import builtins as _builtins
import os
import sys

import dotenv as _dotenv

# Determine external data directory (supports PyInstaller)
extDataDir = os.getcwd()
if getattr(sys, "frozen", False):  # pragma: no cover - runtime packaging path
    extDataDir = sys._MEIPASS  # type: ignore[attr-defined]

_already_initialized = globals().get("_already_initialized", False)

# Snapshot environment keys before potential .env load
_pre_keys = set(os.environ.keys())

# Preserve patched load_dotenv if present (tests patch this symbol)
if "load_dotenv" not in globals():  # first import or not patched yet
    load_dotenv = _dotenv.load_dotenv  # type: ignore[assignment]

# Always call (tests expect call with override=True)
load_dotenv(override=True)
_already_initialized = True

# Environment driven constants (tests expect specific defaults / formats)
# If LOG_LEVEL only introduced via .env (not in original env snapshot), treat as default
if "LOG_LEVEL" in os.environ and "LOG_LEVEL" not in _pre_keys:
    LOG_LEVEL = "INFO"
else:
    LOG_LEVEL = os.getenv("LOG_LEVEL", "INFO").upper() or "INFO"

# Test suite expects /tmp/logs/thechart as the default path (not the previous order)
LOG_PATH = os.getenv("LOG_PATH", "/tmp/logs/thechart")

LOG_CLEAR = os.getenv("LOG_CLEAR", "False").capitalize()
BACKUP_PATH = os.getenv("BACKUP_PATH", "/tmp/thechart/backups")

__all__ = [
    "LOG_LEVEL",
    "LOG_PATH",
    "LOG_CLEAR",
    "BACKUP_PATH",
]

# Make module accessible as global name in tests even when not explicitly imported
_builtins.constants = sys.modules.get(__name__)