/*

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

	This code is part of Unify.



	https://unifyjs.org 

*/


import tools 			from "./tools.js";

import omitMethods 		from "./extender.rejectMethods.js";



export default function extender( ...extenderArguments ) {


	class dummyExtend {

		callInstance( extenderArgument, argumentsOfSuper ) {

			return new extenderArgument( ...argumentsOfSuper );

		}

		getExtendMap() {

			if( typeof document != "undefined") {

				return document.extendMap;
				
			} else {

				return global.extendMap;
				
			}

		}

		removeDuplicates( extendMap, parentClassName ) {

			extendMap[ parentClassName ] = extendMap[ parentClassName ].filter( ( obj, index, arr ) => {

				return arr.map( mapObj => mapObj.__className ).indexOf( obj.__className ) === index;

			});

		}

		saveInstanceInExtendMap( instance ) {

			var parentClassName = this.constructor.name;

			var extendMap		= this.getExtendMap();

			if( !extendMap[ parentClassName ] ) {

				extendMap[ parentClassName ] = new Array();

			}

			extendMap[ parentClassName ].push( instance );

			this.removeDuplicates( extendMap, parentClassName );

		}

		inheritPropertiesA( arg ) {

			var properties 				= Object.getOwnPropertyNames( arg.prototype );

			var propertiesFiltered 		= properties.filter( prop => prop !== "constructor" );

			for ( const prop of propertiesFiltered ) {

				if( !this[prop] ) {

					this[ prop ] = arg.prototype[ prop ];

				}

			}

		}

		inheritPropertiesFromExtends( arg, root, level ) {

			if( level > 0 ) {

				var extendedInstance 	= new arg.constructor();

				var prototype			= Object.getPrototypeOf( extendedInstance );

				var propertyNames		= Object.getOwnPropertyNames( prototype );


				propertyNames.forEach( methodName => {

					if( !omitMethods.includes( methodName ) ) {

						if( !root[ methodName ] ) {

							root[ methodName ] = extendedInstance[ methodName ];

						}

					}

				});

			}

			var extendedClass = tools.getExtendedClass( arg );

			if( extendedClass ) {

				this.inheritPropertiesFromExtends( extendedClass, root, level + 1 );

			}

		}

		constructor( ...argumentsOfSuper ) {

			// extenderArguments = this.constructor.extenderArguments;

			for( const extenderArgument of extenderArguments ) {

				var instance = this.callInstance( extenderArgument, argumentsOfSuper );



				Object.assign( this, instance );

				this.saveInstanceInExtendMap( instance );

				this.inheritPropertiesA( extenderArgument );

				this.inheritPropertiesFromExtends( extenderArgument, this, 0 );

			}

		}

	}


	class table  {

		createInstance() {

			var instance = new arg();

			Object.assign( this, instance );

			return instance;

		}

		assureExtendMap() {

			if( typeof document == "undefined") {

				var extendMap = global.extendMap;
				
			} else {

				var extendMap = document.extendMap;

			}

			if( !extendMap[ parentClassName ] ) {

				extendMap[ parentClassName ] = new Array();

			}

		}

		addInstanceToExtendMap( extendMap, instance ) {

			var parentClassName = this.constructor.name;

			extendMap[ parentClassName ].push( instance );

		}

		updateExtendMap( instance ) {

			this.assureExtendMap();

			this.addInstanceToExtendMap( instance );

		}

		getProperties( arg ) {

			return Object.getOwnPropertyNames( arg.prototype ).filter( prop => prop !== "constructor" );

		}

		updateProperties( arg ) {

			var properties = this.getProperties( arg );

			for ( const property of properties ){

				this[ property ] = arg.prototype[ property ]

			}

		}

		/**
		* Creates an instance of Class.
		*
		* @memberOf Class
		*/
		constructor(...opts) {

			for( const arg of extenderArguments ) {

				var instance	= this.createInstance();

				this.updateExtendMap( instance );

				this.updateProperties( arg );

			}

		}

	}


	var isTable 			= false;

	for( const arg of extenderArguments ) {

		var instance = new arg();

		if( instance.constructor.name == "table" ) {

			isTable = true;

		} 	

	}

	if( isTable ) {

		return table;

	} else {

		//dummyExtend.extenderArguments = extenderArguments;

		return dummyExtend;

	}

}