/* Copyright (c) 2012, 2017, Oracle and/or its affiliates. All rights reserved.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License, version 2.0,
   as published by the Free Software Foundation.

   This program is also distributed with certain software (including
   but not limited to OpenSSL) that is licensed under separate terms,
   as designated in a particular file or component or in included license
   documentation.  The authors of MySQL hereby grant you an additional
   permission to link the program and your derivative works with the
   separately licensed software that they have included with MySQL.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License, version 2.0, for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */

// First include (the generated) my_config.h, to get correct platform defines.
#include "my_config.h"

#include <gtest/gtest.h>

#include "sql/field.h"
#include "unittest/gunit/fake_table.h"
#include "unittest/gunit/field_temporal_utils.h"
#include "unittest/gunit/test_utils.h"

namespace field_datetime_unittests {

using my_testing::Mock_error_handler;
using my_testing::Server_initializer;

class FieldDatetimeTest : public ::testing::Test {
 protected:
  virtual void SetUp() { initializer.SetUp(); }
  virtual void TearDown() { initializer.TearDown(); }

  THD *thd() { return initializer.thd(); }

  Server_initializer initializer;

  Field_set *create_field_set(TYPELIB *tl);
};

class Mock_field_datetime : public Field_datetime {
 private:
  uchar buffer[PACK_LENGTH];
  uchar null_byte;

  void initialize() {
    ptr = buffer;
    memset(buffer, 0, PACK_LENGTH);
    null_byte = '\0';
    set_null_ptr(&null_byte, 1);
  }

 public:
  Mock_field_datetime()
      : Field_datetime(0,             // ptr_arg
                       NULL,          // null_ptr_arg
                       1,             // null_bit_arg
                       Field::NONE,   // auto_flags_arg
                       "field_name")  // field_name_arg
  {
    initialize();
  }

  void make_writable() { bitmap_set_bit(table->write_set, field_index); }
  void make_readable() { bitmap_set_bit(table->read_set, field_index); }
};

class Mock_field_datetimef : public Field_datetimef {
  uchar null_byte;

  void initialize() {
    ptr = buffer;
    memset(buffer, 0, 8);
    null_byte = '\0';
    set_null_ptr(&null_byte, 1);
  }

 public:
  uchar buffer[8];
  Mock_field_datetimef(uint scale)
      : Field_datetimef(0,             // ptr_arg
                        NULL,          // null_ptr_arg
                        1,             // null_bit_arg
                        Field::NONE,   // unireg_check_arg
                        "field_name",  // field_name_arg
                        scale) {
    initialize();
  }

  void make_writable() { bitmap_set_bit(table->write_set, field_index); }
  void make_readable() { bitmap_set_bit(table->read_set, field_index); }
};

TEST_F(FieldDatetimeTest, StoreLegalStringValues) {
  char buff[MAX_FIELD_WIDTH];
  String str(buff, sizeof(buff), &my_charset_bin);
  String unused;

  Mock_field_datetime field_dt;
  Fake_TABLE table(&field_dt);
  table.in_use = thd();
  field_dt.make_writable();
  field_dt.make_readable();
  thd()->check_for_truncated_fields = CHECK_FIELD_WARN;

  {
    SCOPED_TRACE("");
    test_store_string(&field_dt, STRING_WITH_LEN("2001-01-01 00:00:01"), 0,
                      "2001-01-01 00:00:01", 0, TYPE_OK);
  }
  {
    SCOPED_TRACE("");
    test_store_string(&field_dt, STRING_WITH_LEN("0000-00-00 00:00:00"), 0,
                      "0000-00-00 00:00:00", 0, TYPE_OK);
  }
  {
    SCOPED_TRACE("");
    test_store_string(&field_dt, STRING_WITH_LEN("0001-00-00 00:00:00"), 0,
                      "0001-00-00 00:00:00", 0, TYPE_OK);
  }
}

