/*
    * 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.shardingsphere.driver.jdbc.core.resultset;
  
  import lombok.Getter;
  import org.apache.shardingsphere.driver.jdbc.adapter.AbstractResultSetAdapter;
  import org.apache.shardingsphere.infra.annotation.HighFrequencyInvocation;
  import org.apache.shardingsphere.infra.binder.context.statement.SQLStatementContext;
  import org.apache.shardingsphere.infra.exception.core.ShardingSpherePreconditions;
  import org.apache.shardingsphere.infra.executor.sql.execute.result.query.impl.driver.jdbc.type.util.ResultSetUtils;
  import org.apache.shardingsphere.infra.merge.result.MergedResult;
  
  import java.io.InputStream;
  import java.io.Reader;
  import java.math.BigDecimal;
  import java.math.BigInteger;
  import java.net.URL;
  import java.sql.Array;
  import java.sql.Blob;
  import java.sql.Clob;
  import java.sql.Date;
  import java.sql.ResultSet;
  import java.sql.SQLException;
  import java.sql.SQLFeatureNotSupportedException;
  import java.sql.SQLXML;
  import java.sql.Statement;
  import java.sql.Time;
  import java.sql.Timestamp;
  import java.time.LocalDate;
  import java.time.LocalDateTime;
  import java.time.LocalTime;
  import java.time.OffsetDateTime;
  import java.util.Calendar;
  import java.util.List;
  import java.util.Map;
  
  /**
   * ShardingSphere result set.
   */
  @HighFrequencyInvocation
  public final class ShardingSphereResultSet extends AbstractResultSetAdapter {
      
      private static final String ASCII = "Ascii";
      
      private static final String UNICODE = "Unicode";
      
      private static final String BINARY = "Binary";
      
      private final MergedResult mergeResultSet;
      
      @Getter
      private final Map<String, Integer> columnLabelAndIndexMap;
      
      public ShardingSphereResultSet(final List<ResultSet> resultSets, final MergedResult mergeResultSet, final Statement statement, final SQLStatementContext sqlStatementContext) throws SQLException {
          super(resultSets, statement, sqlStatementContext);
          this.mergeResultSet = mergeResultSet;
          columnLabelAndIndexMap = ShardingSphereResultSetUtils.createColumnLabelAndIndexMap(sqlStatementContext, resultSets.get(0).getMetaData());
      }
      
      public ShardingSphereResultSet(final List<ResultSet> resultSets, final MergedResult mergeResultSet, final Statement statement,
                                     final SQLStatementContext sqlStatementContext, final Map<String, Integer> columnLabelAndIndexMap) {
          super(resultSets, statement, sqlStatementContext);
          this.mergeResultSet = mergeResultSet;
          this.columnLabelAndIndexMap = columnLabelAndIndexMap;
      }
      
      @Override
      public boolean next() throws SQLException {
          return mergeResultSet.next();
      }
      
      @Override
      public boolean wasNull() throws SQLException {
          return mergeResultSet.wasNull();
      }
      
      @Override
      public boolean getBoolean(final int columnIndex) throws SQLException {
          return (boolean) ResultSetUtils.convertValue(mergeResultSet.getValue(columnIndex, boolean.class), boolean.class);
      }
      
      @Override
      public boolean getBoolean(final String columnLabel) throws SQLException {
          return getBoolean(getIndexFromColumnLabelAndIndexMap(columnLabel));
     }
     
     @Override
     public byte getByte(final int columnIndex) throws SQLException {
         return (byte) ResultSetUtils.convertValue(mergeResultSet.getValue(columnIndex, byte.class), byte.class);
     }
     
     @Override
     public byte getByte(final String columnLabel) throws SQLException {
         return getByte(getIndexFromColumnLabelAndIndexMap(columnLabel));
     }
     
     @Override
     public short getShort(final int columnIndex) throws SQLException {
         return (short) ResultSetUtils.convertValue(mergeResultSet.getValue(columnIndex, short.class), short.class);
     }
     
     @Override
     public short getShort(final String columnLabel) throws SQLException {
         return getShort(getIndexFromColumnLabelAndIndexMap(columnLabel));
     }
     
     @Override
     public int getInt(final int columnIndex) throws SQLException {
         return (int) ResultSetUtils.convertValue(mergeResultSet.getValue(columnIndex, int.class), int.class);
     }
     
     @Override
     public int getInt(final String columnLabel) throws SQLException {
         return getInt(getIndexFromColumnLabelAndIndexMap(columnLabel));
     }
     
     @Override
     public long getLong(final int columnIndex) throws SQLException {
         return (long) ResultSetUtils.convertValue(mergeResultSet.getValue(columnIndex, long.class), long.class);
     }
     
     @Override
     public long getLong(final String columnLabel) throws SQLException {
         return getLong(getIndexFromColumnLabelAndIndexMap(columnLabel));
     }
     
     @Override
     public float getFloat(final int columnIndex) throws SQLException {
         return (float) ResultSetUtils.convertValue(mergeResultSet.getValue(columnIndex, float.class), float.class);
     }
     
