package foundation.ai;

import java.io.File;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import foundation.util.MapList;

public class AICenter {

	private static Logger logger;
	private static AICenter instance;
	private static MapList<String, AIProvider> providers;
	private static ActionBucket actionBucket;
	
	static {
		logger = LogManager.getLogger(AICenter.class);
		providers = new MapList<String, AIProvider>();
		actionBucket = new ActionBucket();
		instance = createInstance();
	}
	
	private AICenter() {
		
	}
	
	public static AICenter createInstance() {
		return new AICenter();
	}
	
	public synchronized static AICenter getInstance() {
		if (instance == null) {
			instance = createInstance();
		}
		
		return instance;
	}
	
	public static OCRResult execOCR(Operator operator, File file) throws Exception {
		if (Operator.NotKnown == operator) {
			return null;
		}
		
		Action action = actionBucket.get(operator);
		
		if (action == null) {
			logger.error("can find action: {}", operator.toChinese());
			return null;
		}
		
		return action.exec(file);
	}
	
	public static OCRResult execOCR(Operator operator, Object paramObject) throws Exception {
		if (Operator.NotKnown == operator) {
			return null;
		}
		
		Action action = actionBucket.get(operator);
		
		if (action == null) {
			logger.error("can find action: {}", operator.toChinese());
			return null;
		}
		
		return action.exec(paramObject);
	}	
	
	public static void execOCR(String code, File file) throws Exception {
		Operator operator = Operator.parse(code);
		execOCR(operator, file);
	}
	
	public void activate() {
		AICenter.instance = this;
	}

	public static void registerOneAction(Operator operator, AIProvider provider) {
		Action action = new Action(operator, provider);
		actionBucket.loadOneAction(operator, action);
	}

	public void addOneProvider(AIProvider provider) {
		providers.add(provider.getName(), provider);
	}
	
}