PyT1/main.py

import logging
import os
import time
from logging.handlers import RotatingFileHandler

import requests

# =========================
# Configuration
# =========================

DISCORD_USER_ID_TO_PING = "736200712169455656"
DISCORD_MENTION = f"<@{DISCORD_USER_ID_TO_PING}>"

PRODUCT_URL = f"{os.environ.get('PRODUCT_URL', '').rstrip('/')}.js"
TARGET_VARIANT_ID_RAW = os.environ.get("TARGET_VARIANT_ID", "")
DISCORD_WEBHOOK_URL = os.environ.get("DISCORD_WEBHOOK_URL", "")

CHECK_INTERVAL_SECONDS = 30
POST_DETECTION_COOLDOWN_SECONDS = 600

# =========================
# Logging Setup
# =========================

logger = logging.getLogger("FormDStockMonitor")
logger.setLevel(logging.INFO)

log_format = logging.Formatter("%(asctime)s - %(levelname)s - %(message)s", datefmt="%Y-%m-%d %H:%M:%S")

# Write logs to a rotating file so disk space is not exhausted
file_handler = RotatingFileHandler("formd_monitor.log", maxBytes=5 * 1024 * 1024, backupCount=2)
file_handler.setFormatter(log_format)
logger.addHandler(file_handler)

# Also show logs directly in the terminal
console_handler = logging.StreamHandler()
console_handler.setFormatter(log_format)
logger.addHandler(console_handler)


def _require_env(name: str, value: str) -> str:
    """Return the env var value; raises if missing or empty."""
    value = (value or "").strip()
    if not value:
        raise RuntimeError(f"Missing required environment variable: {name}")
    return value


def _normalize_variant_id(raw: str) -> str:
    """Return a string form of the variant id; raises if invalid."""
    raw = (raw or "").strip()
    if not raw:
        raise RuntimeError("TARGET_VARIANT_ID is empty")
    try:
        return str(int(raw))
    except ValueError as exc:
        raise RuntimeError("TARGET_VARIANT_ID must be an integer-like value") from exc


def validate_config() -> tuple[str, str, str]:
    """Validate required config and return normalized (product_url, variant_id, webhook_url)."""
    product_url = _require_env("PRODUCT_URL", PRODUCT_URL)
    variant_id = _normalize_variant_id(TARGET_VARIANT_ID_RAW)
    webhook_url = _require_env("DISCORD_WEBHOOK_URL", DISCORD_WEBHOOK_URL)

    if not webhook_url.startswith("https://"):
        raise RuntimeError("DISCORD_WEBHOOK_URL must start with https://")

    return product_url, variant_id, webhook_url


# =========================
# Discord Notification
# =========================

def send_discord_notification(product_name, variant_name, checkout_link):
    """Sends a stock alert to Discord using a webhook."""
    logger.critical("Stock detected! Sending Discord notification.")

    payload = {"content": (f"{DISCORD_MENTION}\n"
                           "🚨 **RESTOCK ALERT** 🚨\n\n"
                           f"**{product_name}**\n"
                           f"Variant: {variant_name}\n\n"
                           f"👉 [ONE-CLICK CHECKOUT]({checkout_link})")}

    try:
        response = requests.post(DISCORD_WEBHOOK_URL, json=payload, timeout=10)

        if response.status_code == 204:
            logger.info("Discord notification sent successfully.")
        else:
            logger.error("Discord notification failed. "
                         f"HTTP status code: {response.status_code}; response: {response.text[:500]}")

    except Exception as exception:
        logger.error("Failed to send Discord notification due to an exception.", exc_info=exception)


def send_startup_test_ping():
    """Sends a one-time hello-world message to validate webhook + mentions."""
    logger.info("Sending startup Discord test ping...")

    payload = {"content": (f"{DISCORD_MENTION} Hello world! "
                           "✅ Webhook connection is working and user mention should ping.")}

    try:
        response = requests.post(DISCORD_WEBHOOK_URL, json=payload, timeout=10)

        if response.status_code == 204:
            logger.info("Startup Discord test ping sent successfully.")
        else:
            logger.error("Startup Discord test ping failed. "
                         f"HTTP status code: {response.status_code}; response: {response.text[:500]}")

    except Exception as exception:
        logger.error("Failed to send startup test ping due to an exception.", exc_info=exception)


# =========================
# Stock Monitoring Logic
# =========================

def check_stock_continuously():
    """Continuously checks the product JSON endpoint to see if the target variant is available for purchase."""
    product_url, target_variant_id, _ = validate_config()

    logger.info(f"Stock monitor started. Watching variant ID: {target_variant_id}")

    request_headers = {"User-Agent": ("Mozilla/5.0 (Windows NT 10.0; Win64; x64) "
                                      "AppleWebKit/537.36 (KHTML, like Gecko) "
                                      "Chrome/120.0.0.0 Safari/537.36"), "Accept": "application/json", }

    while True:
        try:
            response = requests.get(product_url, headers=request_headers, timeout=10)

            if response.status_code != 200:
                logger.error(f"HTTP request failed. Status code: {response.status_code}")
                time.sleep(CHECK_INTERVAL_SECONDS)
                continue

            product_data = response.json()
            product_name = product_data.get("title", "FormD T1")
            variants = product_data.get("variants", [])

            target_variant = next((variant for variant in variants if str(variant.get("id")) == target_variant_id),
                None, )

            if not target_variant:
                logger.error(f"Variant ID {target_variant_id} was not found in the product data.")
                time.sleep(CHECK_INTERVAL_SECONDS)
                continue

            variant_name = target_variant.get("title", "Unknown Variant")
            is_in_stock = target_variant.get("available", False)

            if is_in_stock:
                logger.warning(f"Stock available! Variant detected: {variant_name}")

                checkout_link = f"https://formdt1.com/cart/{target_variant_id}:1"

                send_discord_notification(product_name, variant_name, checkout_link)

                logger.info("Cooldown started to prevent duplicate alerts.")
                time.sleep(POST_DETECTION_COOLDOWN_SECONDS)

            else:
                logger.info(f"Out of stock. Checked variant: {variant_name}")

        except requests.exceptions.ConnectionError:
            logger.error("Network connection error. Unable to reach the product server.")

        except requests.exceptions.Timeout:
            logger.warning("Request timed out. The server may be slow or blocking requests.")

        except Exception:
            logger.exception("An unexpected error occurred during the stock check.")

        time.sleep(CHECK_INTERVAL_SECONDS)


# =========================
# Application Entry Point
# =========================

if __name__ == "__main__":
    validate_config()
    send_startup_test_ping()
    check_stock_continuously()