/*
 * barrier -- mouse and keyboard sharing utility
 * Copyright (C) 2012-2016 Symless Ltd.
 * Copyright (C) 2011 Nick Bolton
 *
 * This package is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * found in the file LICENSE that should have accompanied this file.
 *
 * This package 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 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "test/mock/barrier/MockKeyState.h"
#include "test/mock/barrier/MockEventQueue.h"
#include "test/mock/barrier/MockKeyMap.h"

#include "test/global/gtest.h"
#include "test/global/gmock.h"

using ::testing::_;
using ::testing::NiceMock;
using ::testing::Invoke;
using ::testing::Return;
using ::testing::ReturnRef;
using ::testing::SaveArg;

void
stubPollPressedKeys(IKeyState::KeyButtonSet& pressedKeys);

void
assertMaskIsOne(ForeachKeyCallback cb, void* userData);

const barrier::KeyMap::KeyItem*
stubMapKey(
           barrier::KeyMap::Keystrokes& keys, KeyID id, SInt32 group,
           barrier::KeyMap::ModifierToKeys& activeModifiers,
           KeyModifierMask& currentState,
           KeyModifierMask desiredMask,
           bool isAutoRepeat);

barrier::KeyMap::Keystroke s_stubKeystroke(1, false, false);
barrier::KeyMap::KeyItem s_stubKeyItem;

TEST(CKeyStateTests, onKey_aKeyDown_keyStateOne)
{
    MockKeyMap keyMap;
    MockEventQueue eventQueue;
    KeyStateImpl keyState(eventQueue, keyMap);

    keyState.onKey(1, true, KeyModifierAlt);

    EXPECT_EQ(1, keyState.getKeyState(1));
}

TEST(KeyStateTests, onKey_aKeyUp_keyStateZero)
{
    MockKeyMap keyMap;
    MockEventQueue eventQueue;
    KeyStateImpl keyState(eventQueue, keyMap);

    keyState.onKey(1, false, KeyModifierAlt);

    EXPECT_EQ(0, keyState.getKeyState(1));
}

TEST(KeyStateTests, onKey_invalidKey_keyStateZero)
{
    MockKeyMap keyMap;
    MockEventQueue eventQueue;
    KeyStateImpl keyState(eventQueue, keyMap);

    keyState.onKey(0, true, KeyModifierAlt);

    EXPECT_EQ(0, keyState.getKeyState(0));
}

TEST(KeyStateTests, sendKeyEvent_halfDuplexAndRepeat_addEventNotCalled)
{
    NiceMock<MockKeyMap> keyMap;
    NiceMock<MockEventQueue> eventQueue;
    KeyStateImpl keyState(eventQueue, keyMap);

    ON_CALL(keyMap, isHalfDuplex(_, _)).WillByDefault(Return(true));

    EXPECT_CALL(eventQueue, addEvent(_)).Times(0);

    keyState.sendKeyEvent(NULL, false, true, kKeyCapsLock, 0, 0, 0);
}

TEST(KeyStateTests, sendKeyEvent_halfDuplex_addEventCalledTwice)
{
    NiceMock<MockKeyMap> keyMap;
    NiceMock<MockEventQueue> eventQueue;
    KeyStateImpl keyState(eventQueue, keyMap);
    IKeyStateEvents keyStateEvents;
    keyStateEvents.setEvents(&eventQueue);

    ON_CALL(keyMap, isHalfDuplex(_, _)).WillByDefault(Return(true));
    ON_CALL(eventQueue, forIKeyState()).WillByDefault(ReturnRef(keyStateEvents));

    EXPECT_CALL(eventQueue, addEvent(_)).Times(2);

    keyState.sendKeyEvent(NULL, false, false, kKeyCapsLock, 0, 0, 0);
}

TEST(KeyStateTests, sendKeyEvent_keyRepeat_addEventCalledOnce)
{
    NiceMock<MockKeyMap> keyMap;
    NiceMock<MockEventQueue> eventQueue;
    KeyStateImpl keyState(eventQueue, keyMap);
    IKeyStateEvents keyStateEvents;
    keyStateEvents.setEvents(&eventQueue);

    ON_CALL(eventQueue, forIKeyState()).WillByDefault(ReturnRef(keyStateEvents));

    EXPECT_CALL(eventQueue, addEvent(_)).Times(1);

    keyState.sendKeyEvent(NULL, false, true, 1, 0, 0, 0);
}

TEST(KeyStateTests, sendKeyEvent_keyDown_addEventCalledOnce)
{
    NiceMock<MockKeyMap> keyMap;
    NiceMock<MockEventQueue> eventQueue;
    KeyStateImpl keyState(eventQueue, keyMap);
    IKeyStateEvents keyStateEvents;
    keyStateEvents.setEvents(&eventQueue);

