import os
import sys
import requests
from dotenv import load_dotenv

# ---------------------------
# ENV
# ---------------------------
load_dotenv()

ACCESS_TOKEN = os.getenv("VK_ACCESS_TOKEN")
GROUP_ID = int(os.getenv("VK_GROUP_ID", "0"))
API_VERSION = os.getenv("VK_API_VERSION", "5.199")
PHOTO_ATTACHMENT = os.getenv("VK_PHOTO_ATTACHMENT")

POST_TEXT = """Привет от Питона 🐍

Запись на услугу доступна по ссылке:

https://vk.com/uslugi-27937673

https://sekretydolgoletiya.ru
"""


# ---------------------------
# VALIDATION
# ---------------------------
def validate_env():
    missing = []

    if not ACCESS_TOKEN:
        missing.append("VK_GROUP_ACCESS_TOKEN")
    if not GROUP_ID:
        missing.append("VK_GROUP_ID")
    if not PHOTO_ATTACHMENT:
        missing.append("VK_PHOTO_ATTACHMENT")

    if missing:
        print(f"❌ Не заданы переменные окружения: {', '.join(missing)}")
        sys.exit(1)


# ---------------------------
# VK API
# ---------------------------
def vk_api(method: str, params: dict):
    response = requests.post(
        f"https://api.vk.com/method/{method}",
        data={
            **params,
            "access_token": ACCESS_TOKEN,
            "v": API_VERSION,
        },
        timeout=15,
    ).json()

    if "error" in response:
        error = response["error"]
        raise RuntimeError(f"VK API error {error['error_code']}: {error['error_msg']}")

    return response["response"]


# ---------------------------
# MAIN
# ---------------------------
def post_to_wall():
    vk_api(
        "wall.post",
        {
            "owner_id": GROUP_ID,
            "from_group": 1,
            "message": POST_TEXT.strip(),
            "attachments": PHOTO_ATTACHMENT,
        },
    )


if __name__ == "__main__":
    validate_env()
    post_to_wall()
    print("✅ Пост успешно опубликован")