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package com.ksyun.api.sdk.client;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

import com.ksyun.api.sdk.auth.Credential;
import com.ksyun.api.sdk.auth.ICredentialProvider;
import com.ksyun.api.sdk.auth.ISigner;
import com.ksyun.api.sdk.auth.ShaHmac1Singleton;
import com.ksyun.api.sdk.exceptions.ClientException;
import com.ksyun.api.sdk.http.FormatType;
import com.ksyun.api.sdk.regions.CustomizedEndpointsParser;
import com.ksyun.api.sdk.regions.Endpoint;
import com.ksyun.api.sdk.regions.IEndpointsProvider;
import com.ksyun.api.sdk.regions.InternalEndpointsParser;
import com.ksyun.api.sdk.regions.LocationConfig;
import com.ksyun.api.sdk.regions.ProductDomain;
import com.ksyun.api.sdk.regions.RemoteEndpointsParser;


public class DefaultProfile implements IClientProfile {

    private static DefaultProfile profile        = null;
    private static List endpoints      = null;

    private Credential            credential     = null;
    private String                regionId       = null;
    private FormatType            acceptFormat   = null;
    private ISigner               isigner        = null;
    private IEndpointsProvider    iendpoints     = null;
    private IEndpointsProvider    remoteProvider = null;
    private ICredentialProvider   icredential    = null;
    private LocationConfig        locationConfig = new LocationConfig();

    private DefaultProfile() {
        this.locationConfig = new LocationConfig();
        this.iendpoints = new InternalEndpointsParser();
        this.remoteProvider = RemoteEndpointsParser.initRemoteEndpointsParser();
    }

    private DefaultProfile(String region, Credential creden) {
        this.iendpoints = new InternalEndpointsParser();
        this.remoteProvider = RemoteEndpointsParser.initRemoteEndpointsParser();
        this.credential = creden;
        this.regionId = region;
        this.locationConfig = new LocationConfig();
    } 

    private DefaultProfile(String region, Credential creden, IEndpointsProvider provider) {
        this.iendpoints = provider;
        this.credential = creden;
        this.regionId = region;
        this.locationConfig = new LocationConfig();
        this.remoteProvider = RemoteEndpointsParser.initRemoteEndpointsParser();
    }

    private DefaultProfile(ICredentialProvider icredential) {
        this.icredential = icredential;
        this.iendpoints = new InternalEndpointsParser();
        this.remoteProvider = RemoteEndpointsParser.initRemoteEndpointsParser();
        this.locationConfig = new LocationConfig();
    }

    private DefaultProfile(String region, ICredentialProvider icredential) {
        this.regionId = region;
        this.icredential = icredential;
        this.iendpoints = new InternalEndpointsParser();
        this.locationConfig = new LocationConfig();
        this.remoteProvider = RemoteEndpointsParser.initRemoteEndpointsParser();
    }

    private DefaultProfile(ICredentialProvider icredential, String region, FormatType format) {
        this.regionId = region;
        this.acceptFormat = format;
        this.icredential = icredential;
        this.iendpoints = new InternalEndpointsParser();
        this.remoteProvider = RemoteEndpointsParser.initRemoteEndpointsParser();
        this.locationConfig = new LocationConfig();
    }

    @Override
    public synchronized ISigner getSigner() {
        if (null == isigner)
            this.isigner = ShaHmac1Singleton.INSTANCE.getInstance();
        return isigner;
    }

    @Override
    public synchronized String getRegionId() {
        return regionId;
    }

    @Override
    public synchronized FormatType getFormat() {
        return acceptFormat;
    }

    @Override
    public synchronized Credential getCredential() {
        if (null == credential && null != icredential)
            credential = icredential.fresh();
        return credential;
    }

    @Override
    public synchronized void setLocationConfig(String regionId, String product, String endpoint) {
        this.locationConfig = LocationConfig.createLocationConfig(regionId, product, endpoint);
    }

    @Override
    public List getEndpoints() throws ClientException {
        throw new UnsupportedOperationException();
    }

    @Override
    public synchronized List getEndpoints(String regionId, String product) throws ClientException {
        if (null == endpoints) {
            Endpoint endpoint = iendpoints.getEndpoint(regionId, product);
            if (endpoint != null) {
                endpoints = new ArrayList();
                endpoints.add(endpoint);
            }
        }

        return endpoints;
    }

    //    public synchronized List getEndpoints(String product,String serviceCode, String endpointType) throws ClientException {
    //        if (null == endpoints || Endpoint.findProductDomain(regionId, product, endpoints) == null) {
    //            if(serviceCode!=null){
    //                endpoints = remoteProvider.getEndpoints(regionId, serviceCode, endpointType, credential, locationConfig);
    //            }
    //            if (endpoints == null|| Endpoint.findProductDomain(regionId, product, endpoints) == null) {
    //
    //                endpoints = iendpoints.getEndpoints();
    //            }
    //        }
    //        return endpoints;
    //    }

