/*
 * Copyright (c) 2011-2015 EPFL DATA Laboratory
 * Copyright (c) 2014-2015 The Squall Collaboration (see NOTICE)
 *
 * All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package ch.epfl.data.squall.examples.imperative.theta;

import java.util.Arrays;
import java.util.List;
import java.util.Map;

import org.apache.log4j.Logger;

import ch.epfl.data.squall.components.Component;
import ch.epfl.data.squall.components.DataSourceComponent;
import ch.epfl.data.squall.components.theta.ThetaJoinComponentFactory;
import ch.epfl.data.squall.expressions.ColumnReference;
import ch.epfl.data.squall.expressions.Multiplication;
import ch.epfl.data.squall.expressions.Subtraction;
import ch.epfl.data.squall.expressions.ValueExpression;
import ch.epfl.data.squall.expressions.ValueSpecification;
import ch.epfl.data.squall.operators.AggregateOperator;
import ch.epfl.data.squall.operators.AggregateSumOperator;
import ch.epfl.data.squall.operators.ProjectOperator;
import ch.epfl.data.squall.predicates.AndPredicate;
import ch.epfl.data.squall.predicates.ComparisonPredicate;
import ch.epfl.data.squall.query_plans.QueryBuilder;
import ch.epfl.data.squall.query_plans.QueryPlan;
import ch.epfl.data.squall.query_plans.ThetaQueryPlansParameters;
import ch.epfl.data.squall.types.DoubleType;
import ch.epfl.data.squall.types.IntegerType;
import ch.epfl.data.squall.types.NumericType;

public class ThetaInputDominatedPlan extends QueryPlan {

    private static Logger LOG = Logger.getLogger(ThetaInputDominatedPlan.class);

    private final QueryBuilder _queryBuilder = new QueryBuilder();

    private static final NumericType<Double> _doubleConv = new DoubleType();
    private static final IntegerType _ic = new IntegerType();

    /*
     * SELECT SUM(LINEITEM.EXTENDEDPRICE*(1-LINEITEM.DISCOUNT)) FROM LINEITEM,
     * ORDERS WHERE LINEITEM.ORDERKEY = ORDERS.ORDERKEY AND ORDERS.TOTALPRICE >
     * 10*LINEITEM.EXTENDEDPRICE
     */
    public ThetaInputDominatedPlan(String dataPath, String extension, Map conf) {
	final int Theta_JoinType = ThetaQueryPlansParameters
		.getThetaJoinType(conf);
	// -------------------------------------------------------------------------------------
	final List<Integer> hashLineitem = Arrays.asList(0);

	final ProjectOperator projectionLineitem = new ProjectOperator(
		new int[] { 0, 5, 6 });

	final DataSourceComponent relationLineitem = new DataSourceComponent(
		"LINEITEM", dataPath + "lineitem" + extension)
		.setOutputPartKey(hashLineitem).add(projectionLineitem);
	_queryBuilder.add(relationLineitem);

	// -------------------------------------------------------------------------------------
	final List<Integer> hashOrders = Arrays.asList(1);

	final ProjectOperator projectionOrders = new ProjectOperator(new int[] {
		0, 3 });

	final DataSourceComponent relationOrders = new DataSourceComponent(
		"ORDERS", dataPath + "orders" + extension).setOutputPartKey(
		hashOrders).add(projectionOrders);
	_queryBuilder.add(relationOrders);

	// -------------------------------------------------------------------------------------

	// set up aggregation function on the StormComponent(Bolt) where join is
	// performed
	// 1 - discount
	final ValueExpression<Double> substract = new Subtraction(
		new ValueSpecification(_doubleConv, 1.0), new ColumnReference(
			_doubleConv, 1));
	// extendedPrice*(1-discount)
	final ValueExpression<Double> product = new Multiplication(
		new ColumnReference(_doubleConv, 0), substract);
	final AggregateOperator agg = new AggregateSumOperator(product, conf);

	// /Join predicate
	final ColumnReference colLineItems = new ColumnReference(_ic, 0);
	final ColumnReference colOrders = new ColumnReference(_ic, 0);
	final ComparisonPredicate pred1 = new ComparisonPredicate(
		ComparisonPredicate.EQUAL_OP, colLineItems, colOrders);

	final ValueSpecification value10 = new ValueSpecification(_doubleConv,
		10.0);
	final ColumnReference colLineItemsInequality = new ColumnReference(
		_doubleConv, 1);
	final Multiplication mult = new Multiplication(value10,
		colLineItemsInequality);
	final ColumnReference colOrdersInequality = new ColumnReference(
		_doubleConv, 1);
	final ComparisonPredicate pred2 = new ComparisonPredicate(
		ComparisonPredicate.LESS_OP, mult, colOrdersInequality);

	final AndPredicate overallPred = new AndPredicate(pred1, pred2);

	Component lastJoiner = ThetaJoinComponentFactory
		.createThetaJoinOperator(Theta_JoinType, relationLineitem,
			relationOrders, _queryBuilder)
		.setJoinPredicate(overallPred)
		.add(new ProjectOperator(new int[] { 1, 2, 4 })).add(agg);
	;

	// lastJoiner.setPrintOut(false);
	// -------------------------------------------------------------------------------------

    }

    @Override
    public QueryBuilder getQueryPlan() {
	return _queryBuilder;
    }
}