/**
 * Mouse test suite
 */

#include <stdio.h>
#include <limits.h>

#include "SDL.h"
#include "SDL_test.h"

/* ================= Test Case Implementation ================== */

/* Test case functions */

/* Helper to evaluate state returned from SDL_GetMouseState */
int _mouseStateCheck(Uint32 state)
{
    return (state == 0) ||
           (state == SDL_BUTTON(SDL_BUTTON_LEFT)) ||
           (state == SDL_BUTTON(SDL_BUTTON_MIDDLE)) ||
           (state == SDL_BUTTON(SDL_BUTTON_RIGHT)) ||
           (state == SDL_BUTTON(SDL_BUTTON_X1)) ||
           (state == SDL_BUTTON(SDL_BUTTON_X2));
}

/**
 * @brief Check call to SDL_GetMouseState
 *
 */
int mouse_getMouseState(void *arg)
{
    int x;
    int y;
    Uint32 state;

    /* Pump some events to update mouse state */
    SDL_PumpEvents();
    SDLTest_AssertPass("Call to SDL_PumpEvents()");

    /* Case where x, y pointer is NULL */
    state = SDL_GetMouseState(NULL, NULL);
    SDLTest_AssertPass("Call to SDL_GetMouseState(NULL, NULL)");
    SDLTest_AssertCheck(_mouseStateCheck(state), "Validate state returned from function, got: %" SDL_PRIu32, state);

    /* Case where x pointer is not NULL */
    x = INT_MIN;
    state = SDL_GetMouseState(&x, NULL);
    SDLTest_AssertPass("Call to SDL_GetMouseState(&x, NULL)");
    SDLTest_AssertCheck(x > INT_MIN, "Validate that value of x is > INT_MIN, got: %i", x);
    SDLTest_AssertCheck(_mouseStateCheck(state), "Validate state returned from function, got: %" SDL_PRIu32, state);

    /* Case where y pointer is not NULL */
    y = INT_MIN;
    state = SDL_GetMouseState(NULL, &y);
    SDLTest_AssertPass("Call to SDL_GetMouseState(NULL, &y)");
    SDLTest_AssertCheck(y > INT_MIN, "Validate that value of y is > INT_MIN, got: %i", y);
    SDLTest_AssertCheck(_mouseStateCheck(state), "Validate state returned from function, got: %" SDL_PRIu32, state);

    /* Case where x and y pointer is not NULL */
    x = INT_MIN;
    y = INT_MIN;
    state = SDL_GetMouseState(&x, &y);
    SDLTest_AssertPass("Call to SDL_GetMouseState(&x, &y)");
    SDLTest_AssertCheck(x > INT_MIN, "Validate that value of x is > INT_MIN, got: %i", x);
    SDLTest_AssertCheck(y > INT_MIN, "Validate that value of y is > INT_MIN, got: %i", y);
    SDLTest_AssertCheck(_mouseStateCheck(state), "Validate state returned from function, got: %" SDL_PRIu32, state);

    return TEST_COMPLETED;
}

/**
 * @brief Check call to SDL_GetRelativeMouseState
 *
 */
int mouse_getRelativeMouseState(void *arg)
{
    int x;
    int y;
    Uint32 state;

    /* Pump some events to update mouse state */
    SDL_PumpEvents();
    SDLTest_AssertPass("Call to SDL_PumpEvents()");

    /* Case where x, y pointer is NULL */
    state = SDL_GetRelativeMouseState(NULL, NULL);
    SDLTest_AssertPass("Call to SDL_GetRelativeMouseState(NULL, NULL)");
    SDLTest_AssertCheck(_mouseStateCheck(state), "Validate state returned from function, got: %" SDL_PRIu32, state);

    /* Case where x pointer is not NULL */
    x = INT_MIN;
    state = SDL_GetRelativeMouseState(&x, NULL);
    SDLTest_AssertPass("Call to SDL_GetRelativeMouseState(&x, NULL)");
    SDLTest_AssertCheck(x > INT_MIN, "Validate that value of x is > INT_MIN, got: %i", x);
    SDLTest_AssertCheck(_mouseStateCheck(state), "Validate state returned from function, got: %" SDL_PRIu32, state);

