import json

import requests

header = {
    "Context-Type": "application/json",
    "Accept": "application/json"
}


class EurekaClient(object):

    def __init__(self, base_url):
        self.base_url = base_url

    def get_apps_info(self, app_id: str) -> dict:
        url = f"{self.base_url}/eureka/apps/{app_id}"
        print(f"获取{app_id}下的实例信息: {url}")
        return json.loads(requests.get(url, headers=header).content)

    def app_instance_up(self, app_id: str, instance_id: str):
        self.app_update_status(app_id, instance_id, "UP")

    def app_instance_out(self, app_id: str, instance_id: str):
        self.app_update_status(app_id, instance_id, "OUT_OF_SERVICE")

    def app_update_status(self, app_id: str, instance_id: str, status: str):
        try:
            url = f"{self.base_url}/eureka/apps/{app_id}/{instance_id}/status?value={status}"
            resp = requests.put(url, headers=header)
            print(
                f"修改{app_id}下，实例{instance_id}的状态为{status}\n"
                f"\t 请求URL: {url} \n"
                f"\t 返回状态码: {resp.status_code}, 返回信息: {resp.content}"
            )
        except Exception as e:
            print(f"修改{app_id}下，实例{instance_id}的状态为{status}异常: {e}")