import numpy as np
import os, sys
import pickle
import yaml
from easydict import EasyDict as edict
from typing import Any, IO

ROOT_PATH = os.path.join(os.path.dirname(os.path.realpath(__file__)), '..')

class TextLogger:
    def __init__(self, log_path):
        self.log_path = log_path
        with open(self.log_path, "w") as f:
            f.write("")
    def log(self, log):
        with open(self.log_path, "a+") as f:
            f.write(log + "\n")

class Loader(yaml.SafeLoader):
    """YAML Loader with `!include` constructor."""

    def __init__(self, stream: IO) -> None:
        """Initialise Loader."""

        try:
            self._root = os.path.split(stream.name)[0]
        except AttributeError:
            self._root = os.path.curdir

        super().__init__(stream)

def construct_include(loader: Loader, node: yaml.Node) -> Any:
    """Include file referenced at node."""

    filename = os.path.abspath(os.path.join(loader._root, loader.construct_scalar(node)))
    extension = os.path.splitext(filename)[1].lstrip('.')

    with open(filename, 'r') as f:
        if extension in ('yaml', 'yml'):
            return yaml.load(f, Loader)
        elif extension in ('json', ):
            return json.load(f)
        else:
            return ''.join(f.readlines())

def get_config(config_path):
    yaml.add_constructor('!include', construct_include, Loader)
    with open(config_path, 'r') as stream:
        config = yaml.load(stream, Loader=Loader)
    config = edict(config)
    _, config_filename = os.path.split(config_path)
    config_name, _ = os.path.splitext(config_filename)
    config.name = config_name
    return config

def ensure_dir(path):
    """
    create path by first checking its existence,
    :param paths: path
    :return:
    """
    if not os.path.exists(path):
        os.makedirs(path)
        
def read_pkl(data_url):
    file = open(data_url,'rb')
    content = pickle.load(file)
    file.close()
    return content