    /* Case where y pointer is not NULL */
    y = INT_MIN;
    state = SDL_GetRelativeMouseState(NULL, &y);
    SDLTest_AssertPass("Call to SDL_GetRelativeMouseState(NULL, &y)");
    SDLTest_AssertCheck(y > INT_MIN, "Validate that value of y is > INT_MIN, got: %i", y);
    SDLTest_AssertCheck(_mouseStateCheck(state), "Validate state returned from function, got: %" SDL_PRIu32, state);

    /* Case where x and y pointer is not NULL */
    x = INT_MIN;
    y = INT_MIN;
    state = SDL_GetRelativeMouseState(&x, &y);
    SDLTest_AssertPass("Call to SDL_GetRelativeMouseState(&x, &y)");
    SDLTest_AssertCheck(x > INT_MIN, "Validate that value of x is > INT_MIN, got: %i", x);
    SDLTest_AssertCheck(y > INT_MIN, "Validate that value of y is > INT_MIN, got: %i", y);
    SDLTest_AssertCheck(_mouseStateCheck(state), "Validate state returned from function, got: %" SDL_PRIu32, state);

    return TEST_COMPLETED;
}

/* XPM definition of mouse Cursor */
static const char *_mouseArrowData[] = {
    /* pixels */
    "X                               ",
    "XX                              ",
    "X.X                             ",
    "X..X                            ",
    "X...X                           ",
    "X....X                          ",
    "X.....X                         ",
    "X......X                        ",
    "X.......X                       ",
    "X........X                      ",
    "X.....XXXXX                     ",
    "X..X..X                         ",
    "X.X X..X                        ",
    "XX  X..X                        ",
    "X    X..X                       ",
    "     X..X                       ",
    "      X..X                      ",
    "      X..X                      ",
    "       XX                       ",
    "                                ",
    "                                ",
    "                                ",
    "                                ",
    "                                ",
    "                                ",
    "                                ",
    "                                ",
    "                                ",
    "                                ",
    "                                ",
    "                                ",
    "                                "
};

/* Helper that creates a new mouse cursor from an XPM */
static SDL_Cursor *_initArrowCursor(const char *image[])
{
    SDL_Cursor *cursor;
    int i, row, col;
    Uint8 data[4 * 32];
    Uint8 mask[4 * 32];

    i = -1;
    for (row = 0; row < 32; ++row) {
        for (col = 0; col < 32; ++col) {
            if (col % 8) {
                data[i] <<= 1;
                mask[i] <<= 1;
            } else {
                ++i;
                data[i] = mask[i] = 0;
            }
            switch (image[row][col]) {
            case 'X':
                data[i] |= 0x01;
                mask[i] |= 0x01;
                break;
            case '.':
                mask[i] |= 0x01;
                break;
            case ' ':
                break;
            }
        }
    }

    cursor = SDL_CreateCursor(data, mask, 32, 32, 0, 0);
    return cursor;
}

/**
 * @brief Check call to SDL_CreateCursor and SDL_FreeCursor
 *
 * @sa http://wiki.libsdl.org/SDL_CreateCursor
 * @sa http://wiki.libsdl.org/SDL_FreeCursor
 */
int mouse_createFreeCursor(void *arg)
{
    SDL_Cursor *cursor;

    /* Create a cursor */
    cursor = _initArrowCursor(_mouseArrowData);
    SDLTest_AssertPass("Call to SDL_CreateCursor()");
    SDLTest_AssertCheck(cursor != NULL, "Validate result from SDL_CreateCursor() is not NULL");
    if (cursor == NULL) {
        return TEST_ABORTED;
    }

    /* Free cursor again */
    SDL_FreeCursor(cursor);
    SDLTest_AssertPass("Call to SDL_FreeCursor()");

    return TEST_COMPLETED;
}

/**
 * @brief Check call to SDL_CreateColorCursor and SDL_FreeCursor
 *
 * @sa http://wiki.libsdl.org/SDL_CreateColorCursor
 * @sa http://wiki.libsdl.org/SDL_FreeCursor
 */
int mouse_createFreeColorCursor(void *arg)
{
    SDL_Surface *face;
    SDL_Cursor *cursor;

