/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library 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
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the Free
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    Sam Lantinga
    slouken@libsdl.org
*/

#ifdef SAVE_RCSID
static char rcsid =
 "@(#) $Id$";
#endif

/* Handle the event stream, converting photon events into SDL events */

#define DISABLE_X11

#include <Ph.h>
#include <stdio.h>
#include <setjmp.h>
#include <photon/PkKeyDef.h>
#include <sys/time.h>

#include "SDL.h"
#include "SDL_syswm.h"
#include "SDL_sysevents.h"
#include "SDL_sysvideo.h"
#include "SDL_events_c.h"
#include "SDL_ph_video.h"
#include "SDL_ph_modes_c.h"
#include "SDL_ph_image_c.h"
#include "SDL_ph_events_c.h"


/* The translation tables from a photon keysym to a SDL keysym */
static SDLKey ODD_keymap[256];
static SDLKey MISC_keymap[0xFF + 1];
SDL_keysym *ph_TranslateKey(PhKeyEvent_t *key, SDL_keysym *keysym);

/* Check to see if this is a repeated key.
   (idea shamelessly lifted from GII -- thanks guys! :)
 */

static int ph_WarpedMotion(_THIS, PhEvent_t *winEvent)
{
    PhRect_t *rect = PhGetRects( winEvent );

    int centre_x, centre_y;
    int dx, dy;
    short abs_x, abs_y;
    int posted;

    centre_x = SDL_VideoSurface->w / 2;
    centre_y = SDL_VideoSurface->h / 2;

    dx = rect->ul.x - centre_x;
    dy = rect->ul.y - centre_y;

    posted = SDL_PrivateMouseMotion( 0, 1, dx, dy );

    /* Move mouse cursor to middle of the window */
    PtGetAbsPosition( window, &abs_x, &abs_y );
    PhMoveCursorAbs(PhInputGroup(NULL), abs_x + centre_x, abs_y + centre_y);

    return (posted);
}

/* Control which motion flags the window has set, a flags value of -1 sets
 * MOTION_BUTTON and MOTION_NOBUTTON */

static void set_motion_sensitivity(_THIS, unsigned int flags)
{
    int rid;
    int fields = Ph_EV_PTR_MOTION_BUTTON | Ph_EV_PTR_MOTION_NOBUTTON;
    PhRegion_t region;

    if( window )
    {
        rid = PtWidgetRid( window );
        if( rid != 0 && PhRegionQuery( rid, &region, NULL, NULL, 0 ) == 0 )
        {
            region.events_sense=(region.events_sense & ~fields)|(flags & fields);
            PhRegionChange(Ph_REGION_EV_SENSE, 0, &region, NULL, NULL);
        }
    }
}

/* Convert the photon button state value to an SDL value */
static Uint8 ph2sdl_mousebutton(unsigned short button_state)
{
    Uint8 mouse_button = 0;

    if (button_state & Ph_BUTTON_SELECT)
        mouse_button |= SDL_BUTTON_LEFT;
    if (button_state & Ph_BUTTON_MENU)
        mouse_button |= SDL_BUTTON_RIGHT;
    if (button_state & Ph_BUTTON_ADJUST)
        mouse_button |= SDL_BUTTON_MIDDLE;

    return (mouse_button);
}

static int ph_DispatchEvent(_THIS)
{
    int posted;
    PhRect_t* rect;
    PhPointerEvent_t* pointerEvent;
    PhKeyEvent_t* keyEvent;
    PhWindowEvent_t* winEvent;
    int i, buttons;
    SDL_Rect sdlrects[50]; 
	
    posted = 0;
	
    switch (event->type)
    {
        case Ph_EV_BOUNDARY:
        {
            if (event->subtype == Ph_EV_PTR_ENTER)
            {
                posted = SDL_PrivateAppActive(1, SDL_APPMOUSEFOCUS);
            }
            else if (event->subtype ==Ph_EV_PTR_LEAVE)
            {
                posted = SDL_PrivateAppActive(0, SDL_APPMOUSEFOCUS);	
            }
        }
        break;

        case Ph_EV_PTR_MOTION_BUTTON:
        case Ph_EV_PTR_MOTION_NOBUTTON:
        {
            if (SDL_VideoSurface)
            {
                pointerEvent = PhGetData(event);
                rect = PhGetRects(event);

