package org.xtext.example.mydsl2

import javax.inject.Inject
import org.eclipse.emf.ecore.EObject
import org.eclipse.xtext.EcoreUtil2
import org.eclipse.xtext.naming.IQualifiedNameProvider
import org.eclipse.xtext.xbase.scoping.XImportSectionNamespaceScopeProvider
import org.xtext.example.mydsl2.myDsl.Entity
import org.xtext.example.mydsl2.myDsl.Package

class MyDslXImportSectionNamespaceScopeProvider extends XImportSectionNamespaceScopeProvider {
	
	@Inject IQualifiedNameProvider nameProvider;
	
	override protected internalGetImportedNamespaceResolvers(EObject context, boolean ignoreCase) {
		val result = newArrayList
		result += super.internalGetImportedNamespaceResolvers(context, ignoreCase)
		if (context instanceof Entity) {
			
			val prev = getPrevPack(context)
			if (prev != null) {
				val name = nameProvider.getFullyQualifiedName(prev);
				result += this.createImportedNamespaceResolver(name+".*", ignoreCase)
			}
			
		}
		result
		
	}
	
	def getPrevPack(Entity ctx) {
		val pack = EcoreUtil2.getContainerOfType(ctx, Package)
		val prev = EcoreUtil2.getPreviousSibling(pack)
		if (prev != null && prev instanceof Package) {
			return prev as Package
		}
		return null
		
	}
	
}

class MyDslRuntimeModule extends AbstractMyDslRuntimeModule {
	
	override configureIScopeProviderDelegate(Binder binder) {
		binder.bind(IScopeProvider).annotatedWith(Names.named(AbstractDeclarativeScopeProvider.NAMED_DELEGATE)).to(MyDslXImportSectionNamespaceScopeProvider);
	
	}
	
}

class MyDslJvmModelInferrer extends AbstractModelInferrer {

	@Inject extension JvmTypesBuilder

	@Inject extension IQualifiedNameConverter
	
	def dispatch void infer(Entity entity, IJvmDeclaredTypeAcceptor acceptor, boolean isPreIndexingPhase) {
		// Here you explain how your model is mapped to Java elements, by writing the actual translation code.
		val pack = EcoreUtil2.getContainerOfType(entity, Package)
		val name = pack.name+"."+entity.name
		acceptor.accept(entity.toClass(name.toQualifiedName)) [
			members += entity.toMethod("dummy", Void.TYPE.typeRef()) [
				body = entity.body
			]
		]
	}
}

grammar org.xtext.example.mydsl2.MyDsl with org.eclipse.xtext.xbase.Xbase

generate myDsl "http://www.xtext.org/example/mydsl2/MyDsl"

Model:
	packages+=Package*;
	
Package:
	"package" name=QualifiedName "{"
		enitities+=Entity*
	"}"
;

Entity:
	"entity" name=ID 
	body=XBlockExpression
;

package a {
	entity A {
		
	}
}
package b {
	entity B {
		var A a;
		var C c; // not ok
	}
}

package c {
	entity C {
		var B a; // ok
		var A a; // not ok
	}
}