// Generated by delombok at Sat Feb 25 17:58:34 UTC 2023
package io.cui.tools.property;

import static io.cui.tools.string.MoreStrings.requireNotEmptyTrimmed;
import static java.util.Objects.requireNonNull;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Objects;
import java.util.Optional;
import io.cui.tools.base.Preconditions;
import io.cui.tools.logging.CuiLogger;
import io.cui.tools.reflect.MoreReflection;
import io.cui.tools.string.MoreStrings;

/**
 * Helper class providing convenient methods for reading from / writing to java beans.
 * <h2>Caution:</h2>
 * <p>
 * Use reflection only if there is no other way. Even if some of the problems are
 * minimized by using this type. It should be used either in test-code, what is we actually do, and
 * not production code. An other reason could be framework code. as for that you should exactly know
 * what you do.
 * </p>
 *
 * @author Oliver Wolff
 */
public final class PropertyUtil {
    private static final CuiLogger log = new CuiLogger(PropertyUtil.class);
    static final String UNABLE_TO_WRITE_PROPERTY = "Unable to write property \'%s\' to beanType \'%s\': no suitable write method found. Needed property-type \'%s\'";
    static final String UNABLE_TO_WRITE_PROPERTY_RUNTIME = "Unable to write property \'%s\' to beanType \'%s\'. Needed property-type \'%s\'";
    static final String UNABLE_TO_READ_PROPERTY = "Unable to read property \'%s\' from beanType \'%s\'.";

    // owolff: False Positive, Optional#isPresent is checked
    /**
     * @param bean instance to be read from, must not be null
     * @param propertyName to be read, must not be null nor empty nor blank
     * @return the object read from the property
     * @throws IllegalArgumentException in case the property does not exist (determined by a read
     *             method)
     * @throws IllegalStateException in case some Exception occurred while reading
     */
    @SuppressWarnings("squid:S3655")
    public static Object readProperty(Object bean, String propertyName) {
        log.debug("Reading property \'%s\' from %s", propertyName, bean);
        requireNonNull(bean);
        requireNotEmptyTrimmed(propertyName);
        var reader = MoreReflection.retrieveAccessMethod(bean.getClass(), propertyName);
        Preconditions.checkArgument(reader.isPresent(), UNABLE_TO_READ_PROPERTY, propertyName, bean.getClass());
        try {
            return reader.get().invoke(bean);
        } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
            throw new IllegalStateException(MoreStrings.lenientFormat(UNABLE_TO_READ_PROPERTY, propertyName, bean.getClass()), e);
        }
    }

    /**
     * @param bean instance to be read from, must not be null
     * @param propertyName to be read, must not be null nor empty nor blank
     * @param propertyValue to be set
     * @return In case the property set method is void the given bean will be returned. Otherwise,
     *         the return value of the method invocation, assuming the setMethods is a builder type.
     * @throws IllegalArgumentException in case the property does not exist (determined by a write
     *             method)
     * @throws IllegalStateException in case some Exception occurred while writing
     */
    public static Object writeProperty(Object bean, String propertyName, Object propertyValue) {
        log.debug("Writing \'%s\' to property \'%s\' on \'%s\'", propertyValue, propertyName, bean);
        requireNonNull(bean);
        requireNotEmptyTrimmed(propertyName);
        var writeMethod = determineWriteMethod(bean, propertyName, propertyValue);
        try {
            var result = writeMethod.invoke(bean, propertyValue);
            return Objects.requireNonNullElse(result, bean);
        } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
            var target = propertyValue != null ? propertyValue.getClass().getName() : "Undefined";
            throw new IllegalStateException(MoreStrings.lenientFormat(UNABLE_TO_WRITE_PROPERTY_RUNTIME, propertyName, bean.getClass(), target), e);
        }
    }

    /**
     * Tries to determine the type of given property
     *
     * @param beanType to be checked, must not be null
     * @param propertyName to be checked, must not be null
     * @return an {@link Optional} on the actual type of the property. First it checks an
     *         access-methods, then it tries to directly access the field, and if that fails it uses
     *         the first read method found, {@link Optional#empty()} otherwise.
     */
    public static Optional<Class<?>> resolvePropertyType(Class<?> beanType, String propertyName) {
        var retrieveAccessMethod = MoreReflection.retrieveAccessMethod(beanType, propertyName);
        if (retrieveAccessMethod.isPresent()) {
            log.trace("Found read-method on class \'%s\' for property-name \'%s\'", beanType, propertyName);
            return Optional.of(retrieveAccessMethod.get().getReturnType());
        }
        var field = MoreReflection.accessField(beanType, propertyName);
        if (field.isPresent()) {
            log.trace("Found field on class \'%s\' with name \'%s\'", beanType, propertyName);
            return Optional.of(field.get().getType());
        }
        log.debug("Neither read-method nor field found on class \'%s\' for property-name \'%s\', checking write methods, returning first type found", beanType, propertyName);
        var candidates = MoreReflection.retrieveWriteMethodCandidates(beanType, propertyName);
        if (!candidates.isEmpty()) {
            return Optional.of(candidates.iterator().next().getParameterTypes()[0]);
        }
        log.debug("Unable to detect property-type on class \'%s\' for property-name \'%s\'", beanType, propertyName);
        return Optional.empty();
    }

    static Method determineWriteMethod(Object bean, String propertyName, Object propertyValue) {
        var candidates = MoreReflection.retrieveWriteMethodCandidates(bean.getClass(), propertyName);
        var target = propertyValue != null ? propertyValue.getClass().getName() : "Undefined";
        Preconditions.checkArgument(!candidates.isEmpty(), UNABLE_TO_WRITE_PROPERTY, propertyName, bean.getClass(), target);
        if (null == propertyValue) {
            log.trace("No / Null propertyValue given, so any method should suffice to write property \'%s\' to %s", propertyName, bean);
            return candidates.iterator().next();
        }
        for (Method candidate : candidates) {
            if (MoreReflection.checkWhetherParameterIsAssignable(candidate.getParameterTypes()[0], propertyValue.getClass())) {
                log.trace("Found method %s to write property \'%s\' to %s", candidate, propertyName, bean);
                return candidate;
            }
        }
        throw new IllegalArgumentException(MoreStrings.lenientFormat(UNABLE_TO_WRITE_PROPERTY, propertyName, bean.getClass(), target));
    }

    @java.lang.SuppressWarnings("all")
    @lombok.Generated
    private PropertyUtil() {
        throw new java.lang.UnsupportedOperationException("This is a utility class and cannot be instantiated");
    }
}