/*

	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 simplePath{
	
	useSlash		= true;

	parts			= new Array();

	env				= false;

	beginWithSlash	= true;

	endWithSlash	= true;

	absolute		= false;



	constructor( part ) {

		if( part ) {

			this.preparePart( part );

			this.parts.push( part );

		}

	}

	preparePart( part ) {

		if( this.parts.length == 0 ) {

			if( part.slice( 0,2 ) == ".." ) {

				this.beginWithSlash	= false;

			}

		}

	}

	clone() {

		var clone	= new simplePath();

		clone.useSlash			= this.useSlash;

		clone.parts				= [...this.parts];

		clone.env				= this.env;

		clone.beginWithSlash	= this.beginWithSlash;

		clone.endWithSlash		= this.endWithSlash;

		clone.absolute			= this.absolute;


		return clone;

	}

	getEnvironmentNative() {

		if( typeof document != "undefined" ) {

			return "Browser";

		}

		if( global ) {

			return "Node"

		}

	}

	getEnvironment() {

		if( this.getEnvironmentNative() == "Browser" ) {

			var env	= "Browser";

		} else {

			var env	= process.platform;

		}

		return env;

	}

	getSeparator() {

		var env	= this.getEnvironment();
		
		if( env == "win32" || this.env == "win32" ) {

			return '\\';

		} else {

			return "/";

		}

	}

	slash( path ) {

		const isExtendedLengthPath = path.startsWith('\\\\?\\');

		if ( isExtendedLengthPath ) {

			return path;

		}

		if( this.getSeparator() == "\\" ) {

			return path.replace(/\//g, this.getSeparator());


		} else {

			return path.replace(/\\/g, this.getSeparator());

		}

	}

	formatPath( part ) {

		for (var i = 0; i < 4; i++) {

			part = part.replace("//", "/")

		}

		for (var i = 0; i < 4; i++) {

			part = part.replace("\\\\", "\\")

		}

		if( part.endsWith("/") || part.endsWith("\\") ) {

			part = part.slice(0, -1)

		}

		if( part.startsWith("/") || part.startsWith("\\") ) {

			part = part.substring(1);

		}

		return part;

	}

	add( part ) {

		if( !part ) {

			return false;

		}

		this.preparePart( part );

		var formattedPath = this.formatPath( part );

		this.parts.push( formattedPath );

	}

	removeFirstSlash( part ) {

		if( part.startsWith("/") || part.startsWith("\\") ) {

			part = part.substring(1);

		}

		return part;

	}

	assureFirstSlash( part ) {

		if( !part.startsWith("/") || !part.startsWith("\\") ) {

			part = "/" + part;

		}

		return part;

	}

	removeLastSlash( part ) {

		if( part.endsWith("/") || part.endsWith("\\") ) {

			part = part.slice(0, -1)

		}

		return part;

	}

	assureLastSlash( part ) {

		if( !part.endsWith("/") || !part.endsWith("\\") ) {

			part = part + "/";

		}

		return part;

	}

	lastItemHasExtension() {

		var length		= this.parts.length;

		var lastItem	= this.parts[ length - 1 ];

		if( lastItem.includes(".") ) {

			return true;

		} else {

			return false;

		}

	}

	resolve() {

		var parts	= this.parts;

		var joined	= parts.join( this.getSeparator() );

		if( this.useSlash ) {

			joined	= this.slash( joined );

		}

		if( !this.beginWithSlash ) {

			joined = this.removeFirstSlash( joined );

		} else {

			joined = this.assureFirstSlash( joined );


		}

		if( !this.endWithSlash || this.lastItemHasExtension() ) {

			joined = this.removeLastSlash( joined );

		} else {

			joined = this.assureLastSlash( joined );

		}

		if( this.absolute && global ) {

			return global.path.resolve( joined );

		}

		return joined;

	}
	
}