    ON_CALL(eventQueue, forIKeyState()).WillByDefault(ReturnRef(keyStateEvents));

    EXPECT_CALL(eventQueue, addEvent(_)).Times(1);

    keyState.sendKeyEvent(NULL, true, false, 1, 0, 0, 0);
}

TEST(KeyStateTests, sendKeyEvent_keyUp_addEventCalledOnce)
{
    NiceMock<MockKeyMap> keyMap;
    NiceMock<MockEventQueue> eventQueue;
    KeyStateImpl keyState(eventQueue, keyMap);
    IKeyStateEvents keyStateEvents;
    keyStateEvents.setEvents(&eventQueue);

    ON_CALL(eventQueue, forIKeyState()).WillByDefault(ReturnRef(keyStateEvents));

    EXPECT_CALL(eventQueue, addEvent(_)).Times(1);

    keyState.sendKeyEvent(NULL, false, false, 1, 0, 0, 0);
}

TEST(KeyStateTests, updateKeyMap_mockKeyMap_keyMapGotMock)
{
    NiceMock<MockKeyMap> keyMap;
    MockEventQueue eventQueue;
    KeyStateImpl keyState(eventQueue, keyMap);

    // key map member gets a new key map via swap()
    EXPECT_CALL(keyMap, swap(_));

    keyState.updateKeyMap();
}

TEST(KeyStateTests, updateKeyState_pollInsertsSingleKey_keyIsDown)
{
    NiceMock<MockKeyMap> keyMap;
    MockEventQueue eventQueue;
    KeyStateImpl keyState(eventQueue, keyMap);
    ON_CALL(keyState, pollPressedKeys(_)).WillByDefault(Invoke(stubPollPressedKeys));

    keyState.updateKeyState();

    bool actual = keyState.isKeyDown(1);
    ASSERT_TRUE(actual);
}

TEST(KeyStateTests, updateKeyState_pollDoesNothing_keyNotSet)
{
    NiceMock<MockKeyMap> keyMap;
    MockEventQueue eventQueue;
    KeyStateImpl keyState(eventQueue, keyMap);

    keyState.updateKeyState();

    bool actual = keyState.isKeyDown(1);
    ASSERT_FALSE(actual);
}

TEST(KeyStateTests, updateKeyState_activeModifiers_maskSet)
{
    NiceMock<MockKeyMap> keyMap;
    MockEventQueue eventQueue;
    KeyStateImpl keyState(eventQueue, keyMap);
    ON_CALL(keyState, pollActiveModifiers()).WillByDefault(Return(KeyModifierAlt));

    keyState.updateKeyState();

    KeyModifierMask actual = keyState.getActiveModifiers();
    ASSERT_EQ(KeyModifierAlt, actual);
}

TEST(KeyStateTests, updateKeyState_activeModifiers_maskNotSet)
{
    NiceMock<MockKeyMap> keyMap;
    MockEventQueue eventQueue;
    KeyStateImpl keyState(eventQueue, keyMap);

    keyState.updateKeyState();

    KeyModifierMask actual = keyState.getActiveModifiers();
    ASSERT_EQ(0, actual);
}

TEST(KeyStateTests, updateKeyState_activeModifiers_keyMapGotModifers)
{
    MockKeyMap keyMap;
    MockEventQueue eventQueue;
    KeyStateImpl keyState(eventQueue, keyMap);
    ON_CALL(keyState, pollActiveModifiers()).WillByDefault(Return(1));
    ON_CALL(keyMap, foreachKey(_, _)).WillByDefault(Invoke(assertMaskIsOne));

    // key map gets new modifiers via foreachKey()
    EXPECT_CALL(keyMap, foreachKey(_, _));

    keyState.updateKeyState();
}

TEST(KeyStateTests, setHalfDuplexMask_capsLock_halfDuplexCapsLockAdded)
{
    MockKeyMap keyMap;
    MockEventQueue eventQueue;
    KeyStateImpl keyState(eventQueue, keyMap);

    EXPECT_CALL(keyMap, addHalfDuplexModifier(kKeyCapsLock));

    keyState.setHalfDuplexMask(KeyModifierCapsLock);
}

TEST(KeyStateTests, setHalfDuplexMask_numLock_halfDuplexNumLockAdded)
{
    MockKeyMap keyMap;
    MockEventQueue eventQueue;
    KeyStateImpl keyState(eventQueue, keyMap);

    EXPECT_CALL(keyMap, addHalfDuplexModifier(kKeyNumLock));

    keyState.setHalfDuplexMask(KeyModifierNumLock);
}

TEST(KeyStateTests, setHalfDuplexMask_scrollLock_halfDuplexScollLockAdded)
{
    MockKeyMap keyMap;
    MockEventQueue eventQueue;
    KeyStateImpl keyState(eventQueue, keyMap);

