/*  RetroArch - A frontend for libretro.
 *  Copyright (C) 2011-2017 - Daniel De Matteis
 *  Copyright (C) 2015-2017 - Andrés Suárez
 *
 *  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 <compat/strl.h>
#include <file/config_file.h>
#include <file/file_path.h>
#include <string/stdstring.h>

#include "input_config.h"
#include "input_remapping.h"
#include "../configuration.h"
#include "../retroarch.h"

static unsigned old_analog_dpad_mode[MAX_USERS];
static unsigned old_libretro_device[MAX_USERS];

/**
 * input_remapping_load_file:
 * @data                     : Path to config file.
 *
 * Loads a remap file from disk to memory.
 *
 * Returns: true (1) if successful, otherwise false (0).
 **/
bool input_remapping_load_file(void *data, const char *path)
{
   unsigned i, j;
   config_file_t *conf  = (config_file_t*)data;
   settings_t *settings = config_get_ptr();
   global_t *global     = global_get_ptr();

   if (!conf ||  string_is_empty(path))
      return false;

   strlcpy(global->name.remapfile, path,
         sizeof(global->name.remapfile));

   for (i = 0; i < MAX_USERS; i++)
   {
      char buf[64];
      char key_ident[RARCH_FIRST_CUSTOM_BIND + 4][128]   = {{0}};
      char key_strings[RARCH_FIRST_CUSTOM_BIND + 4][128] =
      { "b", "y", "select", "start",
         "up", "down", "left", "right",
         "a", "x", "l", "r", "l2", "r2",
         "l3", "r3", "l_x", "l_y", "r_x", "r_y" };

      old_analog_dpad_mode[i] = settings->uints.input_analog_dpad_mode[i];
      old_libretro_device[i] = settings->uints.input_libretro_device[i];

      snprintf(buf, sizeof(buf), "input_player%u", i + 1);

      for (j = 0; j < RARCH_FIRST_CUSTOM_BIND + 4; j++)
      {
         int key_remap = -1;

         fill_pathname_join_delim(key_ident[j], buf,
               key_strings[j], '_', sizeof(key_ident[j]));
         if (config_get_int(conf, key_ident[j], &key_remap)
               && key_remap < RARCH_FIRST_CUSTOM_BIND)
            settings->uints.input_remap_ids[i][j] = key_remap;
      }

      for (j = 0; j < 4; j++)
      {
         int key_remap = -1;

         snprintf(key_ident[RARCH_FIRST_CUSTOM_BIND + j],
               sizeof(key_ident[RARCH_FIRST_CUSTOM_BIND + j]),
               "%s_%s",
               buf,
               key_strings[RARCH_FIRST_CUSTOM_BIND + j]);

         if (config_get_int(conf, key_ident[RARCH_FIRST_CUSTOM_BIND + j],
                  &key_remap) && (key_remap < 4))
            settings->uints.input_remap_ids[i][RARCH_FIRST_CUSTOM_BIND + j] =
               key_remap;
      }

      snprintf(buf, sizeof(buf), "input_player%u_analog_dpad_mode", i + 1);
      CONFIG_GET_INT_BASE(conf, settings, uints.input_analog_dpad_mode[i], buf);

      snprintf(buf, sizeof(buf), "input_libretro_device_p%u", i + 1);
      CONFIG_GET_INT_BASE(conf, settings, uints.input_libretro_device[i], buf);
   }

   config_file_free(conf);

   return true;
}

/**
 * input_remapping_save_file:
 * @path                     : Path to remapping file (relative path).
 *
 * Saves remapping values to file.
 *
 * Returns: true (1) if successful, otherwise false (0).
 **/
bool input_remapping_save_file(const char *path)
{
   bool ret;
   unsigned i, j;
   char buf[PATH_MAX_LENGTH];
   char remap_file[PATH_MAX_LENGTH];
   config_file_t               *conf = NULL;
   unsigned max_users                = *(input_driver_get_uint(INPUT_ACTION_MAX_USERS));
   settings_t              *settings = config_get_ptr();

   buf[0] = remap_file[0]            = '\0';

   fill_pathname_join(buf, settings->paths.directory_input_remapping,
         path, sizeof(buf));

   fill_pathname_noext(remap_file, buf, ".rmp", sizeof(remap_file));

   conf = config_file_new(remap_file);

   if (!conf)
   {
      conf = config_file_new(NULL);
      if (!conf)
         return false;
   }

   for (i = 0; i < max_users; i++)
   {
      char buf[64];
      char key_ident[RARCH_FIRST_CUSTOM_BIND + 4][128]   = {{0}};
      char key_strings[RARCH_FIRST_CUSTOM_BIND + 4][128] = {
         "b", "y", "select", "start",
         "up", "down", "left", "right",
         "a", "x", "l", "r", "l2", "r2",
         "l3", "r3", "l_x", "l_y", "r_x", "r_y" };

      buf[0] = '\0';

      snprintf(buf, sizeof(buf), "input_player%u", i + 1);

      for (j = 0; j < RARCH_FIRST_CUSTOM_BIND + 4; j++)
      {
         fill_pathname_join_delim(key_ident[j], buf,
               key_strings[j], '_', sizeof(key_ident[j]));

         /* only save values that have been modified */
         if(j < RARCH_FIRST_CUSTOM_BIND)
         {
            if(settings->uints.input_remap_ids[i][j] != j)
               config_set_int(conf, key_ident[j], settings->uints.input_remap_ids[i][j]);
            else
               config_unset(conf,key_ident[j]);
         }
         else
         {
            if(settings->uints.input_remap_ids[i][j] != j - RARCH_FIRST_CUSTOM_BIND)
               config_set_int(conf, key_ident[j], settings->uints.input_remap_ids[i][j]);
            else
               config_unset(conf,key_ident[j]);
         }
      }
      snprintf(buf, sizeof(buf), "input_libretro_device_p%u", i + 1);
      config_set_int(conf, buf, input_config_get_device(i));
      snprintf(buf, sizeof(buf), "input_player%u_analog_dpad_mode", i + 1);
      config_set_int(conf, buf, settings->uints.input_analog_dpad_mode[i]);
   }

   ret = config_file_write(conf, remap_file);
   config_file_free(conf);

   return ret;
}

bool input_remapping_remove_file(const char *path)
{
   char buf[PATH_MAX_LENGTH];
   char remap_file[PATH_MAX_LENGTH];
   settings_t    *settings = config_get_ptr();

   buf[0] = remap_file[0]            = '\0';

   fill_pathname_join(buf, settings->paths.directory_input_remapping,
         path, sizeof(buf));

   fill_pathname_noext(remap_file, buf, ".rmp", sizeof(remap_file));

   return remove(remap_file) == 0 ? true : false;
}

void input_remapping_set_defaults(void)
{
   unsigned i, j;
   settings_t *settings = config_get_ptr();

   for (i = 0; i < MAX_USERS; i++)
   {
      for (j = 0; j < RARCH_FIRST_CUSTOM_BIND; j++)
      {
         const struct  retro_keybind *keybind  = &input_config_binds[i][j];
         if (keybind)
            settings->uints.input_remap_ids[i][j] = keybind->id;
      }
      for (j = 0; j < 4; j++)
         settings->uints.input_remap_ids[i][RARCH_FIRST_CUSTOM_BIND + j] = j;

      if (old_analog_dpad_mode[i])
         settings->uints.input_analog_dpad_mode[i] = old_analog_dpad_mode[i];
      if (old_libretro_device[i])
         settings->uints.input_libretro_device[i]  = old_libretro_device[i];
   }
}