# Copyright (c) 2025 Patrick Motsch
# All rights reserved.
"""
Progress Logger utility for standardized progress reporting in workflows.
Provides centralized progress management with start/update/complete methods.
"""

import time
import logging
from typing import Dict, Any, Optional

logger = logging.getLogger(__name__)


class ProgressLogger:
    """Centralized progress logger for workflow operations with hierarchical support."""
    
    def __init__(self, services):
        """Initialize progress logger.
        
        Args:
            services: Services object for accessing chat service and workflow
        """
        self.services = services
        self.activeOperations = {}
        self.finishedOperations = set()  # Track finished operations to avoid repeated warnings
        self.operationLogIds = {}  # Map operationId to the log entry ID for parent reference
    
    def startOperation(self, operationId: str, serviceName: str, actionName: str, context: str = "", parentOperationId: Optional[str] = None):
        """Start a new long-running operation.
        
        Args:
            operationId: Unique identifier for the operation
            serviceName: Name of the service (e.g., "Extract", "AI", "Generate")
            actionName: Name of the action being performed
            context: Additional context information
            parentOperationId: Optional parent operation ID (operationId of parent operation) for hierarchical display
                              The parentId in ChatLog will be set to this parentOperationId
        """
        # Remove from finished operations if it was there (for restart scenarios)
        self.finishedOperations.discard(operationId)
        
        self.activeOperations[operationId] = {
            'service': serviceName,
            'action': actionName,
            'context': context,
            'startTime': time.time(),
            'parentOperationId': parentOperationId  # Store parent's operationId, not log entry ID
        }
        # Use parentOperationId as parentId in ChatLog (parentId should be the operationId of parent)
        logId = self._logProgress(operationId, 0.0, f"Starting {actionName}", parentOperationId=parentOperationId)
        if logId:
            self.operationLogIds[operationId] = logId
        logger.debug(f"Started operation {operationId}: {serviceName} - {actionName}")
    
    def updateOperation(self, operationId: str, progress: float, statusUpdate: str = ""):
        """Update progress for an operation.
        
        Args:
            operationId: Unique identifier for the operation
            progress: Progress value between 0.0 and 1.0
            statusUpdate: Additional status information
        """
        if operationId not in self.activeOperations:
            # Only warn once per operation ID if it was already finished
            if operationId in self.finishedOperations:
                # Operation already finished - silently ignore subsequent updates
                return
            else:
                # Operation never started - log warning once and mark as problematic
                logger.warning(f"Operation {operationId} not found for progress update (operation never started)")
                self.finishedOperations.add(operationId)  # Prevent repeated warnings
            return
            
        op = self.activeOperations[operationId]
        context = f"{op['context']} {statusUpdate}".strip()
        # Use the same parentOperationId as the start operation - all logs (start/update/finish) share the same parent
        parentOperationId = op.get('parentOperationId')
        self._logProgress(operationId, progress, context, parentOperationId=parentOperationId)
        logger.debug(f"Updated operation {operationId}: {progress:.2f} - {context}")
    
    def finishOperation(self, operationId: str, success: bool = True):
        """Complete an operation.
        
        Args:
            operationId: Unique identifier for the operation
            success: Whether the operation completed successfully
        """
        if operationId not in self.activeOperations:
            # Only warn once if operation was already finished
            if operationId not in self.finishedOperations:
                logger.warning(f"Operation {operationId} not found for completion (operation never started or already finished)")
                self.finishedOperations.add(operationId)
            return
            
        op = self.activeOperations[operationId]
        finalProgress = 1.0 if success else 0.0
        status = "Done" if success else "Failed"
        
        # Use the same parentOperationId as the start operation - all logs (start/update/finish) share the same parent
        parentOperationId = op.get('parentOperationId')
        
        # Create completion log BEFORE removing from activeOperations
        self._logProgress(operationId, finalProgress, status, parentOperationId=parentOperationId)
        
        # Log completion time
        duration = time.time() - op['startTime']
        logger.info(f"Completed operation {operationId}: {op['service']} - {op['action']} in {duration:.2f}s")
        
        # Remove from active operations AFTER creating the log
        del self.activeOperations[operationId]
        if operationId in self.operationLogIds:
            del self.operationLogIds[operationId]
        
        # Mark as finished to prevent repeated warnings from updateOperation calls
        self.finishedOperations.add(operationId)
    
    def _logProgress(self, operationId: str, progress: float, status: str, parentOperationId: Optional[str] = None) -> Optional[str]:
        """Create standardized ChatLog entry.
        
        Args:
            operationId: Unique identifier for the operation
            progress: Progress value between 0.0 and 1.0
            status: Status information for the log entry
            parentOperationId: Optional parent operation ID (operationId of parent operation) for hierarchical display
                              This will be set as parentId in ChatLog (parentId = operationId of parent)
            
        Returns:
            The created log entry ID, or None if creation failed
        """
        if operationId not in self.activeOperations:
            return None
            
        op = self.activeOperations[operationId]
        message = f"Service {op['service']}"
        
        workflow = self.services.workflow
        if not workflow:
            logger.warning(f"Cannot log progress: no workflow available")
            return None
        
        # parentId in ChatLog should be the operationId of the parent operation, not the log entry ID
        logData = {
            "workflowId": workflow.id,
            "message": message,
            "type": "info",
            "status": status,
            "progress": progress,
            "operationId": operationId,
            "parentId": parentOperationId  # Set to parent's operationId, not log entry ID
        }
        
        try:
            chatLog = self.services.chat.storeLog(workflow, logData)
            return chatLog.id if chatLog else None
        except Exception as e:
            logger.error(f"Failed to store progress log: {e}")
            return None
    
    def getOperationLogId(self, operationId: str) -> Optional[str]:
        """Get the log entry ID for an operation (the start log entry).
        
        Args:
            operationId: Unique identifier for the operation
            
        Returns:
            The log entry ID for the operation start, or None if not found
        """
        return self.operationLogIds.get(operationId)
    
    def getActiveOperations(self) -> Dict[str, Dict[str, Any]]:
        """Get all currently active operations.
        
        Returns:
            Dictionary of active operations
        """
        return self.activeOperations.copy()
    
    def clearAllOperations(self):
        """Clear all active operations (for cleanup)."""
        self.activeOperations.clear()
        self.finishedOperations.clear()
        logger.debug("Cleared all active operations")