import logging
import os

from langchain_core.documents import Document
from slack_sdk import WebClient
from slack_sdk.errors import SlackApiError


def prepare_message_blocks(stories: list[Document]) -> list:
    blocks = []
    for story in stories:
        block = [
            {
                "type": "header",
                "text": {"type": "plain_text", "text": story.metadata["title"]},
            },
            {
                "type": "context",
                "elements": [
                    {
                        "type": "plain_text",
                        "text": f"Categories: {', '.join(story.metadata.get('categories', []))}",
                    },
                ],
            },
            {
                "type": "context",
                "elements": [
                    {
                        "type": "plain_text",
                        "text": f"Posted on: {story.metadata['created_at']}",
                    }
                ],
            },
            {"type": "section", "text": {"type": "mrkdwn", "text": story.page_content}},
        ]

        blocks.append(block)
    return blocks


def send_message(channel: str, text: str) -> None:
    client = WebClient(token=os.environ["SLACK_BOT_TOKEN"])

    try:
        response = client.chat_postMessage(
            channel=channel,
            username="HN Ragandy",
            text=text,
            unfurl_links=False,
        )
        response.validate()
        logging.info(f"Message sent successfully to channel {channel}")
    except SlackApiError as e:
        logging.error(f"Error sending message: {e.response['error']}")