"""
Solace Agent Mesh Component class for the __GATEWAY_NAME_PASCAL_CASE__ Gateway.
"""

import logging
from typing import Any, Dict, List, Optional, Tuple, Union

from solace_agent_mesh.gateway.base.component import BaseGatewayComponent
from a2a.types import (
    TextPart,
    FilePart,  # If handling files
    DataPart,  # If handling structured data
    Task,
    TaskStatusUpdateEvent,
    TaskArtifactUpdateEvent,
    JSONRPCError,
)
from ...common import a2a
from ...common.a2a import ContentPart

log = logging.getLogger(__name__)

info = {
    "class_name": "__GATEWAY_NAME_PASCAL_CASE__GatewayComponent",
    "description": (
        "Implements the A2A __GATEWAY_NAME_PASCAL_CASE__ Gateway, inheriting from BaseGatewayComponent. "
        "Handles communication between the __GATEWAY_NAME_SNAKE_CASE__ system and the A2A agent ecosystem."
    ),
    "config_parameters": [],  # Defined by __GATEWAY_NAME_PASCAL_CASE__GatewayApp
    # Not needed for gateway components
    "input_schema": {},
    "output_schema": {},
}


class __GATEWAY_NAME_PASCAL_CASE__GatewayComponent(BaseGatewayComponent):
    """
    Solace Agent Mesh Component implementing the A2A __GATEWAY_NAME_PASCAL_CASE__ Gateway.
    """

    def __init__(self, **kwargs: Any):
        super().__init__(**kwargs)
        log.info(
            "%s Initializing __GATEWAY_NAME_PASCAL_CASE__ Gateway Component (Post-Base)...",
            self.log_identifier,
        )

        # --- Retrieve Gateway-Specific Configurations ---
        # Example: self.api_endpoint_url = self.get_config("api_endpoint_url")
        # Example: self.connection_timeout = self.get_config("connection_timeout_seconds")
        # Example: self.processing_rules = self.get_config("processing_rules")

        # --- Initialize External System Client/SDK ---
        # Example: self.external_client = SomeApiClient(api_key=self.service_api_key, endpoint=self.api_endpoint_url)
        # Ensure any client initialization is robust and handles potential errors.

        log.info(
            "%s __GATEWAY_NAME_PASCAL_CASE__ Gateway Component initialization complete.",
            self.log_identifier,
        )

    def _start_listener(self) -> None:
        """
        GDK Hook: Start listening for events/requests from the external __GATEWAY_NAME_SNAKE_CASE__ system.
        This method is called by BaseGatewayComponent.run() within self.async_loop.
        - For polling: Start a polling loop (e.g., in a new thread or asyncio task).
        - For webhooks: If embedding a server (like FastAPI in WebhookGateway), start it here.
        - For SDKs with callbacks: Register your callbacks here.
        """
        log_id_prefix = f"{self.log_identifier}[StartListener]"
        log.info(
            "%s Starting listener for __GATEWAY_NAME_SNAKE_CASE__ system...",
            log_id_prefix,
        )

        # Example for a polling mechanism (adapt as needed):
        # if self.async_loop and self.async_loop.is_running():
        #     self.async_loop.create_task(self._poll_external_system())
        # else:
        #     log.error("%s Async loop not available or not running. Cannot start polling.", log_id_prefix)
        #     self.stop_signal.set() # Signal component to stop if listener cannot start

        # If your external system uses an SDK that runs its own event loop or requires
        # a blocking call to start, manage that appropriately (e.g., in a separate thread
        # that communicates back to the async_loop via asyncio.run_coroutine_threadsafe).

        log.info(
            "%s __GATEWAY_NAME_SNAKE_CASE__ listener startup initiated.", log_id_prefix
        )

