"""
This module provides context managers for temporarily silencing output.

- Muffle: Context manager that temporarily silences output (alternative to stouputils.decorators.silent())
- LogToFile: Context manager to log to a file every calls to the print functions in stouputils.print
"""

# Imports
import os
import sys
from typing import IO, TextIO, Callable, Any

# Context manager to temporarily silence output
class Muffle:
	""" Context manager that temporarily silences output.

	Alternative to stouputils.decorators.silent()
	
	Examples:
		>>> with Muffle():
		...     print("This will not be printed")
	"""
	def __init__(self, mute_stderr: bool = False) -> None:
		self.mute_stderr: bool = mute_stderr

	def __enter__(self) -> None:
		self.original_stdout: TextIO = sys.stdout
		sys.stdout = open(os.devnull, 'w')
		if self.mute_stderr:
			self.original_stderr: TextIO = sys.stderr
			sys.stderr = open(os.devnull, 'w')

	def __exit__(self, exc_type: type[BaseException]|None, exc_val: BaseException|None, exc_tb: Any|None) -> None:
		sys.stdout.close()
		sys.stdout = self.original_stdout
		if self.mute_stderr:
			sys.stderr.close()
			sys.stderr = self.original_stderr


# Context manager to log to a file
from .print import logging_to
from .io import super_open
class LogToFile:
	""" Context manager to log to a file.

	This context manager allows you to temporarily log output to a file while still printing normally.
	The file will receive log messages without ANSI color codes.

	Args:
		path (str): Path to the log file
		mode (str): Mode to open the file in (default: "w")
		encoding (str): Encoding to use for the file (default: "utf-8")

	Examples:
		>>> with LogToFile("output.log"):
		...     from stouputils.print import info
		...     info("This will be logged to output.log and printed normally")
	"""
	def __init__(self, path: str, mode: str = "w", encoding: str = "utf-8") -> None:
		self.path: str = path
		self.mode: str = mode
		self.encoding: str = encoding

	def __enter__(self) -> None:
		self.file: IO[Any] = super_open(self.path, mode=self.mode, encoding=self.encoding)
		logging_to.add(self.file)

	def __exit__(self, exc_type: type[BaseException]|None, exc_val: BaseException|None, exc_tb: Any|None) -> None:
		self.file.close()
		logging_to.discard(self.file)
	
	@staticmethod
	def common(logs_folder: str, filepath: str, func: Callable[..., Any], *args: Any, **kwargs: Any) -> Any:
		""" Common code used at the beginning of a program to launch main function

		Args:
			logs_folder (str): Folder to store logs in
			filepath    (str): Path to the main function
			func        (Callable[..., Any]): Main function to launch
			*args       (tuple[Any, ...]): Arguments to pass to the main function
			**kwargs    (dict[str, Any]): Keyword arguments to pass to the main function
		Returns:
			Any: Return value of the main function
		
		Examples:
			>>> if __name__ == "__main__":
			...     LogToFile.common(f"{ROOT}/logs", __file__, main)
		"""
		# Import datetime
		from datetime import datetime

		# Build log file path
		file_basename: str = os.path.splitext(os.path.basename(filepath))[0]
		date_time: str = datetime.now().strftime("%Y-%m-%d_%H-%M-%S")
		log_filepath: str = f"{logs_folder}/{file_basename}/{date_time}.log"

		# Launch function with arguments if any
		with LogToFile(log_filepath):
			return func(*args, **kwargs)