    EXPECT_CALL(keyMap, addHalfDuplexModifier(kKeyScrollLock));

    keyState.setHalfDuplexMask(KeyModifierScrollLock);
}

TEST(KeyStateTests, fakeKeyDown_serverKeyAlreadyDown_fakeKeyCalledTwice)
{
    NiceMock<MockKeyMap> keyMap;
    MockEventQueue eventQueue;
    KeyStateImpl keyState(eventQueue, keyMap);
    s_stubKeyItem.m_client = 0;
    s_stubKeyItem.m_button = 1;
    ON_CALL(keyMap, mapKey(_, _, _, _, _, _, _)).WillByDefault(Invoke(stubMapKey));

    // 2 calls to fakeKeyDown should still call fakeKey, even though
    // repeated keys are handled differently.
    EXPECT_CALL(keyState, fakeKey(_)).Times(2);

    // call twice to simulate server key already down (a misreported autorepeat).
    keyState.fakeKeyDown(1, 0, 0);
    keyState.fakeKeyDown(1, 0, 0);
}

TEST(KeyStateTests, fakeKeyDown_isIgnoredKey_fakeKeyNotCalled)
{
    MockKeyMap keyMap;
    MockEventQueue eventQueue;
    KeyStateImpl keyState(eventQueue, keyMap);

    EXPECT_CALL(keyState, fakeKey(_)).Times(0);

    keyState.fakeKeyDown(kKeyCapsLock, 0, 0);
}

TEST(KeyStateTests, fakeKeyDown_mapReturnsKeystrokes_fakeKeyCalled)
{
    NiceMock<MockKeyMap> keyMap;
    MockEventQueue eventQueue;
    KeyStateImpl keyState(eventQueue, keyMap);
    s_stubKeyItem.m_button = 0;
    s_stubKeyItem.m_client = 0;
    ON_CALL(keyMap, mapKey(_, _, _, _, _, _, _)).WillByDefault(Invoke(stubMapKey));

    EXPECT_CALL(keyState, fakeKey(_)).Times(1);

    keyState.fakeKeyDown(1, 0, 0);
}

TEST(KeyStateTests, fakeKeyRepeat_invalidKey_returnsFalse)
{
    MockKeyMap keyMap;
    MockEventQueue eventQueue;
    KeyStateImpl keyState(eventQueue, keyMap);

    bool actual = keyState.fakeKeyRepeat(0, 0, 0, 0);

    ASSERT_FALSE(actual);
}

TEST(KeyStateTests, fakeKeyRepeat_nullKey_returnsFalse)
{
    NiceMock<MockKeyMap> keyMap;
    MockEventQueue eventQueue;
    KeyStateImpl keyState(eventQueue, keyMap);

    // set the key to down (we need to make mapKey return a valid key to do this).
    barrier::KeyMap::KeyItem keyItem;
    keyItem.m_client = 0;
    keyItem.m_button = 1;
    ON_CALL(keyMap, mapKey(_, _, _, _, _, _, _)).WillByDefault(Return(&keyItem));
    keyState.fakeKeyDown(1, 0, 0);

    // change mapKey to return NULL so that fakeKeyRepeat exits early.
    barrier::KeyMap::KeyItem* nullKeyItem = NULL;
    ON_CALL(keyMap, mapKey(_, _, _, _, _, _, _)).WillByDefault(Return(nullKeyItem));

    bool actual = keyState.fakeKeyRepeat(1, 0, 0, 0);

    ASSERT_FALSE(actual);
}

TEST(KeyStateTests, fakeKeyRepeat_invalidButton_returnsFalse)
{
    NiceMock<MockKeyMap> keyMap;
    MockEventQueue eventQueue;
    KeyStateImpl keyState(eventQueue, keyMap);

    // set the key to down (we need to make mapKey return a valid key to do this).
    barrier::KeyMap::KeyItem keyItem;
    keyItem.m_client = 0;
    keyItem.m_button = 1; // set to 1 to make fakeKeyDown work.
    ON_CALL(keyMap, mapKey(_, _, _, _, _, _, _)).WillByDefault(Return(&keyItem));
    keyState.fakeKeyDown(1, 0, 0);

    // change button to 0 so that fakeKeyRepeat will return early.
    keyItem.m_button = 0;
    ON_CALL(keyMap, mapKey(_, _, _, _, _, _, _)).WillByDefault(Return(&keyItem));

    bool actual = keyState.fakeKeyRepeat(1, 0, 0, 0);

