/*  RetroArch - A frontend for libretro.
 *  Copyright (C) 2010-2014 - Hans-Kristian Arntzen
 *  Copyright (C) 2011-2017 - Daniel De Matteis
 *  Copyright (C) 2016-2017 - Brad Parker
 *
 *  RetroArch 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 Found-
 *  ation, either version 3 of the License, or (at your option) any later version.
 *
 *  RetroArch 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 RetroArch.
 *  If not, see <http://www.gnu.org/licenses/>.
 */

#include "../video_display_server.h"
#include "../common/x11_common.h"
#include "../../configuration.h"
#include "../video_driver.h" /* needed to set refresh rate in set resolution */
#include "../video_crt_switch.h" /* needed to set aspect for low res in linux */

#include <sys/types.h>
#include <unistd.h>

static char old_mode[150];
static char new_mode[150];
static bool crt_en     = false;

typedef struct
{
   unsigned opacity;
   bool decorations;
} dispserv_x11_t;

static void* x11_display_server_init(void)
{
   dispserv_x11_t *dispserv = (dispserv_x11_t*)calloc(1, sizeof(*dispserv));

   if (!dispserv)
      return NULL;

   return dispserv;
}

static void x11_display_server_destroy(void *data)
{
   dispserv_x11_t *dispserv = (dispserv_x11_t*)data;

   if (crt_en == true)
      system("xrandr -s 704x480");

   if (dispserv)
      free(dispserv);
}

static bool x11_set_window_opacity(void *data, unsigned opacity)
{
   dispserv_x11_t *serv = (dispserv_x11_t*)data;
   Atom net_wm_opacity  = XInternAtom(g_x11_dpy, "_NET_WM_WINDOW_OPACITY", False);
   Atom cardinal        = XInternAtom(g_x11_dpy, "CARDINAL", False);

   serv->opacity        = opacity;

   opacity              = opacity * ((unsigned)-1 / 100.0);

   if (opacity == (unsigned)-1)
      XDeleteProperty(g_x11_dpy, g_x11_win, net_wm_opacity);
  else
      XChangeProperty(g_x11_dpy, g_x11_win, net_wm_opacity, cardinal, 32, PropModeReplace, (const unsigned char*)&opacity, 1);

   return true;
}

static bool x11_set_window_decorations(void *data, bool on)
{
   dispserv_x11_t *serv = (dispserv_x11_t*)data;

   serv->decorations = on;

   /* menu_setting performs a reinit instead to properly apply decoration changes */

   return true;
}

static bool x11_set_resolution(void *data,
      unsigned width, unsigned height, int int_hz, float hz)
{
   int i              = 0;
   int hfp            = 0;
   int hsp            = 0;
   int hbp            = 0;
   int vfp            = 0;
   int vsp            = 0;
   int vbp            = 0;
   int hmax           = 0;
   int vmax           = 0;
   float pixel_clock  = 0;
   char xrandr[250];
   char fbset[150];
   char output[150];

   crt_en = true;

   hsp = width*1.14;
      
   /* set core refresh from hz */
   video_monitor_set_refresh_rate(hz);	  
   
   /* following code is the mode line genorator */
   if (width < 300)
   {
      width = width*2;
      crt_aspect_ratio_switch(width, height);
   }

   hfp = width+16;
   hbp = width*1.22;
   hmax = hbp;
   
   if (height < 241)
   { 
      vmax = 261;
   }
   if (height < 241 && hz > 56 && hz < 58)
   { 
      vmax = 280;
   }
    if (height < 241 && hz < 55)
   { 
      vmax = 313;
   }
   if (height > 250 && height < 260 && hz > 54)
   { 
      vmax = 296;
   }
   if (height > 250 && height < 260 && hz > 52 && hz < 54)
   { 
      vmax = 285;
   }
   if (height > 240 && height < 260 && hz < 52)
   { 
      vmax = 265;
   }
   if (height > 250 && height < 260 && hz < 52)
   { 
      vmax = 313;
   }
   if (height > 260 && height < 300)
   { 
      vmax = 313;
   }

   if (height > 400 && hz > 56)
   {
      vmax = 523;
   }
   if (height > 520 && hz < 57)
   {
      vmax = 580;
   }

   if (height > 300 && hz < 56)
   {
      vmax = 627;
   }
   
   if (hz < 53)
   {   
   vfp = height+((vmax-height)*0.38);
   }
   if (hz > 56)
   {   
   vfp = height+((vmax-height)*0.15);
   }
   if (hz > 53 && hz < 56)
   {   
   vfp = height+((vmax-height)*0.35);
   }

   
   if ( vfp < 1 )
   {
      vfp = height+2;
        
