/*

	Copyright (c) 2020, 2023, The Unified Company.

	This code is part of Unify.

	This program is free software; you can redistribute it and/or modify
	it under the terms of the ESA Software Community License - Strong Copyleft LICENSE,
	as published by the ESA.
	See the ESA Software Community License - Strong Copyleft LICENSE, for more details.

	https://unifyjs.org 

*/

export default class multiExtender{

	processExtendLine( stripped, extendsIndex, lines, i ) {

		var bodyOpenIndex 	= stripped.indexOf("{")

		if( bodyOpenIndex == -1 ) {
			
			var extendArgumentsString = stripped.slice( extendsIndex + 7 )
			
		} else {

			var extendArgumentsString = stripped.slice( extendsIndex + 7, bodyOpenIndex )

		}

		var extendArguments 	= extendArgumentsString.split(",");

		extendArguments 		= extendArguments.map( str => str.replace(/\s/g, '') );

		var newArguments 		= " extender(" + extendArguments.join(",") + ")";

		if( extendArguments.length > 1 ) {

			lines[i] = lines[i].replace(extendArgumentsString, newArguments)

		}

	}

	processLine( lines, i ) {

		var stripped 		= lines[i].replaceAll("\t", " ");

		var extendsIndex 	= stripped.indexOf("extends")

		var lineWidth		= stripped.length;

		if( extendsIndex != -1 ) {

			this.processExtendLine( stripped, extendsIndex, lines, i );

		}

	}

	enableMultiExtend( source, depth ) {

		source		= source.replaceAll("\r", "\n");

		var lines 	= source.split("\n");

		for (var i = 0; i < lines.length; i++) {

			this.processLine( lines, i );

		}

		var body 	= "\n\n";

		body 		+= lines.join("\n");

		return body;

	}

}