/*
  menus.c

  Defines the default menus the server provides.  Also includes the
  plug-in functions attached to menu items...

  So far, all menus are static, and not dynamically generated.  I'll
  have to find a way to fix this, since many menu items will be dynamic.
  (clients connected, screens available, etc...)
  
 */


#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>

#include "../shared/debug.h"

#include "drivers/lcd.h"

#include "main.h"
#include "menus.h"
#include "render.h"
#include "serverscreens.h"


int Shutdown_func();
int System_halt_func();
int Reboot_func();
int Close_func();
int OK_func();
int Time24_func(int input);
int Heartbeat_func(int input);
int Backlight_func(int input);
int Server_screen_func(int input);
int Contrast_func(int input);
int Backlight_Brightness_func(int input);
int Backlight_Off_Brightness_func(int input);
int Backlight_Off_func();
int Backlight_On_func();
int Backlight_Open_func();


menu_item main_menu[] = {
  { "LCDproc", 0,		   0 },// Title
  { "Options",	   TYPE_MENU,	   (void *)options_menu},
  { "Screens",	   TYPE_MENU,	   (void *)screens_menu},
  { "Shutdown",    TYPE_MENU,      (void *)shutdown_menu },
  { 0,		   0,		   0 },
   
};

menu_item options_menu[] = {
  { "OPTIONS", TYPE_TITL,	   0},	// Title
//   "24-hour Time", TYPE_CHEK,	   (void *)Time24_func,
  { "Contrast...",  TYPE_SLID,	   (void *)Contrast_func},
  { "Backlight",    TYPE_MENU,      (void *)Backlight_menu},
  { "Heartbeat",    TYPE_CHEK,      (void *)Heartbeat_func},
//  { "Backlight...", TYPE_SLID,      (void *)Backlight_func},
//   "OK",	   TYPE_FUNC,	   (void *)OK_func,
//   "Close Menu",   TYPE_FUNC,	   (void *)Close_func,
//   "Exit Program", TYPE_FUNC,	   (void *)Shutdown_func,
//   "Another Title",TYPE_TITL,	   0,
//   "Main menu?",   TYPE_MENU,      (void *)main_menu,
//   "Nothing!",     TYPE_FUNC,      0,
  { 0,		   0,		   0},
};

menu_item screens_menu[] = {
  { "SCREENS", TYPE_TITL,	   0},	// Title
  { "Server Scr",TYPE_CHEK,      (void *)Server_screen_func},
  { 0,		   0,		   0},
};

menu_item shutdown_menu[] = {
  { "Shut Down...", TYPE_TITL,	   0},	// Title
  { "Kill LCDproc", TYPE_FUNC,	   (void *)Shutdown_func},
  { "System halt",  TYPE_FUNC,      (void *)System_halt_func},
  { "Reboot",       TYPE_FUNC,      (void *)Reboot_func},
  { 0,		   0,		   0},
};

menu_item Backlight_menu[] = {
   { "BACKLIGHT MENU", TYPE_TITL,  0},	// Title
   { "Brightness...",  TYPE_SLID,  (void *)Backlight_Brightness_func},
   { "\"Off\" Brightness",  TYPE_SLID,  (void *)Backlight_Off_Brightness_func},
   { "Backlight Mode:", TYPE_FUNC, 0},	// Label
   { " - Off",          TYPE_FUNC,  Backlight_Off_func},
   { " - On",           TYPE_FUNC,  Backlight_On_func},
   { " - Open",         TYPE_FUNC,  Backlight_Open_func},
   { 0,		   0,		   0},
};



///////////////////////////////////////////////////////////////////////
// Plug-in functions for menu items
//

// Exits the program.
int Shutdown_func()
{
   exit_program(0);
   
   return MENU_KILL;
}

// Shuts down the system, if possible
int System_halt_func()
{
   int err;
   uid_t id;

   id = geteuid();
   
   err = system("init 0");

   if(err < 0) return MENU_KILL;
   if(err == 127) return MENU_KILL;

   // If we're root, exit
   if(id == 0)  exit_program(0);

   // Otherwise, assume shutdown will fail; and show more stats.
   return MENU_KILL;
}

// Shuts down the system and restarts it
int Reboot_func()
{
   int err;
   uid_t id;

   id = geteuid();
   
   err = system("init 6");

   if(err < 0) return MENU_KILL;
   if(err == 127) return MENU_KILL;

   // If we're root, exit
   if(id == 0)  exit_program(0);

