/**
 * BladeX Commercial License Agreement
 * Copyright (c) 2018-2099, https://bladex.cn. All rights reserved.
 * <p>
 * Use of this software is governed by the Commercial License Agreement
 * obtained after purchasing a license from BladeX.
 * <p>
 * 1. This software is for development use only under a valid license
 * from BladeX.
 * <p>
 * 2. Redistribution of this software's source code to any third party
 * without a commercial license is strictly prohibited.
 * <p>
 * 3. Licensees may copyright their own code but cannot use segments
 * from this software for such purposes. Copyright of this software
 * remains with BladeX.
 * <p>
 * Using this software signifies agreement to this License, and the software
 * must not be used for illegal purposes.
 * <p>
 * THIS SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY. The author is
 * not liable for any claims arising from secondary or illegal development.
 * <p>
 * Author: DreamLu (596392912@qq.com)
 */

package org.springblade.core.redis.config;

import org.springblade.core.redis.ratelimiter.RedisRateLimiterAspect;
import org.springblade.core.redis.ratelimiter.RedisRateLimiterClient;
import org.springframework.boot.autoconfigure.AutoConfiguration;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.context.annotation.Bean;
import org.springframework.core.env.Environment;
import org.springframework.core.io.ClassPathResource;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.script.DefaultRedisScript;
import org.springframework.data.redis.core.script.RedisScript;
import org.springframework.scripting.support.ResourceScriptSource;

import java.util.List;

/**
 * 基于 redis 的分布式限流自动配置
 *
 * @author L.cm
 */
@AutoConfiguration
@ConditionalOnProperty(value = "blade.redis.rate-limiter.enabled", havingValue = "true")
public class RateLimiterAutoConfiguration {

	private RedisScript<Long> redisRateLimiterScript() {
		DefaultRedisScript<Long> redisScript = new DefaultRedisScript<>();
		redisScript.setScriptSource(new ResourceScriptSource(new ClassPathResource("META-INF/scripts/blade_rate_limiter.lua")));
		redisScript.setResultType(Long.class);
		return redisScript;
	}

	@Bean
	@ConditionalOnMissingBean
	public RedisRateLimiterClient redisRateLimiter(StringRedisTemplate redisTemplate,
												   Environment environment) {
		RedisScript<Long> redisRateLimiterScript = redisRateLimiterScript();
		return new RedisRateLimiterClient(redisTemplate, redisRateLimiterScript, environment);
	}

	@Bean
	@ConditionalOnMissingBean
	public RedisRateLimiterAspect redisRateLimiterAspect(RedisRateLimiterClient rateLimiterClient) {
		return new RedisRateLimiterAspect(rateLimiterClient);
	}
}
