/*
  Simple DirectMedia Layer
  Copyright (C) 1997-2026 Sam Lantinga <slouken@libsdl.org>

  This software is provided 'as-is', without any express or implied
  warranty.  In no event will the authors be held liable for any damages
  arising from the use of this software.

  Permission is granted to anyone to use this software for any purpose,
  including commercial applications, and to alter it and redistribute it
  freely, subject to the following restrictions:

  1. The origin of this software must not be misrepresented; you must not
     claim that you wrote the original software. If you use this software
     in a product, an acknowledgment in the product documentation would be
     appreciated but is not required.
  2. Altered source versions must be plainly marked as such, and must not be
     misrepresented as being the original software.
  3. This notice may not be removed or altered from any source distribution.
*/
#include "SDL_internal.h"

#ifdef SDL_VIDEO_DRIVER_ANDROID

// Android SDL video driver implementation

#include "../SDL_sysvideo.h"
#include "../SDL_pixels_c.h"
#include "../../events/SDL_events_c.h"
#include "../../events/SDL_windowevents_c.h"
#include "../../SDL_hints_c.h"

#include "SDL_androidvideo.h"
#include "SDL_androidgl.h"
#include "SDL_androidclipboard.h"
#include "SDL_androidevents.h"
#include "SDL_androidkeyboard.h"
#include "SDL_androidmouse.h"
#include "SDL_androidtouch.h"
#include "SDL_androidwindow.h"
#include "SDL_androidvulkan.h"
#include "SDL_androidmessagebox.h"

#define ANDROID_VID_DRIVER_NAME "android"

// Initialization/Query functions
static bool Android_VideoInit(SDL_VideoDevice *_this);
static void Android_VideoQuit(SDL_VideoDevice *_this);

#include "../SDL_egl_c.h"
#define Android_GLES_GetProcAddress  SDL_EGL_GetProcAddressInternal
#define Android_GLES_UnloadLibrary   SDL_EGL_UnloadLibrary
#define Android_GLES_SetSwapInterval SDL_EGL_SetSwapInterval
#define Android_GLES_GetSwapInterval SDL_EGL_GetSwapInterval
#define Android_GLES_DestroyContext   SDL_EGL_DestroyContext

// Android driver bootstrap functions

// These are filled in with real values in Android_SetScreenResolution on init (before SDL_main())
int Android_SurfaceWidth = 0;
int Android_SurfaceHeight = 0;
static int Android_DeviceWidth = 0;
static int Android_DeviceHeight = 0;
static Uint32 Android_ScreenFormat = SDL_PIXELFORMAT_RGB565; // Default SurfaceView format, in case this is queried before being filled
float Android_ScreenDensity = 1.0f;
static float Android_ScreenRate = 0.0f;
static SDL_DisplayOrientation Android_ScreenOrientation = SDL_ORIENTATION_UNKNOWN;
int Android_SafeInsetLeft = 0;
int Android_SafeInsetRight = 0;
int Android_SafeInsetTop = 0;
int Android_SafeInsetBottom = 0;
static SDL_SystemTheme Android_SystemTheme;

static bool Android_SuspendScreenSaver(SDL_VideoDevice *_this)
{
    return Android_JNI_SuspendScreenSaver(_this->suspend_screensaver);
}

static void Android_DeleteDevice(SDL_VideoDevice *device)
{
    SDL_free(device->internal);
    SDL_free(device);
}

// Input is part of video for Android, so this goes here.
static void SDLCALL Android_Video_InternalHintCallback(
    void *userdata,
    const char *name,
    const char *oldvalue,
    const char *newvalue)
{
    Android_JNI_SetBackButtonTrapActive(SDL_GetStringBoolean(newvalue, false));
}

static SDL_VideoDevice *Android_CreateDevice(void)
{
    SDL_VideoDevice *device;
    SDL_VideoData *data;

    // Initialize all variables that we clean on shutdown
    device = (SDL_VideoDevice *)SDL_calloc(1, sizeof(SDL_VideoDevice));
    if (!device) {
        return NULL;
    }

    data = (SDL_VideoData *)SDL_calloc(1, sizeof(SDL_VideoData));
    if (!data) {
        SDL_free(device);
        return NULL;
    }

    device->internal = data;
    device->system_theme = Android_SystemTheme;

    // Set the function pointers
    device->VideoInit = Android_VideoInit;
    device->VideoQuit = Android_VideoQuit;

    device->CreateSDLWindow = Android_CreateWindow;
    device->SetWindowTitle = Android_SetWindowTitle;
    device->SetWindowFullscreen = Android_SetWindowFullscreen;
    device->MinimizeWindow = Android_MinimizeWindow;
    device->SetWindowResizable = Android_SetWindowResizable;
    device->DestroyWindow = Android_DestroyWindow;

    device->free = Android_DeleteDevice;

