/*
 *    Copyright (c) 2018-2025, lengleng All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * Neither the name of the pig4cloud.com developer nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 * Author: lengleng (wangiegie@gmail.com)
 */

package com.pig4cloud.pigx.admin.config;

import cn.hutool.json.JSONArray;
import cn.hutool.json.JSONUtil;
import com.pig4cloud.pigx.admin.service.SysRouteConfService;
import com.pig4cloud.pigx.common.core.constant.CommonConstant;
import com.pig4cloud.pigx.common.gateway.support.DynamicRouteInitEvent;
import com.pig4cloud.pigx.common.gateway.vo.RouteDefinitionVo;
import lombok.AllArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.boot.web.context.WebServerInitializedEvent;
import org.springframework.cloud.gateway.config.GatewayProperties;
import org.springframework.cloud.gateway.config.PropertiesRouteDefinitionLocator;
import org.springframework.cloud.gateway.filter.FilterDefinition;
import org.springframework.cloud.gateway.handler.predicate.PredicateDefinition;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.event.EventListener;
import org.springframework.core.annotation.Order;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.scheduling.annotation.Async;

import java.net.URI;

/**
 * @author lengleng
 * @date 2018/10/31
 * <p>
 * 容器启动后保存配置文件里面的路由信息到Redis
 */
@Slf4j
@Configuration
@AllArgsConstructor
public class DynamicRouteInitRunner {
	private final RedisTemplate redisTemplate;
	private final SysRouteConfService routeConfService;

	@Async
	@Order
	@EventListener({WebServerInitializedEvent.class, DynamicRouteInitEvent.class})
	public void initRoute() {
		Boolean result = redisTemplate.delete(CommonConstant.ROUTE_KEY);
		log.info("初始化网关路由 {} ", result);

		routeConfService.routes().forEach(route -> {
			RouteDefinitionVo vo = new RouteDefinitionVo();
			vo.setId(route.getRouteId());
			vo.setUri(URI.create(route.getUri()));
			vo.setOrder(route.getOrder());

			JSONArray filterObj = JSONUtil.parseArray(route.getFilters());
			vo.setFilters(filterObj.toList(FilterDefinition.class));
			JSONArray predicateObj = JSONUtil.parseArray(route.getPredicates());
			vo.setPredicates(predicateObj.toList(PredicateDefinition.class));

			log.info("加载路由ID：{},{}", route.getRouteId(), vo);
			redisTemplate.setHashValueSerializer(new Jackson2JsonRedisSerializer<>(RouteDefinitionVo.class));
			redisTemplate.opsForHash().put(CommonConstant.ROUTE_KEY, route.getRouteId(), vo);
		});
		log.debug("初始化网关路由结束 ");
	}

	/**
	 * 配置文件设置为空redis 加载的为准
	 *
	 * @return
	 */
	@Bean
	public PropertiesRouteDefinitionLocator propertiesRouteDefinitionLocator() {
		return new PropertiesRouteDefinitionLocator(new GatewayProperties());
	}
}
