/*
 * Copyright (C) 2006-2019 Christopho, Solarus - http://www.solarus-games.org
 *
 * Solarus 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 3 of the License, or
 * (at your option) any later version.
 *
 * Solarus 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, see <http://www.gnu.org/licenses/>.
 */

#ifndef SOLARUS_SAVEGAME_CONVERTER_V1_H
#define SOLARUS_SAVEGAME_CONVERTER_V1_H

#include "solarus/core/Common.h"
#include <string>

namespace Solarus {

class Savegame;

/**
 * \brief Old format of savegames (version 1) kept for compatibility.
 *
 * The version 1 format was binary, not portable, not evolutive and hard to use.
 * In particular, saved values were identified by integer indexes.
 * This class is used to load version 1 savegames and convert them to version 2.
 */
class SavegameConverterV1 {

  public:

    // creation and destruction
    explicit SavegameConverterV1(const std::string& file_name);

    // data
    std::string get_string(int index);
    uint32_t get_integer(int index);
    bool get_boolean(int index);

    // conversion to a savegame version 2
    bool convert_to_v2(Savegame& savegame_v2);

    /**
     * \brief Index of each string saved in the file by the engine.
     */
    enum StringIndex {
      PLAYER_NAME                       = 0,  /**< a name for this savegame */
      STARTING_POINT                    = 1,  /**< the player appears on this destination point on the starting map */

      ITEM_SLOT_0                       = 2,  /**< current item associated to the first item slot
                                               * (X button by default), an empty string means no item */
      ITEM_SLOT_1                       = 3,  /**< current item associated to the second slot
                                               * (V button by default), an empty string means no item */
      STARTING_MAP                      = 4,  /**< id of the map where the player appears */

      /**
       * \name Joypad customizable controls.
       *
       * Variables 1 to 9 indicate the joypad event
       * of each game key: action, sword, item 1, item 2, pause,
       * right, up, left and down.
       * Examples: "button 1", "axis 1 +", "hat 1 left"
       * \{
       */
      JOYPAD_ACTION_KEY                 = 10,
      JOYPAD_SWORD_KEY                  = 11,
      JOYPAD_ITEM_1_KEY                 = 12,
      JOYPAD_ITEM_2_KEY                 = 13,
      JOYPAD_PAUSE_KEY                  = 14,
      JOYPAD_RIGHT_KEY                  = 15,
      JOYPAD_UP_KEY                     = 16,
      JOYPAD_LEFT_KEY                   = 17,
      JOYPAD_DOWN_KEY                   = 18
      /**
       * \}
       */

      // values above 32 are available to the quest
    };

    /**
     * \brief Index of each integer saved in the file.
     *
     * Do not change these numbers, otherwise you might break
     * the existing savegames.
     * Values before 1023 are used by the engine. Scripts only have a
     * read-only access to them.
     * Values above 1024 are available for the maps in reading and writing.
     */
    enum IntegerIndex {

      /**
       * \name Last game status
       * \{
       */
      STARTING_MAP_INT                  = 0,  /**< deprecated (maps are identified by strings now) */
      PAUSE_LAST_SUBMENU                = 1,  /**< last submenu shown in the pause menu */
      INVENTORY_LAST_ITEM_INDEX         = 2,  /**< index of the last item selected in the inventory */
      EQUIPMENT_INITIALIZED             = 3,  /**< 1 if the initial items of the equipment have been set */
      /**
       * \}
       */

      /**
       * \name Current value of rupees, hearts and others
       * \{
       */
      CURRENT_LIFE                      = 10,  /**< current level of life */
      CURRENT_MONEY                     = 11,  /**< current amount of money */
      CURRENT_MAGIC                     = 12,  /**< current level of magic */
      /**
       * \}
       */

      /**
       * \name Maximum values
       * \{
       */
      MAX_LIFE                          = 20,  /**< maximum level of life */
      MAX_MONEY                         = 21,  /**< maximum amount of money */
      MAX_MAGIC                         = 22,  /**< maximum level of magic */
      /**
       * \}
       */

