/**
 * Licensed to JumpMind Inc under one or more contributor
 * license agreements.  See the NOTICE file distributed
 * with this work for additional information regarding
 * copyright ownership.  JumpMind Inc licenses this file
 * to you under the GNU General Public License, version 3.0 (GPLv3)
 * (the "License"); you may not use this file except in compliance
 * with the License.
 *
 * You should have received a copy of the GNU General Public License,
 * version 3.0 (GPLv3) along with this library; if not, see
 * <http://www.gnu.org/licenses/>.
 *
 * 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.jumpmind.symmetric.db.oracle;

import java.util.HashMap;

import org.apache.commons.lang.StringUtils;
import org.jumpmind.symmetric.common.ParameterConstants;
import org.jumpmind.symmetric.db.AbstractTriggerTemplate;
import org.jumpmind.symmetric.db.ISymmetricDialect;

public class OracleTriggerTemplate extends AbstractTriggerTemplate {

    public OracleTriggerTemplate(ISymmetricDialect symmetricDialect) {
        super(symmetricDialect);
        // @formatter:off

        emptyColumnTemplate = "''" ;
        stringColumnTemplate = "decode($(tableAlias).\"$(columnName)\", null, $(oracleToClob)'', '\"'||replace(replace($(oracleToClob)$(tableAlias).\"$(columnName)\",'\\','\\\\'),'\"','\\\"')||'\"')" ;
        geometryColumnTemplate = "case when $(tableAlias).\"$(columnName)\" is null then to_clob('') else '\"'||replace(replace(SDO_UTIL.TO_WKTGEOMETRY($(tableAlias).\"$(columnName)\"),'\\','\\\\'),'\"','\\\"')||'\"' end";
        numberColumnTemplate = "decode($(tableAlias).\"$(columnName)\", null, '', '\"'||cast($(tableAlias).\"$(columnName)\" as number("+symmetricDialect.getTemplateNumberPrecisionSpec()+"))||'\"')" ;
        datetimeColumnTemplate = "decode($(tableAlias).\"$(columnName)\", null, '', concat(concat('\"',to_char($(tableAlias).\"$(columnName)\", 'YYYY-MM-DD HH24:MI:SS.FF9')),'\"'))" ;
        dateTimeWithTimeZoneColumnTemplate = "decode($(tableAlias).\"$(columnName)\", null, '', concat(concat('\"',to_char($(tableAlias).\"$(columnName)\", 'YYYY-MM-DD HH24:MI:SS.FF9 TZH:TZM')),'\"'))" ;
        dateTimeWithLocalTimeZoneColumnTemplate = "decode($(tableAlias).\"$(columnName)\", null, '', concat(concat('\"',to_char(cast($(tableAlias).\"$(columnName)\" as timestamp), 'YYYY-MM-DD HH24:MI:SS.FF9')),'\"'))" ;
        timeColumnTemplate = "decode($(tableAlias).\"$(columnName)\", null, '', concat(concat('\"',to_char($(tableAlias).\"$(columnName)\", 'YYYY-MM-DD HH24:MI:SS','NLS_CALENDAR=''GREGORIAN''')),'\"'))" ;
        dateColumnTemplate = "decode($(tableAlias).\"$(columnName)\", null, '', concat(concat('\"',to_char($(tableAlias).\"$(columnName)\", 'YYYY-MM-DD HH24:MI:SS','NLS_CALENDAR=''GREGORIAN''')),'\"'))" ;
        clobColumnTemplate = "decode(dbms_lob.getlength(to_clob($(tableAlias).\"$(columnName)\")), null, to_clob(''), '\"'||replace(replace($(tableAlias).\"$(columnName)\",'\\','\\\\'),'\"','\\\"')||'\"')" ;
        blobColumnTemplate = "decode(dbms_lob.getlength($(tableAlias).\"$(columnName)\"), null, to_clob(''), '\"'||$(prefixName)_blob2clob($(tableAlias).\"$(columnName)\")||'\"')" ;
        booleanColumnTemplate = "decode($(tableAlias).\"$(columnName)\", null, '', '\"'||cast($(tableAlias).\"$(columnName)\" as number("+symmetricDialect.getTemplateNumberPrecisionSpec()+"))||'\"')" ;
        xmlColumnTemplate = "decode(dbms_lob.getlength($(tableAlias).\"$(columnName)\".getclobval()), null, to_clob(''), '\"'||replace(replace($(tableAlias).\"$(columnName)\".getclobval(),'\\','\\\\'),'\"','\\\"')||'\"')" ;
        triggerConcatCharacter = "||" ;
        newTriggerValue = ":new" ;
        oldTriggerValue = ":old" ;
        oldColumnPrefix = "" ;
        newColumnPrefix = "" ;

