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package com.aliyuncs.v5.utils;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;


public class AuthUtils {
    private static volatile String clientType = System.getenv("ALIBABA_CLOUD_PROFILE");
    private static volatile String environmentAccessKeyId;
    private static volatile String environmentAccesskeySecret;
    private static volatile String environmentECSMetaData;
    private static volatile String environmentCredentialsFile;
    private static volatile String privateKey;

    public static String getPrivateKey(String filePath) {
        if (null == privateKey) {
            synchronized (AuthUtils.class) {
                if (null == privateKey) {
                    FileInputStream in = null;
                    byte[] buffer;
                    try {
                        in = new FileInputStream(new File(filePath));
                        buffer = new byte[in.available()];
                        in.read(buffer);
                        privateKey = new String(buffer, "UTF-8");
                    } catch (IOException e) {
                        e.printStackTrace();
                    } finally {
                        if (in != null) {
                            try {
                                in.close();
                            } catch (IOException e) {
                                e.printStackTrace();
                            }
                        }
                    }
                }
            }
        }
        return privateKey;
    }

    public static void setPrivateKey(String key) {
        privateKey = key;
    }

    public static String getClientType() {
        if (null == clientType) {
            AuthUtils.clientType = "default";
            return AuthUtils.clientType;
        } else {
            return AuthUtils.clientType;
        }
    }

    public static void setClientType(String clientType) {
        AuthUtils.clientType = clientType;
    }

    public static String getEnvironmentAccessKeyId() {
        if (null == AuthUtils.environmentAccessKeyId) {
            return System.getenv("ALIBABA_CLOUD_ACCESS_KEY_ID");
        } else {
            return AuthUtils.environmentAccessKeyId;
        }
    }

    public static void setEnvironmentAccessKeyId(String environmentAccessKeyId) {
        AuthUtils.environmentAccessKeyId = environmentAccessKeyId;
    }

    public static String getEnvironmentAccessKeySecret() {
        if (null == AuthUtils.environmentAccesskeySecret) {
            return System.getenv("ALIBABA_CLOUD_ACCESS_KEY_SECRET");
        } else {
            return AuthUtils.environmentAccesskeySecret;
        }
    }

    public static void setEnvironmentAccessKeySecret(String environmentAccesskeySecret) {
        AuthUtils.environmentAccesskeySecret = environmentAccesskeySecret;
    }

    public static String getEnvironmentECSMetaData() {
        if (null == AuthUtils.environmentECSMetaData) {
            return System.getenv("ALIBABA_CLOUD_ECS_METADATA");
        } else {
            return AuthUtils.environmentECSMetaData;
        }
    }

    public static void setEnvironmentECSMetaData(String environmentECSMetaData) {
        AuthUtils.environmentECSMetaData = environmentECSMetaData;
    }

    public static String getEnvironmentCredentialsFile() {
        if (null == AuthUtils.environmentCredentialsFile) {
            return System.getenv("ALIBABA_CLOUD_CREDENTIALS_FILE");
        } else {
            return AuthUtils.environmentCredentialsFile;
        }
    }

    public static void setEnvironmentCredentialsFile(String environmentCredentialsFile) {
        AuthUtils.environmentCredentialsFile = environmentCredentialsFile;
    }
}