//-----------------------------------------------------------------------------
// Game_Item
//
// The game object class for handling skills, items, weapons, and armor. It is
// required because save data should not include the database object itself.
/**
 * The game object class for handling skills, items, weapons, and armor. It is required because save data should not include the database object itself.
 *
 * @class
 */
function Game_Item() {
    this.initialize(...arguments);
}

/**
 * Initialize the item
 *
 * @param {Object} item - The item data object to convert to game item object
 */
Game_Item.prototype.initialize = function(item) {
    this._dataClass = "";
    this._itemId = 0;
    if (item) {
        this.setObject(item);
    }
};

/**
 * Check if this item is a skill
 *
 * @return {boolean} True if skill
 */
Game_Item.prototype.isSkill = function() {
    return this._dataClass === "skill";
};

/**
 * Check if this item is an item
 *
 * @return {boolean} True if item
 */
Game_Item.prototype.isItem = function() {
    return this._dataClass === "item";
};

/**
 * Check if this item is usable (item or skill)
 *
 * @return {boolean} True if item or skill
 */
Game_Item.prototype.isUsableItem = function() {
    return this.isSkill() || this.isItem();
};

/**
 * Check if this item is a weapon
 *
 * @return {boolean} True if weapon
 */
Game_Item.prototype.isWeapon = function() {
    return this._dataClass === "weapon";
};

/**
 * Check if this item is an armor
 *
 * @return {boolean} True if armor
 */
Game_Item.prototype.isArmor = function() {
    return this._dataClass === "armor";
};

/**
 * Check if this item is an equip item (weapon or armor)
 *
 * @return {boolean} True if weapon or armor
 */
Game_Item.prototype.isEquipItem = function() {
    return this.isWeapon() || this.isArmor();
};

/**
 * Check if this item is null
 *
 * @return {boolean} True if null
 */
Game_Item.prototype.isNull = function() {
    return this._dataClass === "";
};

/**
 * Get the item id
 *
 * @return {number} The item's id
 */
Game_Item.prototype.itemId = function() {
    return this._itemId;
};

/**
 * Get the item data object
 *
 * @return {Object|null} The item data object, or null if no item
 */
Game_Item.prototype.object = function() {
    if (this.isSkill()) {
        return $dataSkills[this._itemId];
    } else if (this.isItem()) {
        return $dataItems[this._itemId];
    } else if (this.isWeapon()) {
        return $dataWeapons[this._itemId];
    } else if (this.isArmor()) {
        return $dataArmors[this._itemId];
    } else {
        return null;
    }
};

/**
 * Converts an item data object to an item game object
 *
 * @param {Object} item - The item data object to convert
 */
Game_Item.prototype.setObject = function(item) {
    if (DataManager.isSkill(item)) {
        this._dataClass = "skill";
    } else if (DataManager.isItem(item)) {
        this._dataClass = "item";
    } else if (DataManager.isWeapon(item)) {
        this._dataClass = "weapon";
    } else if (DataManager.isArmor(item)) {
        this._dataClass = "armor";
    } else {
        this._dataClass = "";
    }
    this._itemId = item ? item.id : 0;
};

/**
 * Sets an equip item
 *
 * @param {boolean} isWeapon - If the item is a weapon or armor
 * @param {number} itemId - The item's id
 */
Game_Item.prototype.setEquip = function(isWeapon, itemId) {
    this._dataClass = isWeapon ? "weapon" : "armor";
    this._itemId = itemId;
};