// Test for MODE_TIME_TRUNCATE_FRACTIONAL.
TEST_F(FieldDatetimeTest, TestTruncFrational) {
  char buff[MAX_FIELD_WIDTH];
  String str(buff, sizeof(buff), &my_charset_bin);
  String unused;
  // fsp=6
  Mock_field_datetimef field_dt(6);
  Fake_TABLE table(&field_dt);
  table.in_use = thd();
  field_dt.make_writable();
  field_dt.make_readable();

  // fsp=0
  Mock_field_datetimef field_dt0(0);
  Fake_TABLE table0(&field_dt0);
  table0.in_use = thd();
  field_dt0.make_writable();
  field_dt0.make_readable();

  thd()->check_for_truncated_fields = CHECK_FIELD_WARN;

  {
    SCOPED_TRACE("");
    test_store_string(&field_dt, STRING_WITH_LEN("2001-01-01 00:00:01.9999999"),
                      MODE_TIME_TRUNCATE_FRACTIONAL,
                      "2001-01-01 00:00:01.999999", 0, TYPE_OK);
  }
  {
    SCOPED_TRACE("");
    test_store_string(&field_dt, STRING_WITH_LEN("2001-01-01 00:00:01.999995"),
                      MODE_TIME_TRUNCATE_FRACTIONAL,
                      "2001-01-01 00:00:01.999995", 0, TYPE_OK);
  }
  {
    SCOPED_TRACE("");
    test_store_string(&field_dt, STRING_WITH_LEN("0001-00-00 00:00:00"),
                      MODE_TIME_TRUNCATE_FRACTIONAL,
                      "0001-00-00 00:00:00.000000", 0, TYPE_OK);
  }

  {
    SCOPED_TRACE("");
    test_store_string(
        &field_dt0, STRING_WITH_LEN("2001-01-01 00:00:01.9999999"),
        MODE_TIME_TRUNCATE_FRACTIONAL, "2001-01-01 00:00:01", 0, TYPE_OK);
  }
  {
    SCOPED_TRACE("");
    test_store_string(&field_dt0, STRING_WITH_LEN("2001-01-01 00:00:01.9"),
                      MODE_TIME_TRUNCATE_FRACTIONAL, "2001-01-01 00:00:01", 0,
                      TYPE_OK);
  }
  {
    SCOPED_TRACE("");
    test_store_string(&field_dt0, STRING_WITH_LEN("0001-00-00 00:00:00.99"),
                      MODE_TIME_TRUNCATE_FRACTIONAL, "0001-00-00 00:00:00", 0,
                      TYPE_OK);
  }
}

TEST_F(FieldDatetimeTest, StoreIllegalStringValues) {
  Mock_field_datetime field_dt;
  Fake_TABLE table(&field_dt);
  table.in_use = thd();
  field_dt.make_writable();
  field_dt.make_readable();
  thd()->check_for_truncated_fields = CHECK_FIELD_WARN;

  // Bad year
  {
    SCOPED_TRACE("");
    test_store_string(&field_dt, STRING_WITH_LEN("99999-01-01 00:00:01"), 0,
                      "0000-00-00 00:00:00", WARN_DATA_TRUNCATED,
                      TYPE_ERR_BAD_VALUE);
  }

  // Bad month
  {
    SCOPED_TRACE("");
    test_store_string(&field_dt, STRING_WITH_LEN("2001-13-01 00:00:01"), 0,
                      "0000-00-00 00:00:00", WARN_DATA_TRUNCATED,
                      TYPE_ERR_BAD_VALUE);
  }

  // Bad day
  {
    SCOPED_TRACE("");
    test_store_string(&field_dt, STRING_WITH_LEN("2001-01-32 00:00:01"), 0,
                      "0000-00-00 00:00:00", WARN_DATA_TRUNCATED,
                      TYPE_ERR_BAD_VALUE);
  }

  // Bad hour
  {
    SCOPED_TRACE("");
    test_store_string(&field_dt, STRING_WITH_LEN("2001-01-01 72:00:01"), 0,
                      "0000-00-00 00:00:00", WARN_DATA_TRUNCATED,
                      TYPE_ERR_BAD_VALUE);
  }

