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package com.aliyun.datahub.model.serialize;

import com.aliyun.datahub.common.transport.Response;
import com.aliyun.datahub.common.util.JacksonParser;
import com.aliyun.datahub.exception.*;
import com.aliyun.datahub.rest.DatahubHttpHeaders;
import org.codehaus.jackson.JsonNode;
import org.codehaus.jackson.map.ObjectMapper;

import java.io.IOException;

/**
 * parse for JSON error responses from Datahub services.
 */
public class JsonErrorParser implements ErrorParser{

    public DatahubServiceException parse(Response response) {

        DatahubServiceException ex = null;

        try {
            ObjectMapper mapper = JacksonParser.getObjectMapper();

            JsonNode tree = mapper.readTree(response.getBody());
            JsonNode node = tree.get("ErrorCode");
            if (node.isNull()) {
                ex = new DatahubServiceException(new String(response.getBody()));
            } else {
                String er = node.asText();
                if (er.equals("InvalidParameter") || er.equals("InvalidSubscription")) {
                    ex = new InvalidParameterException(tree.get("ErrorMessage").asText());
                } else if (er.equals("InvalidCursor")) {
                    ex = new InvalidCursorException(tree.get("ErrorMessage").asText());
                } else if (er.equals("NoSuchTopic") || er.equals("NoSuchProject") || er.equals("NoSuchSubscription")
                        || er.equals("NoSuchShard") || er.equals("NoSuchConnector") || er.equals("NoSuchMeteringInfo")) {
                    ex = new ResourceNotFoundException(tree.get("ErrorMessage").asText());
                } else if (er.equals("ProjectAlreadyExist")
                        || er.equals("TopicAlreadyExist")
                        || er.equals("ConnectorAlreadyExist")) {
                    ex = new ResourceExistException(tree.get("ErrorMessage").asText());
                } else if (er.equals("Unauthorized")) {
                    ex = new AuthorizationFailureException(tree.get("ErrorMessage").asText());
                } else if (er.equals("NoPermission")) {
                    ex = new NoPermissionException(tree.get("ErrorMessage").asText());
                } else if (er.equals("InvalidShardOperation")) {
                    ex = new InvalidOperationException(tree.get("ErrorMessage").asText());
                } else if (er.equals("OperationDenied")) {
                    ex = new OperationDeniedException(tree.get("ErrorMessage").asText());
                } else if (er.equals("LimitExceeded")) {
                    ex = new LimitExceededException(tree.get("ErrorMessage").asText());
                } else if (er.equals("OdpsServiceError")) {
                    ex = new OdpsException(tree.get("ErrorMessage").asText());
                } else if (er.equals("MysqlServiceError")) {
                    ex = new MysqlException(tree.get("ErrorMessage").asText());
                } else if (er.equals("InternalServerError")) {
                    ex = new InternalFailureException(tree.get("ErrorMessage").asText());
                } else if (er.equals("SubscriptionOffline")) {
                	ex = new SubscriptionOfflineException(tree.get("ErrorMessage").asText());
                } else if (er.equals("OffsetReseted")) {
                	ex = new OffsetResetedException(tree.get("ErrorMessage").asText());
                } else if (er.equals("OffsetSessionClosed")) {
                	ex = new OffsetSessionClosedException(tree.get("ErrorMessage").asText());
                } else if (er.equals("OffsetSessionChanged")) {
                	ex = new OffsetSessionChangedException(tree.get("ErrorMessage").asText());
                } else {
                    ex = new DatahubServiceException(tree.get("ErrorMessage").asText());
                }
                ex.setErrorCode(er);
            }
        } catch (IOException e) {
            ex = new DatahubServiceException(new String(response.getBody()));
        }

        ex.setStatusCode(response.getStatus());
        ex.setRequestId(response.getHeader(DatahubHttpHeaders.HEADER_DATAHUB_REQUEST_ID));
        return ex;
    }

    private static JsonErrorParser instance;

    public static JsonErrorParser getInstance() {
        if (instance == null)
            instance = new JsonErrorParser();
        return instance;
    }
}