import json
from pathlib import Path
from decimal import Decimal
from utils import dingding, smtp
import datetime
import time
import pytz

def as_num(x):
    # 32f表示保留32位小数点的float型
    y = '{:.32f}'.format(x)
    return(y)


def get_current_timestamp():
    """
    获取系统的时间.
    :return:
    """
    return int(time.time() * 1000)

def alert(msg):
    print(msg)
    dingding.dingding_at_me(msg)
    smtp.send_email(msg)

def cn_time():
    """
    chinese time
    https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
    """
    return datetime.datetime.now(pytz.timezone('Asia/Shanghai'))


def _get_trader_dir(temp_name: str):
    """
    Get path where trader is running in.
    """
    cwd = Path.cwd()
    temp_path = cwd.joinpath(temp_name)

    if temp_path.exists():
        return cwd, temp_path

    if not temp_path.exists():
        temp_path.mkdir()

    return cwd, temp_path


TRADER_DIR, TEMP_DIR = _get_trader_dir("trader")


def get_file_path(filename: str):
    """
    Get path for temp file with filename.
    """
    return TEMP_DIR.joinpath(filename)


def get_folder_path(folder_name: str):
    """
    Get path for temp folder with folder name.
    """
    folder_path = TEMP_DIR.joinpath(folder_name)
    if not folder_path.exists():
        folder_path.mkdir()
    return folder_path

def load_json(filename: str):
    """
    Load data from json file in temp path.
    """
    filepath = get_file_path(filename)

    if filepath.exists():
        with open(filepath, mode="r", encoding="UTF-8") as f:
            data = json.load(f)
        return data
    else:
        save_json(filename, {})
        return {}


def save_json(filename: str, data: dict):
    """
    Save data into json file in temp path.
    """
    filepath = get_file_path(filename)
    with open(filepath, mode="w+", encoding="UTF-8") as f:
        json.dump(
            data,
            f,
            indent=4,
            ensure_ascii=False
        )


def round_to(value: float, target: float) -> float:
    """
    Round price to price tick value.
    """
    value = Decimal(str(value))
    target = Decimal(str(target))
    #round() 方法返回浮点数x的四舍五入值。
    ##eg:
    ## quantity = round_to(float(config.quantity), float(config.min_qty))
    rounded = float(int(round(value / target)) * target)
    return rounded