/*

	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 

*/

import tools				from '../unify/tools.js';

export default class objectParser{

	parseAsyncMethod( parts, nodeMethods  ) {

		delete parts[0];

		var methodDefinitionParts = parts[2].split("(");

		if( methodDefinitionParts.length > 0 ) {

			delete parts[0];

			parts				= parts.filter(n => n)

			nodeMethods.push( methodDefinitionParts[0] );

			parts[1] = methodDefinitionParts.join("(")

			return true;

		} else {

			return false;

		}

	}

	parseMethod( parts, nodeMethods ) {

		var methodDefinitionParts = parts[1].split("(");

		if( parts.includes("=") ) {

			return false;

		}

		if( methodDefinitionParts.length > 0 ) {

			delete parts[0];

			nodeMethods.push( methodDefinitionParts[0] );

			parts[1] = methodDefinitionParts.join("(");

			return true;

		} else {

			return false;

		}

	}

	parseNodeMethodLine( parts, nodeMethods, term ) {

		if( parts[0] == term ) {

			if( parts[1] == "async" ) {

				return this.parseAsyncMethod( parts, nodeMethods );

			} else {

				return this.parseMethod( parts, nodeMethods );

			}

		}

	}

	recomposeLine( isNodeMethod, lines, i, parts ) {

		if( isNodeMethod ) {

			lines[i] = parts.join(" ");

		}

	}

	parseLine( lines, i, nodeMethods, term ) {

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

		var parts			= stripped.split(" ");

		parts				= parts.filter( n => n );


		var isNodeMethod = this.parseNodeMethodLine( parts, nodeMethods, term );

		this.recomposeLine( isNodeMethod, lines, i, parts );

	}

	getLines( source ) {

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

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

		return lines;
	}

	createOutput( lines, nodeMethods, term ) {

		var body 	= "\n\n";

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


		var output			= new Object();

		output.source 		= body;

		output.nodeMethods	= nodeMethods;

		output.term			= term;

		return output;

	}

	parseNodeMethods( source, term ) {

		var lines			= this.getLines( source );

		var nodeMethods		= new Array();

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

			this.parseLine( lines, i, nodeMethods, term );

		}

		var output	= this.createOutput( lines, nodeMethods, term );

		return output;

	}


	getClassIndices( source ) {

		var regex 			= /\bclass /gi

		var result;

		var indices 		= new Array();

		while ( ( result = regex.exec( source ) ) ) {

			indices.push( result.index );

		}

		return indices;

	}

	defineClassName( classname ) {

		return "\n\n\t__className\t\t\t= \""+ classname +"\"; ";

	}

	defineSourcePath( path ) {

		return "\n\n\t__sourcePath\t\t\t= \""+ tools.slash( path ) +"\"; ";

	}

	defineMethods( output ) {

		return "\n\n\t" + "__" + output.term + "Methods\t\t\t= \""+ output.nodeMethods.join() +"\"; ";

	}

	defineCustomProperties( classname, path, customPrefixes ) {

		var classNameDefinition 	= this.defineClassName( classname );

		var pathDefinition			= this.defineSourcePath( path );


		var prefixArrayString		= "";

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

			var customPrefix	= customPrefixes[i];

			prefixArrayString	+= this.defineMethods( customPrefix ) + "\n";

		}

		//var nodeMethodDefinition	= this.defineMethods( "__nodeMethods", nodeMethods );

		//var stateMethodDefinition	= this.defineMethods( "__stateMethods", stateMethods );

		return classNameDefinition + pathDefinition + prefixArrayString;
	}

	composeLine( source, path, customPrefixes, afterClassIndex ) {

		var afterClassString 	= source.substr( afterClassIndex, source.length );

		var words				= afterClassString.split(" ")

		var classname			= words[1].split("{")[0];

		var beginBodyIndex		= afterClassIndex + afterClassString.indexOf("{") + 1;

		var beginBody			= source.substr( 0, beginBodyIndex );

		var endBody				= source.substr( beginBodyIndex, source.length );


		if( afterClassString.indexOf("{") == -1 ) {

			return source;

		}

		var customDefinitions	= this.defineCustomProperties( classname, path, customPrefixes );


		return beginBody + customDefinitions +  endBody;

	}

	compose( source, path, customMethodPreFixes ) {

		var customPrefixes	= new Array();

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

			var methodPrefix				= customMethodPreFixes[i];

			var nodeMethods					= this.parseNodeMethods( source, methodPrefix );

			source							= nodeMethods.source;

			customPrefixes.push( nodeMethods );

		}
/*
		var nodeMethods					= this.parseNodeMethods( source, "node" );

		source							= nodeMethods.source;

		var stateMethods				= this.parseNodeMethods( source, "state" );

		source							= stateMethods.source;
*/

		var classIndices				= this.getClassIndices( source );


		for ( var i = classIndices.length - 1; i >= 0; i-- ) {

			var afterClassIndex 	= classIndices[ i ];

			source = this.composeLine( source,  path, customPrefixes, afterClassIndex );

		}

		return source;

	}



}