package com.interplug.qcast.batch.master;

import com.interplug.qcast.biz.displayItem.DisplayItemService;
import com.interplug.qcast.biz.displayItem.dto.PriceItemSyncResponse;
import com.interplug.qcast.biz.displayItem.dto.PriceSyncResponse;
import com.interplug.qcast.util.InterfaceQsp;
import java.util.Collections;
import java.util.List;
import java.util.function.Consumer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.batch.core.*;
import org.springframework.batch.core.configuration.annotation.StepScope;
import org.springframework.batch.core.job.builder.JobBuilder;
import org.springframework.batch.core.repository.JobRepository;
import org.springframework.batch.core.step.builder.StepBuilder;
import org.springframework.batch.item.ItemReader;
import org.springframework.batch.item.ItemWriter;
import org.springframework.batch.item.support.ListItemReader;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpMethod;
import org.springframework.transaction.PlatformTransactionManager;

/** Price 동기화 배치 */
@Configuration
@Slf4j
public class PriceJobConfiguration implements JobExecutionListener {

  private final InterfaceQsp interfaceQsp;
  private final DisplayItemService displayItemService;

  @Value("${qsp.master-price-batch-url}")
  private String qspInterfaceUrl;

  private PriceSyncResponse priceSyncResponse;

  public PriceJobConfiguration(InterfaceQsp interfaceQsp, DisplayItemService displayItemService) {
    this.interfaceQsp = interfaceQsp;
    this.displayItemService = displayItemService;
  }

  @Override
  public void beforeJob(JobExecution jobExecution) {
    log.info("Job 시작: 초기화 메서드 호출 중...");
    try {
      this.priceSyncResponse =
          interfaceQsp.callApiData(
              HttpMethod.GET, qspInterfaceUrl + "?allYn=N", null, PriceSyncResponse.class);
      log.info("API 호출 완료, 항목 수: {}", this.priceSyncResponse.getModulePriceList().size());
    } catch (Exception e) {
      log.error("priceSyncResponse 갱신 중 오류: {}", e.getMessage());
    }
  }

  @Bean
  public Job priceJob(JobRepository jobRepository, Step modulePriceStep, Step bosPriceStep) {
    return new JobBuilder("priceJob", jobRepository)
        .start(modulePriceStep)
        .next(bosPriceStep)
        .listener(this)
        .build();
  }

  private <T> Step buildStep(
      String stepName,
      JobRepository jobRepository,
      PlatformTransactionManager transactionManager,
      ItemReader<T> reader,
      ItemWriter<T> writer) {
    return new StepBuilder(stepName, jobRepository)
        .<T, T>chunk(100, transactionManager)
        .reader(reader)
        .writer(writer)
        .build();
  }

  @Bean
  public Step modulePriceStep(
      JobRepository jobRepository, PlatformTransactionManager transactionManager) {
    return buildStep(
        "modulePriceStep",
        jobRepository,
        transactionManager,
        modulePriceListReader(),
        createWriter(
            (items) -> {
              try {
                log.debug("Module Price batch processing {} items", items.size());
                displayItemService.setPriceSyncSave(items);
                log.debug("Successfully processed Module Price batch");
              } catch (Exception e) {
                log.error("Error processing Module Price batch: {}", e.getMessage(), e);
                throw new RuntimeException("Failed to process Module Price batch", e);
              }
            },
            "module price"));
  }

  @Bean
  public Step bosPriceStep(
      JobRepository jobRepository, PlatformTransactionManager transactionManager) {
    return buildStep(
        "bosPriceStep",
        jobRepository,
        transactionManager,
        bosPriceListReader(),
        createWriter(
            (items) -> {
              try {
                log.debug("Bos Price batch processing {} items", items.size());
                displayItemService.setPriceSyncSave(items);
                log.debug("Successfully processed Bos Price batch");
              } catch (Exception e) {
                log.error("Error processing Bos Price batch: {}", e.getMessage(), e);
                throw new RuntimeException("Failed to process Bos Price batch", e);
              }
            },
            "bos price"));
  }

  private <T> ListItemReader<T> createReader(List<T> items, String readerName) {
    log.info("{}Reader 호출됨...", readerName);
    return new ListItemReader<>(items != null ? items : Collections.emptyList());
  }

  @Bean
  @StepScope
  public ListItemReader<PriceItemSyncResponse> modulePriceListReader() {
    return createReader(
        priceSyncResponse != null ? priceSyncResponse.getModulePriceList() : null, "module");
  }

  @Bean
  @StepScope
  public ListItemReader<PriceItemSyncResponse> bosPriceListReader() {
    return createReader(
        priceSyncResponse != null ? priceSyncResponse.getBosPriceList() : null, "bos");
  }

  private <T> ItemWriter<T> createWriter(Consumer<List<T>> processor, String writerName) {
    return items -> {
      try {
        List<T> itemList = (List<T>) items.getItems();
        processor.accept(itemList);
        log.info("{}Writer: {} items 처리 완료", writerName, items.size());
      } catch (Exception e) {
        log.error("{}Writer 오류: {}", writerName, e.getMessage());
        throw e;
      }
    };
  }
}