#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
# @Version     : Python 3.11.4
# @Software    : Sublime Text 4
# @Author      : StudentCWZ
# @Email       : StudentCWZ@outlook.com
# @Date        : 2023/10/28 17:44
# @File        : logger.py
# @Description :
"""

import os
import sys

from flask import Flask, request, g
from loguru import logger

from .format import patching
from application.libs.helper import ConfigHelper


class FlaskLoguru:
    def __init__(self, app=None):
        """
        Construct a new FlaskLoguru instance.

        :param app: Optional Flask app to initialize this FlaskLoguru instance for.
        """
        if app is not None:
            self.init_app(app)

    def init_app(self, app: Flask) -> None:
        """
        Initialize the given Flask app for logging.

        :param app: The Flask app to initialize.
        """

        # Initialize ConfigHelper
        config_helper = ConfigHelper(app)
        # Fetch the logging configuration from the app's config
        cfg = config_helper.Logger

        # Configure logger based on provided config
        log_type = cfg.get('Type', 'terminal')
        level = cfg.get('Level', 'DEBUG')
        path = cfg.get('Path')
        name = cfg.get('Name')
        _format = cfg.get('Format') or patching
        rotation = cfg.get('Rotation', '1 day')
        enqueue = cfg.get('Enqueue', False)
        retention = cfg.get('Retention', '10 days')

        # Remove any existing handlers from the logger
        logger.remove()

        # If the logger type is 'both' or 'file' and a path and a name are provided, add a file logger
        if self._should_add_file_logger(log_type, path, name):
            full_path = os.path.join(path, name)
            logger.add(full_path, level=level, format=_format, rotation=rotation, retention=retention, enqueue=enqueue)

        # If the logger type is 'both' or 'terminal', add a terminal logger
        if self._should_add_terminal_logger(log_type):
            logger.add(sys.stderr, level=level, format=_format)

        # Register this logger with the app
        app.extensions.setdefault('loguru', {})
        app.extensions['loguru'][self] = logger

        # Add logger to Flask's before, after and teardown request handlers
        @app.before_request
        def _log_request_start():
            """
            Log the start of the request.
            """
            if request.method == 'POST':
                data = dict(url=request.url, method=request.method, ip=request.remote_addr,
                            request_body=request.get_json())
            else:
                data = dict(url=request.url, method=request.method, ip=request.remote_addr,
                            request_body="")
            g.logger = logger.bind(data=data)
            g.logger.info('Request started')

        @app.after_request
        def _log_request_completion(response):
            """
            Log the end of the request.
            """
            g.logger.info('Request completed')
            return response

        @app.teardown_request
        def _log_request_teardown(exception=None):
            """
            Log any exception that occurred during the request.
            """
            if exception:
                data = dict(exception=str(exception))
                g.logger = logger.bind(data=data)
                g.logger.exception('An error occurred during the request')

    @staticmethod
    def _should_add_file_logger(log_type: str, path: str, name: str) -> bool:
        """
        Determine if a file logger should be added.
        """
        return log_type in ['both', 'file'] and path and name

    @staticmethod
    def _should_add_terminal_logger(log_type: str) -> bool:
        """
        Determine if a terminal logger should be added.
        """
        return log_type in ['both', 'terminal']