package org.daisy.pipeline.tts.config;
   
   import java.net.URI;
   import java.util.HashMap;
   import java.util.Map;
   
   import net.sf.saxon.s9api.QName;
   import net.sf.saxon.s9api.XdmNode;
   
  import org.daisy.common.properties.Properties;
  import org.daisy.pipeline.tts.config.ConfigReader;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class DynamicPropertiesExtension implements ConfigReader.Extension {
  
  	private static final Logger logger = LoggerFactory.getLogger(VoiceConfigExtension.class);
  	private static final String HOST_PROTECTION_PROPERTY = Properties.getProperty("org.daisy.pipeline.tts.host.protection", "true");
  
  	private Map<String,String> props = new HashMap<>();
  
  	@Override
  	public boolean parseNode(XdmNode node, URI documentURI, ConfigReader parent) {
  		String name = node.getNodeName().getLocalName();
  		String key = node.getAttributeValue(new QName(null, "key"));
  		if ("property".equalsIgnoreCase(name)) {
  			if (HOST_PROTECTION_PROPERTY.equalsIgnoreCase("false")) {
  					logger.warn("'" + HOST_PROTECTION_PROPERTY + "' setting is deprecated. " +
  					            "It may become unavailable in future version of DAISY Pipeline.");
  				if (key == null) {
  					logger.warn("Missing key for config's property " + node.toString());
  				} else {
  					String value = node.getAttributeValue(new QName(null, "value"));
  					if (value == null) {
  						logger.warn("Missing value for config's property " + node.toString());
  					} else {
  						if (!key.startsWith("org.daisy.pipeline.tts."))
  							key = "org.daisy.pipeline.tts." + key;
  						props.put(key, value);
  					}
  				}
  			} else {
  				if (key != null) {
  					logger.warn("Ignoring property " + key
  					            + " inside TTS config file.\nPlease use a"
  					            + " system property or environment variable instead.");
  				}
  			}
  			return true;
  		} else {
  			return false;
  		}
  	}
  
  	public Map<String,String> getDynamicProperties() {
  		return props;
  	}
  }