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#include "session/key_event_util.h"

#include "base/number_util.h"
#include "base/util.h"
#include "session/commands.pb.h"
#include "session/key_parser.h"
#include "testing/base/public/gunit.h"

namespace mozc {
using commands::KeyEvent;

namespace {
::testing::AssertionResult CompareKeyEvent(const char *expected_expr,
                                           const char *actual_expr,
                                           const KeyEvent &expected,
                                           const KeyEvent &actual) {
  {  // Key code
    const int expected_key_code =
        (expected.has_key_code()) ? expected.key_code() : -1;
    const int actual_key_code =
        (actual.has_key_code()) ? actual.key_code() : -1;
    if (expected_key_code != actual_key_code) {
      const string expected_value = (expected_key_code == -1)
          ? "None"
          : Util::StringPrintf("%c (%d)", expected_key_code, expected_key_code);
      const string actual_value = (actual_key_code == -1)
          ? string("None")
          : Util::StringPrintf("%c (%d)", actual_key_code, actual_key_code);
      return ::testing::AssertionFailure() <<
          "Key codes are not same\n" <<
          "Expected: " << expected_value << "\n" <<
          "Actual  : " << actual_value;
    }
  }

  {  // Special key
    const int expected_special_key =
        (expected.has_special_key()) ? expected.special_key() : -1;
    const int actual_special_key =
        (actual.has_special_key()) ? actual.special_key() : -1;
    if (expected_special_key != actual_special_key) {
      const string expected_value = (expected_special_key == -1)
          ? "None" : NumberUtil::SimpleItoa(expected_special_key);
      const string actual_value = (actual_special_key == -1)
          ? "None" : NumberUtil::SimpleItoa(actual_special_key);
      return ::testing::AssertionFailure() <<
          "Special keys are not same\n" <<
          "Expected: " << expected_value << "\n" <<
          "Actual  : " << actual_value;
    }
  }

  {  // Modifier keys
    const int expected_modifier_keys = KeyEventUtil::GetModifiers(expected);
    const int actual_modifier_keys = KeyEventUtil::GetModifiers(actual);
    if (expected_modifier_keys != actual_modifier_keys) {
      return ::testing::AssertionFailure() <<
          "Modifier keys are not same\n" <<
          "Expected: " << expected_modifier_keys << "\n" <<
          "Actual  : " << actual_modifier_keys;
    }
  }

  return ::testing::AssertionSuccess();
}

#define EXPECT_EQ_KEY_EVENT(expected, actual) \
  EXPECT_PRED_FORMAT2(CompareKeyEvent, expected, actual)
}  // namespace

TEST(KeyEventUtilTest, GetModifiers) {
  KeyEvent key_event;

  KeyParser::ParseKey("a", &key_event);
  EXPECT_EQ(0, KeyEventUtil::GetModifiers(key_event));

  KeyParser::ParseKey("Alt", &key_event);
  EXPECT_EQ(KeyEvent::ALT, KeyEventUtil::GetModifiers(key_event));

  KeyParser::ParseKey("Ctrl", &key_event);
  EXPECT_EQ(KeyEvent::CTRL, KeyEventUtil::GetModifiers(key_event));

  KeyParser::ParseKey("Shift", &key_event);
  EXPECT_EQ(KeyEvent::SHIFT, KeyEventUtil::GetModifiers(key_event));

  KeyParser::ParseKey("Caps", &key_event);
  EXPECT_EQ(KeyEvent::CAPS, KeyEventUtil::GetModifiers(key_event));

  KeyParser::ParseKey("LeftAlt RightAlt", &key_event);
  EXPECT_EQ((KeyEvent::ALT | KeyEvent::LEFT_ALT | KeyEvent::RIGHT_ALT),
            KeyEventUtil::GetModifiers(key_event));

  KeyParser::ParseKey("LeftAlt Ctrl RightShift", &key_event);
  EXPECT_EQ((KeyEvent::ALT | KeyEvent::LEFT_ALT | KeyEvent::CTRL |
             KeyEvent::SHIFT | KeyEvent::RIGHT_SHIFT),
            KeyEventUtil::GetModifiers(key_event));
}

TEST(KeyEventUtilTest, GetKeyInformation) {
  const char *kTestKeys[] = {
    "a",
    "Space",
    "Shift",
    "Shift a",
    "Shift Space",
    "Space a",
    "LeftShift Space a",
  };

