package com.goi.erp.service;

import com.goi.erp.entity.ScheduleJobLog;
import com.goi.erp.repository.ScheduleJobLogRepository;

import jakarta.transaction.Transactional;

import lombok.RequiredArgsConstructor;

import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.Optional;

@Service
@RequiredArgsConstructor
public class ScheduleJobLogService {

    private final ScheduleJobLogRepository repository;

    /**
     * 최근 성공 실행 시작 시각 조회
     * (없으면 Optional.empty)
     */
    @Transactional
    public Optional<LocalDateTime> getLastSuccessStartedAt(Long jobId) {
        return repository.findLastSuccessStartedAt(jobId);
    }

    /**
     * 현재 실행 중인지 여부
     * (중복 실행 방지)
     */
    @Transactional
    public boolean isRunning(Long jobId) {
        return repository.existsBySjlJobIdAndSjlStatus(jobId, "RUNNING");
    }

    /**
     * 실행 시작 로그 생성
     */
    @Transactional
    public ScheduleJobLog createRunningLog(
            Long jobId,
            LocalDateTime scheduledAt,
            Integer lookbackHours,
            Integer overlapMinutes,
            Integer maxRecords,
            String executedBy
    ) {
        ScheduleJobLog log = ScheduleJobLog.builder()
            .sjlJobId(jobId)
            .sjlStatus("RUNNING")
            .sjlScheduledAt(scheduledAt)
            .sjlStartedAt(LocalDateTime.now())
            .sjlLookbackHours(lookbackHours)
            .sjlOverlapMinutes(overlapMinutes)
            .sjlMaxRecords(maxRecords)
            .sjlExecutedBy(executedBy)
            .build();

        return repository.save(log);
    }

    /**
     * 실행 성공 처리
     */
    @Transactional
    public void markSuccess(
            Long logId,
            int processedCount,
            int successCount,
            int failCount
    ) {
        ScheduleJobLog log = repository.findById(logId)
            .orElseThrow(() ->
                new IllegalStateException("ScheduleJobLog not found. id=" + logId)
            );

        log.setSjlStatus("SUCCESS");
        log.setSjlFinishedAt(LocalDateTime.now());
        log.setSjlProcessedCount(processedCount);
        log.setSjlSuccessCount(successCount);
        log.setSjlFailCount(failCount);
    }

    /**
     * 실행 실패 처리
     */
    @Transactional
    public void markFailed(
            Long logId,
            String errorCode,
            String errorMessage
    ) {
        ScheduleJobLog log = repository.findById(logId)
            .orElseThrow(() ->
                new IllegalStateException("ScheduleJobLog not found. id=" + logId)
            );

        log.setSjlStatus("FAILED");
        log.setSjlFinishedAt(LocalDateTime.now());
        log.setSjlErrorCode(errorCode);
        log.setSjlErrorMessage(errorMessage);
    }

    /**
     * 실행 스킵 처리 (중복 실행, 비활성화 등)
     */
    @Transactional
    public ScheduleJobLog markSkipped(
            Long jobId,
            LocalDateTime scheduledAt,
            String reason,
            String executedBy
    ) {
        ScheduleJobLog log = ScheduleJobLog.builder()
            .sjlJobId(jobId)
            .sjlStatus("SKIPPED")
            .sjlScheduledAt(scheduledAt)
            .sjlStartedAt(LocalDateTime.now())
            .sjlFinishedAt(LocalDateTime.now())
            .sjlErrorMessage(reason)
            .sjlExecutedBy(executedBy)
            .build();

        return repository.save(log);
    }
}