        sqlTemplates = new HashMap<String,String>();
        sqlTemplates.put("insertTriggerTemplate" ,
"create or replace trigger $(triggerName)                                                 \n" +
"    after insert on $(schemaName)$(tableName)                                            \n" +
"        for each row begin                                                               \n" +
"            $(custom_before_insert_text) \n" +
"            if $(syncOnInsertCondition) and $(syncOnIncomingBatchCondition) then         \n" +
"                insert into $(defaultSchema)$(prefixName)_data                           \n" +
"                  (table_name, event_type, trigger_hist_id, row_data, channel_id,        \n" +
"                  transaction_id, source_node_id, external_data, create_time)            \n" +
"                  values(                                                                \n" +
"                  '$(targetTableName)',                                                  \n" +
"                  'I',                                                                   \n" +
"                  $(triggerHistoryId),                                                   \n" +
"                  $(oracleToClob)$(columns),                                             \n" +
"                  $(channelExpression),                                                  \n" +
"                  $(txIdExpression),                                                     \n" +
"                  $(prefixName)_pkg.disable_node_id,                                     \n" +
"                  $(externalSelect),                                                     \n" +
"                                      " + getCreateTimeExpression(symmetricDialect) + "  \n" +
"                 );                                                                      \n" +
"           end if;                                                                       \n" +
"           $(custom_on_insert_text)                                                      \n" +
"        end;                                                                             \n");

        sqlTemplates.put("insertReloadTriggerTemplate" ,
"create or replace trigger $(triggerName)                                                 \n" +
"    after insert on $(schemaName)$(tableName)                                            \n" +
"        for each row begin                                                               \n" +
"            $(custom_before_insert_text) \n" +
"            if $(syncOnInsertCondition) and $(syncOnIncomingBatchCondition) then         \n" +
"                insert into $(defaultSchema)$(prefixName)_data                           \n" +
"                  (table_name, event_type, trigger_hist_id, row_data, channel_id,        \n" +
"                  transaction_id, source_node_id, external_data, create_time)            \n" +
"                  values(                                                                \n" +
"                  '$(targetTableName)',                                                  \n" +
"                  'R',                                                                   \n" +
"                  $(triggerHistoryId),                                                   \n" +
"                  $(newKeys),                                                            \n" +
"                  $(oracleToClob)$(columns),                                             \n" +
"                  $(channelExpression),                                                  \n" +
"                  $(txIdExpression),                                                     \n" +
"                  $(prefixName)_pkg.disable_node_id,                                     \n" +
"                  $(externalSelect),                                                     \n" +
"                                      " + getCreateTimeExpression(symmetricDialect) + "  \n" +
"                 );                                                                      \n" +
"           end if;                                                                       \n" +
"           $(custom_on_insert_text)                                                      \n" +
"        end;                                                                             \n");
        
        
        sqlTemplates.put("updateTriggerTemplate" ,
"create or replace trigger $(triggerName) after update on $(schemaName)$(tableName)                                                                                                                       \n" +
"                                for each row begin                                                                                                                                                       \n" +
"                                  declare                                                                                                                                                                \n" +
"                                    var_row_data $(oracleLobType);                                                                                                                                       \n" +
"                                    var_old_data $(oracleLobType);                                                                                                                                       \n" +
"                                  begin                                                                                                                                                                  \n" +
"                                    $(custom_before_update_text) \n" +
"                                    if $(syncOnUpdateCondition) and $(syncOnIncomingBatchCondition) then                                                                                                 \n" +
"                                      select $(oracleToClob)$(columns) into var_row_data from dual;                                                                                                      \n" +
"                                      select $(oracleToClob)$(oldColumns) into var_old_data from dual;                                                                                                   \n" +
"                                      if $(dataHasChangedCondition) then                                                                                                                                 \n" +
"                                        insert into $(defaultSchema)$(prefixName)_data                                                                                                                   \n" +
"                                        (table_name, event_type, trigger_hist_id, pk_data, row_data, old_data, channel_id, transaction_id, source_node_id, external_data, create_time)                   \n" +
"                                        values(                                                                                                                                                          \n" +
"                                          '$(targetTableName)',                                                                                                                                          \n" +
"                                          'U',                                                                                                                                                           \n" +
"                                          $(triggerHistoryId),                                                                                                                                           \n" +
"                                          $(oldKeys),                                                                                                                                                    \n" +
"                                          var_row_data,                                                                                                                                                  \n" +
"                                          var_old_data,                                                                                                                                                  \n" +
"                                          $(channelExpression),                                                                                                                                          \n" +
"                                          $(txIdExpression),                                                                                                                                             \n" +
"                                          $(prefixName)_pkg.disable_node_id,                                                                                                                             \n" +
"                                          $(externalSelect),                                                                                                                                             \n" +
"                                      " + getCreateTimeExpression(symmetricDialect) + "                                                                                                                  \n" +
"                                        );                                                                                                                                                               \n" +
"                                      end if;                                                                                                                                                            \n" +
"                                    end if;                                                                                                                                                              \n" +
"                                  end;                                                                                                                                                                   \n" +
"                                  $(custom_on_update_text)                                                                                                                                               \n" +
"                                end;                                                                                                                                                                     \n" );

