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/******************************************************************************
 *
 * This software is dual-licensed to you under the Universal Permissive License
 * (UPL) 1.0 as shown at https://oss.oracle.com/licenses/upl and Apache License
 * 2.0 as shown at https://www.apache.org/licenses/LICENSE-2.0. You may choose
 * either license.
 *
 * If you elect to accept the software under the Apache License, Version 2.0,
 * the following applies:
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
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 *    https://www.apache.org/licenses/LICENSE-2.0
 *
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 * 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.
 *
 * NAME
 *   137. blobDMLReturningMultipleRowsAsBuffer.js
 *
 * DESCRIPTION
 *   Testing BLOB DML returning multiple rows as buffer.
 *
 *****************************************************************************/
'use strict';

const oracledb = require('oracledb');
const assert   = require('assert');
const dbConfig = require('./dbconfig.js');

describe('137. blobDMLReturningMultipleRowsAsBuffer.js', function() {

  let connection = null;
  const tableName = "nodb_dml_blob_137";

  const blob_table_create = "BEGIN \n" +
                          "    DECLARE \n" +
                          "        e_table_missing EXCEPTION; \n" +
                          "        PRAGMA EXCEPTION_INIT(e_table_missing, -00942); \n" +
                          "    BEGIN \n" +
                          "        EXECUTE IMMEDIATE('DROP TABLE " + tableName + " PURGE'); \n" +
                          "    EXCEPTION \n" +
                          "        WHEN e_table_missing \n" +
                          "        THEN NULL; \n" +
                          "    END; \n" +
                          "    EXECUTE IMMEDIATE (' \n" +
                          "        CREATE TABLE " + tableName + " ( \n" +
                          "            num      NUMBER, \n" +
                          "            blob     BLOB \n" +
                          "        ) \n" +
                          "    '); \n" +
                          "END; ";
  const blob_table_drop = "DROP TABLE " + tableName + " PURGE";

  before(async function() {
    connection = await oracledb.getConnection(dbConfig);
  });

  after(async function() {
    await connection.close();
  });

  describe('137.1 BLOB DML returning multiple rows as buffer', function() {

    const tabsize = 10;

    before(async function() {
      await connection.execute(blob_table_create);
      await insertData(tabsize);
    });

    after(async function() {
      await connection.execute(blob_table_drop);
    });

    it('137.1.1 BLOB DML returning multiple rows as buffer', async function() {
      await updateReturning_buffer(tabsize);
    });

  });

  const insertData = async function(tableSize) {
    let result = null;
    const insert_data = "DECLARE \n" +
                      "    tmpchar VARCHAR2(2000); \n" +
                      "    tmplob BLOB; \n" +
                      "BEGIN \n" +
                      "    FOR i IN 1.." + tableSize + " LOOP \n" +
                      "         select to_char(i) into tmpchar from dual; \n" +
                      "         select utl_raw.cast_to_raw(tmpchar) into tmplob from dual; \n" +
                      "         insert into " + tableName + " values (i, tmplob); \n" +
                      "    END LOOP; \n" +
                      "    commit; \n" +
                      "END; ";

    await connection.execute(insert_data);
    result = await connection.execute("select num from " + tableName);
    assert.strictEqual(result.rows.length, tableSize);
  };

  const updateReturning_buffer = async function(tabsize) {
    const sql_update = "UPDATE " + tableName + " set num = num+10 RETURNING num, blob into :num, :lobou";
    let result = null;
    result = await connection.execute(
      sql_update,
      {
        num: { type: oracledb.NUMBER, dir: oracledb.BIND_OUT },
        lobou: { type: oracledb.BUFFER, dir: oracledb.BIND_OUT }
      });
    for (let i = 0; i < tabsize; i++) {
      const outnum = result.outBinds.num[i];
      const outbuf = Number(result.outBinds.lobou[i]);
      assert.strictEqual(outbuf, i + 1);
      assert.strictEqual(outnum, i + 11);
    }
  };
});