import os

def getenv_bool(key: str, default: bool = False) -> bool:
    v = os.getenv(key)
    if v is None:
        return default
    return v.lower() in ("1", "true", "t", "yes", "y", "on")

def getenv_int(key: str, default: int) -> int:
    try:
        return int(os.getenv(key, str(default)))
    except ValueError:
        return default

def getenv_float(key: str, default: float) -> float:
    try:
        return float(os.getenv(key, str(default)))
    except ValueError:
        return default

# Podstawowe
FLASK_DEBUG = getenv_bool("FLASK_DEBUG", True)
SECRET_KEY = os.getenv("SECRET_KEY", "secretkey")

# Rozmiary/limity
MAX_CONTENT_LENGTH = getenv_int("MAX_CONTENT_LENGTH", 50 * 1024 * 1024)  # 50MB
RATE_LIMIT_DEFAULT  = os.getenv("RATE_LIMIT_DEFAULT", "100 per minute")
RATE_LIMIT_CONVERT  = os.getenv("RATE_LIMIT_CONVERT", "100 per minute")

# Redis
REDIS_URL  = os.getenv("REDIS_URL", "redis://localhost:6379/7")
REDIS_HOST = os.getenv("REDIS_HOST", "localhost")
REDIS_PORT = getenv_int("REDIS_PORT", 6379)
REDIS_DB   = getenv_int("REDIS_DB", 7)

# Basic Auth dla /stats
STATS_BASIC_AUTH_ENABLED = getenv_bool("STATS_BASIC_AUTH_ENABLED", True)
STATS_BASIC_AUTH_REALM   = os.getenv("STATS_BASIC_AUTH_REALM", "Stats")
STATS_BASIC_AUTH_USER = os.getenv("STATS_BASIC_AUTH_USER", "admin").strip()
STATS_BASIC_AUTH_PASS = os.getenv("STATS_BASIC_AUTH_PASS", "admin").strip()

# Cache/ETag dla Varnisha
CACHE_ENABLED       = getenv_bool("CACHE_ENABLED", True)
CACHE_S_MAXAGE      = getenv_int("CACHE_S_MAXAGE", 43200)  # 12h
CACHE_MAX_AGE       = getenv_int("CACHE_MAX_AGE", 3600)    # 1h
USE_REDIS_BODY_CACHE = getenv_bool("USE_REDIS_BODY_CACHE", False)

# AIOHTTP/stream
AIOHTTP_TOTAL_TIMEOUT       = getenv_float("AIOHTTP_TOTAL_TIMEOUT", 70.0)
AIOHTTP_CONNECT_TIMEOUT     = getenv_float("AIOHTTP_CONNECT_TIMEOUT", 10.0)
AIOHTTP_SOCK_CONNECT_TIMEOUT= getenv_float("AIOHTTP_SOCK_CONNECT_TIMEOUT", 10.0)
AIOHTTP_SOCK_READ_TIMEOUT   = getenv_float("AIOHTTP_SOCK_READ_TIMEOUT", 60.0)

READ_CHUNK       = getenv_int("READ_CHUNK", 64 * 1024)  # 64 KiB
STREAM_LINE_LIMIT= getenv_int("STREAM_LINE_LIMIT", 4096)

# Serwer
BIND_HOST = os.getenv("BIND_HOST", "127.0.0.1")
BIND_PORT = getenv_int("BIND_PORT", 8283)

# Domyślny URL źródłowy (opcjonalny)
DEFAULT_SOURCE_URL = os.getenv(
    "DEFAULT_SOURCE_URL",
    ""
)

# Debug trybu /convert
DEBUG_ENABLE     = getenv_bool("DEBUG_ENABLE", False)
DEBUG_KEY        = os.getenv("DEBUG_KEY", "")   # ustaw w env bezpieczny losowy sekret
DEBUG_RATE_LIMIT = os.getenv("DEBUG_RATE_LIMIT", "5 per minute")