   // Otherwise, assume shutdown will fail; and show more stats.
   return MENU_KILL;
}

int Close_func()
{
   return MENU_CLOSE;
}

int OK_func()
{
   return MENU_OK;
}


int Time24_func(int input)
{
   static int status=0;
  
   if(input == MENU_READ) return status;
   if(input == MENU_CHECK) status ^= 1;	 // does something.
   return (status | MENU_OK);
   // The status is "or"-ed with the MENU value to let do_menu()
   // know what to do after selecting the item.	 (two return
   // values in one.  :)

   // Also, "MENU_OK" happens to be zero, so it does not matter
   // unless you want something else (like MENU_CLOSE)
}

int Heartbeat_func(int input)
{
   if(input == MENU_READ) return (heartbeat != HEART_OFF);
   if(input == MENU_CHECK)
   {
      if(heartbeat) heartbeat = HEART_OFF;
      else heartbeat = HEART_OPEN;
   }
   return ((heartbeat != HEART_OFF) | MENU_OK);
}

int Backlight_func(int input)
{
   int status = 128;
   
   switch(backlight)
   {
      case BACKLIGHT_OFF:
	 if(input == MENU_READ) status = 0;
	 if(input == MENU_PLUS)
	 {
	    backlight = BACKLIGHT_OPEN;
	    status = 128;
	 }
	 if(input == MENU_MINUS)
	 {
	    status = 0;
	 }
	 break;
      case BACKLIGHT_ON:
	 if(input == MENU_READ) status = 255;
	 if(input == MENU_PLUS)
	 {
	    status = 255;
	 }
	 if(input == MENU_MINUS)
	 {
	    backlight = BACKLIGHT_OPEN;
	    status = 128;
	 }
	 break;
      case BACKLIGHT_OPEN:
	 if(input == MENU_READ) status = 128;
	 if(input == MENU_PLUS)
	 {
	    backlight = BACKLIGHT_ON;
	    backlight_state = BACKLIGHT_ON;
	    status = 255;
	 }
	 if(input == MENU_MINUS)
	 {
	    backlight = BACKLIGHT_OFF;
	    backlight_state = BACKLIGHT_OFF;
	    status = 0;
	 }
	 break;
   }
   
   /*
   if(input == MENU_READ) return (backlight != BACKLIGHT_OFF);
   if(input == MENU_CHECK)
   {
      if(backlight) backlight = BACKLIGHT_OFF;
      else backlight = BACKLIGHT_OPEN;
   }
   */
   lcd.backlight(backlight_state & BACKLIGHT_ON);
   
   return (status | MENU_OK);
}

int Server_screen_func(int input)
{
   if(input == MENU_READ) return (server_screen->priority < 256);
   if(input == MENU_CHECK)
   {
      if(server_screen->priority < 256) server_screen->priority = 256;
      else server_screen->priority = 128;
   }

   return (MENU_OK | (server_screen->priority < 256));
}

int Contrast_func(int input)
{
   int status;

   status=lcd.contrast(-1);  

   if(input == MENU_READ) return status;
   if(input == MENU_PLUS) status+=5; // does something.
   if(input == MENU_MINUS) status-=5; // does something.

   if(status<0) status=0;
   if(status>255) status=255;
   lcd.contrast(status);
   
   return (status | MENU_OK); 
}


void server_menu()
{
   debug("server_menu()\n");
   
   do_menu(main_menu);
  
}

int Backlight_Brightness_func(int input)
{
   int status = backlight_brightness;

   if(input == MENU_READ) return status;
   if(input == MENU_PLUS) status+=5; // does something.
   if(input == MENU_MINUS) status-=5; // does something.

   if(status<0) status=0;
   if(status>255) status=255;
   lcd.backlight(status);
   
   backlight_brightness = status;
   
   return (status | MENU_OK); 
}

int Backlight_Off_Brightness_func(int input)
{
   int status = backlight_off_brightness;

   if(input == MENU_READ) return status;
   if(input == MENU_PLUS) status+=5; // does something.
   if(input == MENU_MINUS) status-=5; // does something.

   if(status<0) status=0;
   if(status>255) status=255;
   lcd.backlight(status);
   
   backlight_off_brightness = status;
   
   return (status | MENU_OK); 
}

int Backlight_Off_func()
{
   backlight_state = BACKLIGHT_OFF;
   backlight = BACKLIGHT_OFF;
   lcd.backlight(backlight_off_brightness);
   return MENU_OK;
}

int Backlight_On_func()
{
   backlight_state = BACKLIGHT_ON;
   backlight = BACKLIGHT_ON;
   lcd.backlight(backlight_brightness * (backlight_state & BACKLIGHT_ON));
   return MENU_OK;
}

int Backlight_Open_func()
{
   backlight = BACKLIGHT_OPEN;
   return MENU_OK;
}