import logging
import os

from slack_sdk import WebClient
from slack_sdk.errors import SlackApiError


def format_story(story: dict) -> list:
    title_text = (
        f"<{story['source_url']}|{story['title']}>"
        if story["source_url"]
        else story["title"]
    )
    return [
        {
            "type": "section",
            "text": {
                "type": "mrkdwn",
                "text": f"*{title_text}*",
            },
        },
        {
            "type": "context",
            "elements": [
                {
                    "type": "plain_text",
                    "text": f"Categories: {', '.join(story['categories'])}"
                    if story["categories"]
                    else "No categories",
                }
            ],
        },
        {
            "type": "section",
            "text": {
                "type": "mrkdwn",
                "text": story["summary"],
            },
        },
    ]


def format_slack_blocks(grouped_stories: dict[str, list[dict]]) -> list[dict]:
    """Format grouped stories into Slack block format."""
    blocks = []

    # Header block
    blocks.append(
        {"type": "header", "text": {"type": "plain_text", "text": "🚀 Tech Updates"}}
    )

    # Add stories for each group
    for group_name, stories in grouped_stories.items():
        # Group section header
        section_title = (
            "*Other Stories*" if group_name == "Other" else f"*{group_name}*"
        )
        blocks.append(
            {"type": "section", "text": {"type": "mrkdwn", "text": section_title}}
        )

        for story in stories:
            blocks.extend(format_story(story))

        # Add divider after each group (except the last one)
        blocks.append({"type": "divider"})

    return blocks


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

    try:
        response = client.chat_postMessage(
            channel=channel,
            text="Tech updates",
            blocks=blocks,
            unfurl_links=False,
            unfurl_media=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']}")