import os
from dotenv import load_dotenv

load_dotenv()

class Config:
    # 서버 설정
    SERVER_DOMAIN = os.getenv('SERVER_DOMAIN', 'localhost')
    SERVER_PROTOCOL = os.getenv('SERVER_PROTOCOL', 'http')
    WEBHOOK_SERVER_HOST = os.getenv('WEBHOOK_SERVER_HOST', '0.0.0.0')
    WEBHOOK_SERVER_PORT = int(os.getenv('WEBHOOK_SERVER_PORT', 5000))

    # 노션 API
    NOTION_API_SECRET = os.getenv('NOTION_API_SECRET')
    NOTION_API_BASE = "https://api.notion.com/v1"
    NOTION_VERSION = "2022-06-28"

    # 웹훅 서명 검증용 비밀키 (옵션)
    NOTION_WEBHOOK_SECRET = os.getenv('NOTION_WEBHOOK_SECRET', None)

    # Mattermost 관련
    MATTERMOST_SERVER_URL = os.getenv('MATTERMOST_SERVER_URL', '').rstrip('/')
    MATTERMOST_WEBHOOK_URL = os.getenv('MATTERMOST_WEBHOOK_URL')
    MATTERMOST_BOT_TOKEN = os.getenv('MATTERMOST_BOT_TOKEN')
    MATTERMOST_CH_ID = os.getenv('MATTERMOST_CH_ID')

    # 기타 설정
    DEBUG = os.getenv('DEBUG', 'false').lower() in ['true', '1', 'yes']
    LOG_LEVEL = os.getenv('LOG_LEVEL', 'INFO')

    @classmethod
    def mattermost_post_api_url(cls):
        if cls.MATTERMOST_SERVER_URL:
            return f"{cls.MATTERMOST_SERVER_URL}/api/v4/posts"
        return None

    @classmethod
    def validate(cls):
        missing = []

        # NOTION_API_SECRET 필수 확인
        if not cls.NOTION_API_SECRET:
            missing.append('NOTION_API_SECRET')

        # Mattermost는 둘 중 하나 이상 설정 필수
        if not cls.MATTERMOST_WEBHOOK_URL and not (cls.MATTERMOST_BOT_TOKEN and cls.MATTERMOST_CH_ID):
            if not cls.MATTERMOST_WEBHOOK_URL:
                missing.append('MATTERMOST_WEBHOOK_URL')
            if not cls.MATTERMOST_BOT_TOKEN:
                missing.append('MATTERMOST_BOT_TOKEN')
            if not cls.MATTERMOST_CH_ID:
                missing.append('MATTERMOST_CH_ID')

        if missing:
            err_msg = (
                f"환경변수 설정 오류: 아래 필수 항목이 누락되었습니다:\n"
                + "\n".join(f" - {var}" for var in missing)
                + "\n설정 후 다시 실행해주세요."
            )
            raise EnvironmentError(err_msg)
        else:
            print("필수 항목 검증 완료")

# 초기 검증 실행
Config.validate()