//-----------------------------------------------------------------------------
// Copyright (c) 2016, 2022, Oracle and/or its affiliates.
//
// 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 http://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.
// You may obtain a copy of the License at
//
//    https://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.
//-----------------------------------------------------------------------------

//-----------------------------------------------------------------------------
// DemoDistribTrans.c
//   Demos simple handling of distributed transactions.
//-----------------------------------------------------------------------------

#include "SampleLib.h"
#define DELETE_TEXT         "delete from DemoTempTable"
#define INSERT_TEXT         "insert into DemoTempTable values (:1, :2)"
#define FORMAT_ID           100
#define TRANSACTION_ID      "123"
#define BRANCH_ID           "456"

//-----------------------------------------------------------------------------
// main()
//-----------------------------------------------------------------------------
int main(int argc, char **argv)
{
    dpiData intColValue, stringColValue;
    uint32_t numQueryColumns;
    uint64_t rowCount;
    int commitNeeded;
    dpiStmt *stmt;
    dpiConn *conn;

    // connect to database
    conn = dpiSamples_getConn(0, NULL);

    // start distributed transaction
    if (dpiConn_beginDistribTrans(conn, FORMAT_ID, TRANSACTION_ID,
            strlen(TRANSACTION_ID), BRANCH_ID, strlen(BRANCH_ID)) < 0)
        return dpiSamples_showError();

    // perform delete
    if (dpiConn_prepareStmt(conn, 0, DELETE_TEXT, strlen(DELETE_TEXT), NULL, 0,
            &stmt) < 0)
        return dpiSamples_showError();
    if (dpiStmt_execute(stmt, 0, &numQueryColumns) < 0)
        return dpiSamples_showError();
    if (dpiStmt_getRowCount(stmt, &rowCount) < 0)
        return dpiSamples_showError();
    printf("%" PRIu64 " rows deleted.\n", rowCount);
    dpiStmt_release(stmt);

    // perform insert
    if (dpiConn_prepareStmt(conn, 0, INSERT_TEXT, strlen(INSERT_TEXT), NULL, 0,
            &stmt) < 0)
        return dpiSamples_showError();
    intColValue.isNull = 0;
    stringColValue.isNull = 0;
    intColValue.value.asInt64 = 1;
    if (dpiStmt_bindValueByPos(stmt, 1, DPI_NATIVE_TYPE_INT64,
            &intColValue) < 0)
        return dpiSamples_showError();
    stringColValue.value.asBytes.ptr = "DEMO 1";
    stringColValue.value.asBytes.length = strlen("DEMO 1");
    if (dpiStmt_bindValueByPos(stmt, 2, DPI_NATIVE_TYPE_BYTES,
            &stringColValue) < 0)
        return dpiSamples_showError();
    if (dpiStmt_execute(stmt, 0, &numQueryColumns) < 0)
        return dpiSamples_showError();
    if (dpiStmt_getRowCount(stmt, &rowCount) < 0)
        return dpiSamples_showError();
    printf("%" PRIu64 " rows inserted.\n", rowCount);

    // prepare transaction for commit
    if (dpiConn_prepareDistribTrans(conn, &commitNeeded) < 0)
        return dpiSamples_showError();

    // commit changes
    if (commitNeeded && dpiConn_commit(conn) < 0)
        return dpiSamples_showError();

    // clean up
    dpiStmt_release(stmt);
    dpiConn_release(conn);

    printf("Done.\n");
    return 0;
}