package com.billpaymentservice.bbps.config;

import org.apache.hc.client5.http.config.RequestConfig;
import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
import org.apache.hc.client5.http.impl.classic.HttpClients;
import org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManagerBuilder;
import org.apache.hc.core5.util.TimeValue;
import org.apache.hc.core5.util.Timeout;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
import org.springframework.web.client.RestTemplate;

@Configuration
public class RestTemplateConfig {

    @Bean
    public RestTemplate restTemplate() {
        // ✅ Timeout config
        RequestConfig requestConfig = RequestConfig.custom()
                .setConnectionRequestTimeout(Timeout.ofSeconds(5)) // pool wait
                .setConnectTimeout(Timeout.ofSeconds(5))           // TCP connect
                .setResponseTimeout(Timeout.ofSeconds(10))         // response read
                .build();

        // ✅ Connection pool manager (HttpClient5 style)
        var connManager = PoolingHttpClientConnectionManagerBuilder.create()
                .setMaxConnTotal(200)
                .setMaxConnPerRoute(50)
                .build();

        // ✅ Build HttpClient
        CloseableHttpClient httpClient = HttpClients.custom()
                .setDefaultRequestConfig(requestConfig)
                .setConnectionManager(connManager)
                .disableAutomaticRetries()
                .evictExpiredConnections()
                .evictIdleConnections(TimeValue.ofSeconds(30))
                .build();

        // ✅ Bind RestTemplate with HttpClient
        HttpComponentsClientHttpRequestFactory factory = new HttpComponentsClientHttpRequestFactory(httpClient);
        factory.setBufferRequestBody(true); 

        return new RestTemplate(factory);
    }
}