/*****************************************************************************
 * win32_loop.cpp
 *****************************************************************************
 * Copyright (C) 2003 the VideoLAN team
 *
 * Authors: Cyril Deguet     <asmax@via.ecp.fr>
 *          Olivier Teulière <ipkiss@via.ecp.fr>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
 *****************************************************************************/

#ifdef WIN32_SKINS

#include "win32_factory.hpp"
#include "win32_loop.hpp"
#include "../src/generic_window.hpp"
#include "../events/evt_key.hpp"
#include "../events/evt_leave.hpp"
#include "../events/evt_menu.hpp"
#include "../events/evt_motion.hpp"
#include "../events/evt_mouse.hpp"
#include "../events/evt_refresh.hpp"
#include "../events/evt_scroll.hpp"
#include <vlc_actions.h>


// XXX: Cygwin (at least) doesn't define these macros. Too bad...
#ifndef GET_X_LPARAM
    #define GET_X_LPARAM(a) ((int16_t)(a))
    #define GET_Y_LPARAM(a) ((int16_t)((a)>>16))
#endif


Win32Loop::Win32Loop( intf_thread_t *pIntf ): OSLoop( pIntf )
{
    // Initialize the map
    virtKeyToVlcKey[VK_F1] = KEY_F1;
    virtKeyToVlcKey[VK_F2] = KEY_F2;
    virtKeyToVlcKey[VK_F3] = KEY_F3;
    virtKeyToVlcKey[VK_F4] = KEY_F4;
    virtKeyToVlcKey[VK_F5] = KEY_F5;
    virtKeyToVlcKey[VK_F6] = KEY_F6;
    virtKeyToVlcKey[VK_F7] = KEY_F7;
    virtKeyToVlcKey[VK_F8] = KEY_F8;
    virtKeyToVlcKey[VK_F9] = KEY_F9;
    virtKeyToVlcKey[VK_F10] = KEY_F10;
    virtKeyToVlcKey[VK_F11] = KEY_F11;
    virtKeyToVlcKey[VK_F12] = KEY_F12;
    virtKeyToVlcKey[VK_F13] = KEY_F(13);
    virtKeyToVlcKey[VK_F14] = KEY_F(14);
    virtKeyToVlcKey[VK_F15] = KEY_F(15);
    virtKeyToVlcKey[VK_F16] = KEY_F(16);
    virtKeyToVlcKey[VK_F17] = KEY_F(17);
    virtKeyToVlcKey[VK_F18] = KEY_F(18);
    virtKeyToVlcKey[VK_F19] = KEY_F(19);
    virtKeyToVlcKey[VK_F20] = KEY_F(20);
    virtKeyToVlcKey[VK_F21] = KEY_F(21);
    virtKeyToVlcKey[VK_F22] = KEY_F(22);
    virtKeyToVlcKey[VK_F23] = KEY_F(23);
    virtKeyToVlcKey[VK_F24] = KEY_F(24);
    virtKeyToVlcKey[VK_RETURN] = KEY_ENTER;
    virtKeyToVlcKey[VK_SPACE] = ' ';
    virtKeyToVlcKey[VK_ESCAPE] = KEY_ESC;
    virtKeyToVlcKey[VK_LEFT] = KEY_LEFT;
    virtKeyToVlcKey[VK_RIGHT] = KEY_RIGHT;
    virtKeyToVlcKey[VK_UP] = KEY_UP;
    virtKeyToVlcKey[VK_DOWN] = KEY_DOWN;
    virtKeyToVlcKey[VK_INSERT] = KEY_INSERT;
    virtKeyToVlcKey[VK_DELETE] = KEY_DELETE;
    virtKeyToVlcKey[VK_HOME] = KEY_HOME;
    virtKeyToVlcKey[VK_END] = KEY_END;
    virtKeyToVlcKey[VK_PRIOR] = KEY_PAGEUP;
    virtKeyToVlcKey[VK_NEXT] = KEY_PAGEDOWN;
    virtKeyToVlcKey[VK_BROWSER_BACK] = KEY_BROWSER_BACK;
    virtKeyToVlcKey[VK_BROWSER_FORWARD] = KEY_BROWSER_FORWARD;
    virtKeyToVlcKey[VK_BROWSER_REFRESH] = KEY_BROWSER_REFRESH;
    virtKeyToVlcKey[VK_BROWSER_STOP] = KEY_BROWSER_STOP;
    virtKeyToVlcKey[VK_BROWSER_SEARCH] = KEY_BROWSER_SEARCH;
    virtKeyToVlcKey[VK_BROWSER_FAVORITES] = KEY_BROWSER_FAVORITES;
    virtKeyToVlcKey[VK_BROWSER_HOME] = KEY_BROWSER_HOME;
    virtKeyToVlcKey[VK_VOLUME_MUTE] = KEY_VOLUME_MUTE;
    virtKeyToVlcKey[VK_VOLUME_DOWN] = KEY_VOLUME_DOWN;
    virtKeyToVlcKey[VK_VOLUME_UP] = KEY_VOLUME_UP;
    virtKeyToVlcKey[VK_MEDIA_NEXT_TRACK] = KEY_MEDIA_NEXT_TRACK;
    virtKeyToVlcKey[VK_MEDIA_PREV_TRACK] = KEY_MEDIA_PREV_TRACK;
    virtKeyToVlcKey[VK_MEDIA_STOP] = KEY_MEDIA_STOP;
    virtKeyToVlcKey[VK_MEDIA_PLAY_PAUSE] = KEY_MEDIA_PLAY_PAUSE;
}

