/**
 * 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: %i", 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: %i", 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: %i", 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: %i", 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: %i", 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: %i", 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: %i", 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: %i", 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
};