  // Bad minute
  {
    SCOPED_TRACE("");
    test_store_string(&field_dt, STRING_WITH_LEN("2001-01-01 00:72:01"), 0,
                      "0000-00-00 00:00:00", WARN_DATA_TRUNCATED,
                      TYPE_ERR_BAD_VALUE);
  }

  // Bad second
  {
    SCOPED_TRACE("");
    test_store_string(&field_dt, STRING_WITH_LEN("2001-01-01 00:00:72"), 0,
                      "0000-00-00 00:00:00", WARN_DATA_TRUNCATED,
                      TYPE_ERR_BAD_VALUE);
  }

  // Not a day
  {
    SCOPED_TRACE("");
    test_store_string(&field_dt, STRING_WITH_LEN("foo"), 0,
                      "0000-00-00 00:00:00", WARN_DATA_TRUNCATED,
                      TYPE_ERR_BAD_VALUE);
  }
}

// Store zero date using different combinations of SQL modes
static const int no_modes = 3;
static const sql_mode_t strict_modes[no_modes] = {
    MODE_STRICT_TRANS_TABLES, MODE_STRICT_ALL_TABLES,
    MODE_STRICT_TRANS_TABLES | MODE_STRICT_ALL_TABLES};

/**
  Strictness mode test 1:

  Try storing dates with zeroes when no zero-restrictions apply
  (neither NO_ZERO_DATE or NO_ZERO_IN_DATE are set). There should be
  no errors, warnings or notes.
*/
TEST_F(FieldDatetimeTest, StoreZeroDateSqlModeNoZeroRestrictions) {
  Mock_field_datetime field_dt;
  Fake_TABLE table(&field_dt);
  table.in_use = thd();
  field_dt.make_writable();
  field_dt.make_readable();
  thd()->check_for_truncated_fields = CHECK_FIELD_WARN;

  for (int i = 0; i < no_modes; i++) {
    SCOPED_TRACE("");
    store_zero_in_sql_mode(&field_dt, STRING_WITH_LEN("0000-00-00 00:00:00"),
                           "0000-00-00 00:00:00", TYPE_OK, strict_modes[i], 0);
  }

  for (int i = 0; i < no_modes; i++) {
    SCOPED_TRACE("");
    store_zero_in_sql_mode(&field_dt, STRING_WITH_LEN("0000-01-01 00:00:00"),
                           "0000-01-01 00:00:00", TYPE_OK, strict_modes[i], 0);
  }

  for (int i = 0; i < no_modes; i++) {
    SCOPED_TRACE("");
    store_zero_in_sql_mode(&field_dt, STRING_WITH_LEN("2001-00-01 00:00:00"),
                           "2001-00-01 00:00:00", TYPE_OK, strict_modes[i], 0);
  }

  for (int i = 0; i < no_modes; i++) {
    SCOPED_TRACE("");
    store_zero_in_sql_mode(&field_dt, STRING_WITH_LEN("2001-01-00 00:00:00"),
                           "2001-01-00 00:00:00", TYPE_OK, strict_modes[i], 0);
  }
}

static const type_conversion_status nozero_expected_status[] = {
    TYPE_ERR_BAD_VALUE, TYPE_ERR_BAD_VALUE, TYPE_ERR_BAD_VALUE};

/**
  Strictness mode test 2:

  Try storing dates with zeroes when NO_ZERO_DATE flag is set. There
  should be no errors, warnings or notes unless the entire date is
  zero: "0000-00-00"
*/
TEST_F(FieldDatetimeTest, StoreZeroDateSqlModeNoZeroDate) {
  Mock_field_datetime field_dt;
  Fake_TABLE table(&field_dt);
  table.in_use = thd();
  field_dt.make_writable();
  field_dt.make_readable();
  thd()->check_for_truncated_fields = CHECK_FIELD_WARN;