OSLoop *Win32Loop::instance( intf_thread_t *pIntf )
{

    if( pIntf->p_sys->p_osLoop == NULL )
        pIntf->p_sys->p_osLoop = std::make_unique<Win32Loop>(pIntf);
    return pIntf->p_sys->p_osLoop.get();
}


void Win32Loop::destroy( intf_thread_t *pIntf )
{
    assert(pIntf->p_sys->p_osLoop);
    pIntf->p_sys->p_osLoop.reset();
}


void Win32Loop::run()
{
    MSG msg;

    // Compute windows message list
    while( GetMessage( &msg, NULL, 0, 0 ) )
    {
        TranslateMessage( &msg );
        DispatchMessage( &msg );
    }
}


LRESULT CALLBACK Win32Loop::processEvent( HWND hwnd, UINT msg,
                                          WPARAM wParam, LPARAM lParam )
{
    Win32Factory *pFactory =
        (Win32Factory*)Win32Factory::instance( getIntf() );
    GenericWindow *pWin = pFactory->m_windowMap[hwnd];

    GenericWindow &win = *pWin;
    switch( msg )
    {
        case WM_PAINT:
        {
            PAINTSTRUCT Infos;
            BeginPaint( hwnd, &Infos );
            EvtRefresh evt( getIntf(),
                            Infos.rcPaint.left,
                            Infos.rcPaint.top,
                            Infos.rcPaint.right - Infos.rcPaint.left + 1,
                            Infos.rcPaint.bottom - Infos.rcPaint.top + 1 );
            win.processEvent( evt );
            EndPaint( hwnd, &Infos );
            return 0;
        }
        case WM_COMMAND:
        {
            EvtMenu evt( getIntf(), LOWORD( wParam ) );
            win.processEvent( evt );
            return 0;
        }
        case WM_MOUSEMOVE:
        {
            // Needed to generate WM_MOUSELEAVE events
            TRACKMOUSEEVENT TrackEvent;
            TrackEvent.cbSize      = sizeof( TRACKMOUSEEVENT );
            TrackEvent.dwFlags     = TME_LEAVE;
            TrackEvent.hwndTrack   = hwnd;
            TrackEvent.dwHoverTime = 1;
            TrackMouseEvent( &TrackEvent );

