/*
 * 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.
 *
 */

#include <gtest/gtest.h>
#include <parse_util.h>

#include <cmath>

TEST(ParseUtil, TryParseInt) {
  long long v = 0;
  const char *str = "12345hellooo", *end = nullptr;

  std::tie(v, end) = *TryParseInt(str);
  ASSERT_EQ(v, 12345);
  ASSERT_EQ(end - str, 5);

  ASSERT_EQ(TryParseInt("hello").Msg(), "not started as an integer");
  ASSERT_FALSE(TryParseInt("9999999999999999999999999999999999"));
}

TEST(ParseUtil, ParseInt) {
  ASSERT_EQ(*ParseInt("-2333"), -2333);
  ASSERT_EQ(*ParseInt("111", 2), 7);
  ASSERT_EQ(*ParseInt("11", 010), 9);
  ASSERT_EQ(*ParseInt("11", 10), 11);
  ASSERT_EQ(*ParseInt("11", 0x10), 17);

  ASSERT_EQ(ParseInt("hello").Msg(), "not started as an integer");
  ASSERT_EQ(ParseInt("123hello").Msg(), "encounter non-integer characters");
  ASSERT_FALSE(ParseInt("9999999999999999999999999999999999"));
  ASSERT_EQ(ParseInt<short>("99999").Msg(), "out of range of integer type");
  ASSERT_EQ(*ParseInt<short>("30000"), 30000);
  ASSERT_EQ(*ParseInt<int>("99999"), 99999);
  ASSERT_EQ(ParseInt<int>("3000000000").Msg(), "out of range of integer type");
  ASSERT_EQ(ParseInt<unsigned>("-1").Msg(), "not started as an integer");

  ASSERT_EQ(*ParseInt("123", {0, 123}), 123);
  ASSERT_EQ(ParseInt("124", {0, 123}).Msg(), "out of numeric range");
}

TEST(ParseUtil, ParseSizeAndUnit) {
  ASSERT_EQ(*ParseSizeAndUnit("123"), 123);
  ASSERT_EQ(*ParseSizeAndUnit("123K"), 123 * 1024);
  ASSERT_EQ(*ParseSizeAndUnit("123m"), 123 * 1024 * 1024);
  ASSERT_EQ(*ParseSizeAndUnit("123G"), 123ull << 30);
  ASSERT_EQ(*ParseSizeAndUnit("123t"), 123ull << 40);
  ASSERT_FALSE(ParseSizeAndUnit("123x"));
  ASSERT_FALSE(ParseSizeAndUnit("123 t"));
  ASSERT_FALSE(ParseSizeAndUnit("123 "));
  ASSERT_FALSE(ParseSizeAndUnit("t"));
  ASSERT_TRUE(ParseSizeAndUnit("16383p"));
  ASSERT_FALSE(ParseSizeAndUnit("16384p"));
  ASSERT_EQ(ParseSizeAndUnit("16388p").Msg(), "arithmetic overflow");
}

TEST(ParseUtil, ParseFloat) {
  std::string v = "1.23";
  ASSERT_EQ(*TryParseFloat(v), ParseResultAndPos<double>(1.23, v.c_str() + v.size()));

  v = "25345.346e65hello";
  ASSERT_EQ(*TryParseFloat(v), ParseResultAndPos<double>(25345.346e65, v.c_str() + v.size() - 5));

  ASSERT_FALSE(TryParseFloat("eeeeeeee"));
  ASSERT_FALSE(TryParseFloat("    "));
  ASSERT_FALSE(TryParseFloat(""));
  ASSERT_FALSE(TryParseFloat("    abcd"));

  v = "1e8   ";
  ASSERT_EQ(*TryParseFloat(v), ParseResultAndPos<double>(1e8, v.c_str() + v.size() - 3));

  ASSERT_EQ(*ParseFloat("1.23"), 1.23);
  ASSERT_EQ(*ParseFloat("1.23e2"), 1.23e2);
  ASSERT_TRUE(std::isinf(*ParseFloat("+inf")));
  ASSERT_TRUE(std::isnan(*ParseFloat("nan")));
  ASSERT_FALSE(ParseFloat("1.2 "));
  ASSERT_FALSE(ParseFloat("1.2hello"));
  ASSERT_FALSE(ParseFloat("1e100000"));
}