"""Session-Buddy integration for Mahavishnu."""

from datetime import datetime
from typing import Any
import uuid

from ..core.config import MahavishnuSettings


class SessionBuddy:
    """Session management and checkpoint integration with Session-Buddy."""

    def __init__(self, config: MahavishnuSettings):
        """Initialize Session-Buddy with configuration.

        Args:
            config: MahavishnuSettings configuration object
        """
        self.config = config
        self.enabled = config.session.enabled
        self.checkpoint_interval = config.session.checkpoint_interval

    async def create_checkpoint(self, session_id: str, state: dict[str, Any]) -> str:
        """Create a checkpoint for the current session.

        Args:
            session_id: Unique identifier for the session
            state: Current state to checkpoint

        Returns:
            Checkpoint ID
        """
        if not self.enabled:
            return f"checkpoint_disabled_{session_id}"

        # In a real implementation, this would call Session-Buddy to create a checkpoint
        # For now, we'll simulate the functionality
        checkpoint_id = str(uuid.uuid4())

        # Simulate saving checkpoint data
        _checkpoint_data = {
            "checkpoint_id": checkpoint_id,
            "session_id": session_id,
            "created_at": datetime.now().isoformat(),
            "state": state,
            "status": "created",
        }

        # In a real implementation, this would store the checkpoint in Session-Buddy
        print(f"[Session-Buddy] Created checkpoint: {checkpoint_id} for session: {session_id}")

        return checkpoint_id

    async def update_checkpoint(
        self, checkpoint_id: str, status: str, result: dict[str, Any] = None
    ) -> bool:
        """Update an existing checkpoint with new status/result.

        Args:
            checkpoint_id: ID of the checkpoint to update
            status: New status ('running', 'completed', 'failed', etc.)
            result: Optional result data to store with checkpoint

        Returns:
            True if update was successful, False otherwise
        """
        if not self.enabled:
            return True

        # In a real implementation, this would call Session-Buddy to update a checkpoint
        # For now, we'll simulate the functionality
        _update_data = {
            "checkpoint_id": checkpoint_id,
            "updated_at": datetime.now().isoformat(),
            "status": status,
            "result": result,
        }

        # In a real implementation, this would update the checkpoint in Session-Buddy
        print(f"[Session-Buddy] Updated checkpoint: {checkpoint_id} with status: {status}")

        return True

    async def get_checkpoint(self, checkpoint_id: str) -> dict[str, Any] | None:
        """Retrieve checkpoint data.

        Args:
            checkpoint_id: ID of the checkpoint to retrieve

        Returns:
            Checkpoint data dictionary or None if not found
        """
        if not self.enabled:
            return None

        # In a real implementation, this would call Session-Buddy to retrieve a checkpoint
        # For now, we'll simulate the functionality
        print(f"[Session-Buddy] Retrieved checkpoint: {checkpoint_id}")

        # Return a simulated checkpoint
        return {
            "checkpoint_id": checkpoint_id,
            "session_id": f"session_for_{checkpoint_id}",
            "created_at": datetime.now().isoformat(),
            "updated_at": datetime.now().isoformat(),
            "status": "running",
            "state": {},
        }

    async def restore_from_checkpoint(self, checkpoint_id: str) -> dict[str, Any] | None:
        """Restore session state from a checkpoint.

        Args:
            checkpoint_id: ID of the checkpoint to restore from

        Returns:
            Restored state dictionary or None if not found
        """
        if not self.enabled:
            return None

        # In a real implementation, this would call Session-Buddy to restore from checkpoint
        # For now, we'll simulate the functionality
        checkpoint = await self.get_checkpoint(checkpoint_id)

        if checkpoint and checkpoint.get("status") in ("created", "running"):
            print(f"[Session-Buddy] Restored from checkpoint: {checkpoint_id}")
            return checkpoint.get("state")

        return None

    async def cleanup_checkpoint(self, checkpoint_id: str) -> bool:
        """Clean up a checkpoint after completion.

        Args:
            checkpoint_id: ID of the checkpoint to clean up

        Returns:
            True if cleanup was successful, False otherwise
        """
        if not self.enabled:
            return True

        # In a real implementation, this would call Session-Buddy to clean up a checkpoint
        # For now, we'll simulate the functionality
        print(f"[Session-Buddy] Cleaned up checkpoint: {checkpoint_id}")

        return True