    // GL pointers
#ifdef SDL_VIDEO_OPENGL_EGL
    device->GL_LoadLibrary = Android_GLES_LoadLibrary;
    device->GL_GetProcAddress = Android_GLES_GetProcAddress;
    device->GL_UnloadLibrary = Android_GLES_UnloadLibrary;
    device->GL_CreateContext = Android_GLES_CreateContext;
    device->GL_MakeCurrent = Android_GLES_MakeCurrent;
    device->GL_SetSwapInterval = Android_GLES_SetSwapInterval;
    device->GL_GetSwapInterval = Android_GLES_GetSwapInterval;
    device->GL_SwapWindow = Android_GLES_SwapWindow;
    device->GL_DestroyContext = Android_GLES_DestroyContext;
#endif

#ifdef SDL_VIDEO_VULKAN
    device->Vulkan_LoadLibrary = Android_Vulkan_LoadLibrary;
    device->Vulkan_UnloadLibrary = Android_Vulkan_UnloadLibrary;
    device->Vulkan_GetInstanceExtensions = Android_Vulkan_GetInstanceExtensions;
    device->Vulkan_CreateSurface = Android_Vulkan_CreateSurface;
    device->Vulkan_DestroySurface = Android_Vulkan_DestroySurface;
#endif

    // Screensaver
    device->SuspendScreenSaver = Android_SuspendScreenSaver;

    // Screen keyboard
    device->HasScreenKeyboardSupport = Android_HasScreenKeyboardSupport;
    device->ShowScreenKeyboard = Android_ShowScreenKeyboard;
    device->HideScreenKeyboard = Android_HideScreenKeyboard;

    // Clipboard
    device->SetClipboardText = Android_SetClipboardText;
    device->GetClipboardText = Android_GetClipboardText;
    device->HasClipboardText = Android_HasClipboardText;

    device->device_caps = VIDEO_DEVICE_CAPS_SENDS_FULLSCREEN_DIMENSIONS;

    return device;
}

VideoBootStrap Android_bootstrap = {
    ANDROID_VID_DRIVER_NAME, "SDL Android video driver",
    Android_CreateDevice,
    Android_ShowMessageBox,
    false
};

bool Android_VideoInit(SDL_VideoDevice *_this)
{
    SDL_VideoData *videodata = _this->internal;
    SDL_DisplayID displayID;
    SDL_VideoDisplay *display;
    SDL_DisplayMode mode;

    videodata->isPaused = false;
    videodata->isPausing = false;

    SDL_zero(mode);
    mode.format = Android_ScreenFormat;
    mode.w = Android_DeviceWidth;
    mode.h = Android_DeviceHeight;
    mode.refresh_rate = Android_ScreenRate;

    displayID = SDL_AddBasicVideoDisplay(&mode);
    if (displayID == 0) {
        return false;
    }
    display = SDL_GetVideoDisplay(displayID);
    display->natural_orientation = Android_JNI_GetDisplayNaturalOrientation();
    display->current_orientation = Android_JNI_GetDisplayCurrentOrientation();
    display->content_scale = Android_ScreenDensity;

    SDL_AddHintCallback(SDL_HINT_ANDROID_TRAP_BACK_BUTTON, Android_Video_InternalHintCallback, 0);

    Android_InitTouch();

    Android_InitMouse();

    // We're done!
    return true;
}

void Android_VideoQuit(SDL_VideoDevice *_this)
{
    SDL_RemoveHintCallback(SDL_HINT_ANDROID_TRAP_BACK_BUTTON, Android_Video_InternalHintCallback, 0);
    Android_QuitMouse();
    Android_QuitTouch();
}

void Android_SetScreenResolution(int surfaceWidth, int surfaceHeight, int deviceWidth, int deviceHeight, float density, float rate)
{
    Android_SurfaceWidth = surfaceWidth;
    Android_SurfaceHeight = surfaceHeight;
    Android_DeviceWidth = deviceWidth;
    Android_DeviceHeight = deviceHeight;
    Android_ScreenDensity = (density > 0.0f) ? density : 1.0f;
    Android_ScreenRate = rate;
}

