import json
from flask import Flask, request
from nacos import NacosClient

app = Flask(__name__)

config_json = {
    "local": {
        "address": "192.168.3.80:8848",
        "namespace": "dev",
        "username": "nacos",
        "password": "nacos",
        "data_id": "python-mendunr",
        "group": "DEFAULT_GROUP"
    },
    "production": {
        "address": "localhost:8848",
        "namespace": "dev",
        "username": "nacos",
        "password": "nacos",
        "data_id": "python-mendunr",
        "group": "DEFAULT_GROUP"
    }
}


class NacosConfig:
    def __init__(self, environment='local'):
        env_config = config_json[environment]
        self.SERVER_ADDRESSES = env_config['address']
        self.NAMESPACE = env_config['namespace']
        self.USERNAME = env_config['username']
        self.PASSWORD = env_config['password']
        self.data_id = env_config['data_id']
        self.group = env_config['group']
        self.client = NacosClient(server_addresses=self.SERVER_ADDRESSES, namespace=self.NAMESPACE,
                                  username=self.USERNAME, password=self.PASSWORD)
        self.config_data = None

    def load_config(self):
        """从Nacos加载配置"""
        config_str = self.client.get_config(data_id=self.data_id, group=self.group)
        self.config_data = json.loads(config_str) if config_str else {}
        return self.config_data

    def get_config(self):
        """返回当前加载的配置数据"""
        if self.config_data is None:
            self.load_config()
        return self.config_data


# 使用配置文件中的生产环境配置 （本地是local,提交代码是production）!!
nacos_config = NacosConfig(environment='production')
configs = nacos_config.get_config()


@app.route('/config')
def get_config_route():
    """返回当前配置，或者可以选择在这里重新加载配置"""
    # 可以在这里选择是否重新加载配置，或者根据需要进行其他逻辑处理
    # nacos_config.load_config()  # 如果需要每次请求都检查更新，可以取消注释这行代码
    return json.dumps(nacos_config.get_config())


if __name__ == '__main__':
    app.run(debug=True)