/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.phoenix.end2end;

import static org.apache.phoenix.util.TestUtil.closeStmtAndConn;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

import java.math.BigDecimal;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import org.apache.phoenix.expression.function.SignFunction;
import org.junit.Before;
import org.junit.Test;
import org.junit.experimental.categories.Category;

/**
 * End to end tests for {@link SignFunction}
 * @since 4.0.0
 */
@Category(ParallelStatsDisabledTest.class)
public class SignFunctionEnd2EndIT extends ParallelStatsDisabledIT {

  private static final String KEY = "key";
  private String signedTableName;
  private String unsignedTableName;

  @Before
  public void initTable() throws Exception {
    signedTableName = generateUniqueName();
    unsignedTableName = generateUniqueName();
    Connection conn = null;
    PreparedStatement stmt = null;
    try {
      conn = DriverManager.getConnection(getUrl());
      String ddl;
      ddl = "CREATE TABLE " + signedTableName
        + " (k VARCHAR NOT NULL PRIMARY KEY, \"DEC\" DECIMAL, doub DOUBLE, fl FLOAT, inte INTEGER, lon BIGINT, smalli SMALLINT, tinyi TINYINT)";
      conn.createStatement().execute(ddl);
      ddl = "CREATE TABLE " + unsignedTableName
        + " (k VARCHAR NOT NULL PRIMARY KEY, doub UNSIGNED_DOUBLE, fl UNSIGNED_FLOAT, inte UNSIGNED_INT, lon UNSIGNED_LONG, smalli UNSIGNED_SMALLINT, tinyi UNSIGNED_TINYINT)";
      conn.createStatement().execute(ddl);
      conn.commit();
    } finally {
      closeStmtAndConn(stmt, conn);
    }
  }

  private void updateSignedTable(Connection conn, double data) throws Exception {
    PreparedStatement stmt =
      conn.prepareStatement("UPSERT INTO " + signedTableName + " VALUES (?, ?, ?, ?, ?, ?, ?, ?)");
    stmt.setString(1, KEY);
    Double d = Double.valueOf(data);
    stmt.setBigDecimal(2, BigDecimal.valueOf(data));
    stmt.setDouble(3, d.doubleValue());
    stmt.setFloat(4, d.floatValue());
    stmt.setInt(5, d.intValue());
    stmt.setLong(6, d.longValue());
    stmt.setShort(7, d.shortValue());
    stmt.setByte(8, d.byteValue());
    stmt.executeUpdate();
    conn.commit();
  }

  private void updateUnsignedTable(Connection conn, double data) throws Exception {
    PreparedStatement stmt =
      conn.prepareStatement("UPSERT INTO " + unsignedTableName + " VALUES (?, ?, ?, ?, ?, ?, ?)");
    stmt.setString(1, KEY);
    Double d = Double.valueOf(data);
    stmt.setDouble(2, d.doubleValue());
    stmt.setFloat(3, d.floatValue());
    stmt.setInt(4, d.intValue());
    stmt.setLong(5, d.longValue());
    stmt.setShort(6, d.shortValue());
    stmt.setByte(7, d.byteValue());
    stmt.executeUpdate();
    conn.commit();
  }

  private void testSignedNumberSpec(Connection conn, double data, int expected) throws Exception {
    updateSignedTable(conn, data);
    ResultSet rs = conn.createStatement().executeQuery(
      "SELECT SIGN(\"DEC\"),SIGN(doub),SIGN(fl),SIGN(inte),SIGN(lon),SIGN(smalli),SIGN(tinyi) FROM "
        + signedTableName);
    assertTrue(rs.next());
    for (int i = 1; i <= 7; ++i) {
      assertEquals(rs.getInt(i), expected);
    }
    assertTrue(!rs.next());

    PreparedStatement stmt = conn.prepareStatement("SELECT k FROM " + signedTableName
      + " WHERE SIGN(\"DEC\")=? AND SIGN(doub)=? AND SIGN(fl)=? AND SIGN(inte)=? AND SIGN(lon)=? AND SIGN(smalli)=? AND SIGN(tinyi)=?");
    for (int i = 1; i <= 7; ++i)
      stmt.setInt(i, expected);
    rs = stmt.executeQuery();
    assertTrue(rs.next());
    assertEquals(KEY, rs.getString(1));
    assertTrue(!rs.next());
  }

  private void testUnsignedNumberSpec(Connection conn, double data, int expected) throws Exception {
    updateUnsignedTable(conn, data);
    ResultSet rs = conn.createStatement()
      .executeQuery("SELECT SIGN(doub),SIGN(fl),SIGN(inte),SIGN(lon),SIGN(smalli),SIGN(tinyi) FROM "
        + unsignedTableName);
    assertTrue(rs.next());
    for (int i = 1; i <= 6; ++i) {
      assertEquals(rs.getInt(i), expected);
    }
    assertTrue(!rs.next());

    PreparedStatement stmt = conn.prepareStatement("SELECT k FROM " + unsignedTableName
      + " WHERE SIGN(doub)=? AND SIGN(fl)=? AND SIGN(inte)=? AND SIGN(lon)=? AND SIGN(smalli)=? AND SIGN(tinyi)=?");
    for (int i = 1; i <= 6; ++i)
      stmt.setInt(i, expected);
    rs = stmt.executeQuery();
    assertTrue(rs.next());
    assertEquals(KEY, rs.getString(1));
    assertTrue(!rs.next());
  }

  @Test
  public void testSignedNumber() throws Exception {
    Connection conn = DriverManager.getConnection(getUrl());
    testSignedNumberSpec(conn, 0.0, 0);
    testSignedNumberSpec(conn, 1.0, 1);
    testSignedNumberSpec(conn, -1.0, -1);
    testSignedNumberSpec(conn, 123.1234, 1);
    testSignedNumberSpec(conn, -123.1234, -1);
  }

  @Test
  public void testUnsignedNumber() throws Exception {
    Connection conn = DriverManager.getConnection(getUrl());
    testUnsignedNumberSpec(conn, 0.0, 0);
    testUnsignedNumberSpec(conn, 1.0, 1);
    testUnsignedNumberSpec(conn, 123.1234, 1);
  }
}
