/*=============================================================================
 ChoiceRandom.js
----------------------------------------------------------------------------
 (C)2025 Triacontane
 This software is released under the MIT License.
 http://opensource.org/licenses/mit-license.php
----------------------------------------------------------------------------
 Version
 1.0.0 2025/08/11 初版
----------------------------------------------------------------------------
 [X]      : https://x.com/triacontane/
 [GitHub] : https://github.com/triacontane/
=============================================================================*/

/*:
@target MZ
@url https://github.com/triacontane/RPGMakerMV/tree/mz_master/ChoiceRandom.js
@plugindesc Random Choice Plugin
@author Triacontane
@license MIT License

@help
English Help Translator: munokura
This is an unofficial English translation of the plugin help,
created to support global RPG Maker users.
Feedback is welcome to improve translation quality
(see: https://github.com/munokura/triacontane-MZ-plugins ).
Original plugin by Triacontane.
Please check the latest official version at:
https://triacontane.blogspot.com
-----

ChoiceRandom.js

Randomizes the order of options displayed in the "Show Options" event command.
Randomization occurs when the switch specified in the plugin parameters is ON.
The default and cancel options are selected based on the previous settings.

This plugin requires the base plugin "PluginCommonBase.js."
"PluginCommonBase.js" is located in the following folder under the RPG Maker
MZ installation folder:
dlc/BasicResources/plugins/official

Terms of Use:
You may modify and redistribute this plugin without permission, and there are
no restrictions on its use (commercial, 18+, etc.).
This plugin is now yours.

@param switchId
@text Randomization Switch ID
@desc When the specified switch is ON, the options will be randomly sorted.
@type switch
@default 1

@param autoOff
@text Auto OFF
@desc When randomization of choices is performed, the randomization switch will automatically be turned off.
@type boolean
@default true
*/

/*:ja
@plugindesc ランダム選択肢プラグイン
@target MZ
@url https://github.com/triacontane/RPGMakerMV/tree/mz_master/ChoiceRandom.js
@base PluginCommonBase
@orderAfter PluginCommonBase
@author トリアコンタン

@param switchId
@text ランダム化スイッチID
@desc 指定したスイッチがONのとき、選択肢をランダムに並び替えます。
@default 1
@type switch

@param autoOff
@text 自動OFF
@desc 選択肢のランダム化が行われた際、ランダム化スイッチを自動的にOFFにします。
@default true
@type boolean

@help ChoiceRandom.js

イベントコマンド「選択肢の表示」の選択肢の並び順をランダムにします。
プラグインパラメータで指定したスイッチがONのときにランダム化されます。
デフォルト選択肢とキャンセル選択肢は入れ替え前の設定で選択されます。

このプラグインの利用にはベースプラグイン『PluginCommonBase.js』が必要です。
『PluginCommonBase.js』は、RPGツクールMZのインストールフォルダ配下の
以下のフォルダに格納されています。
dlc/BasicResources/plugins/official

利用規約：
 作者に無断で改変、再配布が可能で、利用形態（商用、18禁利用等）
 についても制限はありません。
 このプラグインはもうあなたのものです。
*/

(() => {
    'use strict';
    const script = document.currentScript;
    const param = PluginManagerEx.createParameter(script);

    const _Game_Message_setChoices = Game_Message.prototype.setChoices;
    Game_Message.prototype.setChoices = function(choices, defaultType, cancelType) {
        if (this.isChoiceRandomEnabled()) {
            this._originalChoices = choices.clone();
            arguments[0] = choices.sort(() => Math.random() - 0.5);
            if (defaultType >= 0) {
                arguments[1] = choices.indexOf(this._originalChoices[defaultType]);
            }
            if (cancelType >= 0) {
                arguments[2] = choices.indexOf(this._originalChoices[cancelType]);
            }
        }
        _Game_Message_setChoices.apply(this, arguments);
    };

    Game_Message.prototype.isChoiceRandomEnabled = function() {
        return $gameSwitches.value(param.switchId);
    };

    const _Game_Message_onChoice = Game_Message.prototype.onChoice;
    Game_Message.prototype.onChoice = function(n) {
        if (this.isChoiceRandomEnabled()) {
            if (param.autoOff) {
                $gameSwitches.setValue(param.switchId, false);
            }
            if (n >= 0) {
                arguments[0] = this.findRandomChoiceIndex(n);
            }
        }
        _Game_Message_onChoice.apply(this, arguments);
    };

    Game_Message.prototype.findRandomChoiceIndex = function(selectedIndex) {
        const index = this._originalChoices.indexOf(this._choices[selectedIndex]);
        if (index < 0) {
            PluginManagerEx.throwError(`Choice not found. selected index:[${selectedIndex}]`, script);
        }
        this._originalChoices = null;
        return index;
    };
})();