//=============================================================================
//	EISAskSystem.js
//=============================================================================


/*:
* @author Kino
* @plugindesc A plugin that allows the developer to create intext information.
*
* @param Brackets
* @desc Include brackets around key words / phrases (T/F)
* @default T
*
* @help
* Version: 1.03
*
* This plugin creates the ASK system like in the game Wild Arms 3.
* It allows you to select text within a message window, and ask about that word or phrase.
*
* Setup - Creating Context Word / Phrase
* To create a context word use:
*  \ASK[ Word or phrase you want to ask ] within the message window.
*  These words can then be selected with the arrow keys.
*  Right / Down advances the pointer, left / up moves backward.
*
* Functions
* KR.AskManager.isWordSelect(index)
* -Each word is indexed from 0 to maximum words in the plugin once it appears in
* a message window. You can then assign them to game variables to do conditional
* branching. This function checks if the word has been selected or not.
* Example: KR.AskManager.isWordSelected(0)
*
* KR.AskManager.clearWorldList()
* - This script call clears the world list. This is to give the developer
* better control over when the word list should be cleared. For example,
* to evaluate the conditional branch after the word once the message window
* closes.
* Example: KR.AskManager.clearWordList();
*
*
* Contact me via twitter: EISKino, or on the rpg maker forums.
* Username on forums: Kino.
* Hope this plugin helps, and enjoy!
* --Kino
*/

//=============================================================================
//	Namespace Initialization
//=============================================================================

var KR = KR || {};
KR.Plugins = KR.Plugins || {};

(function($) {
	var parameters = PluginManager.parameters("EISAskSystem");
	var includeBrackets = String(parameters.Brackets);

	$.Plugins.AskSystem = function() {

		function AskManager() {

		}

		AskManager.contextItems = [];
		AskManager.hasContextItems = false;

		AskManager.addContextItem = function(contextItem) {
			this.contextItems.push(contextItem);
			this.setHasContextItems(true);
		};

		AskManager.getContextItem = function(index) {
			if(this.contextItems[index] !== undefined)
				return this.contextItems[index];
			else
				return null;
		};

		AskManager.contextItemLength = function() {
			return this.contextItems.length;
		};

		AskManager.clearContextItemList = function() {
			this.contextItems.length = 0;
		};

		AskManager.isContextSelected = function(index) {
			var contextItem = this.getContextItem(index);
			if(contextItem !== null)
				return (contextItem.selected === true) ? 1 : 0;
		};

		AskManager.contextItemsAvailable = function() {
			return this.hasContextItems;
		};

		AskManager.includeBrackets = function() {
			return /F/ig.test(includeBrackets);
		};

		AskManager.setHasContextItems = function(boolean) {
			this.hasContextItems = boolean;
		};

//=============================================================================
//	Window_Base
//=============================================================================
		Window_Base.prototype.obtainEscapeParam = function(textState) {
		    var arr = /^\[\d+\]/.exec(textState.text.slice(textState.index));
		    var arr2 = /^\[(.*?)\]/.exec(textState.text.slice(textState.index));
		    if (arr) {
		        textState.index += arr[0].length;
		        return parseInt(arr[0].slice(1));
		    } else if(arr2) {
		    	var string = String(arr2[1]);
		    	if(AskManager.includeBrackets()) {
		    		var regex = new RegExp('\\[' + string + '\]', 'ig');
		    		textState.text = textState.text.replace(regex, string);
		    	}
		    	return ({string:string, x: textState.x, y: textState.y});
		    } else {
		        return '';
		    }
		};

//=============================================================================
//	Window_Message
//=============================================================================
		var WindowMessage_initialize = Window_Message.prototype.initialize;
		Window_Message.prototype.initialize = function() {
			WindowMessage_initialize.call(this);
			this._index = -1;
			this.wordList = [];
			this.notProcessing = true;
		};

		var WindowMessage_processEscapeCharacter = Window_Message.prototype.processEscapeCharacter;
		Window_Message.prototype.processEscapeCharacter = function(code, textState) {
			switch(code) {
				case 'ASK':
					this.addAsk(this.obtainEscapeParam(textState));
					break;
				default:
					WindowMessage_processEscapeCharacter.call(this, code, textState);
					break;
			}
		};

		var WindowMessage_update = Window_Message.prototype.update;
		Window_Message.prototype.update = function() {
			if(AskManager.contextItemsAvailable())
				this.processInput();
			this.selectWord();
			this.cancelSelection();
			WindowMessage_update.call(this);