    # async def _poll_external_system(self): # Example polling loop
    #     log_id_prefix = f"{self.log_identifier}[PollLoop]"
    #     log.info("%s Starting __GATEWAY_NAME_SNAKE_CASE__ polling loop...", log_id_prefix)
    #     while not self.stop_signal.is_set():
    #         try:
    #             # new_events = await self.external_client.get_new_events() # Or sync equivalent
    #             # for event_data in new_events:
    #             #     # 1. Authenticate the user and enrich their profile.
    #             #     user_identity = await self.authenticate_and_enrich_user(event_data)
    #             #     if not user_identity:
    #             #         log.warning("%s Authentication failed for event, skipping.", log_id_prefix)
    #             #         continue
    #             #
    #             #     # 2. Translate the external event into an A2A task.
    #             #     try:
    #             #         target_agent, parts, context = await self._translate_external_input(event_data)
    #             #     except ValueError as e:
    #             #         log.error("%s Translation failed for event: %s", log_id_prefix, e)
    #             #         # Optionally, send an error back to the user in the external system here.
    #             #         continue
    #             #
    #             #     # 3. Submit the A2A task.
    #             #     if target_agent and parts:
    #             #         await self.submit_a2a_task(
    #             #             target_agent_name=target_agent,
    #             #             a2a_parts=parts,
    #             #             external_request_context=context,
    #             #             user_identity=user_identity,
    #             #             is_streaming=True # Or False, depending on gateway needs
    #             #         )
    #             #
    #             # await asyncio.sleep(self.get_config("polling_interval_seconds", 60))
    #             pass # Placeholder
    #         except asyncio.CancelledError:
    #             log.info("%s Polling loop cancelled.", log_id_prefix)
    #             break
    #         except Exception as e:
    #             log.exception("%s Error in polling loop: %s", log_id_prefix, e)
    #             await asyncio.sleep(60) # Wait before retrying on error
    #     log.info("%s __GATEWAY_NAME_SNAKE_CASE__ polling loop stopped.", log_id_prefix)

    def _stop_listener(self) -> None:
        """
        GDK Hook: Stop listening for events/requests and clean up resources.
        This method is called by BaseGatewayComponent.cleanup().
        - For polling: Signal the polling loop to stop.
        - For webhooks: Gracefully shut down the embedded server.
        - For SDKs: Unregister callbacks, close connections.
        """
        log_id_prefix = f"{self.log_identifier}[StopListener]"
        log.info(
            "%s Stopping listener for __GATEWAY_NAME_SNAKE_CASE__ system...",
            log_id_prefix,
        )

        # self.stop_signal is already set by BaseGatewayComponent before calling this.
        # Ensure your _start_listener logic (e.g., polling loop) respects self.stop_signal.

        # Example: If you started a thread for a blocking SDK client:
        # if hasattr(self, "sdk_thread") and self.sdk_thread.is_alive():
        #     # Signal SDK to shutdown if possible, then join thread
        #     # self.external_client.shutdown()
        #     self.sdk_thread.join(timeout=10)

        # Example: If an asyncio task was created for polling:
        # if hasattr(self, "polling_task") and not self.polling_task.done():
        #     self.polling_task.cancel()
        #     # Optionally await it if _stop_listener can be async, or manage in cleanup

        log.info(
            "%s __GATEWAY_NAME_SNAKE_CASE__ listener shutdown initiated.", log_id_prefix
        )

    async def _extract_initial_claims(
        self, external_event_data: Any
    ) -> Optional[Dict[str, Any]]:
        """
        GDK Hook: Extracts the primary identity claims from a platform-specific event.
        This method MUST be implemented by derived gateway components.

        The base class's `authenticate_and_enrich_user` method will call this,
        and then (if configured) pass the result to an Identity Service for enrichment.

        Args:
            external_event_data: Raw event data from the external platform
                                 (e.g., FastAPIRequest, Slack event dictionary).

        Returns:
            A dictionary of initial claims, which MUST include an 'id' key.
            Example: {"id": "user@example.com", "source": "api_key"}
            Return None if authentication fails.
        """
        log_id_prefix = f"{self.log_identifier}[ExtractClaims]"
        # log.debug("%s Extracting initial claims from external event: %s", log_id_prefix, external_event_data)

        # --- Implement Claims Extraction Logic Here ---
        # Example: Check an API key from headers or payload
        # provided_key = external_event_data.get("headers", {}).get("X-API-Key")
        # if provided_key and provided_key == self.get_config("service_api_key"):
        #     user_id = external_event_data.get("user_id_field", "default_system_user")
        #     log.info("%s Authentication successful for user: %s", log_id_prefix, user_id)
        #     return {"id": user_id, "source": "api_key"}
        # else:
        #     log.warning("%s Authentication failed: API key mismatch or missing.", log_id_prefix)
        #     return None