   }

   if (height < 300)
   {
     vsp = vfp+3; /* needs to me 3 for progressive */
   } if (height > 300)
   {
     vsp = vfp+6; /* needs to me 6 for interlaced */
   }
   
   vbp = vmax;

   if (height < 300)
   {
	   pixel_clock = (hmax*vmax*hz)/1000000;
   }
	
   if (height > 300)
   {
	   pixel_clock = ((hmax*vmax*hz)/1000000)/2;
   }
   /* above code is the modeline genorator */

   /* create progressive newmode from modline variables */
   if (height < 300)
   {
      sprintf(xrandr,"xrandr --newmode \"%dx%d_%0.2f\" %lf %d %d %d %d %d %d %d %d -hsync -vsync", width, height, hz, pixel_clock, width, hfp, hsp, hbp, height, vfp, vsp, vbp);
      system(xrandr);

   }
   /* create interlaced newmode from modline variables */
   if (height > 300)
   {    
      sprintf(xrandr,"xrandr --newmode \"%dx%d_%0.2f\" %lf %d %d %d %d %d %d %d %d interlace -hsync -vsync", width, height, hz, pixel_clock, width, hfp, hsp, hbp, height, vfp, vsp, vbp);
      system(xrandr);

   }
      /* variable for new mode */
      sprintf(new_mode,"%dx%d_%0.2f", width, height, hz); 

      /* need to run loops for DVI0 - DVI-2 and VGA0 - VGA-2 outputs to add and delete modes */
      for (i =0; i < 3; i++)
      {
         sprintf(output,"xrandr --addmode %s%d %s", "DVI",i ,new_mode);
         system(output); 
         sprintf(output,"xrandr --delmode %s%d %s", "DVI",i ,old_mode);
         system(output); 
      }
      for (i =0; i < 3; i++)
      {
         sprintf(output,"xrandr --addmode %s-%d %s", "DVI",i ,new_mode);
         system(output); 
         sprintf(output,"xrandr --delmode %s-%d %s", "DVI",i ,old_mode);
         system(output);
      }
      for (i =0; i < 3; i++)
      {
         sprintf(output,"xrandr --addmode %s%d %s", "VGA",i ,new_mode);
         system(output);  
         sprintf(output,"xrandr --delmode %s%d %s", "VGA",i ,old_mode);
         system(output); 
      }
      for (i =0; i < 3; i++)
      {
         sprintf(output,"xrandr --addmode %s-%d %s", "VGA",i ,new_mode);
         system(output); 
         sprintf(output,"xrandr --delmode %s-%d %s", "VGA",i ,old_mode);
         system(output); 
      }
		 
      sprintf(output,"xrandr -s %s", new_mode);
      system(output);
	  /* remove old mode */
      sprintf(output,"xrandr --rmmode %s", old_mode);
	  system(output);
	  system("xdotool windowactivate $(xdotool search --class RetroArch)");	/* needs xdotool installed. needed to recaputure window. */
       /* variable for old mode */
	  sprintf(old_mode,"%s", new_mode);
      system("xdotool windowactivate $(xdotool search --class RetroArch)");	/* needs xdotool installed. needed to recaputure window. */
                                                                            /* Second run needed as some times it runs to fast to capture first time */

 return true;
}

const video_display_server_t dispserv_x11 = {
   x11_display_server_init,
   x11_display_server_destroy,
   x11_set_window_opacity,
   NULL,
   x11_set_window_decorations,
   x11_set_resolution, /* set_resolution */
   "x11"
};