"""MCP resources implementation for ACB."""

from collections.abc import AsyncGenerator

import asyncio
from typing import TYPE_CHECKING, Any

from acb.depends import depends
from acb.logger import Logger

if TYPE_CHECKING:
    from acb.adapters.logger import LoggerProtocol

from .registry import ComponentRegistry


class ACBMCPResources:
    """MCP resources implementation for ACB."""

    def __init__(self, component_registry: ComponentRegistry) -> None:
        """Initialize the MCP resources."""
        self.component_registry = component_registry
        self.logger: LoggerProtocol = depends.get(Logger)  # type: ignore[assignment]
        self._initialized = False

    async def initialize(self) -> None:
        """Initialize the MCP resources."""
        if self._initialized:
            return

        self.logger.info("Initializing ACB MCP Resources")
        # Resource initialization logic would go here
        self._initialized = True
        self.logger.info("ACB MCP Resources initialized")

    async def get_component_registry(self) -> dict[str, Any]:
        """Get the component registry as a resource."""
        return {
            "actions": list(self.component_registry.get_actions().keys()),
            "adapters": list(self.component_registry.get_adapters().keys()),
            "services": list(self.component_registry.get_services().keys()),
            "events": list(self.component_registry.get_events().keys()),
        }

    async def get_system_metrics(self) -> dict[str, Any]:
        """Get system metrics as a resource."""
        # This is a placeholder implementation
        # In a real implementation, this would gather actual system metrics
        return {
            "timestamp": asyncio.get_event_loop().time(),
            "component_count": {
                "actions": len(self.component_registry.get_actions()),
                "adapters": len(self.component_registry.get_adapters()),
                "services": len(self.component_registry.get_services()),
                "events": len(self.component_registry.get_events()),
            },
        }

    async def get_event_stream(self) -> AsyncGenerator[dict[str, Any]]:
        """Get a stream of system events."""
        # This is a placeholder implementation
        # In a real implementation, this would stream actual system events
        try:
            counter = 0
            while True:
                yield {
                    "event_id": counter,
                    "timestamp": asyncio.get_event_loop().time(),
                    "type": "heartbeat",
                    "data": {"counter": counter},
                }
                counter += 1
                await asyncio.sleep(10)  # Send heartbeat every 10 seconds
        except asyncio.CancelledError:
            self.logger.info("Event stream cancelled")
            raise

    async def cleanup(self) -> None:
        """Clean up the MCP resources."""
        self._initialized = False
        self.logger.info("ACB MCP Resources cleaned up")
