
"""
NeuralBridge Adapter for Slack Messaging

This adapter provides a mocked interface to the Slack Web API, allowing for
sending messages, listing channels, reading message histories, uploading files,
and adding reactions within the NeuralBridge ecosystem.

**Configuration (YAML):**

.. code-block:: yaml

    adapters:
      - name: my-slack-connector
        type: slack
        config:
          bot_token: "xoxb-your-mock-token"
          signing_secret: "your-mock-signing-secret"
          default_channel: "#general"
          app_token: "xapp-your-mock-app-token" # Optional, for certain functionalities

**Supported Operations:**

- ``send_message``: Posts a message to a specified channel.
- ``list_channels``: Retrieves a list of public channels.
- ``read_messages``: Fetches the message history of a channel.
- ``upload_file``: Uploads a file to a channel.
- ``add_reaction``: Adds a reaction to a message.

"""
from __future__ import annotations

import asyncio
import time
import uuid
from typing import Any

import structlog

from neuralbridge.adapters.base import AdapterResponse, BaseAdapter

logger = structlog.get_logger(__name__)


class SlackAdapter(BaseAdapter):
    """
    A mocked adapter for interacting with the Slack API.

    This class simulates the behavior of the Slack Web API for development and
    testing purposes within the NeuralBridge framework. It does not make any
    real network requests.
    """

    # --- Adapter Metadata ---
    adapter_type: str = "slack"
    category: str = "messaging"
    description: str = "Mock adapter for Slack messaging and collaboration."
    version: str = "1.0.0"
    supported_operations: list[str] = [
        "send_message",
        "list_channels",
        "read_messages",
        "upload_file",
        "add_reaction",
    ]

    def __init__(self, config: dict[str, Any] | None = None) -> None:
        """Initializes the Slack adapter instance."""
        super().__init__(config)
        # In a real adapter, a client object (e.g., from slack_sdk) would be initialized here.
        self._client = None
        logger.info("slack_adapter_initialized", config=self.config)

    # --- Abstract Method Implementations ---

    async def _do_connect(self) -> None:
        """
        Simulates establishing a connection to the Slack API.

        In a real-world scenario, this would involve initializing the Slack API
        client and potentially performing a health check, like `api_test`.
        """
        logger.info(
            "slack_connecting",
            bot_token_present=bool(self.config.get("bot_token"))
        )
        # MOCK: In production, this would initialize and test the connection.
        # from slack_sdk.web.async_client import AsyncWebClient
        # self._client = AsyncWebClient(token=self.config.get("bot_token"))
        # await self._client.api_test()
        await asyncio.sleep(0.05)  # Simulate network latency
        logger.info("slack_connection_mocked")

    async def _do_disconnect(self) -> None:
        """
        Simulates disconnecting from the Slack API.

        For the `slack_sdk`, there's often no explicit disconnect method, as it's
        based on HTTPS requests. This method is for resource cleanup if needed.
        """
        logger.info("slack_disconnecting")
        self._client = None
        await asyncio.sleep(0.02)  # Simulate cleanup
        logger.info("slack_disconnected_mocked")

    async def _do_validate_credentials(self) -> dict[str, Any]:
        """
        Simulates validation of the provided Slack API credentials.

        This would typically call the `auth.test` Slack API endpoint to verify
        the token and get information about the authenticated user/bot.
        """
        logger.info("validating_slack_credentials")
        bot_token = self.config.get("bot_token")
        if not bot_token or not bot_token.startswith("xoxb-"):
            raise ValueError("Invalid or missing `bot_token` in configuration.")

        # MOCK: In production, this would call the real `auth.test` API.
        await asyncio.sleep(0.1)  # Simulate API call latency

        mock_auth_response = {
            "ok": True,
            "url": "https://my-mock-workspace.slack.com/",
            "team": "Mock Workspace",
            "user": "mock-user",
            "team_id": "T12345678",
            "user_id": "U12345678",
            "bot_id": "B12345678",
        }
        logger.info("slack_credentials_validated_mocked")
        return mock_auth_response

    async def _do_execute(self, operation: str, params: dict[str, Any]) -> AdapterResponse:
        """
        Dispatches the requested operation to its corresponding mock implementation.

        Parameters
        ----------
        operation : str
            The name of the operation to execute.
        params : dict[str, Any]
            The parameters for the operation.

        Returns
        -------
        AdapterResponse
            The result of the operation.
        """
        logger.info("executing_slack_operation", operation=operation, params=params)

        if operation == "send_message":
            return await self._send_message(params)
        elif operation == "list_channels":
            return await self._list_channels(params)
        elif operation == "read_messages":
            return await self._read_messages(params)
        elif operation == "upload_file":
            return await self._upload_file(params)
        elif operation == "add_reaction":
            return await self._add_reaction(params)
        else:
            # This path should ideally not be reached due to the check in BaseAdapter
            raise ValueError(f"Unsupported operation: {operation}")

    def _get_config_schema(self) -> dict[str, Any]:
        """
        Returns the JSON Schema for the Slack adapter's configuration.

