#
# Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
# or more contributor license agreements. Licensed under the Elastic License 2.0;
# you may not use this file except in compliance with the Elastic License 2.0.
#
import asyncio
import json
import logging

from google.protobuf.json_format import MessageToDict

import elastic_agent_client.generated.elastic_agent_client_pb2 as proto
from elastic_agent_client.client import V2
from elastic_agent_client.handler.action import BaseActionHandler
from elastic_agent_client.util.async_tools import AsyncQueueIterator, BaseService
from elastic_agent_client.util.logger import logger


class ActionsService(BaseService):
    name = "actions"

    def __init__(self, client: V2, action_handler: BaseActionHandler):
        super().__init__(client, "actions")
        logger.debug(f"Initializing the {self.name} service")
        self.client = client
        self.action_handler = action_handler

    async def _run(self):
        logger.debug(f"Initializing the {self.name} service")
        if self.client.client is None:
            msg = "gRPC client is not yet set"
            raise RuntimeError(msg)
        send_queue: asyncio.Queue = asyncio.Queue()
        action_stream = self.client.client.Actions(AsyncQueueIterator(send_queue))
        logger.info("Sending startup action event")
        await send_queue.put(
            proto.ActionResponse(
                token=self.client.token,
                id="init",
                status=proto.ActionResponse.SUCCESS,
                result=self.init_action_result(),
            )
        )

        logger.info("Listening for action events")
        action: proto.ActionRequest
        async for action in action_stream:
            if logger.isEnabledFor(logging.DEBUG):
                action_str = MessageToDict(action)
                logger.debug(f"Received action event from actionV2: {action_str}")
            try:
                await self.action_handler.handle_action(action)
                logger.debug(f"Successfully handled action {action_str}")
            except Exception as e:
                logger.exception(f"Failed to do action: {action}", e)
                await send_queue.put(
                    proto.ActionResponse(
                        token=self.client.token,
                        id=action.id,
                        status=proto.ActionResponse.FAILED,
                        result=self.generic_action_failure(),
                    )
                )

    def init_action_result(self):
        return json.dumps({}).encode()

    def generic_action_failure(self):
        return json.dumps({"error": "Action failed"}).encode()