package org.onap.appc.flow.controller.node;

import static org.onap.appc.flow.controller.utils.FlowControllerConstants.HTTP;
import static org.onap.appc.flow.controller.utils.FlowControllerConstants.INPUT_CONTEXT;
import static org.onap.appc.flow.controller.utils.FlowControllerConstants.INPUT_HOST_IP_ADDRESS;
import static org.onap.appc.flow.controller.utils.FlowControllerConstants.INPUT_PORT_NUMBER;
import static org.onap.appc.flow.controller.utils.FlowControllerConstants.INPUT_REQUEST_ACTION;
import static org.onap.appc.flow.controller.utils.FlowControllerConstants.INPUT_SUB_CONTEXT;
import static org.onap.appc.flow.controller.utils.FlowControllerConstants.INPUT_URL;

import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;
import java.util.Properties;
import org.apache.commons.lang.StringUtils;
import org.onap.ccsdk.sli.core.sli.SvcLogicContext;

/**
 * Helper class for RestServiceNode
 */
class ResourceUriExtractor {

  private static final EELFLogger log = EELFManager.getInstance().getLogger(RestServiceNode.class);

  private ResourceUriExtractor() {
  }

  static String extractResourceUri(SvcLogicContext ctx, Properties prop) throws Exception {
    String resourceUri = ctx.getAttribute(INPUT_URL);

    if (StringUtils.isBlank(resourceUri)) {
      resourceUri = getAddress(ctx);
      log.info("resourceUri= " + resourceUri);
      resourceUri += getContext(ctx, prop);
      log.info("resourceUri= " + resourceUri);
      resourceUri += getSubContext(ctx, prop);
    }
    log.info("resourceUri= " + resourceUri);

    return resourceUri;
  }

  private static String getAddress(SvcLogicContext ctx) {
    String address = ctx.getAttribute(INPUT_HOST_IP_ADDRESS);
    String port = ctx.getAttribute(INPUT_PORT_NUMBER);
    return HTTP + address + ":" + port;
  }

  private static String getContext(SvcLogicContext ctx, Properties prop) {
    String context;
    if (StringUtils.isNotBlank(ctx.getAttribute(INPUT_CONTEXT))) {
      context = "/" + ctx.getAttribute(INPUT_CONTEXT);
    } else if (prop.getProperty(ctx.getAttribute(INPUT_REQUEST_ACTION) + ".context") != null) {
      context = "/" + prop.getProperty(ctx.getAttribute(INPUT_REQUEST_ACTION) + ".context");
    } else {
      throw new IllegalArgumentException("Could Not found the context for operation " + ctx.getAttribute(INPUT_REQUEST_ACTION));
    }
    return context;
  }

  private static String getSubContext(SvcLogicContext ctx, Properties prop) {
    String subContext;
    if (StringUtils.isNotBlank(ctx.getAttribute(INPUT_SUB_CONTEXT))) {
      subContext = "/" + ctx.getAttribute(INPUT_SUB_CONTEXT);
    } else if (prop.getProperty(ctx.getAttribute(INPUT_REQUEST_ACTION) + ".sub-context") != null) {
      subContext = "/" + prop.getProperty(ctx.getAttribute(INPUT_REQUEST_ACTION) + ".sub-context");
    } else {
      throw new IllegalArgumentException("Could Not found the sub context for operation " + ctx.getAttribute(INPUT_REQUEST_ACTION));
    }
    return subContext;
  }

}