  KeyEvent key_event;
  uint64 output;

  for (size_t i = 0; i < arraysize(kTestKeys); ++i) {
    SCOPED_TRACE(kTestKeys[i]);
    KeyParser::ParseKey(kTestKeys[i], &key_event);
    ASSERT_TRUE(KeyEventUtil::GetKeyInformation(key_event, &output));

    uint64 expected = 0;
    if (key_event.has_key_code()) {
      expected |= static_cast<uint64>(key_event.key_code());
    }
    if (key_event.has_special_key()) {
      expected |= static_cast<uint64>(key_event.special_key()) << 32;
    }
    expected |=
        static_cast<uint64>(KeyEventUtil::GetModifiers(key_event)) << 48;

    EXPECT_EQ(expected, output);
  }

  const uint32 kEscapeKeyCode = 27;
  key_event.Clear();
  key_event.set_key_code(kEscapeKeyCode);
  // Escape key should not set on key_code field.
  EXPECT_FALSE(KeyEventUtil::GetKeyInformation(key_event, &output));
}

TEST(KeyEventUtilTest, NormalizeModifiers) {
  KeyEvent key_event;
  KeyEvent normalized_key_event;

  {  // Removes caps
    KeyParser::ParseKey("CAPS H", &key_event);
    ASSERT_EQ(1, key_event.modifier_keys_size());
    ASSERT_EQ(KeyEvent::CAPS, KeyEventUtil::GetModifiers(key_event));
    ASSERT_EQ('H', key_event.key_code());

    KeyEventUtil::NormalizeModifiers(key_event, &normalized_key_event);
    EXPECT_EQ(0, normalized_key_event.modifier_keys_size());
    EXPECT_EQ('h', normalized_key_event.key_code());
  }

  {  // Removes left_shift
    KeyParser::ParseKey("LeftShift", &key_event);
    ASSERT_EQ(2, key_event.modifier_keys_size());
    ASSERT_EQ((KeyEvent::SHIFT | KeyEvent::LEFT_SHIFT),
              KeyEventUtil::GetModifiers(key_event));

    KeyEventUtil::NormalizeModifiers(key_event, &normalized_key_event);
    EXPECT_EQ(1, normalized_key_event.modifier_keys_size());
    ASSERT_EQ(KeyEvent::SHIFT,
              KeyEventUtil::GetModifiers(normalized_key_event));
  }

  {  // Removes caps and left_shift
    KeyParser::ParseKey("CAPS LeftShift H", &key_event);
    ASSERT_EQ(3, key_event.modifier_keys_size());
    ASSERT_EQ((KeyEvent::CAPS | KeyEvent::SHIFT | KeyEvent::LEFT_SHIFT),
              KeyEventUtil::GetModifiers(key_event));

    ASSERT_EQ('H', key_event.key_code());

    KeyEventUtil::NormalizeModifiers(key_event, &normalized_key_event);
    EXPECT_EQ(1, normalized_key_event.modifier_keys_size());
    EXPECT_EQ(KeyEvent::SHIFT,
              KeyEventUtil::GetModifiers(normalized_key_event));
    EXPECT_EQ('h', normalized_key_event.key_code());
  }
}

TEST(KeyEventUtilTest, NormalizeNumpadKey) {
  const struct NormalizeNumpadKeyTestData {
    const char *from;
    const char *to;
  } kNormalizeNumpadKeyTestData[] = {
    { "a",             "a" },
    { "Shift",         "Shift" },
    { "Caps",          "Caps" },
    { "Enter",         "Enter" },
    { "Shift Caps a",  "Shift Caps a" },
    { "NUMPAD0",       "0" },
    { "NUMPAD9",       "9" },
    { "MULTIPLY",      "*" },
    { "SEPARATOR",     "Enter" },
    { "EQUALS",        "=" },
    { "Ctrl NUMPAD0",  "Ctrl 0" },
    { "NUMPAD0 a",     "0" },
  };

  for (size_t i = 0; i < arraysize(kNormalizeNumpadKeyTestData); ++i) {
    const NormalizeNumpadKeyTestData &data = kNormalizeNumpadKeyTestData[i];
    SCOPED_TRACE(data.from);

    KeyEvent key_event_from, key_event_to, key_event_normalized;
    KeyParser::ParseKey(data.from, &key_event_from);
    KeyParser::ParseKey(data.to, &key_event_to);
    KeyEventUtil::NormalizeNumpadKey(key_event_from, &key_event_normalized);
    EXPECT_EQ_KEY_EVENT(key_event_to, key_event_normalized);
  }
}

TEST(KeyEventUtilTest, MaybeGetKeyStub) {
  KeyEvent key_event;
  KeyInformation key;

  KeyParser::ParseKey("Shift", &key_event);
  EXPECT_FALSE(KeyEventUtil::MaybeGetKeyStub(key_event, &key));

