package dev.peerat.parser.java.visitor;

import java.util.function.Predicate;

import dev.peerat.parser.java.Class;
import dev.peerat.parser.java.JavaElement;
import dev.peerat.parser.visitor.Visitor;
import dev.peerat.parser.visitor.VisitorBag;

public class JavaClassVisitor extends JavaVisitor<dev.peerat.parser.java.Class>{

	private Predicate<String> nameFilter;
	private Predicate<Integer> modifierFilter;
	private Visitor<JavaElement> elementVisitor;
	
	public JavaClassVisitor(){
		super(dev.peerat.parser.java.Class.class);
	}
	
	public JavaClassVisitor nameFilter(Predicate<String> validator){
		this.nameFilter = (this.nameFilter == null) ? validator : this.nameFilter.and(validator);
		return this;
	}
	
	public JavaClassVisitor isPublic(){
		Predicate<Integer> validator = (mod) -> (mod & 0x1) != 0;
		this.modifierFilter = (this.modifierFilter == null) ? validator : this.modifierFilter.and(validator);
		return this;
	}
	
	public JavaClassVisitor isPrivate(){
		Predicate<Integer> validator = (mod) -> (mod & 0x2) != 0;
		this.modifierFilter = (this.modifierFilter == null) ? validator : this.modifierFilter.and(validator);
		return this;
	}
	
	public JavaClassVisitor isProtected(){
		Predicate<Integer> validator = (mod) -> (mod & 0x4) != 0;
		this.modifierFilter = (this.modifierFilter == null) ? validator : this.modifierFilter.and(validator);
		return this;
	}
	
	public JavaClassVisitor isStatic(){
		Predicate<Integer> validator = (mod) -> (mod & 0x8) != 0;
		this.modifierFilter = (this.modifierFilter == null) ? validator : this.modifierFilter.and(validator);
		return this;
	}
	
	public JavaClassVisitor isFinal(){
		Predicate<Integer> validator = (mod) -> (mod & 0x10) != 0;
		this.modifierFilter = (this.modifierFilter == null) ? validator : this.modifierFilter.and(validator);
		return this;
	}
	
	public JavaClassVisitor isSynchronized(){
		Predicate<Integer> validator = (mod) -> (mod & 0x20) != 0;
		this.modifierFilter = (this.modifierFilter == null) ? validator : this.modifierFilter.and(validator);
		return this;
	}
	
	public JavaClassVisitor isVolatile(){
		Predicate<Integer> validator = (mod) -> (mod & 0x40) != 0;
		this.modifierFilter = (this.modifierFilter == null) ? validator : this.modifierFilter.and(validator);
		return this;
	}
	
	public JavaClassVisitor isTransient(){
		Predicate<Integer> validator = (mod) -> (mod & 0x80) != 0;
		this.modifierFilter = (this.modifierFilter == null) ? validator : this.modifierFilter.and(validator);
		return this;
	}
	
	public JavaClassVisitor isNative(){
		Predicate<Integer> validator = (mod) -> (mod & 0x100) != 0;
		this.modifierFilter = (this.modifierFilter == null) ? validator : this.modifierFilter.and(validator);
		return this;
	}
	
	public JavaClassVisitor isAbstract(){
		Predicate<Integer> validator = (mod) -> (mod & 0x400) != 0;
		this.modifierFilter = (this.modifierFilter == null) ? validator : this.modifierFilter.and(validator);
		return this;
	}
	
	public JavaClassVisitor isStrict(){
		Predicate<Integer> validator = (mod) -> (mod & 0x800) != 0;
		this.modifierFilter = (this.modifierFilter == null) ? validator : this.modifierFilter.and(validator);
		return this;
	}
	
	public JavaClassVisitor isPackageLevel(){
		Predicate<Integer> validator = (mod) -> (mod & 0x1) == 0 && (mod & 0x2) == 0 && (mod & 0x4) == 0;
		this.modifierFilter = (this.modifierFilter == null) ? validator : this.modifierFilter.and(validator);
		return this;
	}
	
	public JavaClassVisitor elements(Visitor<JavaElement> visitor){
		this.elementVisitor = visitor;
		return this;
	}
	
	//				??
	//isSynthetic
	//isMandated
	//				??

	@Override
	public VisitorBag visitElement(Class element){
		VisitorBag bag = new VisitorBag();
		if(nameFilter != null){
			if(!nameFilter.test(element.getName().getValue())) return bag;
		}
		
		if(this.modifierFilter != null){
			//check MOD
		}
		
		if(this.elementVisitor != null){
			for(JavaElement elements : element.getElements()){
				VisitorBag visited = this.elementVisitor.visit(elements);
				bag.merge(visited);
				if(!visited.isValidated()) return bag;
			}
		}
		
		bag.compute(element);
		return bag;
	}

}