    /* Get sample surface */
    face = SDLTest_ImageFace();
    SDLTest_AssertCheck(face != NULL, "Validate sample input image is not NULL");
    if (face == NULL) {
        return TEST_ABORTED;
    }

    /* Create a color cursor from surface */
    cursor = SDL_CreateColorCursor(face, 0, 0);
    SDLTest_AssertPass("Call to SDL_CreateColorCursor()");
    SDLTest_AssertCheck(cursor != NULL, "Validate result from SDL_CreateColorCursor() is not NULL");
    if (cursor == NULL) {
        SDL_FreeSurface(face);
        return TEST_ABORTED;
    }

    /* Free cursor again */
    SDL_FreeCursor(cursor);
    SDLTest_AssertPass("Call to SDL_FreeCursor()");

    /* Clean up */
    SDL_FreeSurface(face);

    return TEST_COMPLETED;
}

/* Helper that changes cursor visibility */
void _changeCursorVisibility(int state)
{
    int oldState;
    int newState;
    int result;

    oldState = SDL_ShowCursor(SDL_QUERY);
    SDLTest_AssertPass("Call to SDL_ShowCursor(SDL_QUERY)");

    result = SDL_ShowCursor(state);
    SDLTest_AssertPass("Call to SDL_ShowCursor(%s)", (state == SDL_ENABLE) ? "SDL_ENABLE" : "SDL_DISABLE");
    SDLTest_AssertCheck(result == oldState, "Validate result from SDL_ShowCursor(%s), expected: %i, got: %i",
                        (state == SDL_ENABLE) ? "SDL_ENABLE" : "SDL_DISABLE", oldState, result);

    newState = SDL_ShowCursor(SDL_QUERY);
    SDLTest_AssertPass("Call to SDL_ShowCursor(SDL_QUERY)");
    SDLTest_AssertCheck(state == newState, "Validate new state, expected: %i, got: %i",
                        state, newState);
}

/**
 * @brief Check call to SDL_ShowCursor
 *
 * @sa http://wiki.libsdl.org/SDL_ShowCursor
 */
int mouse_showCursor(void *arg)
{
    int currentState;

    /* Get current state */
    currentState = SDL_ShowCursor(SDL_QUERY);
    SDLTest_AssertPass("Call to SDL_ShowCursor(SDL_QUERY)");
    SDLTest_AssertCheck(currentState == SDL_DISABLE || currentState == SDL_ENABLE,
                        "Validate result is %i or %i, got: %i", SDL_DISABLE, SDL_ENABLE, currentState);
    if (currentState == SDL_DISABLE) {
        /* Show the cursor, then hide it again */
        _changeCursorVisibility(SDL_ENABLE);
        _changeCursorVisibility(SDL_DISABLE);
    } else if (currentState == SDL_ENABLE) {
        /* Hide the cursor, then show it again */
        _changeCursorVisibility(SDL_DISABLE);
        _changeCursorVisibility(SDL_ENABLE);
    } else {
        return TEST_ABORTED;
    }

    return TEST_COMPLETED;
}

/**
 * @brief Check call to SDL_SetCursor
 *
 * @sa http://wiki.libsdl.org/SDL_SetCursor
 */
int mouse_setCursor(void *arg)
{
    SDL_Cursor *cursor;

    /* Create a cursor */
    cursor = _initArrowCursor(_mouseArrowData);
    SDLTest_AssertPass("Call to SDL_CreateCursor()");
    SDLTest_AssertCheck(cursor != NULL, "Validate result from SDL_CreateCursor() is not NULL");
    if (cursor == NULL) {
        return TEST_ABORTED;
    }

    /* Set the arrow cursor */
    SDL_SetCursor(cursor);
    SDLTest_AssertPass("Call to SDL_SetCursor(cursor)");

    /* Force redraw */
    SDL_SetCursor(NULL);
    SDLTest_AssertPass("Call to SDL_SetCursor(NULL)");

