package frame.data;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import frame.object.data.IFilterSegmentProvider;

public class DataPool implements Iterable<DataCell>, IDataProvider, IFilterSegmentProvider {

	private Map<String, Variant> valueMap;
	private List<DataCell> cellList;
	private List<String> lowerNameList;

	public DataPool() throws Exception {
		valueMap = new HashMap<String, Variant>();
		cellList = new ArrayList<DataCell>();
		lowerNameList = new ArrayList<String>();
	}
	
	public void clear() {
		valueMap.clear();
		cellList.clear();
		lowerNameList.clear();
	}
	
	public void add(String name, Variant value) { 
		if (name == null) {
			return;
		}
		
		//1.
		name = name.toLowerCase();
		valueMap.put(name, value);
		
		//2.
		DataCell cell = new DataCell(name, value);
		cellList.add(cell);
		
		//3.
		lowerNameList.add(name);
	}

	public void add(String name, String value) {
		Variant variant = new Variant(value);
		add(name, variant);
	}

	public Variant getVariant(String name) {
		if (name == null) {
			return new Variant();
		}

		name = name.toLowerCase();
		Variant variant = valueMap.get(name);

		if (variant == null) {
			variant = new Variant();
		}

		return variant;
	}
	
	public String getString(String name) {
		Variant variant = getVariant(name);
		return variant.getStringValue();
	}

	public int getInt(String name, int defaultValue) {
		Variant variant = getVariant(name);
		return variant.getIntValue(defaultValue);
	}

	@Override
	public String getFilterValue() {
		return getString("filter");
	}
	
	@Override
	public Iterator<DataCell> iterator() {
		return cellList.iterator();
	}

	@Override
	public List<String> getDataNameList() {
		return lowerNameList;
	}

	@Override
	public boolean containsData(String name) {
		if (name == null) {
			return false;
		}
		
		name = name.toLowerCase();
		
		return valueMap.containsKey(name);
	}

	@Override
	public Object getDataValue(String name) {
		if (name == null) {
			return null;
		}
		
		name = name.toLowerCase();
		
		Variant variant = valueMap.get(name);
		
		if (variant == null) {
			return null;
		}
		
		return variant.getValue();
	}
}