# shared/clients/alert_processor_client.py
"""
Alert Processor Service Client - Inter-service communication
Handles communication with the alert processor service for alert lifecycle management
"""

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

from shared.clients.base_service_client import BaseServiceClient
from shared.config.base import BaseServiceSettings

logger = structlog.get_logger()


class AlertProcessorClient(BaseServiceClient):
    """Client for communicating with the alert processor service via gateway"""

    def __init__(self, config: BaseServiceSettings, calling_service_name: str = "unknown"):
        super().__init__(calling_service_name, config)

    def get_service_base_path(self) -> str:
        """Return the base path for alert processor service APIs"""
        return "/api/v1"

    # ================================================================
    # ALERT LIFECYCLE MANAGEMENT
    # ================================================================

    async def acknowledge_alerts_by_metadata(
        self,
        tenant_id: UUID,
        alert_type: str,
        metadata_filter: Dict[str, Any],
        acknowledged_by: Optional[str] = None
    ) -> Dict[str, Any]:
        """
        Acknowledge all active alerts matching alert type and metadata.

        Used when user actions trigger alert acknowledgment (e.g., approving a PO).

        Args:
            tenant_id: Tenant UUID
            alert_type: Alert type to filter (e.g., 'po_approval_needed')
            metadata_filter: Metadata fields to match (e.g., {'po_id': 'uuid'})
            acknowledged_by: Optional user ID who acknowledged

        Returns:
            {
                "success": true,
                "acknowledged_count": 2,
                "alert_ids": ["uuid1", "uuid2"]
            }
        """
        try:
            payload = {
                "alert_type": alert_type,
                "metadata_filter": metadata_filter
            }

            if acknowledged_by:
                payload["acknowledged_by"] = acknowledged_by

            result = await self.post(
                f"tenants/{tenant_id}/alerts/acknowledge-by-metadata",
                tenant_id=str(tenant_id),
                json=payload
            )

            if result and result.get("success"):
                logger.info(
                    "Acknowledged alerts by metadata",
                    tenant_id=str(tenant_id),
                    alert_type=alert_type,
                    count=result.get("acknowledged_count", 0),
                    calling_service=self.calling_service_name
                )

            return result or {"success": False, "acknowledged_count": 0, "alert_ids": []}

        except Exception as e:
            logger.error(
                "Error acknowledging alerts by metadata",
                error=str(e),
                tenant_id=str(tenant_id),
                alert_type=alert_type,
                metadata_filter=metadata_filter,
                calling_service=self.calling_service_name
            )
            return {"success": False, "acknowledged_count": 0, "alert_ids": [], "error": str(e)}

    async def resolve_alerts_by_metadata(
        self,
        tenant_id: UUID,
        alert_type: str,
        metadata_filter: Dict[str, Any],
        resolved_by: Optional[str] = None
    ) -> Dict[str, Any]:
        """
        Resolve all active alerts matching alert type and metadata.

        Used when user actions complete an alert's underlying issue (e.g., marking delivery received).

        Args:
            tenant_id: Tenant UUID
            alert_type: Alert type to filter (e.g., 'delivery_overdue')
            metadata_filter: Metadata fields to match (e.g., {'po_id': 'uuid'})
            resolved_by: Optional user ID who resolved

        Returns:
            {
                "success": true,
                "resolved_count": 1,
                "alert_ids": ["uuid1"]
            }
        """
        try:
            payload = {
                "alert_type": alert_type,
                "metadata_filter": metadata_filter
            }

            if resolved_by:
                payload["resolved_by"] = resolved_by

            result = await self.post(
                f"tenants/{tenant_id}/alerts/resolve-by-metadata",
                tenant_id=str(tenant_id),
                json=payload
            )

            if result and result.get("success"):
                logger.info(
                    "Resolved alerts by metadata",
                    tenant_id=str(tenant_id),
                    alert_type=alert_type,
                    count=result.get("resolved_count", 0),
                    calling_service=self.calling_service_name
                )

            return result or {"success": False, "resolved_count": 0, "alert_ids": []}

        except Exception as e:
            logger.error(
                "Error resolving alerts by metadata",
                error=str(e),
                tenant_id=str(tenant_id),
                alert_type=alert_type,
                metadata_filter=metadata_filter,
                calling_service=self.calling_service_name
            )
            return {"success": False, "resolved_count": 0, "alert_ids": [], "error": str(e)}

    async def get_active_alerts(
        self,
        tenant_id: UUID,
        priority_level: Optional[str] = None,
        limit: int = 100
    ) -> List[Dict[str, Any]]:
        """
        Get active alerts for a tenant.

        Args:
            tenant_id: Tenant UUID
            priority_level: Optional priority filter (critical, important, standard, info)
            limit: Maximum number of alerts to return

        Returns:
            List of alert dictionaries
        """
        try:
            params = {
                "status": "active",
                "limit": limit
            }

            if priority_level:
                params["priority_level"] = priority_level

            result = await self.get(
                f"tenants/{tenant_id}/alerts",
                tenant_id=str(tenant_id),
                params=params
            )

            alerts = result.get("alerts", []) if isinstance(result, dict) else []

            logger.info(
                "Retrieved active alerts",
                tenant_id=str(tenant_id),
                count=len(alerts),
                calling_service=self.calling_service_name
            )

            return alerts

        except Exception as e:
            logger.error(
                "Error fetching active alerts",
                error=str(e),
                tenant_id=str(tenant_id),
                calling_service=self.calling_service_name
            )
            return []


# Factory function for easy import
def get_alert_processor_client(config: BaseServiceSettings, calling_service_name: str) -> AlertProcessorClient:
    """
    Factory function to create an AlertProcessorClient instance.

    Args:
        config: Service configuration with gateway URL
        calling_service_name: Name of the service making the call (for logging)

    Returns:
        AlertProcessorClient instance
    """
    return AlertProcessorClient(config, calling_service_name)