                if (mouse_relative)
                {
                    posted = ph_WarpedMotion(this, event);
                }
                else
                {
                    posted = SDL_PrivateMouseMotion(0, 0, rect->ul.x, rect->ul.y);
                }
            }
        }
        break;

        case Ph_EV_BUT_PRESS:
        {
            pointerEvent = PhGetData( event );
            buttons = ph2sdl_mousebutton( pointerEvent->buttons );
            if (buttons != 0)
            {
                posted = SDL_PrivateMouseButton(SDL_PRESSED, buttons, 0, 0);
            }
        }
        break;

        case Ph_EV_BUT_RELEASE:
        {
            pointerEvent = PhGetData(event);
            buttons = ph2sdl_mousebutton(pointerEvent->buttons);
            if (event->subtype == Ph_EV_RELEASE_REAL && buttons != 0)
            {
                posted = SDL_PrivateMouseButton(SDL_RELEASED, buttons, 0, 0);
            }
            else if(event->subtype == Ph_EV_RELEASE_PHANTOM)
            {
                /* If the mouse is outside the window,
                 * only a phantom release event is sent, so
                 * check if the window doesn't have mouse focus.
                 * Not perfect, maybe checking the mouse button
                 * state for Ph_EV_BOUNDARY events would be
                 * better. */
                if ((SDL_GetAppState() & SDL_APPMOUSEFOCUS) == 0)
		{
                    posted = SDL_PrivateMouseButton(SDL_RELEASED, buttons, 0, 0);
                }
            }
        }
        break;

        case Ph_EV_WM:
        {
            winEvent = PhGetData(event);

            /* losing focus */
            if ((winEvent->event_f==Ph_WM_FOCUS) && (winEvent->event_state==Ph_WM_EVSTATE_FOCUSLOST))
            {
                set_motion_sensitivity(this, Ph_EV_PTR_MOTION_BUTTON);
                posted = SDL_PrivateAppActive(0, SDL_APPINPUTFOCUS);	
            }
            /* gaining focus */
            else if ((winEvent->event_f==Ph_WM_FOCUS) && (winEvent->event_state==Ph_WM_EVSTATE_FOCUS))
            {
                set_motion_sensitivity(this, -1);
                posted = SDL_PrivateAppActive(1, SDL_APPINPUTFOCUS);
            }
            /* request to quit */
            else if (winEvent->event_f==Ph_WM_CLOSE)
            {
                posted = SDL_PrivateQuit();
            }
            /* request to resize */
            else if (winEvent->event_f==Ph_WM_RESIZE)
            {
                SDL_PrivateResize(winEvent->size.w, winEvent->size.h);
            }
            /* request to maximize */
            else if (winEvent->event_f==Ph_WM_MAX)
            {
                /* TODO: get screen resolution, set window pos to 0, 0 and resize it ! */
            }
        }
        break;

        /* window has been resized, moved or removed */
        case Ph_EV_EXPOSE:
        {
            if (SDL_VideoSurface)
            {
                rect = PhGetRects(event);

                for(i=0;i<event->num_rects;i++)
                {
                    sdlrects[i].x = rect[i].ul.x;
                    sdlrects[i].y = rect[i].ul.y;
                    sdlrects[i].w = rect[i].lr.x - rect[i].ul.x + 1;
                    sdlrects[i].h = rect[i].lr.y - rect[i].ul.y + 1;
                }

                this->UpdateRects(this, event->num_rects, sdlrects);
            }
        }
	break;

        case Ph_EV_KEY:
        {
            SDL_keysym keysym;

            posted = 0;

            keyEvent = PhGetData( event );

            if (Pk_KF_Key_Down & keyEvent->key_flags)
            {
                posted = SDL_PrivateKeyboard(SDL_PRESSED, ph_TranslateKey(keyEvent, &keysym));
            }
            else /* must be key release */
            {
                 /* Ignore repeated key release events */
                 /* if (! Pk_KF_Key_Repeat & keyEvent->key_flags ) */

                posted = SDL_PrivateKeyboard(SDL_RELEASED, ph_TranslateKey( keyEvent, &keysym));
            }
        }
        break;
    }

    return(posted);
}

/* perform a blocking read if no events available */
int ph_Pending(_THIS)
{
    /* Flush the display connection and look to see if events are queued */
    PgFlush();

    while( 1 )
    {   /* note this is a non-blocking call */
        switch( PhEventPeek( event, EVENT_SIZE ) )
        {
            case Ph_EVENT_MSG:
                 return 1;
                 break;
            case -1:
                 perror("ph_Pending(): PhEventNext failed");
                 break;
            default:
                 return 0;
        }
    }

