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package com.github.rxyor.spring.boot.redisson;

import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.redisson.Redisson;
import org.redisson.api.RedissonClient;
import org.redisson.client.codec.Codec;
import org.redisson.config.Config;
import org.redisson.spring.starter.RedissonProperties;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.data.redis.RedisProperties;
import org.springframework.boot.autoconfigure.data.redis.RedisProperties.Sentinel;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.core.io.Resource;
import org.springframework.util.ReflectionUtils;

/**
 *
 *
 *
 *
 * @author liuyang
 * @date 2019/11/5 周二 09:58:00
 * @since 1.0.0
 */
public class RedissonAutoConfiguration {

    @Autowired
    private RedissonProperties redissonProperties;

    @Autowired
    private RedisProperties redisProperties;

    @Autowired
    private ApplicationContext ctx;

    @Bean
    public FastJsonCodec fastJsonCodec() {
        return new FastJsonCodec();
    }

    @SuppressWarnings("unchecked")
    @Bean(destroyMethod = "shutdown")
    public RedissonClient redisson(Codec codec) throws IOException {
        Config config = null;
        Method clusterMethod = ReflectionUtils.findMethod(RedisProperties.class, "getCluster");
        Method timeoutMethod = ReflectionUtils.findMethod(RedisProperties.class, "getTimeout");
        Object timeoutValue = ReflectionUtils.invokeMethod(timeoutMethod, redisProperties);
        int timeout;
        if (null == timeoutValue) {
            timeout = 0;
        } else if (!(timeoutValue instanceof Integer)) {
            Method millisMethod = ReflectionUtils.findMethod(timeoutValue.getClass(), "toMillis");
            timeout = ((Long) ReflectionUtils.invokeMethod(millisMethod, timeoutValue)).intValue();
        } else {
            timeout = (Integer) timeoutValue;
        }

        if (redissonProperties.getConfig() != null) {
            try {
                InputStream is = getConfigStream();
                config = Config.fromJSON(is);
            } catch (IOException e) {
                // trying next format
                try {
                    InputStream is = getConfigStream();
                    config = Config.fromYAML(is);
                } catch (IOException e1) {
                    throw new IllegalArgumentException("Can't parse config", e1);
                }
            }
        } else if (redisProperties.getSentinel() != null) {
            Method nodesMethod = ReflectionUtils.findMethod(Sentinel.class, "getNodes");
            Object nodesValue = ReflectionUtils.invokeMethod(nodesMethod, redisProperties.getSentinel());

            String[] nodes;
            if (nodesValue instanceof String) {
                nodes = convert(Arrays.asList(((String) nodesValue).split(",")));
            } else {
                nodes = convert((List) nodesValue);
            }

            config = new Config();
            config.useSentinelServers()
                .setMasterName(redisProperties.getSentinel().getMaster())
                .addSentinelAddress(nodes)
                .setDatabase(redisProperties.getDatabase())
                .setConnectTimeout(timeout)
                .setPassword(redisProperties.getPassword());
        } else if (clusterMethod != null && ReflectionUtils.invokeMethod(clusterMethod, redisProperties) != null) {
            Object clusterObject = ReflectionUtils.invokeMethod(clusterMethod, redisProperties);
            Method nodesMethod = ReflectionUtils.findMethod(clusterObject.getClass(), "getNodes");
            List nodesObject = (List) ReflectionUtils.invokeMethod(nodesMethod, clusterObject);

            String[] nodes = convert(nodesObject);

            config = new Config();
            config.useClusterServers()
                .addNodeAddress(nodes)
                .setConnectTimeout(timeout)
                .setPassword(redisProperties.getPassword());
        } else {
            config = new Config();
            String prefix = "redis://";
            Method method = ReflectionUtils.findMethod(RedisProperties.class, "isSsl");
            if (method != null && (Boolean) ReflectionUtils.invokeMethod(method, redisProperties)) {
                prefix = "rediss://";
            }

            config.useSingleServer()
                .setAddress(prefix + redisProperties.getHost() + ":" + redisProperties.getPort())
                .setConnectTimeout(timeout)
                .setDatabase(redisProperties.getDatabase())
                .setPassword(redisProperties.getPassword());
        }

        config.setCodec(codec);
        return Redisson.create(config);
    }

    private String[] convert(List nodesObject) {
        List nodes = new ArrayList(nodesObject.size());
        for (String node : nodesObject) {
            if (!node.startsWith("redis://") && !node.startsWith("rediss://")) {
                nodes.add("redis://" + node);
            } else {
                nodes.add(node);
            }
        }
        return nodes.toArray(new String[nodes.size()]);
    }

    private InputStream getConfigStream() throws IOException {
        Resource resource = ctx.getResource(redissonProperties.getConfig());
        InputStream is = resource.getInputStream();
        return is;
    }

}