            // Compute the absolute position of the mouse
            int x = GET_X_LPARAM( lParam ) + win.getLeft();
            int y = GET_Y_LPARAM( lParam ) + win.getTop();
            EvtMotion evt( getIntf(), x, y );
            win.processEvent( evt );
            return 0;
        }
        case WM_MOUSELEAVE:
        {
            EvtLeave evt( getIntf() );
            win.processEvent( evt );
            return 0;
        }
        case WM_MOUSEWHEEL:
        {
            int x = GET_X_LPARAM( lParam ) - win.getLeft();
            int y = GET_Y_LPARAM( lParam ) - win.getTop();
            int mod = getMod( wParam );
            if( GET_WHEEL_DELTA_WPARAM( wParam ) > 0 )
            {
                EvtScroll evt( getIntf(), x, y, EvtScroll::kUp, mod );
                win.processEvent( evt );
            }
            else
            {
                EvtScroll evt( getIntf(), x, y, EvtScroll::kDown, mod );
                win.processEvent( evt );
            }
            return 0;
        }
        case WM_LBUTTONDOWN:
        {
            SetCapture( hwnd );
            EvtMouse evt( getIntf(), GET_X_LPARAM( lParam ),
                          GET_Y_LPARAM( lParam ), EvtMouse::kLeft,
                          EvtMouse::kDown, getMod( wParam ) );
            win.processEvent( evt );
            return 0;
        }
        case WM_RBUTTONDOWN:
        {
            SetCapture( hwnd );
            EvtMouse evt( getIntf(), GET_X_LPARAM( lParam ),
                          GET_Y_LPARAM( lParam ), EvtMouse::kRight,
                          EvtMouse::kDown, getMod( wParam ) );
            win.processEvent( evt );
            return 0;
        }
        case WM_LBUTTONUP:
        {
            ReleaseCapture();
            EvtMouse evt( getIntf(), GET_X_LPARAM( lParam ),
                          GET_Y_LPARAM( lParam ), EvtMouse::kLeft,
                          EvtMouse::kUp, getMod( wParam ) );
            win.processEvent( evt );
            return 0;
        }
        case WM_RBUTTONUP:
        {
            ReleaseCapture();
            EvtMouse evt( getIntf(), GET_X_LPARAM( lParam ),
                          GET_Y_LPARAM( lParam ), EvtMouse::kRight,
                          EvtMouse::kUp, getMod( wParam ) );
            win.processEvent( evt );
            return 0;
        }
        case WM_LBUTTONDBLCLK:
        {
            ReleaseCapture();
            EvtMouse evt( getIntf(), GET_X_LPARAM( lParam ),
                          GET_Y_LPARAM( lParam ), EvtMouse::kLeft,
                          EvtMouse::kDblClick, getMod( wParam ) );
            win.processEvent( evt );
            return 0;
        }
        case WM_RBUTTONDBLCLK:
        {
            ReleaseCapture();
            EvtMouse evt( getIntf(), GET_X_LPARAM( lParam ),
                          GET_Y_LPARAM( lParam ), EvtMouse::kRight,
                          EvtMouse::kDblClick, getMod( wParam ) );
            win.processEvent( evt );
            return 0;
        }
        case WM_KEYDOWN:
        case WM_SYSKEYDOWN:
        case WM_KEYUP:
        case WM_SYSKEYUP:
        {
            // The key events are first processed here and not translated
            // into WM_CHAR events because we need to know the status of
            // the modifier keys.

            // Get VLC key code from the virtual key code
            int key = virtKeyToVlcKey[wParam];
            if( !key )
            {
                // This appears to be a "normal" (ascii) key
                key = tolower( (unsigned char)MapVirtualKey( wParam, 2 ) );
            }

            if( key )
            {
                // Get the modifier
                int mod = 0;
                if( GetKeyState( VK_CONTROL ) & 0x8000 )
                {
                    mod |= EvtInput::kModCtrl;
                }
                if( GetKeyState( VK_SHIFT ) & 0x8000 )
                {
                    mod |= EvtInput::kModShift;
                }
                if( GetKeyState( VK_MENU ) & 0x8000 )
                {
                    mod |= EvtInput::kModAlt;
                }

                // Get the state
                EvtKey::ActionType_t state;
                if( msg == WM_KEYDOWN ||
                    msg == WM_SYSKEYDOWN )
                {
                    state = EvtKey::kDown;
                }
                else
                {
                    state = EvtKey::kUp;
                }

                EvtKey evt( getIntf(), key, state, mod );
                win.processEvent( evt );
            }
            return 0;
        }
        default:
            break;
    }
    return DefWindowProc( hwnd, msg, wParam, lParam );
}


int Win32Loop::getMod( WPARAM wParam ) const
{
    int mod = EvtInput::kModNone;
    if( wParam & MK_CONTROL )
        mod |= EvtInput::kModCtrl;
    if( wParam & MK_SHIFT )
        mod |= EvtInput::kModShift;

    return mod;
}


void Win32Loop::exit()
{
    PostQuitMessage(0);
}

#endif