"""Slack tool spec."""

import logging
from datetime import datetime
from ssl import SSLContext
from typing import List, Optional

from llama_index.readers.slack import SlackReader
from llama_index.schema import Document
from llama_index.tools.tool_spec.base import BaseToolSpec

logger = logging.getLogger(__name__)


class SlackToolSpec(BaseToolSpec):
    """Slack tool spec."""

    spec_functions = ["load_data", "send_message", "fetch_channels"]

    def __init__(
        self,
        slack_token: Optional[str] = None,
        ssl: Optional[SSLContext] = None,
        earliest_date: Optional[datetime] = None,
        latest_date: Optional[datetime] = None,
    ) -> None:
        """Initialize with parameters."""
        self.reader = SlackReader(
            slack_token=slack_token,
            ssl=ssl,
            earliest_date=earliest_date,
            latest_date=latest_date,
        )

    def load_data(
        self,
        channel_ids: List[str],
        reverse_chronological: bool = True,
    ) -> List[Document]:
        """Load data from the input directory."""
        return self.reader.load_data(
            channel_ids=channel_ids,
            reverse_chronological=reverse_chronological,
        )

    def send_message(
        self,
        channel_id: str,
        message: str,
    ) -> None:
        """Send a message to a channel given the channel ID."""
        slack_client = self.reader.client
        try:
            msg_result = slack_client.chat_postMessage(
                channel=channel_id,
                text=message,
            )
            logger.info(msg_result)
        except Exception as e:
            logger.error(e)
            raise

    def fetch_channels(
        self,
    ) -> List[str]:
        """Fetch a list of relevant channels."""
        slack_client = self.reader.client
        try:
            msg_result = slack_client.conversations_list()
            logger.info(msg_result)
        except Exception as e:
            logger.error(e)
            raise

        return msg_result["channels"]