      /**
       * \name Keyboard customizable keys.
       *
       * Variables 35 to 49 indicate the keyboard key
       * associated to each game key: action, sword, item 1, item 2, pause,
       * right, up, left and down.
       * Each integer corresponds to a value of the InputEvent::KeyboardKey
       * enumeration.
       * \{
       */
      KEYBOARD_ACTION_KEY               = 35,
      KEYBOARD_SWORD_KEY                = 36,
      KEYBOARD_ITEM_1_KEY               = 37,
      KEYBOARD_ITEM_2_KEY               = 38,
      KEYBOARD_PAUSE_KEY                = 39,
      KEYBOARD_RIGHT_KEY                = 40,
      KEYBOARD_UP_KEY                   = 41,
      KEYBOARD_LEFT_KEY                 = 42,
      KEYBOARD_DOWN_KEY                 = 43,
      KEYBOARD_ENUM_VERSION             = 49,  /**< Indicates the version of the Input::KeyboardKey enumeration this savegame was created with.
                                                * If the version saved is different from Input::KEYBOARD_ENUM_VERSION, then
                                                * we know it is obsolete and the customization is reset to some default values. */
      /**
       * \}
       */

      /**
       * \name General abilities.
       * \{
       */
      ABILITY_TUNIC                         = 50,
      ABILITY_SWORD                         = 51,
      ABILITY_SHIELD                        = 52,
      ABILITY_LIFT                          = 53,
      ABILITY_SWIM                          = 54,
      ABILITY_SWORD_KNOWLEDGE               = 55,
      ABILITY_DETECT_WEAK_WALLS             = 56,
      ABILITY_SEE_OUTSIDE_WORLD_MINIMAP     = 57,
      ABILITY_GET_BACK_FROM_DEATH           = 58,
      ABILITY_RUN                           = 59,
      /**
       * \}
       */

      /**
       * \name Dungeon-specific abilities and information.
       * Up to 40 dungeons can be saved.
       */
      DUNGEON_1_FINISHED                        = 200,
      DUNGEON_1_ABILITY_SEE_MINIMAP_ROOMS       = 201,
      DUNGEON_1_ABILITY_SEE_MINIMAP_ELEMENTS    = 202,
      DUNGEON_1_ABILITY_OPEN_BIG_LOCKS          = 203,
      DUNGEON_1_ABILITY_OPEN_BOSS_LOCKS         = 204,
      DUNGEON_1_SMALL_KEYS                      = 205,  /**< small key counter in dungeon #1 */
      DUNGEON_1_UNUSED_1                        = 206,  /**< empty place for future new data in dungeon #1 */
      DUNGEON_1_UNUSED_2                        = 207,  /**< empty place for future new data in dungeon #1 */
      DUNGEON_1_UNUSED_3                        = 208,  /**< empty place for future new data in dungeon #1 */
      DUNGEON_1_UNUSED_4                        = 209,  /**< empty place for future new data in dungeon #1 */
      // then, same thing for other dungeons
      DUNGEON_40_UNUSED_4                       = 599,  /**< empty place for future new data in dungeon #40 */


      SAVEGAME_COMPATIBILITY_FORMAT             = 1023  /**< Indicates the version of the savegame format this savegame was created with.
                                                         * If the version saved is different from COMPATIBILITY_FORMAT, then
                                                         * we know it is obsolete (not compatible anymore) and the savegame is destroyed. */

      // values above 1024 are available to the quest
    };

  private:

    /**
     * \brief Contains the data saved.
     *
     * This structure contains the data saved (16 Ko of data are stored).
     * The system can save some strings, integers and boolean values.
     * Some strings and integers are reserved to the engine.
     * See StringIndex and IntegerIndex for the meaning of each string and
     * integer defined by the engine.
     */
    struct SavedData {
      char strings[64][64];     /**< 64 nullptr-terminated strings of 64 bytes each (4 Ko) */
      uint32_t integers[2048];  /**< 2048 integers (8 Ko) */
      uint32_t booleans[1024];  /**< 32768 boolean values (4 Ko) */
    };

    SavedData saved_data;
    std::string file_name;

};

}

#endif

