=AlertCategory.QUALITY,
            entity_id=supplier_id,
            metadata=metadata,
            **kwargs
        )

    async def create_order_alert(
        self, 
        tenant_id: UUID, 
        alert_type: AlertType, 
        severity: AlertSeverity,
        title: str, 
        message: str, 
        order_id: UUID = None,
        customer_id: UUID = None,
        **kwargs
    ) -> Optional[str]:
        """Create an order-specific alert"""
        metadata = kwargs.pop('metadata', {})
        if order_id:
            metadata['order_id'] = str(order_id)
        if customer_id:
            metadata['customer_id'] = str(customer_id)
        
        return await self.create_alert(
            tenant_id=tenant_id,
            alert_type=alert_type,
            severity=severity,
            title=title,
            message=message,
            source=AlertSource.ORDERS_SERVICE,
            category=AlertCategory.OPERATIONAL,
            entity_id=order_id,
            metadata=metadata,
            **kwargs
        )