#pragma once
#include <stdio.h>
#include <stdlib.h>
#include <sstream>

namespace common {
namespace test {
extern int errCount;
// Run some of the tests registered by the TEST() macro.  If the
// environment variable "LEVELDB_TESTS" is not set, runs all tests.
// Otherwise, runs only the tests whose name contains the value of
// "LEVELDB_TESTS" as a substring.  E.g., suppose the tests are:
//    TEST(Foo, Hello) { ... }
//    TEST(Foo, World) { ... }
// LEVELDB_TESTS=Hello will run the first test
// LEVELDB_TESTS=o     will run both tests
// LEVELDB_TESTS=Junk  will run no tests
//
// Returns 0 if all tests pass.
// Dies or returns a non-zero value if some test fails.
extern int RunAllTests(const char* matcher);

// Return the directory to use for temporary storage.
extern std::string TmpDir();

// Return a randomization seed for this run.  Typically returns the
// same number on repeated invocations of this binary, but automated
// runs may be able to vary the seed.
extern int RandomSeed();

// An instance of Tester is allocated to hold temporary state during
// the execution of an assertion.
class Tester {
 private:
  bool ok_;
  const char* fname_;
  int line_;
  std::stringstream ss_;

 public:
  Tester(const char* f, int l)
      : ok_(true), fname_(f), line_(l) {
  }

  ~Tester() {
    if (!ok_) {
      fprintf(stderr, "\033[0;31m[ ERROR    ] ==== %s:%d:%s\n",
        fname_, line_, ss_.str().c_str());
      fprintf(stderr, "\033[0m");
      errCount++;
      exit(1);
    }
  }

  Tester& Is(bool b, const char* msg) {
    if (!b) {
      ss_ << " Assertion failure " << msg;
      ok_ = false;
    }
    return *this;
  }

#define BINARY_OP(name,op)                              \
  template <class X, class Y>                           \
  Tester& name(const X& x, const Y& y) {                \
    if (! (x op y)) {                                   \
      ss_ << " failed: Expect:" << std::hex << uint64_t {x} << (" " #op " ") << "Actual:" << std::hex << uint64_t {y};    \
      ok_ = false;                                                   \
    }                                                   \
    return *this;                                       \
  }

  BINARY_OP(IsEq, ==)
  BINARY_OP(IsNe, !=)
  BINARY_OP(IsGe, >=)
  BINARY_OP(IsGt, >)
  BINARY_OP(IsLe, <=)
  BINARY_OP(IsLt, <)
#undef BINARY_OP
#define DOUBLE_OP(name,op)                              \
  template <class X, class Y>                           \
  Tester& name(const X& x, const Y& y) {                \
    if (! (x - y > -0.000001 && x-y <0.000001)) {       \
      ss_ << " failed: Expect:" << x << (" " #op " ") << "Actual:" << y;    \
      ok_ = false;                                                   \
    }                                                   \
    return *this;                                       \
  }
  DOUBLE_OP(IsDoubleEq, ==)
#undef DOUBLE_OP

  // Attach the specified value to the error message if an error has occurred
  template <class V>
  Tester& operator<<(const V& value) {
    if (!ok_) {
      ss_ << " " << value;
    }
    return *this;
  }
};

#define ASSERT_TRUE(c) ::common::test::Tester(__FILE__, __LINE__).Is((c), #c)
#define ASSERT_FALSE(c) ::common::test::Tester(__FILE__, __LINE__).Is(!(c), #c)
#define ASSERT_EQ(a,b) ::common::test::Tester(__FILE__, __LINE__).IsEq((a),(b))
#define ASSERT_NE(a,b) ::common::test::Tester(__FILE__, __LINE__).IsNe((a),(b))
#define ASSERT_GE(a,b) ::common::test::Tester(__FILE__, __LINE__).IsGe((a),(b))
#define ASSERT_GT(a,b) ::common::test::Tester(__FILE__, __LINE__).IsGt((a),(b))
#define ASSERT_LE(a,b) ::common::test::Tester(__FILE__, __LINE__).IsLe((a),(b))
#define ASSERT_LT(a,b) ::common::test::Tester(__FILE__, __LINE__).IsLt((a),(b))
#define EXPECT_GT(a,b) ::common::test::Tester(__FILE__, __LINE__).IsLt((a),(b))
#define EXPECT_LT(a,b) ::common::test::Tester(__FILE__, __LINE__).IsLt((a),(b))
#define EXPECT_EQ(a,b) ::common::test::Tester(__FILE__, __LINE__).IsEq((a),(b))
#define EXPECT_NE(a,b) ::common::test::Tester(__FILE__, __LINE__).IsNe((a),(b))
#define EXPECT_DOUBLE_EQ(a,b) ::common::test::Tester(__FILE__, __LINE__).IsDoubleEq((a),(b))
#define EXPECT_TRUE(a) ::common::test::Tester(__FILE__, __LINE__).IsEq((a),(true))
#define EXPECT_FALSE(a) ::common::test::Tester(__FILE__, __LINE__).IsEq((a),(false))
#define EXPECT_THROW(a,exceptions) try {a;} catch(exceptions e) {EXPECT_TRUE(true);} catch(...) {EXPECT_TRUE(false);}
#define EXPECT_ANY_THROW(a) try {a;} catch(...) {EXPECT_TRUE(true);}
#define TCONCAT(a,b) TCONCAT1(a,b)
#define TCONCAT1(a,b) a##b

#define TEST(base,name)                                                 \
class TCONCAT(_Test_,base##name) : public ::common::test::TestBase {    \
 public:                                                                \
  void _Run();                                                          \
  static void _RunIt() {                                                \
    TCONCAT(_Test_,base##name) t;                                       \
    t._Run();                                                           \
  }                                                                     \
};                                                                      \
bool TCONCAT(_Test_ignored_,base##name) =                               \
  ::common::test::RegisterTest(#base, #name, &TCONCAT(_Test_,base##name)::_RunIt); \
void TCONCAT(_Test_,base##name)::_Run()

// Register the specified test.  Typically not used directly, but
// invoked via the macro expansion of TEST.
extern bool RegisterTest(const char* base, const char* name, void (*func)());

class TestBase {};

class TestPerfomence {
public:
    TestPerfomence();
    TestPerfomence(int size);
    ~TestPerfomence();
    long NowMs();
private:
    long startMs_;
};
#define TEST_PERF(a,size) ::common::test::TestPerfomence a(size);
}  // namespace test
}  // namespace common