package com.tcm.training.admin.points.service;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.tcm.training.admin.points.dto.PointsConfigSaveRequest;
import com.tcm.training.admin.points.entity.PointsConfig;
import com.tcm.training.admin.points.mapper.PointsConfigMapper;
import com.tcm.training.admin.points.vo.PointsConfigVO;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;

@Service
public class PointsSettingsAppService {

    private final PointsConfigMapper pointsConfigMapper;

    public PointsSettingsAppService(PointsConfigMapper pointsConfigMapper) {
        this.pointsConfigMapper = pointsConfigMapper;
    }

    public PointsConfigVO current() {
        PointsConfig config = pointsConfigMapper.selectOne(new LambdaQueryWrapper<PointsConfig>()
                .eq(PointsConfig::getDeleted, 0)
                .orderByDesc(PointsConfig::getId)
                .last("limit 1"));
        return toVO(config);
    }

    @Transactional
    public PointsConfigVO saveCurrent(PointsConfigSaveRequest request) {
        validateRequest(request);
        PointsConfig currentPending = pointsConfigMapper.selectOne(new LambdaQueryWrapper<PointsConfig>()
                .eq(PointsConfig::getDeleted, 0)
                .eq(PointsConfig::getSettlementStatus, 0)
                .orderByDesc(PointsConfig::getId)
                .last("limit 1"));

        if (currentPending == null) {
            currentPending = new PointsConfig();
            currentPending.setSettlementStatus(0);
            currentPending.setSettledAt(null);
            fillConfig(currentPending, request);
            pointsConfigMapper.insert(currentPending);
        } else {
            fillConfig(currentPending, request);
            currentPending.setSettlementStatus(0);
            currentPending.setSettledAt(null);
            pointsConfigMapper.updateById(currentPending);
        }
        return toVO(currentPending);
    }

    private void validateRequest(PointsConfigSaveRequest request) {
        if (!request.getActivityEndAt().isAfter(request.getActivityStartAt())) {
            throw new IllegalArgumentException("活动结束时间必须晚于活动开始时间");
        }
    }

    private void fillConfig(PointsConfig config, PointsConfigSaveRequest request) {
        config.setActivityStartAt(request.getActivityStartAt());
        config.setActivityEndAt(request.getActivityEndAt());
        config.setGiftCover(request.getGiftCover().trim());
        config.setGiftName(request.getGiftName().trim());
        config.setRequiredPoints(request.getRequiredPoints());
    }

    private PointsConfigVO toVO(PointsConfig config) {
        if (config == null) {
            return null;
        }
        PointsConfigVO vo = new PointsConfigVO();
        vo.setId(config.getId());
        vo.setActivityStartAt(config.getActivityStartAt());
        vo.setActivityEndAt(config.getActivityEndAt());
        vo.setGiftCover(config.getGiftCover());
        vo.setGiftName(config.getGiftName());
        vo.setRequiredPoints(config.getRequiredPoints());
        vo.setSettlementStatus(config.getSettlementStatus());
        vo.setSettledAt(config.getSettledAt());
        return vo;
    }
}