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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.github.airiot.sdk.client.http.clients;

import feign.FeignException;
import io.github.airiot.sdk.client.dto.ResponseDTO;
import io.github.airiot.sdk.client.dto.Token;
import io.github.airiot.sdk.client.exception.AuthorizationException;
import io.github.airiot.sdk.client.properties.AuthorizationProperties;
import io.github.airiot.sdk.client.service.AuthorizationClient;
import io.github.airiot.sdk.client.service.core.AppClient;

import java.time.Duration;
import java.util.concurrent.atomic.AtomicReference;

public class HttpProjectAuthorizationClientImpl implements AuthorizationClient {

    private final AtomicReference holder = new AtomicReference<>();
    private final AppClient appClient;
    private final AuthorizationProperties properties;

    public HttpProjectAuthorizationClientImpl(AppClient appClient, AuthorizationProperties properties) {
        this.appClient = appClient;
        this.properties = properties;
    }

    @Override
    public synchronized Token getToken() throws AuthorizationException {
        TokenHolder token = this.holder.get();
        if (token != null && token.equals(this.properties) && !token.getToken().isExpired(Duration.ofSeconds(60))) {
            return token.getToken();
        }
        
        try {
            ResponseDTO response = this.appClient.getToken(this.properties.getAppKey(), this.properties.getAppSecret());
            Token t = response.unwrap(() -> new AuthorizationException(response.getCode(), response.getMessage(), response.getDetail()));
            this.holder.set(new TokenHolder(this.properties.getAppKey(), this.properties.getAppSecret(), t));
            return t;
        } catch (FeignException.NotFound e) {
            throw new AuthorizationException(404, "获取平台 token 失败", "请检查平台地址及端口是否正确", e);
        } catch (FeignException e) {
            throw new AuthorizationException(e.status(), e.getMessage(), e.contentUTF8());
        } catch (Exception e) {
            throw new AuthorizationException(500, "获取平台 token 失败", e.getMessage(), e);
        }
    }
}