    ASSERT_FALSE(actual);
}

TEST(KeyStateTests, fakeKeyRepeat_validKey_returnsTrue)
{
    NiceMock<MockKeyMap> keyMap;
    MockEventQueue eventQueue;
    KeyStateImpl keyState(eventQueue, keyMap);
    s_stubKeyItem.m_client = 0;
    s_stubKeystroke.m_type = barrier::KeyMap::Keystroke::kButton;
    s_stubKeystroke.m_data.m_button.m_button = 2;

    // set the button to 1 for fakeKeyDown call
    s_stubKeyItem.m_button = 1;
    ON_CALL(keyMap, mapKey(_, _, _, _, _, _, _)).WillByDefault(Invoke(stubMapKey));
    keyState.fakeKeyDown(1, 0, 0);

    // change the button to 2
    s_stubKeyItem.m_button = 2;
    ON_CALL(keyMap, mapKey(_, _, _, _, _, _, _)).WillByDefault(Invoke(stubMapKey));

    bool actual = keyState.fakeKeyRepeat(1, 0, 0, 0);

    ASSERT_TRUE(actual);
}

TEST(KeyStateTests, fakeKeyUp_buttonNotDown_returnsFalse)
{
    MockKeyMap keyMap;
    MockEventQueue eventQueue;
    KeyStateImpl keyState(eventQueue, keyMap);

    bool actual = keyState.fakeKeyUp(0);

    ASSERT_FALSE(actual);
}

TEST(KeyStateTests, fakeKeyUp_buttonAlreadyDown_returnsTrue)
{
    NiceMock<MockKeyMap> keyMap;
    MockEventQueue eventQueue;
    KeyStateImpl keyState(eventQueue, keyMap);

    // press alt down so we get full coverage.
    ON_CALL(keyState, pollActiveModifiers()).WillByDefault(Return(KeyModifierAlt));
    keyState.updateKeyState();

    // press button 1 down.
    s_stubKeyItem.m_button = 1;
    ON_CALL(keyMap, mapKey(_, _, _, _, _, _, _)).WillByDefault(Invoke(stubMapKey));
    keyState.fakeKeyDown(1, 0, 1);

    // this takes the button id, which is the 3rd arg of fakeKeyDown
    bool actual = keyState.fakeKeyUp(1);

    ASSERT_TRUE(actual);
}

TEST(KeyStateTests, fakeAllKeysUp_keysWereDown_keysAreUp)
{
    NiceMock<MockKeyMap> keyMap;
    MockEventQueue eventQueue;
    KeyStateImpl keyState(eventQueue, keyMap);

    // press button 1 down.
    s_stubKeyItem.m_button = 1;
    ON_CALL(keyMap, mapKey(_, _, _, _, _, _, _)).WillByDefault(Invoke(stubMapKey));
    keyState.fakeKeyDown(1, 0, 1);

    // method under test
    keyState.fakeAllKeysUp();

    bool actual = keyState.isKeyDown(1);
    ASSERT_FALSE(actual);
}

TEST(KeyStateTests, isKeyDown_keyDown_returnsTrue)
{
    NiceMock<MockKeyMap> keyMap;
    MockEventQueue eventQueue;
    KeyStateImpl keyState(eventQueue, keyMap);

    // press button 1 down.
    s_stubKeyItem.m_button = 1;
    ON_CALL(keyMap, mapKey(_, _, _, _, _, _, _)).WillByDefault(Invoke(stubMapKey));
    keyState.fakeKeyDown(1, 0, 1);

    // method under test
    bool actual = keyState.isKeyDown(1);

    ASSERT_TRUE(actual);
}

TEST(KeyStateTests, isKeyDown_noKeysDown_returnsFalse)
{
    MockKeyMap keyMap;
    MockEventQueue eventQueue;
    KeyStateImpl keyState(eventQueue, keyMap);

    // method under test
    bool actual = keyState.isKeyDown(1);

    ASSERT_FALSE(actual);
}

void
stubPollPressedKeys(IKeyState::KeyButtonSet& pressedKeys)
{
    pressedKeys.insert(1);
}

void
assertMaskIsOne(ForeachKeyCallback cb, void* userData)
{
    ASSERT_EQ(1, ((KeyState::AddActiveModifierContext*)userData)->m_mask);
}

const barrier::KeyMap::KeyItem*
stubMapKey(
    barrier::KeyMap::Keystrokes& keys, KeyID id, SInt32 group,
    barrier::KeyMap::ModifierToKeys& activeModifiers,
    KeyModifierMask& currentState,
    KeyModifierMask desiredMask,
    bool isAutoRepeat)
{
    keys.push_back(s_stubKeystroke);
    return &s_stubKeyItem;
}