static Uint32 format_to_pixelFormat(int format)
{
    Uint32 pf;
    if (format == AHARDWAREBUFFER_FORMAT_R8G8B8A8_UNORM) { // 1
        pf = SDL_PIXELFORMAT_RGBA8888;
    } else if (format == AHARDWAREBUFFER_FORMAT_R8G8B8X8_UNORM) { // 2
        pf = SDL_PIXELFORMAT_RGBX8888;
    } else if (format == AHARDWAREBUFFER_FORMAT_R8G8B8_UNORM) { // 3
        pf = SDL_PIXELFORMAT_RGB24;
    } else if (format == AHARDWAREBUFFER_FORMAT_R5G6B5_UNORM) { // 4
        pf = SDL_PIXELFORMAT_RGB565;
    } else if (format == 5) {
        pf = SDL_PIXELFORMAT_BGRA8888;
    } else if (format == 6) {
        pf = SDL_PIXELFORMAT_RGBA5551;
    } else if (format == 7) {
        pf = SDL_PIXELFORMAT_RGBA4444;
    } else if (format == 0x115) {
        // HAL_PIXEL_FORMAT_BGR_565
        pf = SDL_PIXELFORMAT_RGB565;
    } else {
        pf = SDL_PIXELFORMAT_UNKNOWN;
    }
    return pf;
}

void Android_SetFormat(int format_wanted, int format_got)
{
    Uint32 pf_wanted;
    Uint32 pf_got;

    pf_wanted = format_to_pixelFormat(format_wanted);
    pf_got = format_to_pixelFormat(format_got);

    Android_ScreenFormat = pf_got;

    SDL_Log("pixel format wanted %s (%d), got %s (%d)",
            SDL_GetPixelFormatName(pf_wanted), format_wanted,
            SDL_GetPixelFormatName(pf_got), format_got);
}

static void Android_SendOrientationUpdate(void)
{
    /* If we've received a compatible resize event, update the
     * orientation immediately, otherwise wait for the display
     * resize event.
     */
    SDL_VideoDevice *device = SDL_GetVideoDevice();
    if (device && device->num_displays > 0) {
        SDL_VideoDisplay *display = device->displays[0];
        bool mode_landscape = (display->desktop_mode.w > display->desktop_mode.h);
        bool sensor_landscape = (Android_ScreenOrientation == SDL_ORIENTATION_LANDSCAPE || Android_ScreenOrientation == SDL_ORIENTATION_LANDSCAPE_FLIPPED);
        if (sensor_landscape == mode_landscape) {
            SDL_SendDisplayEvent(display, SDL_EVENT_DISPLAY_ORIENTATION, Android_ScreenOrientation, 0);
        }
    }
}

void Android_SetOrientation(SDL_DisplayOrientation orientation)
{
    Android_ScreenOrientation = orientation;
    Android_SendOrientationUpdate();
}

void Android_SendResize(SDL_Window *window)
{
    /*
      Update the resolution of the desktop mode, so that the window
      can be properly resized. The screen resolution change can for
      example happen when the Activity enters or exits immersive mode,
      which can happen after VideoInit().
    */
    SDL_VideoDevice *device = SDL_GetVideoDevice();
    if (device && device->num_displays > 0) {
        SDL_VideoDisplay *display = device->displays[0];
        SDL_DisplayMode desktop_mode;

        SDL_zero(desktop_mode);
        desktop_mode.format = Android_ScreenFormat;
        desktop_mode.w = Android_DeviceWidth;
        desktop_mode.h = Android_DeviceHeight;
        desktop_mode.refresh_rate = Android_ScreenRate;
        SDL_SetDesktopDisplayMode(display, &desktop_mode);
        Android_SendOrientationUpdate();
    }

    if (window) {
        SDL_SendWindowEvent(window, SDL_EVENT_WINDOW_RESIZED, Android_SurfaceWidth, Android_SurfaceHeight);
    }
}

void Android_SetWindowSafeAreaInsets(int left, int right, int top, int bottom)
{
    Android_SafeInsetLeft = left;
    Android_SafeInsetRight = right;
    Android_SafeInsetTop = top;
    Android_SafeInsetBottom = bottom;

    if (Android_Window) {
        SDL_SetWindowSafeAreaInsets(Android_Window, left, right, top, bottom);
    }
}

void Android_SetDarkMode(bool enabled)
{
    SDL_VideoDevice *device = SDL_GetVideoDevice();

    if (enabled) {
        Android_SystemTheme = SDL_SYSTEM_THEME_DARK;
    } else {
        Android_SystemTheme = SDL_SYSTEM_THEME_LIGHT;
    }

    if (device) {
        SDL_SetSystemTheme(Android_SystemTheme);
    }
}

#endif // SDL_VIDEO_DRIVER_ANDROID