        # If no authentication is needed for this gateway, you can use a default identity
        # from the configuration. The base class handles this logic if `force_user_identity`
        # or `default_user_identity` are set, but you can implement it here if needed.
        # return {"id": "anonymous___GATEWAY_NAME_SNAKE_CASE___user", "source": "anonymous"}

        log.warning("%s _extract_initial_claims not fully implemented.", log_id_prefix)
        return {
            "id": "placeholder_user_identity",
            "source": "placeholder",
        }  # Replace with actual logic

    async def _translate_external_input(
        self, external_event_data: Any
    ) -> Tuple[str, List[ContentPart], Dict[str, Any]]:
        """
        GDK Hook: Translates the incoming external event/request into A2A task parameters.
        This method is called *after* `authenticate_and_enrich_user`. The gateway's
        event processing logic (e.g., a polling loop or request handler) is responsible
        for calling `authenticate_and_enrich_user` first, and then passing the raw
        event data to this method.

        Args:
            external_event_data: The raw data from the external system.

        Returns:
            A tuple:
            - `target_agent_name` (str): Name of the A2A agent to route the task to.
            - `a2a_parts` (List[ContentPart]): List of A2A Parts for the task.
            - `external_request_context` (Dict[str, Any]): Dictionary to store any context
              needed later (e.g., for _send_final_response_to_external).

        Raises:
            ValueError: If translation fails (e.g., target agent cannot be determined).
        """
        log_id_prefix = f"{self.log_identifier}[TranslateInput]"
        # log.debug("%s Translating external event: %s", log_id_prefix, external_event_data)

        a2a_parts: List[ContentPart] = []
        target_agent_name: Optional[str] = (
            None  # Determine this based on event data or config
        )
        # This context is stored and passed back to the `_send_*_to_external` methods.
        # It should contain any information needed to route the response back to the
        # original requester in the external system.
        external_request_context: Dict[str, Any] = {
            "a2a_session_id": f"__GATEWAY_NAME_SNAKE_CASE__-session-{self.generate_uuid()}",  # Example session ID
            # "original_request_id": external_event_data.get("id"),
        }

        # --- Implement Translation Logic Here ---
        # 1. Determine Target Agent:
        #    - Statically from config: target_agent_name = self.get_config("default_target_agent")
        #    - Dynamically from event_data: target_agent_name = external_event_data.get("target_agent_field")
        #    - Based on processing_rules:
        #      for rule in self.processing_rules:
        #          if rule.matches(external_event_data):
        #              target_agent_name = rule.get_agent_name()
        #              break
        target_agent_name = "OrchestratorAgent"  # Placeholder

        # 2. Construct A2A Parts:
        #    - Extract text:
        #      text_content = external_event_data.get("message_text", "")
        #      if text_content:
        #          a2a_parts.append(a2a.create_text_part(text=text_content))
        #    - Handle files (if any): Download, save to artifact service, create FilePart with URI.
        #      (Requires self.shared_artifact_service to be configured and available).
        #      The `user_identity` dict is available in the calling context (e.g., polling loop).
        #      # if "file_url" in external_event_data and self.shared_artifact_service:
        #      #     file_bytes = await download_file(external_event_data["file_url"])
        #      #     file_name = external_event_data.get("file_name", "attachment.dat")
        #      #     mime_type = external_event_data.get("mime_type", "application/octet-stream")
        #      #     artifact_uri = await self.save_to_artifact_service(
        #      #         file_bytes, file_name, mime_type,
        #      #         user_identity, external_request_context["a2a_session_id"]
        #      #     )
        #      #     if artifact_uri:
        #      #         a2a_parts.append(a2a.create_file_part_from_uri(uri=artifact_uri, name=file_name, mime_type=mime_type))
        #    - Handle structured data:
        #      # structured_data = external_event_data.get("data_payload")
        #      # if structured_data:
        #      #    a2a_parts.append(a2a.create_data_part(data=structured_data, metadata={"source": "__GATEWAY_NAME_SNAKE_CASE__"}))

        # Example: Simple text passthrough
        raw_text = str(
            external_event_data.get(
                "text_input_field", "Default text from __GATEWAY_NAME_SNAKE_CASE__"
            )
        )
        a2a_parts.append(a2a.create_text_part(text=raw_text))

        if not target_agent_name:
            log.error("%s Could not determine target_agent_name.", log_id_prefix)
            raise ValueError("Could not determine target agent for the request.")