    @Override
    public synchronized List getEndpoints(String product, String regionId, String serviceCode,
                                                    String endpointType) throws ClientException {
        if (null == endpoints) {
            Endpoint endpoint = null;
            if (serviceCode != null) {
                endpoint = remoteProvider.getEndpoint(regionId, product, serviceCode, endpointType, credential,
                        locationConfig);
            }
            if (endpoint == null) {
                endpoint = iendpoints.getEndpoint(regionId, product);
            }
            if (endpoint != null) {
                endpoints = new ArrayList();
                endpoints.add(endpoint);
            }
        } else if (Endpoint.findProductDomain(regionId, product, endpoints) == null) {
            Endpoint endpoint = null;
            if (serviceCode != null) {
                endpoint = remoteProvider.getEndpoint(regionId, product, serviceCode, endpointType,
                        credential, locationConfig);
            }
            if (endpoint == null) {
                endpoint = iendpoints.getEndpoint(regionId, product);
            }
            if (endpoint != null) {
                for (String region : endpoint.getRegionIds()) {
                    for (ProductDomain productDomain : endpoint.getProductDomains()) {
                        addEndpoint(endpoint.getName(), region, product, productDomain.getDomianName());
                    }
                }
            }
        }
        return endpoints;
    }


    public synchronized static DefaultProfile getProfile() {
        if (null == profile)
            profile = new DefaultProfile();

        return profile;
    }

    public synchronized static DefaultProfile getProfile(String regionId, ICredentialProvider icredential) {
        profile = new DefaultProfile(regionId, icredential);
        return profile;
    }

    public synchronized static DefaultProfile getProfile(String regionId, String accessKeyId, String secret) {
        Credential creden = new Credential(accessKeyId, secret);
        profile = new DefaultProfile(regionId, creden);
        return profile;
    }

    public synchronized static DefaultProfile getProfile(String regionId, String accessKeyId, String secret,
                                                         String stsToken) {
        Credential creden = new Credential(accessKeyId, secret, stsToken);
        profile = new DefaultProfile(regionId, creden);
        return profile;
    }

    /**
     *      * 给个性化用户使用的，CustomizedEndpointsParser 通过这个去解析endpoint,
     * 非本地和location；所以一般情况不要使用这个 regionId,
     * 
     * eg: cn-hangzhou productDomainMap,eg: Map
     * productDomainMap= new HashMap();
     * productDomainMap.put("ecs","ecs.aliyuncs.com") accessKeyId secret
     */
    public synchronized static DefaultProfile getProfile(String regionId, Map productDomainMap,
                                                         String accessKeyId, String secret) {
        Credential creden = new Credential(accessKeyId, secret);
        IEndpointsProvider provider = CustomizedEndpointsParser.initParser(regionId, productDomainMap);
        profile = new DefaultProfile(regionId, creden, provider);
        return profile;
    }

    public synchronized static DefaultProfile getProfile(String regionId, Map productDomainMap,
                                                         String accessKeyId, String secret, String stsToken) {
        Credential creden = new Credential(accessKeyId, secret, stsToken);
        IEndpointsProvider provider = CustomizedEndpointsParser.initParser(regionId, productDomainMap);
        profile = new DefaultProfile(regionId, creden, provider);
        return profile;
    }

    public synchronized static DefaultProfile getProfile(String regionId, IEndpointsProvider provider,
                                                         String accessKeyId, String secret) {
        Credential creden = new Credential(accessKeyId, secret);
        profile = new DefaultProfile(regionId, creden, provider);
        return profile;
    }

    public synchronized static DefaultProfile getProfile(String regionId, IEndpointsProvider provider,
                                                         String accessKeyId, String secret, String stsToken) {
        Credential creden = new Credential(accessKeyId, secret, stsToken);
        profile = new DefaultProfile(regionId, creden, provider);
        return profile;
    }

    public synchronized static void addEndpoint(String endpointName, String regionId, String product, String domain)
            throws ClientException {
        if (null == endpoints) {
            endpoints = getProfile().getEndpoints(regionId, product);
        }
        Endpoint endpoint = findEndpointByRegionId(regionId);
        if (null == endpoint) {
            addEndpoint_(endpointName, regionId, product, domain);
        } else {
            updateEndpoint(regionId, product, domain, endpoint);
        }
    }

    private static void addEndpoint_(String endpointName, String regionId, String product, String domain) {
        Set regions = new HashSet();
        regions.add(regionId);

        List productDomains = new ArrayList();
        productDomains.add(new ProductDomain(product, domain));
        Endpoint endpoint = new Endpoint(endpointName, regions, productDomains);
        if (endpoints == null) {
            endpoints = new ArrayList();
        }
        endpoints.add(endpoint);
    }

    private static void updateEndpoint(String regionId, String product, String domain, Endpoint endpoint) {
        Set regionIds = endpoint.getRegionIds();
        regionIds.add(regionId);

        List productDomains = endpoint.getProductDomains();
        ProductDomain productDomain = findProductDomain(productDomains, product);
        if (null == productDomain) {
            ProductDomain newProductDomain = new ProductDomain(product, domain);
            productDomains.add(newProductDomain);
        } else {
            productDomain.setDomianName(domain);
        }
    }

    private static Endpoint findEndpointByRegionId(String regionId) {
        if (null == endpoints) {
            return null;
        }
        for (Endpoint endpoint : endpoints) {
            if (endpoint.getRegionIds().contains(regionId)) {
                return endpoint;
            }
        }
        return null;
    }

    private static ProductDomain findProductDomain(List productDomains, String product) {
        for (ProductDomain productDomain : productDomains) {
            if (productDomain.getProductName().equals(product)) {
                return productDomain;
            }
        }
        return null;
    }


}