    /* Oh well, nothing is ready .. */
    return(0);
}

void ph_PumpEvents(_THIS)
{
    /* Flush the display connection and look to see if events are queued */
    PgFlush();

    while (ph_Pending(this))
    {
        ph_DispatchEvent(this);
    }
}

void ph_InitKeymap(void)
{
    int i;

    /* Odd keys used in international keyboards */
    for (i=0; i<SDL_TABLESIZE(ODD_keymap); ++i)
        ODD_keymap[i] = SDLK_UNKNOWN;

    /* Map the miscellaneous keys */
    for (i=0; i<SDL_TABLESIZE(MISC_keymap); ++i)
        MISC_keymap[i] = SDLK_UNKNOWN;

    MISC_keymap[Pk_BackSpace&0xFF] = SDLK_BACKSPACE;
    MISC_keymap[Pk_Tab&0xFF] = SDLK_TAB;
    MISC_keymap[Pk_Clear&0xFF] = SDLK_CLEAR;
    MISC_keymap[Pk_Return&0xFF] = SDLK_RETURN;
    MISC_keymap[Pk_Pause&0xFF] = SDLK_PAUSE;
    MISC_keymap[Pk_Escape&0xFF] = SDLK_ESCAPE;
    MISC_keymap[Pk_Delete&0xFF] = SDLK_DELETE;

    MISC_keymap[Pk_KP_0&0xFF] = SDLK_KP0;
    MISC_keymap[Pk_KP_1&0xFF] = SDLK_KP1;
    MISC_keymap[Pk_KP_2&0xFF] = SDLK_KP2;
    MISC_keymap[Pk_KP_3&0xFF] = SDLK_KP3;
    MISC_keymap[Pk_KP_4&0xFF] = SDLK_KP4;
    MISC_keymap[Pk_KP_5&0xFF] = SDLK_KP5;
    MISC_keymap[Pk_KP_6&0xFF] = SDLK_KP6;
    MISC_keymap[Pk_KP_7&0xFF] = SDLK_KP7;
    MISC_keymap[Pk_KP_8&0xFF] = SDLK_KP8;
    MISC_keymap[Pk_KP_9&0xFF] = SDLK_KP9;

    MISC_keymap[Pk_KP_Decimal&0xFF] = SDLK_KP_PERIOD;
    MISC_keymap[Pk_KP_Divide&0xFF] = SDLK_KP_DIVIDE;
    MISC_keymap[Pk_KP_Multiply&0xFF] = SDLK_KP_MULTIPLY;
    MISC_keymap[Pk_KP_Subtract&0xFF] = SDLK_KP_MINUS;
    MISC_keymap[Pk_KP_Add&0xFF] = SDLK_KP_PLUS;
    MISC_keymap[Pk_KP_Enter&0xFF] = SDLK_KP_ENTER;
    MISC_keymap[Pk_KP_Equal&0xFF] = SDLK_KP_EQUALS;

    MISC_keymap[Pk_Up&0xFF] = SDLK_UP;
    MISC_keymap[Pk_Down&0xFF] = SDLK_DOWN;
    MISC_keymap[Pk_Right&0xFF] = SDLK_RIGHT;
    MISC_keymap[Pk_Left&0xFF] = SDLK_LEFT;
    MISC_keymap[Pk_Insert&0xFF] = SDLK_INSERT;
    MISC_keymap[Pk_Home&0xFF] = SDLK_HOME;
    MISC_keymap[Pk_End&0xFF] = SDLK_END;
    MISC_keymap[Pk_Pg_Up&0xFF] = SDLK_PAGEUP;
    MISC_keymap[Pk_Pg_Down&0xFF] = SDLK_PAGEDOWN;

    MISC_keymap[Pk_F1&0xFF] = SDLK_F1;
    MISC_keymap[Pk_F2&0xFF] = SDLK_F2;
    MISC_keymap[Pk_F3&0xFF] = SDLK_F3;
    MISC_keymap[Pk_F4&0xFF] = SDLK_F4;
    MISC_keymap[Pk_F5&0xFF] = SDLK_F5;
    MISC_keymap[Pk_F6&0xFF] = SDLK_F6;
    MISC_keymap[Pk_F7&0xFF] = SDLK_F7;
    MISC_keymap[Pk_F8&0xFF] = SDLK_F8;
    MISC_keymap[Pk_F9&0xFF] = SDLK_F9;
    MISC_keymap[Pk_F10&0xFF] = SDLK_F10;
    MISC_keymap[Pk_F11&0xFF] = SDLK_F11;
    MISC_keymap[Pk_F12&0xFF] = SDLK_F12;
    MISC_keymap[Pk_F13&0xFF] = SDLK_F13;
    MISC_keymap[Pk_F14&0xFF] = SDLK_F14;
    MISC_keymap[Pk_F15&0xFF] = SDLK_F15;

