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package net.sf.aguacate.function.spi.impl;

import java.util.Collection;
import java.util.List;
import java.util.Map;

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

import net.sf.aguacate.function.Function;
import net.sf.aguacate.function.FunctionContext;
import net.sf.aguacate.function.FunctionEvalResult;
import net.sf.aguacate.function.spi.AbstractFunction1;
import net.sf.aguacate.util.parameter.Parameter;
import net.sf.aguacate.util.type.Str;

/**
 *  * {
 *  "name": "...",
 *  "message": "...",
 *  "type" : "STRUCTURE_ARRAY_ITERATOR",
 *  "parameters" : [
 *   ...
 *  ],
 *  "validations": [
 *   ...
 *  ],
 *  "methods": [
 *   ...
 *  ]
 * }
 * 
 */
public class FunctionArrayIterator extends AbstractFunction1 {

	private static final Logger LOGGER = LogManager.getLogger(FunctionArrayIterator.class);

	private final String[] outputContext;

	private final String outputName;

	private final Function[] functions;

	public FunctionArrayIterator(Collection methods, String name, String message, Parameter parameter,
			List outputContext, String outputName, List list) {
		super(methods, name, message, parameter);
		this.outputContext = Str.toArray(outputContext);
		this.outputName = outputName;
		this.functions = list.toArray(new Function[list.size()]);
	}

	@Override
	public FunctionEvalResult evaluate(FunctionContext functionContext, String msg, Object value) {
		@SuppressWarnings("unchecked")
		List> data = (List>) value;
		int size = data.size();
		for (int i = 0; i < size; i++) {
			Map subcontext = data.get(i);
			LOGGER.trace("before subcontext: {}", subcontext);
			for (Function function : functions) {
				FunctionEvalResult result = function.evaluate(functionContext, subcontext);
				if (result.isSuccess()) {
					String outputName = function.getOutputName();
					if (outputName != null) {
						subcontext.put(outputName, result.getData());
					}
				} else {
					return result;
				}
				LOGGER.trace("in subcontext: {}", subcontext);
			}
			LOGGER.trace("after subcontext: {}", subcontext);
		}
		return new FunctionEvalResult(null, null);
	}

	@Override
	public String getOutputName() {
		return outputName;
	}

	@Override
	public String[] getOutputContext() {
		return outputContext;
	}

}