package com.imyeyu.api.util;

import com.imyeyu.api.bean.SettingEnum;
import com.imyeyu.api.config.dbsource.TimiServerDBConfig;
import com.imyeyu.api.modules.common.entity.Setting;
import com.imyeyu.api.modules.common.service.SettingService;
import com.imyeyu.java.TimiJava;
import lombok.RequiredArgsConstructor;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.boot.ApplicationArguments;
import org.springframework.boot.ApplicationRunner;
import org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider;
import org.springframework.core.Ordered;
import org.springframework.core.annotation.Order;
import org.springframework.core.type.filter.AssignableTypeFilter;
import org.springframework.stereotype.Component;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

/// 启动时初始化内建系统配置
///
/// @author 夜雨
/// @since 2026-09-08
@Component
@RequiredArgsConstructor
@Order(Ordered.HIGHEST_PRECEDENCE)
public class InitBuiltinSetting implements ApplicationRunner {

	/// 设置枚举所在的扫描包
	private static final String SCAN_PACKAGE = "com.imyeyu.api";

	private final SettingService settingService;

	/// 初始化所有设置枚举对应的系统配置
	///
	/// @param args 启动参数
	/// @throws Exception 初始化异常
	@Override
	@Transactional(TimiServerDBConfig.ROLLBACKER)
	public void run(ApplicationArguments args) throws Exception {
		for (SettingEnum item : findSettingEnumList()) {
			if (settingService.getSystem(item) == null) {
				Setting setting = new Setting();
				setting.setBizType(item.getBizType());
				setting.setBizId(TimiJava.ZERO_UUID);
				setting.setCode(item.name());
				setting.setValue(item.getDefaultValue());
				setting.setValueType(item.getValueType());
				setting.setIsPrivate(true);
				settingService.create(setting);
			}
		}
	}

	/// 扫描所有实现设置枚举接口的枚举常量
	///
	/// @return 设置枚举常量列表
	/// @throws ClassNotFoundException 枚举类无法加载
	private List<SettingEnum> findSettingEnumList() throws ClassNotFoundException {
		ClassPathScanningCandidateComponentProvider scanner = new ClassPathScanningCandidateComponentProvider(false);
		scanner.addIncludeFilter(new AssignableTypeFilter(SettingEnum.class));

		List<BeanDefinition> candidateList = new ArrayList<>(scanner.findCandidateComponents(SCAN_PACKAGE));
		List<SettingEnum> result = new ArrayList<>();
		for (BeanDefinition candidate : candidateList) {
			String className = candidate.getBeanClassName();
			if (className == null) {
				continue;
			}
			Class<?> candidateClass = Class.forName(className);
			if (!candidateClass.isEnum() || !SettingEnum.class.isAssignableFrom(candidateClass)) {
				continue;
			}
			for (Object constant : candidateClass.getEnumConstants()) {
				result.add((SettingEnum) constant);
			}
		}
		return result;
	}
}