        if not a2a_parts:
            log.warning(
                "%s No A2A parts created from external event. Task might be empty.",
                log_id_prefix,
            )
            # Depending on requirements, you might want to raise ValueError here too.

        log.info(
            "%s Translation complete. Target: %s, Parts: %d",
            log_id_prefix,
            target_agent_name,
            len(a2a_parts),
        )
        return target_agent_name, a2a_parts, external_request_context

    async def _send_final_response_to_external(
        self, external_request_context: Dict[str, Any], task_data: Task
    ) -> None:
        """
        GDK Hook: Sends the final A2A Task result back to the external __GATEWAY_NAME_SNAKE_CASE__ system.
        - `external_request_context`: The context dictionary returned by _translate_external_input.
        - `task_data`: The final A2A Task object (contains status, results, etc.).
        """
        log_id_prefix = f"{self.log_identifier}[SendFinalResponse]"
        task_id = a2a.get_task_id(task_data)
        # log.debug("%s Sending final response for task %s. Context: %s", log_id_prefix, task_id, external_request_context)

        # --- Implement Logic to Send Response to External System ---
        # 1. Extract relevant information from task_data using the `a2a` facade:
        #    from a2a.types import TaskState
        #    task_status = a2a.get_task_status(task_data) # e.g., TaskState.completed
        #    artifacts = a2a.get_task_artifacts(task_data)
        #    response_text = a2a.get_text_from_message(task_data.status.message) if task_data.status and task_data.status.message else ""

        # 2. Format the response according to the external system's requirements.
        #    if task_status == TaskState.failed:
        #        final_message = f"Task failed: {response_text}"
        #    elif task_status == TaskState.canceled:
        #        final_message = "Task was canceled."
        #    else:
        #        final_message = response_text

        # 3. Use information from external_request_context to send the response
        #    (e.g., reply-to address, original request ID).
        #    # original_request_id = external_request_context.get("original_request_id")
        #    # await self.external_client.send_reply(original_request_id, final_message)

        log.warning(
            "%s _send_final_response_to_external not fully implemented for task %s.",
            log_id_prefix,
            task_id,
        )

    async def _send_error_to_external(
        self, external_request_context: Dict[str, Any], error_data: JSONRPCError
    ) -> None:
        """
        GDK Hook: Sends an A2A error back to the external __GATEWAY_NAME_SNAKE_CASE__ system.
        This is called if an error occurs within the A2A GDK processing (e.g., task submission failure,
        authorization failure after initial authentication).
        - `external_request_context`: Context from _translate_external_input.
        - `error_data`: A JSONRPCError object.
        """
        log_id_prefix = f"{self.log_identifier}[SendError]"
        error_message = a2a.get_error_message(error_data)
        error_code = a2a.get_error_code(error_data)
        # log.warning("%s Sending error to external system. Error: %s. Context: %s", log_id_prefix, error_message, external_request_context)

        # --- Implement Logic to Send Error to External System ---
        # error_message_to_send = f"A2A Error: {error_message} (Code: {error_code})"
        # # original_request_id = external_request_context.get("original_request_id")
        # # await self.external_client.send_error_reply(original_request_id, error_message_to_send)

        log.warning(
            "%s _send_error_to_external not fully implemented. Error: %s",
            log_id_prefix,
            error_message,
        )

    async def _send_update_to_external(
        self,
        external_request_context: Dict[str, Any],
        event_data: Union[TaskStatusUpdateEvent, TaskArtifactUpdateEvent],
        is_final_chunk_of_update: bool,
    ) -> None:
        """
        GDK Hook: Sends intermediate A2A task updates (status or artifacts) to the external system.
        - This is optional. If your gateway doesn't support streaming intermediate updates,
        - you can leave this method as a no-op (just log).
        - `is_final_chunk_of_update`: True if this is the last part of a streamed TextPart from TaskStatusUpdateEvent.
        """
        log_id_prefix = f"{self.log_identifier}[SendUpdate]"
        task_id = event_data.task_id
        # log.debug("%s Received A2A update for task %s. Type: %s. FinalChunk: %s",
        #           log_id_prefix, task_id, type(event_data).__name__, is_final_chunk_of_update)

