/******************************************************************************
 *  Copyright 2015 by OLTPBenchmark Project                                   *
 *                                                                            *
 *  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 com.oltpbenchmark.benchmarks.wikipedia.procedures;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;

import com.oltpbenchmark.api.Procedure;
import com.oltpbenchmark.api.SQLStmt;
import com.oltpbenchmark.benchmarks.wikipedia.WikipediaConstants;
import com.oltpbenchmark.util.TimeUtil;

public class RemoveWatchList extends Procedure {
	
	public SQLStmt removeWatchList = new SQLStmt(
        "DELETE FROM " + WikipediaConstants.TABLENAME_WATCHLIST +
        " WHERE wl_user = ? AND wl_namespace = ? AND wl_title = ?"
    );
    public SQLStmt setUserTouched = new SQLStmt(
        "UPDATE " + WikipediaConstants.TABLENAME_USER +
        "   SET user_touched = ? " +
        " WHERE user_id =  ? "
    ); 

    public void run(Connection conn, int userId, int nameSpace, String pageTitle) throws SQLException {

        if (userId > 0) {
            PreparedStatement ps = this.getPreparedStatement(conn, removeWatchList);
            ps.setInt(1, userId);
            ps.setInt(2, nameSpace);
            ps.setString(3, pageTitle);
            ps.executeUpdate();

            if (nameSpace == 0) {
                // if regular page, also remove a line of
                // watchlist for the corresponding talk page
                ps = this.getPreparedStatement(conn, removeWatchList);
                ps.setInt(1, userId);
                ps.setInt(2, 1);
                ps.setString(3, pageTitle);
                ps.executeUpdate();
            }

            ps = this.getPreparedStatement(conn, setUserTouched);
            ps.setString(1, TimeUtil.getCurrentTimeString14());
            ps.setInt(2, userId);
            ps.executeUpdate();
        }
    }
}
