import os
from dotenv import load_dotenv

load_dotenv()


class Config:
    REDMINE_URL = os.getenv("REDMINE_URL", "").strip().rstrip("/")
    REDMINE_API_KEY = os.getenv("REDMINE_API_KEY")
    REDMINE_USER = os.getenv("REDMINE_USER")
    REDMINE_PASSWORD = os.getenv("REDMINE_PASSWORD")
    REDMINE_AUTHOR = os.getenv("REDMINE_AUTHOR")
    DEFAULT_FROM_DATE = os.getenv("DEFAULT_FROM_DATE")
    DEFAULT_TO_DATE = os.getenv("DEFAULT_TO_DATE")

    @classmethod
    def get_author(cls, cli_author: str = "") -> str:
        """Возвращает автора: из CLI если задан, иначе из .env, иначе — заглушку."""
        if cli_author:
            return cli_author
        if cls.REDMINE_AUTHOR:
            return cls.REDMINE_AUTHOR
        return ""

    @classmethod
    def get_default_date_range(cls) -> str:
        if cls.DEFAULT_FROM_DATE and cls.DEFAULT_TO_DATE:
            return f"{cls.DEFAULT_FROM_DATE}--{cls.DEFAULT_TO_DATE}"
        # fallback hardcoded
        return "2025-12-19--2026-01-31"

    @classmethod
    def validate(cls) -> None:
        if not cls.REDMINE_URL:
            raise ValueError("REDMINE_URL is required (set via env or .env)")
        if cls.REDMINE_API_KEY:
            return
        if not (cls.REDMINE_USER and cls.REDMINE_PASSWORD):
            raise ValueError(
                "REDMINE_API_KEY is required, or set both REDMINE_USER and REDMINE_PASSWORD"
            )