#!/usr/bin/python3
# -*- coding: utf-8 -*-
import json
from typing import List


def get_current_weather(location: str, unit: str = None):
    """
    如果函数的名字叫作 “get_current_weather” ,
    那么就需要一个同名 python 脚本 “get_current_weather.py” ，
    同时其中应包含一个名为 “get_current_weather” 的函数。
    """
    unit = unit or "fahrenheit"

    if "tokyo" in location.lower():
        return json.dumps({"location": location, "temperature": "10", "unit": "celsius"})
    elif "san francisco" in location.lower():
        return json.dumps({"location": location, "temperature": "72", "unit": "fahrenheit"})
    else:
        return json.dumps({"location": location, "temperature": "22", "unit": "celsius"})


def kwargs() -> List[str]:
    """
    函数调用时会根据此处返回的 key 来创建 kwargs 关键字参数，如果存在 key 的值没有提供，则会将其赋值为 None。
    因此在定义函数时有默认值的参数的值应该为 None，而其真正的默认值可在函数内部赋值，以免被 kwargs 中的 None 覆盖。
    """
    return ["location", "unit"]


def main():
    tools = [
        {
            "type": "function",
            "function": {
                "name": "get_current_weather",
                "description": "Get the current weather in a given location",
                "parameters": {
                    "type": "object",
                    "properties": {
                        "location": {
                            "type": "string",
                            "description": "The city and state, e.g. San Francisco, CA",
                        },
                        "unit": {"type": "string", "enum": ["celsius", "fahrenheit"]},
                    },
                    "required": ["location"],
                },
            },
        }
    ]
    tools_ = json.dumps(tools, ensure_ascii=False)
    print(tools_.replace("\"", "\\\""))

    result = get_current_weather("beijing")
    print(result)
    return


if __name__ == '__main__':
    main()