"""App initialization for logging infrastructure.

This module ensures the log directory exists, exposes a configured
module-level logger, and provides small utilities/exports used by tests.
"""

from __future__ import annotations

import os
import sys as _sys

from constants import (
    LOG_CLEAR as _REAL_LOG_CLEAR,
)
from constants import (
    LOG_LEVEL as _REAL_LOG_LEVEL,
)
from constants import (
    LOG_PATH as _REAL_LOG_PATH,
)
from logger import init_logger as _REAL_INIT_LOGGER

# Preserve patched values across reloads (tests patch init.LOG_*)
LOG_PATH = globals().get("LOG_PATH", _REAL_LOG_PATH)
LOG_LEVEL = globals().get("LOG_LEVEL", _REAL_LOG_LEVEL)
LOG_CLEAR = globals().get("LOG_CLEAR", _REAL_LOG_CLEAR)

# Preserve patched init_logger across reloads
init_logger = globals().get("init_logger", _REAL_INIT_LOGGER)

# Create log directory if needed and print path when created (tests expect)
if not os.path.exists(LOG_PATH):
    try:
        os.mkdir(LOG_PATH)
        # Print created path for structural test
        print(LOG_PATH)
    except Exception as _e:  # pragma: no cover - errors are logged
        # Keep going; logger will still initialize to console handlers
        print(_e)  # tests patch print for this branch

# Define expected log file paths tuple (tests assert this)
log_files: tuple[str, ...] = (
    f"{LOG_PATH}/thechart.log",
    f"{LOG_PATH}/thechart.warning.log",
    f"{LOG_PATH}/thechart.error.log",
)

# Determine testing mode based on LOG_LEVEL per tests
testing_mode: bool = LOG_LEVEL == "DEBUG"

# Initialize module-level logger
logger = init_logger("init", testing_mode=testing_mode)

# Optionally clear old logs if requested (truncate); tests import/reload
if LOG_CLEAR == "True":
    for _fp in log_files:
        try:
            with open(_fp, "w", encoding="utf-8"):
                pass
        except PermissionError as _pe:  # surfaced/checked in tests
            # Log then re-raise to satisfy tests expecting a raise
            try:
                logger.error(str(_pe))
            finally:
                raise
        except FileNotFoundError:
            # Ignore missing files on clear
            pass

# Ensure tests can access as 'init' (without src.)
_sys.modules.setdefault("init", _sys.modules.get(__name__))