    MISC_keymap[Pk_Num_Lock&0xFF] = SDLK_NUMLOCK;
    MISC_keymap[Pk_Caps_Lock&0xFF] = SDLK_CAPSLOCK;
    MISC_keymap[Pk_Scroll_Lock&0xFF] = SDLK_SCROLLOCK;
    MISC_keymap[Pk_Shift_R&0xFF] = SDLK_RSHIFT;
    MISC_keymap[Pk_Shift_L&0xFF] = SDLK_LSHIFT;
    MISC_keymap[Pk_Control_R&0xFF] = SDLK_RCTRL;
    MISC_keymap[Pk_Control_L&0xFF] = SDLK_LCTRL;
    MISC_keymap[Pk_Alt_R&0xFF] = SDLK_RALT;
    MISC_keymap[Pk_Alt_L&0xFF] = SDLK_LALT;
    MISC_keymap[Pk_Meta_R&0xFF] = SDLK_RMETA;
    MISC_keymap[Pk_Meta_L&0xFF] = SDLK_LMETA;
    MISC_keymap[Pk_Super_L&0xFF] = SDLK_LSUPER;   /* Left "Windows"  */
    MISC_keymap[Pk_Super_R&0xFF] = SDLK_RSUPER;   /* Right "Windows" */
    MISC_keymap[Pk_Mode_switch&0xFF] = SDLK_MODE; /* "Alt Gr" key    */

    MISC_keymap[Pk_Help&0xFF] = SDLK_HELP;
    MISC_keymap[Pk_Print&0xFF] = SDLK_PRINT;
    MISC_keymap[Pk_Break&0xFF] = SDLK_BREAK;
    MISC_keymap[Pk_Menu&0xFF] = SDLK_MENU;
    MISC_keymap[Pk_Hyper_R&0xFF] = SDLK_MENU;   /* Windows "Menu" key */
}

static unsigned long cap;

SDL_keysym *ph_TranslateKey(PhKeyEvent_t *key, SDL_keysym *keysym)
{
    /* 'sym' is set to the value of the key with modifiers applied to it.
       This member is valid only if Pk_KF_Sym_Valid is set in the key_flags.
       We will assume it is valid. */

    /* FIXME: This needs to check whether the cap & scancode is valid */

    cap = key->key_cap;

    switch (cap>>8)
    {
        case 0x00:  /* Latin 1 */
        case 0x01:  /* Latin 2 */
        case 0x02:  /* Latin 3 */
        case 0x03:  /* Latin 4 */
        case 0x04:  /* Katakana */
        case 0x05:  /* Arabic */
        case 0x06:  /* Cyrillic */
        case 0x07:  /* Greek */
        case 0x08:  /* Technical */
        case 0x0A:  /* Publishing */
        case 0x0C:  /* Hebrew */
        case 0x0D:  /* Thai */
                   keysym->sym = (SDLKey)(cap&0xFF);
                   /* Map capital letter syms to lowercase */
                   if ((keysym->sym >= 'A')&&(keysym->sym <= 'Z'))
                       keysym->sym += ('a'-'A');
                   break;
        case 0xF0:
                   keysym->sym = MISC_keymap[cap&0xFF];
                   break;
        default:
                   keysym->sym = SDLK_UNKNOWN;                
                   break;
    }

    keysym->scancode = key->key_scan;
    keysym->unicode = 0;

    if (SDL_TranslateUNICODE)
    {
        char utf8[MB_CUR_MAX];
        int utf8len;
        wchar_t unicode;

        utf8len = PhKeyToMb(utf8, key);
        if (utf8len > 0)
        {
            utf8len = mbtowc(&unicode, utf8, utf8len);
            if (utf8len > 0)
                keysym->unicode = unicode;
        }
    }

    return (keysym);
}

void ph_InitOSKeymap(_THIS)
{
    ph_InitKeymap();
}