package foundation.io.engine;

import java.util.HashMap;

import foundation.data.entity.Entity;
import foundation.util.Util;

public class LineValueTrigger {

	private TriggerEvent triggerName;
	private String[] columnNames;
	private int[] columnIndexes;
	private int columnCount;
	private HashMap<String , String> values;
	
	public LineValueTrigger() {
		values = new HashMap<String , String>();
	}
	
	public void onReadLine(Entity entity) {
		int columnIndex;
		String columnName, key = "";
		
		for (int i = 0 ; i < columnNames.length; i++) {
			columnIndex = columnIndexes[i];
			columnName = columnNames[i];
			
			if (columnIndex < 0) {
				columnIndex = entity.getFieldsMeta().getIndex(columnName);
			}
			
			key = key + "-" + entity.getString(columnIndex, "Null-Value");
		}
		
		if (values.containsKey(key)) {
			entity.set(triggerName.getFieldName(), values.get(key));
			return;
		}

		String newValue = triggerName.notifyReadNewValue(triggerName, entity, key);
		
		values.put(key, newValue);
	}

	public void load(Entity entity) {
		columnNames = entity.getString("column_name").split(",");
		columnCount = columnNames.length;
		
		columnIndexes =  new int[columnCount];
		String columnIndexStr = entity.getString("column_index", "");
		String[] indexes = columnIndexStr.split(",");
		boolean isIndexsEmpty = Util.isEmpty(columnIndexStr);
		
		for (int i = 0; i < columnCount; i++) {
			columnIndexes[i] = isIndexsEmpty ? -1 : Integer.parseInt(indexes[i]);
		}
		
		triggerName = new TriggerEvent();
		triggerName.setTriggerName(entity.getString("name"));
		triggerName.setColumnIndexes(columnIndexes);
		triggerName.setColumnNames(columnNames);
		triggerName.setField(entity.getString("field_name"));
		triggerName.setRemark(entity.getString("remark"));
	}

	public String getTriggerName() {
		return triggerName.getTriggerName();
	}
}