    /* Free cursor again */
    SDL_FreeCursor(cursor);
    SDLTest_AssertPass("Call to SDL_FreeCursor()");

    return TEST_COMPLETED;
}

/**
 * @brief Check call to SDL_GetCursor
 *
 * @sa http://wiki.libsdl.org/SDL_GetCursor
 */
int mouse_getCursor(void *arg)
{
    SDL_Cursor *cursor;

    /* Get current cursor */
    cursor = SDL_GetCursor();
    SDLTest_AssertPass("Call to SDL_GetCursor()");
    SDLTest_AssertCheck(cursor != NULL, "Validate result from SDL_GetCursor() is not NULL");

    return TEST_COMPLETED;
}

/**
 * @brief Check call to SDL_GetRelativeMouseMode and SDL_SetRelativeMouseMode
 *
 * @sa http://wiki.libsdl.org/SDL_GetRelativeMouseMode
 * @sa http://wiki.libsdl.org/SDL_SetRelativeMouseMode
 */
int mouse_getSetRelativeMouseMode(void *arg)
{
    int result;
    int i;
    SDL_bool initialState;
    SDL_bool currentState;

    /* Capture original state so we can revert back to it later */
    initialState = SDL_GetRelativeMouseMode();
    SDLTest_AssertPass("Call to SDL_GetRelativeMouseMode()");

    /* Repeat twice to check D->D transition */
    for (i = 0; i < 2; i++) {
        /* Disable - should always be supported */
        result = SDL_SetRelativeMouseMode(SDL_FALSE);
        SDLTest_AssertPass("Call to SDL_SetRelativeMouseMode(FALSE)");
        SDLTest_AssertCheck(result == 0, "Validate result value from SDL_SetRelativeMouseMode, expected: 0, got: %i", result);
        currentState = SDL_GetRelativeMouseMode();
        SDLTest_AssertPass("Call to SDL_GetRelativeMouseMode()");
        SDLTest_AssertCheck(currentState == SDL_FALSE, "Validate current state is FALSE, got: %i", currentState);
    }

    /* Repeat twice to check D->E->E transition */
    for (i = 0; i < 2; i++) {
        /* Enable - may not be supported */
        result = SDL_SetRelativeMouseMode(SDL_TRUE);
        SDLTest_AssertPass("Call to SDL_SetRelativeMouseMode(TRUE)");
        if (result != -1) {
            SDLTest_AssertCheck(result == 0, "Validate result value from SDL_SetRelativeMouseMode, expected: 0, got: %i", result);
            currentState = SDL_GetRelativeMouseMode();
            SDLTest_AssertPass("Call to SDL_GetRelativeMouseMode()");
            SDLTest_AssertCheck(currentState == SDL_TRUE, "Validate current state is TRUE, got: %i", currentState);
        }
    }

    /* Disable to check E->D transition */
    result = SDL_SetRelativeMouseMode(SDL_FALSE);
    SDLTest_AssertPass("Call to SDL_SetRelativeMouseMode(FALSE)");
    SDLTest_AssertCheck(result == 0, "Validate result value from SDL_SetRelativeMouseMode, expected: 0, got: %i", result);
    currentState = SDL_GetRelativeMouseMode();
    SDLTest_AssertPass("Call to SDL_GetRelativeMouseMode()");
    SDLTest_AssertCheck(currentState == SDL_FALSE, "Validate current state is FALSE, got: %i", currentState);

    /* Revert to original state - ignore result */
    result = SDL_SetRelativeMouseMode(initialState);

    return TEST_COMPLETED;
}

#define MOUSE_TESTWINDOW_WIDTH  320
#define MOUSE_TESTWINDOW_HEIGHT 200

/**
 * Creates a test window
 */
SDL_Window *_createMouseSuiteTestWindow()
{
    int posX = 100, posY = 100, width = MOUSE_TESTWINDOW_WIDTH, height = MOUSE_TESTWINDOW_HEIGHT;
    SDL_Window *window;
    window = SDL_CreateWindow("mouse_createMouseSuiteTestWindow", posX, posY, width, height, 0);
    SDLTest_AssertPass("SDL_CreateWindow()");
    SDLTest_AssertCheck(window != NULL, "Check SDL_CreateWindow result");
    return window;
}

