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package net.thucydides.core.reflection;


import com.google.common.collect.Lists;
import com.google.common.collect.Sets;

import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.List;
import java.util.Set;

public class MethodFinder {

    private final Class targetClass;

    private MethodFinder(Class targetClass) {
        this.targetClass = targetClass;
    }

    public static MethodFinder inClass(Class targetClass) {
        return new MethodFinder(targetClass);
    }


    public List getAllMethods() {
        Set allMethods = Sets.newHashSet();
        allMethods.addAll(Arrays.asList(targetClass.getDeclaredMethods()));
        allMethods.addAll(Arrays.asList(targetClass.getMethods()));
        addParentMethods(allMethods,targetClass);
        return Lists.newArrayList(allMethods);
    }

    private void addParentMethods(Set allMethods, Class targetClass) {
        if (targetClass.getSuperclass() != null) {
            allMethods.addAll(Arrays.asList(targetClass.getSuperclass().getDeclaredMethods()));
            addParentMethods(allMethods,targetClass.getSuperclass());
        }
    }

    public Method getMethodNamed(String methodName) {
        List methods = getAllMethods();
        Method methodFound = null;
        for (Method method : methods) {
            if (method.getName().equals(methodName)) {
                methodFound = method;
            }
        }
        return methodFound;
    }
}