package com.tsi.comm.server.config;

import lombok.Data;
import lombok.extern.slf4j.Slf4j;
import org.slf4j.MDC;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.SchedulingConfigurer;
import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;
import org.springframework.scheduling.config.ScheduledTaskRegistrar;

import javax.annotation.PostConstruct;

@Slf4j
@Data
@Configuration
@ConfigurationProperties(prefix = "application.scheduling")
public class SchedulingConfig implements SchedulingConfigurer {

    private int poolSize = 0;

    private final int MIN_POOL_SIZE = 10;
    private final int MAX_POOL_SIZE = 20; // 40코어라도 20개까지만 사용

    @PostConstruct
    private void init() {
        if (this.poolSize <= 0) {
            int availableProcessors = Runtime.getRuntime().availableProcessors();
            this.poolSize = Math.max(this.MIN_POOL_SIZE, availableProcessors);
            this.poolSize = Math.min(this.poolSize, this.MAX_POOL_SIZE);
        }

        MDC.put("filename", "config");
        log.info("[SchedulingConfig] ------------");
        log.info("[SchedulingConfig] poolCore: {} EA.", this.poolSize);
        MDC.clear();
    }

    @Override
    public void configureTasks(ScheduledTaskRegistrar scheduledTaskRegistrar) {

        ThreadPoolTaskScheduler threadPoolTaskScheduler = new ThreadPoolTaskScheduler();

        threadPoolTaskScheduler.setPoolSize(this.poolSize);
        threadPoolTaskScheduler.setThreadNamePrefix("tsi-scheduler-");
        threadPoolTaskScheduler.initialize();

        scheduledTaskRegistrar.setTaskScheduler(threadPoolTaskScheduler);
    }
}