/*      _______   __   __   __   ______   __   __   _______   __   __
 *     / _____/\ / /\ / /\ / /\ / ____/\ / /\ / /\ / ___  /\ /  |\/ /\
 *    / /\____\// / // / // / // /\___\// /_// / // /\_/ / // , |/ / /
 *   / / /__   / / // / // / // / /    / ___  / // ___  / // /| ' / /
 *  / /_// /\ / /_// / // / // /_/_   / / // / // /\_/ / // / |  / /
 * /______/ //______/ //_/ //_____/\ /_/ //_/ //_/ //_/ //_/ /|_/ /
 * \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/
 *
 * Copyright (c) 2004, 2005, 2006, 2007 Olof Naessén and Per Larsson
 * Copyright (C) 2007-2010  The Mana World Development Team
 * Copyright (C) 2010-2012  The Mana Developers
 *
 *                                                         Js_./
 * Per Larsson a.k.a finalman                          _RqZ{a<^_aa
 * Olof Naessén a.k.a jansem/yakslem                _asww7!uY`>  )\a//
 *                                                 _Qhm`] _f "'c  1!5m
 * Visit: http://guichan.darkbits.org             )Qk<P ` _: :+' .'  "{[
 *                                               .)j(] .d_/ '-(  P .   S
 * License: (BSD)                                <Td/Z <fP"5(\"??"\a.  .L
 * Redistribution and use in source and          _dV>ws?a-?'      ._/L  #'
 * binary forms, with or without                 )4d[#7r, .   '     )d`)[
 * modification, are permitted provided         _Q-5'5W..j/?'   -?!\)cam'
 * that the following conditions are met:       j<<WP+k/);.        _W=j f
 * 1. Redistributions of source code must       .$%w\/]Q  . ."'  .  mj$
 *    retain the above copyright notice,        ]E.pYY(Q]>.   a     J@\
 *    this list of conditions and the           j(]1u<sE"L,. .   ./^ ]{a
 *    following disclaimer.                     4'_uomm\.  )L);-4     (3=
 * 2. Redistributions in binary form must        )_]X{Z('a_"a7'<a"a,  ]"[
 *    reproduce the above copyright notice,       #}<]m7`Za??4,P-"'7. ).m
 *    this list of conditions and the            ]d2e)Q(<Q(  ?94   b-  LQ/
 *    following disclaimer in the                <B!</]C)d_, '(<' .f. =C+m
 *    documentation and/or other materials      .Z!=J ]e []('-4f _ ) -.)m]'
 *    provided with the distribution.          .w[5]' _[ /.)_-"+?   _/ <W"
 * 3. Neither the name of Guichan nor the      :$we` _! + _/ .        j?
 *    names of its contributors may be used     =3)= _f  (_yQmWW$#(    "
 *    to endorse or promote products derived     -   W,  sQQQQmZQ#Wwa]..
 *    from this software without specific        (js, \[QQW$QWW#?!V"".
 *    prior written permission.                    ]y:.<\..          .
 *                                                 -]n w/ '         [.
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT       )/ )/           !
 * HOLDERS AND CONTRIBUTORS "AS IS" AND ANY         <  (; sac    ,    '
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING,               ]^ .-  %
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF            c <   r
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR            aga<  <La
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE          5%  )P'-3L
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR        _bQf` y`..)a
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,          ,J?4P'.P"_(\?d'.,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES               _Pa,)!f/<[]/  ?"
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT      _2-..:. .r+_,.. .
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,     ?a.<%"'  " -'.a_ _,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION)                     ^
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "sdlinput.h"
#include "graphics.h"

#include <guichan/exception.hpp>

SDLInput::SDLInput() = default;

bool SDLInput::isKeyQueueEmpty()
{
    return mKeyInputQueue.empty();
}

gcn::KeyInput SDLInput::dequeueKeyInput()
{
    gcn::KeyInput keyInput;

    if (mKeyInputQueue.empty())
    {
        throw GCN_EXCEPTION("The queue is empty.");
    }

    keyInput = mKeyInputQueue.front();
    mKeyInputQueue.pop();

    return keyInput;
}

bool SDLInput::isMouseQueueEmpty()
{
    return mMouseInputQueue.empty();
}

gcn::MouseInput SDLInput::dequeueMouseInput()
{
    gcn::MouseInput mouseInput;

    if (mMouseInputQueue.empty())
    {
        throw GCN_EXCEPTION("The queue is empty.");
    }

    mouseInput = mMouseInputQueue.front();
    mMouseInputQueue.pop();

    return mouseInput;
}

bool SDLInput::isTextQueueEmpty() const
{
    return mTextInputQueue.empty();
}

TextInput SDLInput::dequeueTextInput()
{
    if (mTextInputQueue.empty())
    {
        throw GCN_EXCEPTION("The queue is empty.");
    }