  // With "MODE_NO_ZERO_DATE" set - Errors if date is all null
  for (int i = 0; i < no_modes; i++) {
    SCOPED_TRACE("");
    store_zero_in_sql_mode(&field_dt, STRING_WITH_LEN("0000-00-00 00:00:00"),
                           "0000-00-00 00:00:00", nozero_expected_status[i],
                           MODE_NO_ZERO_DATE | strict_modes[i],
                           ER_TRUNCATED_WRONG_VALUE);
  }

  // Zero year, month or day is fine
  for (int i = 0; i < no_modes; i++) {
    SCOPED_TRACE("");
    store_zero_in_sql_mode(&field_dt, STRING_WITH_LEN("0000-01-01 00:00:00"),
                           "0000-01-01 00:00:00", TYPE_OK,
                           MODE_NO_ZERO_DATE | strict_modes[i], 0);
  }

  for (int i = 0; i < no_modes; i++) {
    SCOPED_TRACE("");
    store_zero_in_sql_mode(&field_dt, STRING_WITH_LEN("2001-00-01 00:00:00"),
                           "2001-00-01 00:00:00", TYPE_OK,
                           MODE_NO_ZERO_DATE | strict_modes[i], 0);
  }

  for (int i = 0; i < no_modes; i++) {
    SCOPED_TRACE("");
    store_zero_in_sql_mode(&field_dt, STRING_WITH_LEN("2001-01-00 00:00:00"),
                           "2001-01-00 00:00:00", TYPE_OK,
                           MODE_NO_ZERO_DATE | strict_modes[i], 0);
  }
}

/**
  Strictness mode test 3:

  Try storing dates with zeroes when NO_ZERO_IN_DATE flag is set. There
  should be no errors unless either month or day is zero.
*/
TEST_F(FieldDatetimeTest, StoreZeroDateSqlModeNoZeroInDate) {
  Mock_field_datetime field_dt;
  Fake_TABLE table(&field_dt);
  table.in_use = thd();
  field_dt.make_writable();
  field_dt.make_readable();
  thd()->check_for_truncated_fields = CHECK_FIELD_WARN;

  // With "MODE_NO_ZERO_IN_DATE" set - Entire date zero is ok
  for (int i = 0; i < no_modes; i++) {
    SCOPED_TRACE("");
    store_zero_in_sql_mode(&field_dt, STRING_WITH_LEN("0000-00-00 00:00:00"),
                           "0000-00-00 00:00:00", TYPE_OK,
                           MODE_NO_ZERO_IN_DATE | strict_modes[i], 0);
  }

  // Year 0 is valid in strict mode too
  for (int i = 0; i < no_modes; i++) {
    SCOPED_TRACE("");
    store_zero_in_sql_mode(&field_dt, STRING_WITH_LEN("0000-01-01 00:00:00"),
                           "0000-01-01 00:00:00", TYPE_OK,
                           MODE_NO_ZERO_IN_DATE | strict_modes[i], 0);
  }

  // Month 0 is NOT valid in strict mode, stores all-zero date
  for (int i = 0; i < no_modes; i++) {
    SCOPED_TRACE("");
    store_zero_in_sql_mode(&field_dt, STRING_WITH_LEN("2001-00-01 00:00:00"),
                           "0000-00-00 00:00:00", nozero_expected_status[i],
                           MODE_NO_ZERO_IN_DATE | strict_modes[i],
                           ER_TRUNCATED_WRONG_VALUE);
  }

  // Day 0 is NOT valid in strict mode, stores all-zero date
  for (int i = 0; i < no_modes; i++) {
    SCOPED_TRACE("");
    store_zero_in_sql_mode(&field_dt, STRING_WITH_LEN("2001-01-00 00:00:00"),
                           "0000-00-00 00:00:00", nozero_expected_status[i],
                           MODE_NO_ZERO_IN_DATE | strict_modes[i],
                           ER_TRUNCATED_WRONG_VALUE);
  }
}

}  // namespace field_datetime_unittests