SPARC/SPARC/webhooks.py

"""Webhook notifications for job completion and alert events.

Sends JSON payloads to configured webhook URLs with retry logic.
Supports generic HTTP POST and Slack-compatible text payloads.
"""

import logging
import os
import time
from datetime import datetime
from typing import Any

import requests

logger = logging.getLogger(__name__)

# Comma-separated list of webhook URLs (env var based config)
_WEBHOOK_URLS_RAW = os.getenv("WEBHOOK_URLS", "")
WEBHOOK_URLS: list[str] = [
    url.strip() for url in _WEBHOOK_URLS_RAW.split(",") if url.strip()
]

MAX_RETRIES = 3
BACKOFF_BASE = 2  # seconds


def _is_slack_url(url: str) -> bool:
    """Check if a URL looks like a Slack incoming webhook."""
    return "hooks.slack.com" in url or "discord.com/api/webhooks" in url


def _build_payload(event_type: str, data: dict[str, Any], slack: bool = False) -> dict:
    """Build the webhook payload.

    Args:
        event_type: Type of event (e.g., "job_completed", "alert")
        data: Event-specific data
        slack: If True, wrap in Slack-compatible ``text`` format

    Returns:
        JSON-serializable payload dict
    """
    payload = {
        "event": event_type,
        "timestamp": datetime.utcnow().isoformat() + "Z",
        **data,
    }

    if slack:
        # Build a human-readable summary for Slack/Discord
        lines = [f"*[SPARC] {event_type}*"]
        for key, value in data.items():
            lines.append(f"  {key}: {value}")
        return {"text": "\n".join(lines)}

    return payload


def _send_with_retry(url: str, payload: dict) -> bool:
    """Send a POST request with exponential backoff retry.

    Args:
        url: Webhook URL
        payload: JSON payload to send

    Returns:
        True if delivered successfully, False after all retries exhausted
    """
    for attempt in range(1, MAX_RETRIES + 1):
        try:
            response = requests.post(url, json=payload, timeout=10)
            if response.status_code < 300:
                logger.debug("Webhook delivered to %s (attempt %d)", url, attempt)
                return True
            logger.warning(
                "Webhook %s returned %d (attempt %d/%d)",
                url, response.status_code, attempt, MAX_RETRIES,
            )
        except requests.RequestException as e:
            logger.warning(
                "Webhook delivery failed for %s (attempt %d/%d): %s",
                url, attempt, MAX_RETRIES, e,
            )

        if attempt < MAX_RETRIES:
            wait = BACKOFF_BASE ** attempt
            time.sleep(wait)

    logger.error("Webhook permanently failed for %s after %d attempts", url, MAX_RETRIES)
    return False


def notify(event_type: str, data: dict[str, Any]) -> None:
    """Fire all configured webhooks for an event.

    Safe to call even when no webhooks are configured (returns immediately).

    Args:
        event_type: Event identifier (e.g., "job_completed", "patent_alert")
        data: Event data to include in the payload
    """
    if not WEBHOOK_URLS:
        return

    for url in WEBHOOK_URLS:
        slack = _is_slack_url(url)
        payload = _build_payload(event_type, data, slack=slack)
        _send_with_retry(url, payload)


def notify_job_completed(
    job_id: str,
    status: str,
    total_companies: int,
    successful: int,
    failed: int,
) -> None:
    """Send notification when a batch job completes."""
    notify("job_completed", {
        "job_id": job_id,
        "status": status,
        "total_companies": total_companies,
        "successful": successful,
        "failed": failed,
        "summary": f"Batch job {job_id}: {successful}/{total_companies} succeeded",
    })


def notify_alert(
    company_name: str,
    alert_type: str,
    message: str,
) -> None:
    """Send notification for a tracked company alert."""
    notify("patent_alert", {
        "company_name": company_name,
        "alert_type": alert_type,
        "message": message,
    })