"""
NFOGuard Configuration Module
Handles all configuration loading and validation
"""
import os
from pathlib import Path
from typing import List


def _bool_env(name: str, default: bool) -> bool:
    """Convert environment variable to boolean"""
    v = os.environ.get(name)
    if v is None:
        return default
    return v.lower() in ("1", "true", "yes", "y", "on")


class NFOGuardConfig:
    """Configuration class for NFOGuard"""
    
    def __init__(self):
        # Paths - No hardcoded defaults, must be configured via environment
        tv_paths_env = os.environ.get("TV_PATHS", "")
        movie_paths_env = os.environ.get("MOVIE_PATHS", "")
        
        if not tv_paths_env:
            raise ValueError("TV_PATHS environment variable is required but not set")
        if not movie_paths_env:
            raise ValueError("MOVIE_PATHS environment variable is required but not set")
            
        self.tv_paths = [Path(p.strip()) for p in tv_paths_env.split(",") if p.strip()]
        self.movie_paths = [Path(p.strip()) for p in movie_paths_env.split(",") if p.strip()]
        
        # Core settings
        self.manage_nfo = _bool_env("MANAGE_NFO", True)
        self.fix_dir_mtimes = _bool_env("FIX_DIR_MTIMES", True)
        self.lock_metadata = _bool_env("LOCK_METADATA", True)
        self.debug = _bool_env("DEBUG", False)
        self.manager_brand = os.environ.get("MANAGER_BRAND", "NFOGuard")
        
        # Batching
        self.batch_delay = float(os.environ.get("BATCH_DELAY", "5.0"))
        self.max_concurrent = int(os.environ.get("MAX_CONCURRENT_SERIES", "3"))
        
        # Database
        self.db_path = Path(os.environ.get("DB_PATH", "/app/data/media_dates.db"))
        
        # Movie processing
        self.movie_priority = os.environ.get("MOVIE_PRIORITY", "import_then_digital").lower()
        self.prefer_release_dates_over_file_dates = _bool_env("PREFER_RELEASE_DATES_OVER_FILE_DATES", True)
        self.allow_file_date_fallback = _bool_env("ALLOW_FILE_DATE_FALLBACK", False)
        self.release_date_priority = [p.strip() for p in os.environ.get("RELEASE_DATE_PRIORITY", "digital,physical,theatrical").split(",")]
        self.enable_smart_date_validation = _bool_env("ENABLE_SMART_DATE_VALIDATION", True)
        self.max_release_date_gap_years = int(os.environ.get("MAX_RELEASE_DATE_GAP_YEARS", "10"))
        self.movie_poll_mode = os.environ.get("MOVIE_POLL_MODE", "always").lower()
        self.movie_update_mode = os.environ.get("MOVIE_DATE_UPDATE_MODE", "backfill_only").lower()
        
        # TV processing
        self.tv_season_dir_format = os.environ.get("TV_SEASON_DIR_FORMAT", "Season {season:02d}")
        self.tv_season_dir_pattern = os.environ.get("TV_SEASON_DIR_PATTERN", "season ").lower()
        self.tv_webhook_processing_mode = os.environ.get("TV_WEBHOOK_PROCESSING_MODE", "targeted").lower()


# Global config instance
config = NFOGuardConfig()