package frame.variant;

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

import frame.util.Util;

public class VariantLink {

	public static void moveOnConsumer(IVariantsConsumer consumer, IVariantsProvider... providers) throws Exception {
		if (providers == null) {
			return;
		}
		
		List<String> nameList = consumer.getVariantNameList();
		boolean multi = providers.length > 1;
		boolean first = true;
		
		for (String name: nameList) {
			first = true;
			
			for (IVariantsProvider provider: providers) {
				if (provider.containsVariant(name)) {
					if (first || (multi && consumer.isVariantNull(name))) {
						Object value = provider.getVariantValue(name);
						consumer.setVariant(name, value);
					}
				}
				
				first = false;
			}
		}
	}
	
	public static boolean moveOnConsumer(IVariantsProvider provider, IVariantsConsumer consumer, Set<String> excludeNames) throws Exception {
		boolean excluded = false;
		
		Set<String> lowerSet = new HashSet<String>();
		for (String one: excludeNames) {
			lowerSet.add(one.toLowerCase());
		}
		
		List<String> nameList = consumer.getVariantNameList();
		if (Util.isEmptyStr(nameList)) {
			return excluded;
		}
		for (String name: nameList) {
			if (lowerSet.contains(name)) {
				excluded = true;
				continue;
			}
			
			if (provider.containsVariant(name)) {
				Object value = provider.getVariantValue(name);
				consumer.setVariant(name, value);
			}
		}		
		
		return excluded;
	}
	

	public static void moveOnProvider(IVariantsProvider provider, IVariantsConsumer consumer) throws Exception {
		List<String> nameList = provider.getVariantNameList();
		
		for (String name: nameList) {
			if (consumer.containsVariant(name)) {
				Object value = provider.getVariantValue(name);
				consumer.setVariant(name, value);
			}
		}
	}
	
	public static boolean moveOnProvider(IVariantsProvider provider, IVariantsConsumer consumer, Set<String> excludeNames) throws Exception {
		boolean excluded = false;
		
		Set<String> lowerSet = new HashSet<String>();
		for (String one: excludeNames) {
			lowerSet.add(one.toLowerCase());
		}
		
		List<String> nameList = provider.getVariantNameList();
		
		for (String name: nameList) {
			if (lowerSet.contains(name)) {
				excluded = true;
				continue;
			}
			
			if (consumer.containsVariant(name)) {
				Object value = provider.getVariantValue(name);
				consumer.setVariant(name, value);
			}
		}		
		
		return excluded;
	}

}