        This schema is used for validation and for generating UI forms in the
        NeuralBridge dashboard.
        """
        return {
            "type": "object",
            "properties": {
                "bot_token": {
                    "type": "string",
                    "title": "Bot User OAuth Token",
                    "description": "The token used to authenticate with the Slack API.",
                    "pattern": "^xoxb-.*$",
                },
                "signing_secret": {
                    "type": "string",
                    "title": "Signing Secret",
                    "description": "Used to verify that incoming requests are from Slack.",
                },
                "default_channel": {
                    "type": "string",
                    "title": "Default Channel",
                    "description": "The default channel to post messages to (e.g., #general).",
                    "pattern": "^[#C][A-Z0-9]+$",
                },
                "app_token": {
                    "type": "string",
                    "title": "App-Level Token",
                    "description": "Optional token for features like Socket Mode.",
                    "pattern": "^xapp-.*$",
                },
            },
            "required": ["bot_token", "signing_secret", "default_channel"],
        }

    # --- Mock Operation Implementations ---

    async def _send_message(self, params: dict[str, Any]) -> AdapterResponse:
        """Mocks sending a message to a Slack channel."""
        channel = params.get("channel") or self.config.get("default_channel")
        text = params.get("text")

        if not text:
            raise ValueError("The `text` parameter is required for `send_message`.")

        # MOCK: In production, this would call `chat.postMessage`.
        await asyncio.sleep(0.15)

        ts = time.time()
        mock_response_data = {
            "ok": True,
            "channel": channel,
            "ts": f"{ts:.6f}",
            "message": {
                "type": "message",
                "user": "U12345678", # Mock bot user ID
                "text": text,
                "ts": f"{ts:.6f}",
            },
        }
        return AdapterResponse(success=True, data=mock_response_data)

    async def _list_channels(self, params: dict[str, Any]) -> AdapterResponse:
        """Mocks listing public channels in a Slack workspace."""
        # MOCK: In production, this would call `conversations.list`.
        await asyncio.sleep(0.2)

        mock_response_data = {
            "ok": True,
            "channels": [
                {
                    "id": "C012AB3CD",
                    "name": "general",
                    "is_channel": True,
                    "num_members": 10,
                },
                {
                    "id": "C024BE91L",
                    "name": "random",
                    "is_channel": True,
                    "num_members": 25,
                },
                {
                    "id": "C032AB4FG",
                    "name": "dev-team",
                    "is_channel": True,
                    "num_members": 5,
                },
            ],
        }
        return AdapterResponse(success=True, data=mock_response_data)

    async def _read_messages(self, params: dict[str, Any]) -> AdapterResponse:
        """Mocks reading message history from a channel."""
        channel = params.get("channel")
        if not channel:
            raise ValueError("The `channel` parameter is required for `read_messages`.")

        # MOCK: In production, this would call `conversations.history`.
        await asyncio.sleep(0.25)

        ts = time.time()
        mock_response_data = {
            "ok": True,
            "messages": [
                {
                    "type": "message",
                    "user": "UABC123",
                    "text": "Hello, world!",
                    "ts": f"{ts - 3600:.6f}",
                },
                {
                    "type": "message",
                    "user": "UDEF456",
                    "text": "This is a mock message history.",
                    "ts": f"{ts - 1800:.6f}",
                },
            ],
            "has_more": False,
        }
        return AdapterResponse(success=True, data=mock_response_data)

    async def _upload_file(self, params: dict[str, Any]) -> AdapterResponse:
        """Mocks uploading a file to a Slack channel."""
        channel = params.get("channel") or self.config.get("default_channel")
        content = params.get("content")
        filename = params.get("filename", "file.txt")

        if not content:
            raise ValueError("The `content` parameter is required for `upload_file`.")

        # MOCK: In production, this would call `files.upload`.
        await asyncio.sleep(0.5)

        ts = time.time()
        mock_response_data = {
            "ok": True,
            "file": {
                "id": f"F{str(uuid.uuid4()).upper().replace('-','')[:9]}",
                "created": int(ts),
                "timestamp": int(ts),
                "name": filename,
                "title": filename,
                "mimetype": "text/plain",
                "filetype": "text",
                "pretty_type": "Plain Text",
                "user": "U12345678",
                "size": len(content),
                "mode": "hosted",
                "channels": [channel],
            },
        }
        return AdapterResponse(success=True, data=mock_response_data)

    async def _add_reaction(self, params: dict[str, Any]) -> AdapterResponse:
        """Mocks adding a reaction to a message."""
        channel = params.get("channel")
        timestamp = params.get("timestamp")
        name = params.get("name") # e.g., "thumbsup"

        if not all([channel, timestamp, name]):
            raise ValueError(
                "Parameters `channel`, `timestamp`, and `name` are required for `add_reaction`."
            )

        # MOCK: In production, this would call `reactions.add`.
        await asyncio.sleep(0.1)

        return AdapterResponse(success=True, data={"ok": True})