    TextInput textInput(mTextInputQueue.front());
    mTextInputQueue.pop();
    return textInput;
}

static void setMouseCoordinates(gcn::MouseInput &mouseInput, int x, int y)
{
    float logicalX;
    float logicalY;
    graphics->windowToLogical(x, y, logicalX, logicalY);
    mouseInput.setX(static_cast<int>(logicalX));
    mouseInput.setY(static_cast<int>(logicalY));
}

void SDLInput::pushInput(SDL_Event event)
{
    gcn::KeyInput keyInput;
    gcn::MouseInput mouseInput;

    switch (event.type)
    {
      case SDL_KEYDOWN:
          keyInput.setKey(gcn::Key(convertKeyCharacter(event)));
          keyInput.setType(gcn::KeyInput::PRESSED);
          keyInput.setShiftPressed(event.key.keysym.mod & KMOD_SHIFT);
          keyInput.setControlPressed(event.key.keysym.mod & KMOD_CTRL);
          keyInput.setAltPressed(event.key.keysym.mod & KMOD_ALT);
          keyInput.setMetaPressed(event.key.keysym.mod & KMOD_GUI);
          keyInput.setNumericPad(event.key.keysym.sym >= SDLK_KP_0
                                 && event.key.keysym.sym <= SDLK_KP_EQUALS);

          mKeyInputQueue.push(keyInput);
          break;

      case SDL_KEYUP:
          keyInput.setKey(gcn::Key(convertKeyCharacter(event)));
          keyInput.setType(gcn::KeyInput::RELEASED);
          keyInput.setShiftPressed(event.key.keysym.mod & KMOD_SHIFT);
          keyInput.setControlPressed(event.key.keysym.mod & KMOD_CTRL);
          keyInput.setAltPressed(event.key.keysym.mod & KMOD_ALT);
          keyInput.setMetaPressed(event.key.keysym.mod & KMOD_GUI);
          keyInput.setNumericPad(event.key.keysym.sym >= SDLK_KP_0
                                 && event.key.keysym.sym <= SDLK_KP_EQUALS);

          mKeyInputQueue.push(keyInput);
          break;

      case SDL_MOUSEBUTTONDOWN:
          mMouseDown = true;
          setMouseCoordinates(mouseInput, event.button.x, event.button.y);
          mouseInput.setButton(convertMouseButton(event.button.button));
          mouseInput.setType(gcn::MouseInput::PRESSED);
          mouseInput.setTimeStamp(SDL_GetTicks());
          mMouseInputQueue.push(mouseInput);
          break;

      case SDL_MOUSEBUTTONUP:
          mMouseDown = false;
          setMouseCoordinates(mouseInput, event.button.x, event.button.y);
          mouseInput.setButton(convertMouseButton(event.button.button));
          mouseInput.setType(gcn::MouseInput::RELEASED);
          mouseInput.setTimeStamp(SDL_GetTicks());
          mMouseInputQueue.push(mouseInput);
          break;

      case SDL_MOUSEMOTION:
          setMouseCoordinates(mouseInput, event.button.x, event.button.y);
          mouseInput.setButton(gcn::MouseInput::EMPTY);
          mouseInput.setType(gcn::MouseInput::MOVED);
          mouseInput.setTimeStamp(SDL_GetTicks());
          mMouseInputQueue.push(mouseInput);
          break;

      case SDL_MOUSEWHEEL:
          if (event.wheel.y) {
#if SDL_VERSION_ATLEAST(2, 26, 0)
              setMouseCoordinates(mouseInput, event.wheel.mouseX, event.wheel.mouseY);
#else
              int x, y;
              SDL_GetMouseState(&x, &y);
              setMouseCoordinates(mouseInput, x, y);
#endif
              mouseInput.setButton(gcn::MouseInput::EMPTY);
              mouseInput.setType(event.wheel.y > 0 ? gcn::MouseInput::WHEEL_MOVED_UP
                                                   : gcn::MouseInput::WHEEL_MOVED_DOWN);
              mouseInput.setTimeStamp(SDL_GetTicks());
              mMouseInputQueue.push(mouseInput);
          }
          break;

      case SDL_TEXTINPUT:
          mTextInputQueue.emplace(event.text.text);
          break;

          // TODO_SDL2: This is now a window event
    // case SDL_WINDOWEVENT:
    //     switch (event.window.event) {
    //     }
    //     break;
#if 0
      case SDL_ACTIVEEVENT:
          /*
           * This occurs when the mouse leaves the window and the Gui-chan
           * application loses its mousefocus.
           */
          if ((event.active.state & SDL_APPMOUSEFOCUS)
              && !event.active.gain)
          {
              if (!mMouseDown)
              {
                  mouseInput.setX(-1);
                  mouseInput.setY(-1);
                  mouseInput.setButton(gcn::MouseInput::EMPTY);
                  mouseInput.setType(gcn::MouseInput::MOVED);
                  mMouseInputQueue.push(mouseInput);
              }
          }
          break;
#endif
    } // end switch
}