  KeyParser::ParseKey("Space", &key_event);
  EXPECT_FALSE(KeyEventUtil::MaybeGetKeyStub(key_event, &key));

  const uint32 kEscapeKeyCode = 27;
  key_event.Clear();
  key_event.set_key_code(kEscapeKeyCode);
  EXPECT_FALSE(KeyEventUtil::MaybeGetKeyStub(key_event, &key));

  KeyParser::ParseKey("a", &key_event);
  EXPECT_TRUE(KeyEventUtil::MaybeGetKeyStub(key_event, &key));
  EXPECT_EQ(static_cast<KeyInformation>(KeyEvent::TEXT_INPUT) << 32, key);
}

TEST(KeyEventUtilTest, RemvoeModifiers) {
  const struct RemoveModifiersTestData {
    const char *input;
    const char *remove;
    const char *output;
  } kRemoveModifiersTestData[] = {
    {
      "",
      "",
      "",
    }, {
      "Ctrl Shift LeftAlt Caps",
      "Ctrl Shift LeftAlt Caps",
      "",
    }, {
      "Ctrl Shift LeftAlt Caps",
      "Shift Caps",
      "Ctrl LeftAlt",
    }, {
      "Ctrl Shift LeftAlt Caps",
      "Alt",
      "Ctrl Shift Caps",
    }, {
      "",
      "Ctrl Shift LeftAlt Caps",
      "",
    },
  };

  for (size_t i = 0; i < arraysize(kRemoveModifiersTestData); ++i) {
    SCOPED_TRACE(Util::StringPrintf("index = %d", static_cast<int>(i)));
    const RemoveModifiersTestData &data = kRemoveModifiersTestData[i];

    KeyEvent input, remove, output;
    KeyParser::ParseKey(data.input, &input);
    KeyParser::ParseKey(data.remove, &remove);
    KeyParser::ParseKey(data.output, &output);
    const uint32 remove_modifiers = KeyEventUtil::GetModifiers(remove);

    KeyEvent removed_key_event;
    KeyEventUtil::RemoveModifiers(input, remove_modifiers, &removed_key_event);
    EXPECT_EQ_KEY_EVENT(output, removed_key_event);
  }
}

TEST(KeyEventUtilTest, HasModifiers) {
  EXPECT_TRUE(KeyEventUtil::HasAlt(KeyEvent::ALT));
  EXPECT_TRUE(KeyEventUtil::HasAlt(KeyEvent::LEFT_ALT));
  EXPECT_TRUE(KeyEventUtil::HasAlt(KeyEvent::ALT | KeyEvent::CTRL));
  EXPECT_FALSE(KeyEventUtil::HasAlt(0));
  EXPECT_FALSE(KeyEventUtil::HasAlt(KeyEvent::CTRL));
  EXPECT_FALSE(KeyEventUtil::HasAlt(KeyEvent::SHIFT));

  EXPECT_TRUE(KeyEventUtil::HasCtrl(KeyEvent::CTRL));
  EXPECT_TRUE(KeyEventUtil::HasCtrl(KeyEvent::LEFT_CTRL));
  EXPECT_TRUE(KeyEventUtil::HasCtrl(KeyEvent::CTRL | KeyEvent::SHIFT));
  EXPECT_FALSE(KeyEventUtil::HasCtrl(0));
  EXPECT_FALSE(KeyEventUtil::HasCtrl(KeyEvent::ALT));
  EXPECT_FALSE(KeyEventUtil::HasCtrl(KeyEvent::SHIFT));

  EXPECT_TRUE(KeyEventUtil::HasShift(KeyEvent::SHIFT));
  EXPECT_TRUE(KeyEventUtil::HasShift(KeyEvent::LEFT_SHIFT));
  EXPECT_TRUE(KeyEventUtil::HasShift(KeyEvent::SHIFT | KeyEvent::ALT));
  EXPECT_FALSE(KeyEventUtil::HasShift(0));
  EXPECT_FALSE(KeyEventUtil::HasShift(KeyEvent::ALT));
  EXPECT_FALSE(KeyEventUtil::HasShift(KeyEvent::CTRL));

  EXPECT_TRUE(KeyEventUtil::HasCaps(KeyEvent::CAPS));
  EXPECT_TRUE(KeyEventUtil::HasCaps(KeyEvent::CAPS | KeyEvent::ALT));
  EXPECT_FALSE(KeyEventUtil::HasCaps(0));
  EXPECT_FALSE(KeyEventUtil::HasCaps(KeyEvent::CTRL));
}