/*
 * Destroy test window
 */
void _destroyMouseSuiteTestWindow(SDL_Window *window)
{
    if (window != NULL) {
        SDL_DestroyWindow(window);
        window = NULL;
        SDLTest_AssertPass("SDL_DestroyWindow()");
    }
}

/**
 * @brief Check call to SDL_WarpMouseInWindow
 *
 * @sa http://wiki.libsdl.org/SDL_WarpMouseInWindow
 */
int mouse_warpMouseInWindow(void *arg)
{
    const int w = MOUSE_TESTWINDOW_WIDTH, h = MOUSE_TESTWINDOW_HEIGHT;
    int numPositions = 6;
    int xPositions[6];
    int yPositions[6];
    int x, y, i, j;
    SDL_Window *window;

    xPositions[0] = -1;
    xPositions[1] = 0;
    xPositions[2] = 1;
    xPositions[3] = w - 1;
    xPositions[4] = w;
    xPositions[5] = w + 1;
    yPositions[0] = -1;
    yPositions[1] = 0;
    yPositions[2] = 1;
    yPositions[3] = h - 1;
    yPositions[4] = h;
    yPositions[5] = h + 1;
    /* Create test window */
    window = _createMouseSuiteTestWindow();
    if (window == NULL) {
        return TEST_ABORTED;
    }

    /* Mouse to random position inside window */
    x = SDLTest_RandomIntegerInRange(1, w - 1);
    y = SDLTest_RandomIntegerInRange(1, h - 1);
    SDL_WarpMouseInWindow(window, x, y);
    SDLTest_AssertPass("SDL_WarpMouseInWindow(...,%i,%i)", x, y);

    /* Same position again */
    SDL_WarpMouseInWindow(window, x, y);
    SDLTest_AssertPass("SDL_WarpMouseInWindow(...,%i,%i)", x, y);

    /* Mouse to various boundary positions */
    for (i = 0; i < numPositions; i++) {
        for (j = 0; j < numPositions; j++) {
            x = xPositions[i];
            y = yPositions[j];
            SDL_WarpMouseInWindow(window, x, y);
            SDLTest_AssertPass("SDL_WarpMouseInWindow(...,%i,%i)", x, y);

            /* TODO: add tracking of events and check that each call generates a mouse motion event */
            SDL_PumpEvents();
            SDLTest_AssertPass("SDL_PumpEvents()");
        }
    }

    /* Clean up test window */
    _destroyMouseSuiteTestWindow(window);

    return TEST_COMPLETED;
}

/**
 * @brief Check call to SDL_GetMouseFocus
 *
 * @sa http://wiki.libsdl.org/SDL_GetMouseFocus
 */
int mouse_getMouseFocus(void *arg)
{
    const int w = MOUSE_TESTWINDOW_WIDTH, h = MOUSE_TESTWINDOW_HEIGHT;
    int x, y;
    SDL_Window *window;
    SDL_Window *focusWindow;

    /* Get focus - focus non-deterministic */
    focusWindow = SDL_GetMouseFocus();
    SDLTest_AssertPass("SDL_GetMouseFocus()");

    /* Create test window */
    window = _createMouseSuiteTestWindow();
    if (window == NULL) {
        return TEST_ABORTED;
    }

    /* Mouse to random position inside window */
    x = SDLTest_RandomIntegerInRange(1, w - 1);
    y = SDLTest_RandomIntegerInRange(1, h - 1);
    SDL_WarpMouseInWindow(window, x, y);
    SDLTest_AssertPass("SDL_WarpMouseInWindow(...,%i,%i)", x, y);

    /* Pump events to update focus state */
    SDL_Delay(100);
    SDL_PumpEvents();
    SDLTest_AssertPass("SDL_PumpEvents()");