int SDLInput::convertMouseButton(int button)
{
    switch (button)
    {
      case SDL_BUTTON_LEFT:
          return gcn::MouseInput::LEFT;
      case SDL_BUTTON_RIGHT:
          return gcn::MouseInput::RIGHT;
      case SDL_BUTTON_MIDDLE:
          return gcn::MouseInput::MIDDLE;
      default:
          // We have an unknown mouse type which is ignored.
          return button;
    }
}

int SDLInput::convertKeyCharacter(SDL_Event event)
{
    SDL_Keysym keysym = event.key.keysym;

    int value = keysym.sym;

    switch (keysym.sym)
    {
      case SDLK_TAB:
          value = Key::TAB;
          break;
      case SDLK_LALT:
          value = Key::LEFT_ALT;
          break;
      case SDLK_RALT:
          value = Key::RIGHT_ALT;
          break;
      case SDLK_LSHIFT:
          value = Key::LEFT_SHIFT;
          break;
      case SDLK_RSHIFT:
          value = Key::RIGHT_SHIFT;
          break;
      case SDLK_LCTRL:
          value = Key::LEFT_CONTROL;
          break;
      case SDLK_RCTRL:
          value = Key::RIGHT_CONTROL;
          break;
      case SDLK_BACKSPACE:
          value = Key::BACKSPACE;
          break;
      case SDLK_PAUSE:
          value = Key::PAUSE;
          break;
      case SDLK_SPACE:
          value = Key::SPACE;
          break;
      case SDLK_ESCAPE:
      case SDLK_AC_BACK:
          value = Key::ESCAPE;
          break;
      case SDLK_DELETE:
          value = Key::DELETE_KEY;
          break;
      case SDLK_INSERT:
          value = Key::INSERT;
          break;
      case SDLK_HOME:
          value = Key::HOME;
          break;
      case SDLK_END:
          value = Key::END;
          break;
      case SDLK_PAGEUP:
          value = Key::PAGE_UP;
          break;
      case SDLK_PRINTSCREEN:
          value = Key::PRINT_SCREEN;
          break;
      case SDLK_PAGEDOWN:
          value = Key::PAGE_DOWN;
          break;
      case SDLK_F1:
          value = Key::F1;
          break;
      case SDLK_F2:
          value = Key::F2;
          break;
      case SDLK_F3:
          value = Key::F3;
          break;
      case SDLK_F4:
          value = Key::F4;
          break;
      case SDLK_F5:
          value = Key::F5;
          break;
      case SDLK_F6:
          value = Key::F6;
          break;
      case SDLK_F7:
          value = Key::F7;
          break;
      case SDLK_F8:
          value = Key::F8;
          break;
      case SDLK_F9:
          value = Key::F9;
          break;
      case SDLK_F10:
          value = Key::F10;
          break;
      case SDLK_F11:
          value = Key::F11;
          break;
      case SDLK_F12:
          value = Key::F12;
          break;
      case SDLK_F13:
          value = Key::F13;
          break;
      case SDLK_F14:
          value = Key::F14;
          break;
      case SDLK_F15:
          value = Key::F15;
          break;
      case SDLK_NUMLOCKCLEAR:
          value = Key::NUM_LOCK;
          break;
      case SDLK_CAPSLOCK:
          value = Key::CAPS_LOCK;
          break;
      case SDLK_SCROLLLOCK:
          value = Key::SCROLL_LOCK;
          break;
      case SDLK_RGUI:
          value = Key::RIGHT_META;
          break;
      case SDLK_LGUI:
          value = Key::LEFT_META;
          break;
      case SDLK_MODE:
          value = Key::ALT_GR;
          break;
      case SDLK_UP:
          value = Key::UP;
          break;
      case SDLK_DOWN:
          value = Key::DOWN;
          break;
      case SDLK_LEFT:
          value = Key::LEFT;
          break;
      case SDLK_RIGHT:
          value = Key::RIGHT;
          break;
      case SDLK_RETURN:
          value = Key::ENTER;
          break;
      case SDLK_KP_ENTER:
          value = Key::ENTER;
          break;

      default:
          break;
    }

    if (!(keysym.mod & KMOD_NUM))
    {
        switch (keysym.sym)
        {
          case SDLK_KP_0:
              value = Key::INSERT;
              break;
          case SDLK_KP_1:
              value = Key::END;
              break;
          case SDLK_KP_2:
              value = Key::DOWN;
              break;
          case SDLK_KP_3:
              value = Key::PAGE_DOWN;
              break;
          case SDLK_KP_4:
              value = Key::LEFT;
              break;
          case SDLK_KP_5:
              value = 0;
              break;
          case SDLK_KP_6:
              value = Key::RIGHT;
              break;
          case SDLK_KP_7:
              value = Key::HOME;
              break;
          case SDLK_KP_8:
              value = Key::UP;
              break;
          case SDLK_KP_9:
              value = Key::PAGE_UP;
              break;
          default:
              break;
        }
    }

    return value;
}