package com.baeldung.param;

import java.util.Random;

import org.junit.jupiter.api.extension.ExtensionContext;
import org.junit.jupiter.api.extension.ParameterContext;
import org.junit.jupiter.api.extension.ParameterResolutionException;
import org.junit.jupiter.api.extension.ParameterResolver;

public class ValidPersonParameterResolver implements ParameterResolver {

    /**
     * The "good" (valid) data for testing purposes has to go somewhere, right?
     */
    public static Person[] VALID_PERSONS = { new Person().setId(1L)
        .setLastName("Adams")
        .setFirstName("Jill"),
            new Person().setId(2L)
                .setLastName("Baker")
                .setFirstName("James"),
            new Person().setId(3L)
                .setLastName("Carter")
                .setFirstName("Samanta"),
            new Person().setId(4L)
                .setLastName("Daniels")
                .setFirstName("Joseph"),
            new Person().setId(5L)
                .setLastName("English")
                .setFirstName("Jane"),
            new Person().setId(6L)
                .setLastName("Fontana")
                .setFirstName("Enrique"),
            // TODO: ADD MORE DATA HERE
    };

    @Override
    public Object resolveParameter(ParameterContext parameterContext, ExtensionContext extensionContext) throws ParameterResolutionException {
        Object ret = null;
        //
        // Return a random, valid Person object if Person.class is the type of Parameter
        /// to be resolved. Otherwise return null.
        if (parameterContext.getParameter()
            .getType() == Person.class) {
            ret = VALID_PERSONS[new Random().nextInt(VALID_PERSONS.length)];
        }
        return ret;
    }

    @Override
    public boolean supportsParameter(ParameterContext parameterContext, ExtensionContext extensionContext) throws ParameterResolutionException {
        boolean ret = false;
        //
        // If the Parameter.type == Person.class, then we support it, otherwise, get outta here!
        if (parameterContext.getParameter()
            .getType() == Person.class) {
            ret = true;
        }
        return ret;
    }

}