/*:
 * @plugindesc Gives the developer more control over the volume fading of BGM, BGS, and ME.
 * @author SumRndmDde
 *
 * @param Replay Fade Time
 * @desc The time, in frames, it takes for BGM or BGS to fade back in after a battle or ME.
 * @default 30
 *
 * @param Auto-BGM Fade In
 * @desc If set to a value greater than 0, whenever the BGM is changed, it will fade in at this duration.
 * @default 0
 *
 * @help
 *
 * Audio Fader
 * Version 1.01
 * SumRndmDde
 *
 *
 * This plugin gives the developer more control over the volume fading of BGM, 
 * BGS, and ME audio effects within the game.
 *
 *
 * ==============================================================================
 *  Plugin Commands
 * ==============================================================================
 *
 * In order to fade in audio, use the following Plugin Commands.
 * In all the Plugin Commands, the "type" needs to be defined. The "type" can be
 * one of the following: BGM, BGS, or ME. That plugin will then affect the 
 * current BGM, BGS, or ME respectively.
 *
 *
 *   FadeIn [type] [duration]
 *
 * Fades in the specific audio type over a duration in frames.
 *
 *
 *   FadeOut [type] [duration]
 *
 * Fades out the specific audio type over a duration in frames.
 *
 *
 *   FadeTo [type] [duration] [volume]
 *
 * Fades the audio type to a specific volume over a duration in frames.
 *
 *
 *   FadeFromTo [type] [duration] [first-volume] [target-volume]
 *
 * Fades the audio type by first setting it to "first volume", then fading it
 * the "target-volume" over a duration in frames.
 *
 *
 * ==============================================================================
 *  End of Help File
 * ==============================================================================
 * 
 * Welcome to the bottom of the Help file.
 *
 *
 * Thanks for reading!
 * If you have questions, or if you enjoyed this Plugin, please check
 * out my YouTube channel!
 *
 * https://www.youtube.com/c/SumRndmDde
 *
 *
 * Until next time,
 *   ~ SumRndmDde
 *
 */
/*:ja
 * @plugindesc BGM、BGS、MEオーディオエフェクトの音量フェードをより細かにコントロールできます。
 * @author SumRndmDde
 * 
 * @param Replay Fade Time
 * @text リプレイフェードタイム
 * @type number
 * @desc 戦闘やMEの後にBGMやBGSがフェードインするまでの時間(フレーム単位)
 * @default 30
 * 
 * @param Auto-BGM Fade In
 * @text 自動BGMフェードイン
 * @type number
 * @desc 0より大きい値に設定すると、BGMが変更される度に、この時間でフェードインします。
 * @default 0
 * 
 * @help
 * 翻訳:ムノクラ
 * https://fungamemake.com/
 * https://twitter.com/munokura/
 * 
 * 元プラグイン: http://sumrndm.site/audio-fader/
 * 
 * 
 * Audio Fader
 * Version 1.01
 * SumRndmDde
 * 
 * 
 * BGM、BGS、MEオーディオエフェクトの音量フェードを
 * より細かにコントロールできます。
 * 
 * 
 * ==========================================================================
 *  プラグインコマンド
 * ==========================================================================
 * 
 * オーディオをフェードインするには、以下のプラグインコマンドを使用します。
 * 全てのプラグインコマンドでは、"type"を定義する必要があります。
 * タイプはBGM、BGS、MEのいずれかです。
 * 現在のBGM、BGS、MEにそれぞれ影響を与えます。
 * 
 * 
 *   FadeIn [type] [duration]
 * 
 * 特定のオーディオタイプをフレーム単位でフェードします。
 * 
 * 
 *   FadeOut [type] [duration]
 * 
 * 特定のオーディオタイプをフレーム単位でフェードアウトします。
 * 
 * 
 *   FadeTo [type] [duration] [volume]
 * 
 * オーディオタイプをフレーム単位で特定の音量にフェードします。
 * 
 * 
 *   FadeFromTo [type] [duration] [first-volume] [target-volume]
 * 
 * オーディオタイプを最初に'first volume'に設定してから、
 * 'target-volume'をフレーム単位でフェードします。
 * 
 * 
 * ==========================================================================
 *  ヘルプファイルの終わり
 * ==========================================================================
 * 
 * ヘルプファイルの終わりへようこそ。
 * 
 * 読んでくれてありがとう!
 * 質問があったり、このプラグインを楽しめたら、
 * 私のYouTubeチャンネルを登録してください!!
 * 
 * https://www.youtube.com/c/SumRndmDde
 * 
 * 
 * 次の機会まで
 *   ~ SumRndmDde
 * 
 */

var SRD = SRD || {};
SRD.AudioFader = SRD.AudioFader || {};
SRD.PluginCommands = SRD.PluginCommands || {};

var Imported = Imported || {};
Imported["SumRndmDde Audio Fader"] = 1.01;

(function (_, $) {

	"use strict";

	//-----------------------------------------------------------------------------
	// SRD.AudioFader
	//-----------------------------------------------------------------------------

	const params = PluginManager.parameters('SRD_AudioFader');

	_.replayFadeTime = parseInt(params['Replay Fade Time']);
	_.autoFadeIn = parseInt(params['Auto-BGM Fade In']);

	//-----------------------------------------------------------------------------
	// SRD.PluginCommands
	//-----------------------------------------------------------------------------