        # --- Implement Logic to Send Intermediate Update (if supported) ---
        # if isinstance(event_data, TaskStatusUpdateEvent):
        #     message = a2a.get_message_from_status_update(event_data)
        #     if message:
        #         # Get text content
        #         text_content = a2a.get_text_from_message(message)
        #         if text_content:
        #             # Send text_content to external system
        #             pass
        #
        #         # Check for specific status signals (DataParts)
        #         data_parts = a2a.get_data_parts_from_message(message)
        #         for part in data_parts:
        #             data = a2a.get_data_from_data_part(part)
        #             if data.get("type") == "agent_progress_update":
        #                 status_text = data.get("status_text")
        #                 # Send status_text to external system
        #                 pass
        #
        # elif isinstance(event_data, TaskArtifactUpdateEvent):
        #     artifact = a2a.get_artifact_from_artifact_update(event_data)
        #     if artifact:
        #         # Handle artifact updates (e.g., notify external system of new artifact URI)
        #         pass

        # Default: Log that this gateway does not handle intermediate updates.
        log.debug(
            "%s __GATEWAY_NAME_PASCAL_CASE__ Gateway does not process intermediate updates. Update for task %s ignored.",
            log_id_prefix,
            task_id,
        )
        pass  # No-op by default

    # --- Optional: Helper methods for your gateway ---
    def generate_uuid(self) -> str:  # Made this a method of the class
        import uuid

        return str(uuid.uuid4())

    # async def save_to_artifact_service(self, content_bytes: bytes, filename: str, mime_type: str, user_identity: Dict[str, Any], session_id: str) -> Optional[str]:
    #     """Helper to save content to the shared artifact service."""
    #     if not self.shared_artifact_service:
    #         log.error("%s Artifact service not available. Cannot save file: %s", self.log_identifier, filename)
    #         return None
    #     try:
    #         from ...agent.utils.artifact_helpers import save_artifact_with_metadata # Adjust import
    #         from datetime import datetime, timezone

    #         user_id = user_identity.get("id")
    #         if not user_id:
    #             log.error("%s Cannot save artifact, user_id not found in user_identity.", self.log_identifier)
    #             return None

    #         save_result = await save_artifact_with_metadata(
    #             artifact_service=self.shared_artifact_service,
    #             app_name=self.gateway_id, # from BaseGatewayComponent
    #             user_id=user_id,
    #             session_id=session_id,
    #             filename=filename,
    #             content_bytes=content_bytes,
    #             mime_type=mime_type,
    #             metadata_dict={
    #                 "source": "__GATEWAY_NAME_SNAKE_CASE___upload",
    #                 "original_filename": filename,
    #                 "upload_timestamp_utc": datetime.now(timezone.utc).isoformat(),
    #             },
    #             timestamp=datetime.now(timezone.utc)
    #         )
    #         if save_result["status"] in ["success", "partial_success"]:
    #             data_version = save_result.get("data_version", 0)
    #             artifact_uri = f"artifact://{self.gateway_id}/{user_id}/{session_id}/{filename}?version={data_version}"
    #             log.info("%s Saved artifact: %s", self.log_identifier, artifact_uri)
    #             return artifact_uri
    #         else:
    #             log.error("%s Failed to save artifact %s: %s", self.log_identifier, filename, save_result.get("message"))
    #             return None
    #     except Exception as e:
    #         log.exception("%s Error saving artifact %s: %s", self.log_identifier, filename, e)
    #         return None

    def cleanup(self):
        """
        GDK Hook: Called before the component is fully stopped.
        Perform any final cleanup specific to this component beyond _stop_listener.
        """
        log.info(
            "%s Cleaning up __GATEWAY_NAME_PASCAL_CASE__ Gateway Component (Pre-Base)...",
            self.log_identifier,
        )
        # Example: Close any persistent connections not handled in _stop_listener
        # if hasattr(self, "persistent_connection") and self.persistent_connection.is_open():
        #     self.persistent_connection.close()
        super().cleanup()  # Important to call super().cleanup()
        log.info(
            "%s __GATEWAY_NAME_PASCAL_CASE__ Gateway Component cleanup finished.",
            self.log_identifier,
        )