TEST(KeyEventUtilTest, IsModifiers) {
  const struct IsModifiersTestData {
    uint32 modifiers;
    bool is_alt;
    bool is_ctrl;
    bool is_shift;
    bool is_alt_ctrl;
    bool is_alt_shift;
    bool is_ctrl_shift;
    bool is_alt_ctrl_shift;
  } kIsModifiersTestData[] = {
    {
      0,
      false, false, false, false, false, false, false
    }, {
      KeyEvent::ALT,
      true, false, false, false, false, false, false,
    }, {
      KeyEvent::CTRL,
      false, true, false, false, false, false, false,
    }, {
      KeyEvent::SHIFT,
      false, false, true, false, false, false, false,
    }, {
      KeyEvent::ALT | KeyEvent::CTRL,
      false, false, false, true, false, false, false,
    }, {
      KeyEvent::ALT | KeyEvent::SHIFT,
      false, false, false, false, true, false, false,
    }, {
      KeyEvent::CTRL | KeyEvent::SHIFT,
      false, false, false, false, false, true, false,
    }, {
      KeyEvent::ALT | KeyEvent::CTRL | KeyEvent::SHIFT,
      false, false, false, false, false, false, true,
    }, {
      KeyEvent::LEFT_ALT,
      true, false, false, false, false, false, false,
    }, {
      KeyEvent::ALT | KeyEvent::LEFT_ALT | KeyEvent::RIGHT_ALT,
      true, false, false, false, false, false, false,
    }, {
      KeyEvent::CAPS,
      false, false, false, false, false, false, false,
    }, {
      KeyEvent::ALT | KeyEvent::CAPS,
      true, false, false, false, false, false, false,
    },
  };

  for (size_t i = 0; i < arraysize(kIsModifiersTestData); ++i) {
    const IsModifiersTestData &data = kIsModifiersTestData[i];
    SCOPED_TRACE(Util::StringPrintf("index: %d", static_cast<int>(i)));

    EXPECT_EQ(data.is_alt, KeyEventUtil::IsAlt(data.modifiers));
    EXPECT_EQ(data.is_ctrl, KeyEventUtil::IsCtrl(data.modifiers));
    EXPECT_EQ(data.is_shift, KeyEventUtil::IsShift(data.modifiers));
    EXPECT_EQ(data.is_alt_ctrl, KeyEventUtil::IsAltCtrl(data.modifiers));
    EXPECT_EQ(data.is_alt_shift, KeyEventUtil::IsAltShift(data.modifiers));
    EXPECT_EQ(data.is_ctrl_shift, KeyEventUtil::IsCtrlShift(data.modifiers));
    EXPECT_EQ(data.is_alt_ctrl_shift,
              KeyEventUtil::IsAltCtrlShift(data.modifiers));
  }
}

TEST(KeyEventUtilTest, IsLowerUpperAlphabet) {
  const struct IsLowerUpperAlphabetTestData {
    const char *key;
    bool is_lower;
    bool is_upper;
  } kIsLowerUpperAlphabetTestData[] = {
    { "a",            true,  false },
    { "A",            false, true },
    { "Shift a",      false, true },
    { "Shift A",      true,  false },
    { "Shift Caps a", true,  false },
    { "Shift Caps A", false, true },
    { "0",            false, false },
    { "Shift",        false, false },
    { "Caps",         false, false },
    { "Space",        false, false },
  };

  for (size_t i = 0; i < arraysize(kIsLowerUpperAlphabetTestData); ++i) {
    const IsLowerUpperAlphabetTestData &data = kIsLowerUpperAlphabetTestData[i];
    SCOPED_TRACE(data.key);
    KeyEvent key_event;
    KeyParser::ParseKey(data.key, &key_event);
    EXPECT_EQ(data.is_lower, KeyEventUtil::IsLowerAlphabet(key_event));
    EXPECT_EQ(data.is_upper, KeyEventUtil::IsUpperAlphabet(key_event));
  }
}

TEST(KeyEventUtilTest, IsNumpadKey) {
  const struct IsNumpadKeyTestData {
    const char *key;
    bool is_numpad_key;
  } kIsNumpadKeyTestData[] = {
    { "a",            false },
    { "A",            false },
    { "Shift",        false },
    { "Shift a",      false },
    { "0",            false },
    { "EISU",         false },
    { "NUMPAD0",      true },
    { "NUMPAD9",      true },
    { "MULTIPLY",     true },
    { "EQUALS",       true },
    { "COMMA",        true },
    { "TEXTINPUT",    false },
  };

  for (size_t i = 0; i < arraysize(kIsNumpadKeyTestData); ++i) {
    const IsNumpadKeyTestData &data = kIsNumpadKeyTestData[i];
    SCOPED_TRACE(data.key);
    KeyEvent key_event;
    KeyParser::ParseKey(data.key, &key_event);
    EXPECT_EQ(data.is_numpad_key, KeyEventUtil::IsNumpadKey(key_event));
  }
}

}  // namespace mozc