	$['fadein'] = function (args) {
		const type = String(args[0]).toLowerCase();
		const frames = parseInt(args[1]) / 60;
		switch (type) {
			case 'bgm':
				AudioManager.fadeInBgm(frames);
				break;
			case 'bgs':
				AudioManager.fadeInBgs(frames);
				break;
			case 'me':
				AudioManager.fadeInMe(frames);
				break;
		}
	};

	$['fadeout'] = function (args) {
		const type = String(args[0]).toLowerCase();
		const frames = parseInt(args[1]) / 60;
		switch (type) {
			case 'bgm':
				AudioManager.fadeOutBgm(frames);
				break;
			case 'bgs':
				AudioManager.fadeOutBgs(frames);
				break;
			case 'me':
				AudioManager.fadeOutMe(frames);
				break;
		}
	};

	$['fadeto'] = function (args) {
		const type = String(args[0]).toLowerCase();
		const frames = parseInt(args[1]) / 60;
		const target = parseFloat(args[2] / 100).clamp(0, 1);
		switch (type) {
			case 'bgm':
				AudioManager.fadeToBgm(frames, target);
				break;
			case 'bgs':
				AudioManager.fadeToBgs(frames, target);
				break;
			case 'me':
				AudioManager.fadeToMe(frames, target);
				break;
		}
	};

	$['fadefromto'] = function (args) {
		const type = String(args[0]).toLowerCase();
		const frames = parseInt(args[1]) / 60;
		const current = parseFloat(args[2] / 100).clamp(0, 1);
		const target = parseFloat(args[3] / 100).clamp(0, 1);
		switch (type) {
			case 'bgm':
				AudioManager.fadeFromToBgm(frames, current, target);
				break;
			case 'bgs':
				AudioManager.fadeFromToBgm(frames, current, target);
				break;
			case 'me':
				AudioManager.fadeFromToBgm(frames, current, target);
				break;
		}
	};

	//-----------------------------------------------------------------------------
	// WebAudio
	//-----------------------------------------------------------------------------

	WebAudio.prototype.fadeTo = function (duration, target) {
		if (this.isReady()) {
			if (this._gainNode) {
				const gain = this._gainNode.gain;
				const currentTime = WebAudio._context.currentTime;
				gain.setValueAtTime(gain.value, currentTime);
				gain.linearRampToValueAtTime(target, currentTime + duration);
			}
		} else if (this._autoPlay) {
			this.addLoadListener(function () {
				this.fadeTo(duration, target);
			}.bind(this));
		}
	};

	WebAudio.prototype.fadeFromTo = function (duration, current, target) {
		if (this.isReady()) {
			if (this._gainNode) {
				const gain = this._gainNode.gain;
				const currentTime = WebAudio._context.currentTime;
				gain.setValueAtTime(current, currentTime);
				gain.linearRampToValueAtTime(target, currentTime + duration);
			}
		} else if (this._autoPlay) {
			this.addLoadListener(function () {
				this.fadeTo(duration, current, target);
			}.bind(this));
		}
	};

	//-----------------------------------------------------------------------------
	// AudioManager
	//-----------------------------------------------------------------------------

	AudioManager._replayFadeTime = (_.replayFadeTime / 60);

	if (_.autoFadeIn) {

		_.AudioManager_playBgm = AudioManager.playBgm;
		AudioManager.playBgm = function (bgm, pos) {
			let fadeIn = false;
			const bgmName = bgm.name;
			if (!this.isCurrentBgm(bgm) && bgm.name && !this._meBuffer) {
				fadeIn = true;
			}
			_.AudioManager_playBgm.apply(this, arguments);
			if (fadeIn && bgmName !== bgm.name) {
				AudioManager.fadeInBgm(_.autoFadeIn / 60);
			}
		};

	}

	AudioManager.fadeInMe = function (duration) {
		if (this._meBuffer) {
			this._meBuffer.fadeIn(duration);
		}
	};

	AudioManager.fadeToBgm = function (duration, target) {
		if (this._bgmBuffer && this._currentBgm) {
			this._bgmBuffer.fadeTo(duration, target);
		}
	};

	AudioManager.fadeToBgs = function (duration, target) {
		if (this._bgsBuffer && this._currentBgs) {
			this._bgsBuffer.fadeTo(duration, target);
		}
	};

	AudioManager.fadeToMe = function (duration, target) {
		if (this._meBuffer) {
			this._meBuffer.fadeTo(duration, target);
		}
	};

	AudioManager.fadeFromToBgm = function (duration, current, target) {
		if (this._bgmBuffer && this._currentBgm) {
			this._bgmBuffer.fadeFromTo(duration, current, target);
		}
	};

	AudioManager.fadeFromToBgs = function (duration, current, target) {
		if (this._bgsBuffer && this._currentBgs) {
			this._bgsBuffer.fadeFromTo(duration, current, target);
		}
	};

	AudioManager.fadeFromToMe = function (duration, current, target) {
		if (this._meBuffer) {
			this._meBuffer.fadeFromTo(duration, current, target);
		}
	};

	//-----------------------------------------------------------------------------
	// Game_Interpreter
	//-----------------------------------------------------------------------------

	if (!SRD.Game_Interpreter_pluginCommand) {

		SRD.Game_Interpreter_pluginCommand = Game_Interpreter.prototype.pluginCommand;
		Game_Interpreter.prototype.pluginCommand = function (command, args) {
			const com = command.trim().toLowerCase();
			if ($[com]) {
				$[com].call(this, args);
				return;
			}
			SRD.Game_Interpreter_pluginCommand.apply(this, arguments);
		};

	}

})(SRD.AudioFader, SRD.PluginCommands);