        sqlTemplates.put("updateReloadTriggerTemplate" ,
"create or replace trigger $(triggerName) after update on $(schemaName)$(tableName)                                                                                                                       \n" +
"                                for each row begin                                                                                                                                                       \n" +
"                                  declare                                                                                                                                                                \n" +
"                                    var_row_data $(oracleLobType);                                                                                                                                       \n" +
"                                    var_old_data $(oracleLobType);                                                                                                                                       \n" +
"                                  begin                                                                                                                                                                  \n" +
"                                    $(custom_before_update_text) \n" +
"                                    if $(syncOnUpdateCondition) and $(syncOnIncomingBatchCondition) then                                                                                                 \n" +
"                                      select $(oracleToClob)$(columns) into var_row_data from dual;                                                                                                      \n" +
"                                      select $(oracleToClob)$(oldColumns) into var_old_data from dual;                                                                                                   \n" +
"                                      if $(dataHasChangedCondition) then                                                                                                                                 \n" +
"                                        insert into $(defaultSchema)$(prefixName)_data                                                                                                                   \n" +
"                                        (table_name, event_type, trigger_hist_id, pk_data, channel_id, transaction_id, source_node_id, external_data, create_time)                   \n" +
"                                        values(                                                                                                                                                          \n" +
"                                          '$(targetTableName)',                                                                                                                                          \n" +
"                                          'R',                                                                                                                                                           \n" +
"                                          $(triggerHistoryId),                                                                                                                                           \n" +
"                                          $(oldKeys),                                                                                                                                                    \n" +
"                                          $(channelExpression),                                                                                                                                          \n" +
"                                          $(txIdExpression),                                                                                                                                             \n" +
"                                          $(prefixName)_pkg.disable_node_id,                                                                                                                             \n" +
"                                          $(externalSelect),                                                                                                                                             \n" +
"                                      " + getCreateTimeExpression(symmetricDialect) + "                                                                                                                  \n" +
"                                        );                                                                                                                                                               \n" +
"                                      end if;                                                                                                                                                            \n" +
"                                    end if;                                                                                                                                                              \n" +
"                                  end;                                                                                                                                                                   \n" +
"                                  $(custom_on_update_text)                                                                                                                                               \n" +
"                                end;                                                                                                                                                                     \n" );
        
        sqlTemplates.put("deleteTriggerTemplate" ,
"create or replace trigger  $(triggerName) after delete on $(schemaName)$(tableName)                                                                                                                    \n" +
"                                for each row begin                                                                                                                                                     \n" +
"                                  $(custom_before_delete_text) \n" +
"                                  if $(syncOnDeleteCondition) and $(syncOnIncomingBatchCondition) then                                                                                                 \n" +
"                                    insert into $(defaultSchema)$(prefixName)_data                                                                                                                     \n" +
"                                    (table_name, event_type, trigger_hist_id, pk_data, old_data, channel_id, transaction_id, source_node_id, external_data, create_time)                               \n" +
"                                    values(                                                                                                                                                            \n" +
"                                      '$(targetTableName)',                                                                                                                                            \n" +
"                                      'D',                                                                                                                                                             \n" +
"                                      $(triggerHistoryId),                                                                                                                                             \n" +
"                                      $(oldKeys),                                                                                                                                                      \n" +
"                                      $(oracleToClob)$(oldColumns),                                                                                                                                    \n" +
"                                      $(channelExpression),                                                                                                                                            \n" +
"                                      $(txIdExpression),                                                                                                                                               \n" +
"                                      $(prefixName)_pkg.disable_node_id,                                                                                                                               \n" +
"                                      $(externalSelect),                                                                                                                                               \n" +
"                                      " + getCreateTimeExpression(symmetricDialect) + "                                                                                                                \n" + 
"                                    );                                                                                                                                                                 \n" +
"                                  end if;                                                                                                                                                              \n" +
"                                  $(custom_on_delete_text)                                                                                                                                             \n" +
"                                end;                                                                                                                                                                   \n" );

        sqlTemplates.put("initialLoadSqlTemplate" ,
"select $(oracleToClob)$(columns) from $(schemaName)$(tableName) t  where $(whereClause)                                                                                                                " );
    }
    
    protected String getCreateTimeExpression(ISymmetricDialect symmetricDialect) {
        String timezone = symmetricDialect.getParameterService().getString(ParameterConstants.DATA_CREATE_TIME_TIMEZONE);
        if (StringUtils.isEmpty(timezone)) {
            return "CURRENT_TIMESTAMP";
        } else {
            return String.format("CURRENT_TIMESTAMP AT TIME ZONE '%s'", timezone);
        }    
    }

}
