# -*- coding: utf-8 -*-
# @Time : 2022/6/24 14:04
# @Author : MaochengHu
# @Email : wojiaohumaocheng@gmail.com
# @File : config_parser.py
# @Project : person_monitor


import os
import ast
import sys

import yaml
import prettytable as pt
from importlib import import_module
from dev.src.utils.path_checker import check_file_exist
from dev.src.utils.log import logger, SplitLine


class Config(object):
    """
    This class is used for loading config from python script.
    """
    def __init__(self, config_path):
        check_file_exist(config_path)
        file_ext_name = os.path.splitext(config_path)[1]
        if file_ext_name == ".py":
            self.config_from_python_config(config_path)
        else:
            error_msg = "yolo config_files path is not exist -> {}".format(config_path)
            logger.error(error_msg)
            assert IOError(error_msg)

    def copy(self, new_config_dict: dict):
        """
        Copies this config_files into a new config_files object, making
        the changes given by new_config_dict.
        """

        ret = Config(vars(self))

        for key, val in new_config_dict.items():
            ret.__setattr__(key, val)

        return ret

    def replace(self, new_config_dict: dict):
        """
        Copies new_config_dict into this config_files object.
        Note: new_config_dict can also be a config_files object.
        """
        if isinstance(new_config_dict, Config):
            new_config_dict = vars(new_config_dict)

        for key, val in new_config_dict.items():
            self.__setattr__(key, val)

    def get(self, k, rv=None):
        """
        Get config file with key-value format
        :param k:
        :param rv:
        :return:
        """
        dict_v = self.__dict__.get(k, rv)
        return dict_v

    @staticmethod
    def _validate_py_syntax(filename):
        with open(filename, 'r', encoding='utf-8') as f:
            # Setting encoding explicitly to resolve coding issue on windows
            content = f.read()
        try:
            ast.parse(content)
        except SyntaxError as e:
            raise SyntaxError('There are syntax errors in config_files '
                              'file {}: {}'.format(filename, e))

    @staticmethod
    def _load_yaml(yaml_path: str):
        assert os.path.exists(yaml_path), "cannot find {}".format(yaml_path)
        with open(yaml_path, 'r', encoding='utf-8') as yaml_file:
            config = yaml.load(yaml_file, Loader=yaml.FullLoader)
        return config

    def config_from_yaml(self, yaml_path: str):
        """
        Get config file from yaml file
        :param yaml_path:
        """
        yaml_dict = self._load_yaml(yaml_path)
        self.config_from_dict(yaml_dict)

    def config_from_python_config(self, config_path):
        """
        Get config file from python file
        :param config_path:
        :return:
        """
        self._validate_py_syntax(config_path)
        python_name, extension = os.path.splitext(os.path.basename(config_path))
        # son_package = os.path.basename(os.path.dirname(__file__))
        sys.path.append(os.path.dirname(os.path.abspath(__file__)))
        mod = import_module("{}".format(python_name))
        del_module = ["os"]
        mod_dict = mod.__dict__

        for key in list(mod_dict.keys()):
            if "__" in key or key in del_module:
                del mod_dict[key]
        self.config_from_dict(mod_dict)

    def config_from_dict(self, insert_dict):
        """
        Get config file from dict
        :param insert_dict:
        """
        self.__dict__.update(insert_dict)

    def show_info(self, name=None):
        """
        Show Config file by config file dict
        :param name:
        """
        name = "Config" if name is None else name
        with SplitLine("{} Info".format(name), "-") as title_line:
            tb = pt.PrettyTable()
            tb.header_style = "title"
            tb.padding_width = 10
            tb.field_names = ["Parameters", "Values"]
            for key, value in self.__dict__.items():
                if key.startswith("__"):
                    continue
                tb.add_row((str(key), str(value)))
            logger.info("\n{}\n".format(tb))

    def __call__(self, *args, **kwargs):
        pass


def main():
    """
    test code
    """
    python_config_path = "../../develop/config_files/yolox_nano_bytetrack_tin.py"
    config = Config(python_config_path)
    config.show_info()


if __name__ == "__main__":
    main()