     @Override
     public float getFloat(final String columnLabel) throws SQLException {
         return getFloat(getIndexFromColumnLabelAndIndexMap(columnLabel));
     }
     
     @Override
     public double getDouble(final int columnIndex) throws SQLException {
         return (double) ResultSetUtils.convertValue(mergeResultSet.getValue(columnIndex, double.class), double.class);
     }
     
     @Override
     public double getDouble(final String columnLabel) throws SQLException {
         return getDouble(getIndexFromColumnLabelAndIndexMap(columnLabel));
     }
     
     @Override
     public String getString(final int columnIndex) throws SQLException {
         return (String) ResultSetUtils.convertValue(mergeResultSet.getValue(columnIndex, String.class), String.class);
     }
     
     @Override
     public String getString(final String columnLabel) throws SQLException {
         return getString(getIndexFromColumnLabelAndIndexMap(columnLabel));
     }
     
     @Override
     public String getNString(final int columnIndex) throws SQLException {
         return getString(columnIndex);
     }
     
     @Override
     public String getNString(final String columnLabel) throws SQLException {
         return getString(columnLabel);
     }
     
     @Override
     public BigDecimal getBigDecimal(final int columnIndex) throws SQLException {
         return (BigDecimal) ResultSetUtils.convertValue(mergeResultSet.getValue(columnIndex, BigDecimal.class), BigDecimal.class);
     }
     
     @Override
     public BigDecimal getBigDecimal(final String columnLabel) throws SQLException {
         return getBigDecimal(getIndexFromColumnLabelAndIndexMap(columnLabel));
     }
     
     @Override
     public BigDecimal getBigDecimal(final int columnIndex, final int scale) throws SQLException {
         return (BigDecimal) ResultSetUtils.convertValue(mergeResultSet.getValue(columnIndex, BigDecimal.class), BigDecimal.class);
     }
     
     @Override
     public BigDecimal getBigDecimal(final String columnLabel, final int scale) throws SQLException {
         return getBigDecimal(getIndexFromColumnLabelAndIndexMap(columnLabel));
     }
     
     @Override
     public byte[] getBytes(final int columnIndex) throws SQLException {
         return (byte[]) ResultSetUtils.convertValue(mergeResultSet.getValue(columnIndex, byte[].class), byte[].class);
     }
     
     @Override
     public byte[] getBytes(final String columnLabel) throws SQLException {
         return getBytes(getIndexFromColumnLabelAndIndexMap(columnLabel));
     }
     
     @Override
     public Date getDate(final int columnIndex) throws SQLException {
         return (Date) ResultSetUtils.convertValue(mergeResultSet.getValue(columnIndex, Date.class), Date.class);
     }
     
     @Override
     public Date getDate(final String columnLabel) throws SQLException {
         return getDate(getIndexFromColumnLabelAndIndexMap(columnLabel));
     }
     
     @Override
     public Date getDate(final int columnIndex, final Calendar cal) throws SQLException {
         return (Date) ResultSetUtils.convertValue(mergeResultSet.getCalendarValue(columnIndex, Date.class, cal), Date.class);
     }
     
     @Override
     public Date getDate(final String columnLabel, final Calendar cal) throws SQLException {
         return getDate(getIndexFromColumnLabelAndIndexMap(columnLabel), cal);
     }
     
     @Override
     public Time getTime(final int columnIndex) throws SQLException {
         return (Time) ResultSetUtils.convertValue(mergeResultSet.getValue(columnIndex, Time.class), Time.class);
     }
     
     @Override
     public Time getTime(final String columnLabel) throws SQLException {
         return getTime(getIndexFromColumnLabelAndIndexMap(columnLabel));
     }
     
     @Override
     public Time getTime(final int columnIndex, final Calendar cal) throws SQLException {
         return (Time) ResultSetUtils.convertValue(mergeResultSet.getCalendarValue(columnIndex, Time.class, cal), Time.class);
     }
     
     @Override
     public Time getTime(final String columnLabel, final Calendar cal) throws SQLException {
         return getTime(getIndexFromColumnLabelAndIndexMap(columnLabel), cal);
     }
     
     @Override
     public Timestamp getTimestamp(final int columnIndex) throws SQLException {
         return (Timestamp) ResultSetUtils.convertValue(mergeResultSet.getValue(columnIndex, Timestamp.class), Timestamp.class);
     }
     
     @Override
     public Timestamp getTimestamp(final String columnLabel) throws SQLException {
         return getTimestamp(getIndexFromColumnLabelAndIndexMap(columnLabel));
     }
     
     @Override
     public Timestamp getTimestamp(final int columnIndex, final Calendar cal) throws SQLException {
         return (Timestamp) ResultSetUtils.convertValue(mergeResultSet.getCalendarValue(columnIndex, Timestamp.class, cal), Timestamp.class);
     }
     
     @Override
     public Timestamp getTimestamp(final String columnLabel, final Calendar cal) throws SQLException {
         return getTimestamp(getIndexFromColumnLabelAndIndexMap(columnLabel), cal);
     }
     