		};

		Window_Message.prototype.processInput = function() {
			if( (this._index > -1) || (this.isCursorMovable()) ){
				if(Input.isTriggered("down") || Input.isTriggered("right")) {
					this.cursorMoveForward();
				}
				if(Input.isTriggered("up") || Input.isTriggered("left")) {
					this.cursorMoveBackward();
				}
			}
		};

		Window_Message.prototype.isCursorMovable = function() {
			if(this.wordList.length > 0)
				return true;
			else
				return false;
		};

		Window_Message.prototype.cursorMoveForward = function() {
			if(this._index < this.wordList.length)
				this.select(1);
		};

		Window_Message.prototype.cursorMoveBackward = function() {
			if(this._index > - 1)
				this.select(-1);
		};

		Window_Message.prototype.index = function() {
			return this._index;
		};

		Window_Message.prototype.select = function(index) {
			this._index += index;
			if(this.index() === this.wordList.length)
				this._index = 0;
			if(this.index() === -1)
				this._index = this.wordList.length -1;
			this.updateCursor();
		};

		Window_Message.prototype.isSelectingWord = function() {
			if(this.index() > -1 && AskManager.contextItemsAvailable()) {
				return true;
			} else {
				return false;
			}
		};
		var WindowMessage_isTriggered = Window_Message.prototype.isTriggered;
		Window_Message.prototype.isTriggered = function() {
			if(AskManager.contextItemsAvailable()) {
				return (Input.isRepeated('ok') || TouchInput.isRepeated());
			} else {
				return WindowMessage_isTriggered.call(this);
			}
		};

		Window_Message.prototype.selectWord = function() {
			if( (this.index() > -1 && this.index() < this.wordList.length) && (Input.isPressed('ok')) ) {
				var word = AskManager.getContextItem(this.index() + (AskManager.contextItemLength() - this.wordList.length));
				word.selected = true;
				this.cancelSelection();
			}
		};

		Window_Message.prototype.cancelSelection = function() {
			if( (this.index() > -1) && (Input.isTriggered('cancel')) ) {
				this.setCursorRect(0, 0, 0, 0);
				this._index = -1;
			}
		};

		Window_Message.prototype.updateCursor = function() {
			if(this.index() > -1 && (this.index() < this.wordList.length)) {
				rect = this.itemRectForContextWord(this.index());
				this.setCursorRect(rect.x, rect.y, rect.width, rect.height);
			} else {
				this.setCursorRect(0, 0, 0, 0);
			}
		};

		Window_Message.prototype.itemRectForContextWord = function(index) {
			var contextItem = this.getWord(index);
			var rect = new Rectangle();
	    rect.x = contextItem.x;
	    rect.y = contextItem.y;
	    var padding = (AskManager.includeBrackets() === false) ? this.textPadding() * 4 : this.textPadding() * 0.5;
	    rect.width = this.textWidth(contextItem.phrase) + padding;
	    rect.height = this.lineHeight();
	    return rect;
		};


		Window_Message.prototype.addAsk = function(textState) {
			AskManager.addContextItem({phrase:textState.string, selected:false, x: textState.x, y: textState.y });
			this.wordList.push({phrase:textState.string, selected:false, x: textState.x, y: textState.y });
		};

		Window_Message.prototype.getWord = function(index) {
			if(this.wordList[index] !== undefined)
				return this.wordList[index];
			else
				return null;
		};

		Window_Message.prototype.clearWordProcessing = function() {
			this.notProcessing = true;
			AskManager.setHasContextItems(false);
			this.setCursorRect(0, 0, 0, 0);
			this._index = -1;
		};

		var WindowMessage_terminateMessage = Window_Message.prototype.terminateMessage;
		Window_Message.prototype.terminateMessage = function() {
			this.clearWordProcessing();
			this.wordList.length = 0;
			WindowMessage_terminateMessage.call(this);
		};

//=============================================================================
// Helpers
//=============================================================================
		$.AskManager = {};
		$.AskManager.isWordSelected = function(index) {
			return AskManager.isContextSelected(index - 1);
		};

		$.AskManager.clearWordList = function() {
			AskManager.clearContextItemList();
		};
	};

	$.Plugins.AskSystem();
})(KR);