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/*-
 * ========================LICENSE_START=================================
 * TeamApps
 * ---
 * Copyright (C) 2014 - 2024 TeamApps.org
 * ---
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * =========================LICENSE_END==================================
 */
package org.teamapps.data.extract;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.teamapps.util.ReflectionUtil;

import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

public class BeanPropertyInjector implements PropertyInjector {

	private static final Logger LOGGER = LoggerFactory.getLogger(BeanPropertyInjector.class);
	private static final Map settersByClassAndPropertyName = new ConcurrentHashMap<>();

	private final Map customInjectors = new HashMap<>(0);
	private final boolean fallbackToFields;

	public BeanPropertyInjector() {
		this(false);
	}

	public BeanPropertyInjector(boolean fallbackToFields) {
		this.fallbackToFields = fallbackToFields;
	}

	@Override
	public void setValue(RECORD record, String propertyName, Object value) {
		ValueInjector valueInjector = getValueInjector(record.getClass(), propertyName);
		valueInjector.inject(record, value);
	}

	private ValueInjector getValueInjector(Class clazz, String propertyName) {
		ValueInjector ValueInjector = customInjectors.get(propertyName);
		if (ValueInjector != null) {
			return ValueInjector;
		} else {
			return settersByClassAndPropertyName.computeIfAbsent(
					new ClassAndPropertyName(clazz, propertyName, fallbackToFields),
					classAndPropertyName -> createValueInjector(classAndPropertyName)
			);
		}
	}

	private ValueInjector createValueInjector(ClassAndPropertyName classAndPropertyName) {
		Method setter = ReflectionUtil.findSetter(classAndPropertyName.clazz, classAndPropertyName.propertyName);
		if (setter != null) {
			return (record, value) -> ReflectionUtil.invokeMethod(record, setter, value);
		} else if (fallbackToFields) {
			Field field = ReflectionUtil.findField(classAndPropertyName.clazz, classAndPropertyName.propertyName);
			if (field != null && !Modifier.isFinal(field.getModifiers())) {
				return (record, value) -> ReflectionUtil.setField(record, field, value, true);
			}
		}
		LOGGER.debug("Could not find setter or field for property {} on class {}!", classAndPropertyName.propertyName, classAndPropertyName.getClass().getCanonicalName());
		return (record, value) -> {
		};
	}

	public  BeanPropertyInjector addProperty(String propertyName, ValueInjector valueInjector) {
		this.customInjectors.put(propertyName, valueInjector);
		return this;
	}

}