    /* Get focus with explicit window setup - focus deterministic */
    focusWindow = SDL_GetMouseFocus();
    SDLTest_AssertPass("SDL_GetMouseFocus()");
    SDLTest_AssertCheck(focusWindow != NULL, "Check returned window value is not NULL");
    SDLTest_AssertCheck(focusWindow == window, "Check returned window value is test window");

    /* Mouse to random position outside window */
    x = SDLTest_RandomIntegerInRange(-9, -1);
    y = SDLTest_RandomIntegerInRange(-9, -1);
    SDL_WarpMouseInWindow(window, x, y);
    SDLTest_AssertPass("SDL_WarpMouseInWindow(...,%i,%i)", x, y);

    /* Clean up test window */
    _destroyMouseSuiteTestWindow(window);

    /* Pump events to update focus state */
    SDL_PumpEvents();
    SDLTest_AssertPass("SDL_PumpEvents()");

    /* Get focus for non-existing window */
    focusWindow = SDL_GetMouseFocus();
    SDLTest_AssertPass("SDL_GetMouseFocus()");
    SDLTest_AssertCheck(focusWindow == NULL, "Check returned window value is NULL");

    return TEST_COMPLETED;
}

/* ================= Test References ================== */

/* Mouse test cases */
static const SDLTest_TestCaseReference mouseTest1 = {
    (SDLTest_TestCaseFp)mouse_getMouseState, "mouse_getMouseState", "Check call to SDL_GetMouseState", TEST_ENABLED
};

static const SDLTest_TestCaseReference mouseTest2 = {
    (SDLTest_TestCaseFp)mouse_getRelativeMouseState, "mouse_getRelativeMouseState", "Check call to SDL_GetRelativeMouseState", TEST_ENABLED
};

static const SDLTest_TestCaseReference mouseTest3 = {
    (SDLTest_TestCaseFp)mouse_createFreeCursor, "mouse_createFreeCursor", "Check call to SDL_CreateCursor and SDL_FreeCursor", TEST_ENABLED
};

static const SDLTest_TestCaseReference mouseTest4 = {
    (SDLTest_TestCaseFp)mouse_showCursor, "mouse_showCursor", "Check call to SDL_ShowCursor", TEST_ENABLED
};

static const SDLTest_TestCaseReference mouseTest5 = {
    (SDLTest_TestCaseFp)mouse_setCursor, "mouse_setCursor", "Check call to SDL_SetCursor", TEST_ENABLED
};

static const SDLTest_TestCaseReference mouseTest6 = {
    (SDLTest_TestCaseFp)mouse_getCursor, "mouse_getCursor", "Check call to SDL_GetCursor", TEST_ENABLED
};

static const SDLTest_TestCaseReference mouseTest7 = {
    (SDLTest_TestCaseFp)mouse_warpMouseInWindow, "mouse_warpMouseInWindow", "Check call to SDL_WarpMouseInWindow", TEST_ENABLED
};

static const SDLTest_TestCaseReference mouseTest8 = {
    (SDLTest_TestCaseFp)mouse_getMouseFocus, "mouse_getMouseFocus", "Check call to SDL_getMouseFocus", TEST_ENABLED
};

static const SDLTest_TestCaseReference mouseTest9 = {
    (SDLTest_TestCaseFp)mouse_createFreeColorCursor, "mouse_createFreeColorCursor", "Check call to SDL_CreateColorCursor and SDL_FreeCursor", TEST_ENABLED
};

static const SDLTest_TestCaseReference mouseTest10 = {
    (SDLTest_TestCaseFp)mouse_getSetRelativeMouseMode, "mouse_getSetRelativeMouseMode", "Check call to SDL_GetRelativeMouseMode and SDL_SetRelativeMouseMode", TEST_ENABLED
};

/* Sequence of Mouse test cases */
static const SDLTest_TestCaseReference *mouseTests[] =  {
    &mouseTest1, &mouseTest2, &mouseTest3, &mouseTest4, &mouseTest5, &mouseTest6,
    &mouseTest7, &mouseTest8, &mouseTest9, &mouseTest10, NULL
};

/* Mouse test suite (global) */
SDLTest_TestSuiteReference mouseTestSuite = {
    "Mouse",
    NULL,
    mouseTests,
    NULL
};