     @Override
     public InputStream getAsciiStream(final int columnIndex) throws SQLException {
         return mergeResultSet.getInputStream(columnIndex, ASCII);
     }
     
     @Override
     public InputStream getAsciiStream(final String columnLabel) throws SQLException {
         return getAsciiStream(getIndexFromColumnLabelAndIndexMap(columnLabel));
     }
     
     @Override
     public InputStream getUnicodeStream(final int columnIndex) throws SQLException {
         return mergeResultSet.getInputStream(columnIndex, UNICODE);
     }
     
     @Override
     public InputStream getUnicodeStream(final String columnLabel) throws SQLException {
         return getUnicodeStream(getIndexFromColumnLabelAndIndexMap(columnLabel));
     }
     
     @Override
     public InputStream getBinaryStream(final int columnIndex) throws SQLException {
         return mergeResultSet.getInputStream(columnIndex, BINARY);
     }
     
     @Override
     public InputStream getBinaryStream(final String columnLabel) throws SQLException {
         return getBinaryStream(getIndexFromColumnLabelAndIndexMap(columnLabel));
     }
     
     @Override
     public Reader getCharacterStream(final int columnIndex) throws SQLException {
         // TODO To be supported: encrypt, mask, and so on
         return mergeResultSet.getCharacterStream(columnIndex);
     }
     
     @Override
     public Reader getCharacterStream(final String columnLabel) throws SQLException {
         return getCharacterStream(getIndexFromColumnLabelAndIndexMap(columnLabel));
     }
     
     @Override
     public Blob getBlob(final int columnIndex) throws SQLException {
         return (Blob) mergeResultSet.getValue(columnIndex, Blob.class);
     }
     
     @Override
     public Blob getBlob(final String columnLabel) throws SQLException {
         return getBlob(getIndexFromColumnLabelAndIndexMap(columnLabel));
     }
     
     @Override
     public Clob getClob(final int columnIndex) throws SQLException {
         return (Clob) mergeResultSet.getValue(columnIndex, Clob.class);
     }
     
     @Override
     public Clob getClob(final String columnLabel) throws SQLException {
         return getClob(getIndexFromColumnLabelAndIndexMap(columnLabel));
     }
     
     @Override
     public Array getArray(final int columnIndex) throws SQLException {
         return (Array) mergeResultSet.getValue(columnIndex, Array.class);
     }
     
     @Override
     public Array getArray(final String columnLabel) throws SQLException {
         return getArray(getIndexFromColumnLabelAndIndexMap(columnLabel));
     }
     
     @Override
     public URL getURL(final int columnIndex) throws SQLException {
         return (URL) mergeResultSet.getValue(columnIndex, URL.class);
     }
     
     @Override
     public URL getURL(final String columnLabel) throws SQLException {
         return getURL(getIndexFromColumnLabelAndIndexMap(columnLabel));
     }
     
     @Override
     public SQLXML getSQLXML(final int columnIndex) throws SQLException {
         return (SQLXML) mergeResultSet.getValue(columnIndex, SQLXML.class);
     }
     
     @Override
     public SQLXML getSQLXML(final String columnLabel) throws SQLException {
         return getSQLXML(getIndexFromColumnLabelAndIndexMap(columnLabel));
     }
     
     @Override
     public Object getObject(final int columnIndex) throws SQLException {
         return mergeResultSet.getValue(columnIndex, Object.class);
     }
     
     @Override
     public Object getObject(final String columnLabel) throws SQLException {
         return getObject(getIndexFromColumnLabelAndIndexMap(columnLabel));
     }
     
     @SuppressWarnings("unchecked")
     @Override
     public <T> T getObject(final int columnIndex, final Class<T> type) throws SQLException {
         if (BigInteger.class.equals(type)) {
             return (T) BigInteger.valueOf(getLong(columnIndex));
         }
         if (Blob.class.equals(type)) {
             return (T) getBlob(columnIndex);
         }
         if (Clob.class.equals(type)) {
             return (T) getClob(columnIndex);
         }
         if (LocalDateTime.class.equals(type) || LocalDate.class.equals(type) || LocalTime.class.equals(type) || OffsetDateTime.class.equals(type)) {
             return (T) ResultSetUtils.convertValue(mergeResultSet.getValue(columnIndex, Timestamp.class), type);
         }
         return (T) ResultSetUtils.convertValue(mergeResultSet.getValue(columnIndex, type), type);
     }
     
     @Override
     public <T> T getObject(final String columnLabel, final Class<T> type) throws SQLException {
         return getObject(getIndexFromColumnLabelAndIndexMap(columnLabel), type);
     }
     
     private Integer getIndexFromColumnLabelAndIndexMap(final String columnLabel) throws SQLException {
         Integer result = columnLabelAndIndexMap.get(columnLabel);
         ShardingSpherePreconditions.checkNotNull(result, () -> new SQLFeatureNotSupportedException(String.format("Can not get index from column label `%s`.", columnLabel)));
         return result;
     }
 }