package com.ycl.platform.service.impl;

import com.alibaba.excel.EasyExcel;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.ycl.platform.domain.entity.CalculateRecord;
import com.ycl.platform.domain.entity.CalculateReport;
import com.ycl.platform.domain.excel.CalculateExport;
import com.ycl.platform.domain.form.CalculateReportBackfillForm;
import com.ycl.platform.domain.form.CalculateReportForm;
import com.ycl.platform.domain.query.CalculateReportQuery;
import com.ycl.platform.domain.vo.CalculateReportDetailVO;
import com.ycl.platform.domain.vo.CalculateReportVO;
import com.ycl.platform.mapper.CalculateRecordMapper;
import com.ycl.platform.mapper.CalculateReportMapper;
import com.ycl.platform.service.CalculateReportService;
import com.ycl.system.Result;
import com.ycl.system.page.PageUtil;
import enumeration.general.CalculateReportStatusEnum;
import jakarta.servlet.http.HttpServletResponse;
import lombok.RequiredArgsConstructor;
import lombok.SneakyThrows;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.Assert;
import org.springframework.util.CollectionUtils;

import java.math.BigDecimal;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.util.List;
import java.util.Objects;
import java.util.stream.Collectors;

/**
 * 核算报告 服务实现类
 *
 * @author xp
 * @since 2024-04-23
 */
@Service
@RequiredArgsConstructor
public class CalculateReportServiceImpl extends ServiceImpl<CalculateReportMapper, CalculateReport> implements CalculateReportService {

    private final CalculateReportMapper calculateReportMapper;
    private final CalculateRecordMapper calculateRecordMapper;

    /**
     * 添加
     * @param form
     * @return
     */
    @Override
    public Result add(CalculateReportForm form) {
        CalculateReport entity = CalculateReportForm.getEntityByForm(form, null);
        if(baseMapper.insert(entity) > 0) {
            return Result.ok("添加成功");
        }
        return Result.error("添加失败");
    }

    /**
     * 修改
     * @param form
     * @return
     */
    @Override
    public Result update(CalculateReportForm form) {

        CalculateReport entity = baseMapper.selectById(form.getId());

        // 为空抛IllegalArgumentException，做全局异常处理
        Assert.notNull(entity, "记录不存在");
        BeanUtils.copyProperties(form, entity);
        if (baseMapper.updateById(entity) > 0) {
            return Result.ok("修改成功");
        }
        return Result.error("修改失败");
    }

    /**
     * 批量删除
     * @param ids
     * @return
     */
    @Override
    public Result remove(List<Long> ids) {
        if(baseMapper.deleteBatchIds(ids) > 0) {
            return Result.ok("删除成功");
        }
        return Result.error("删除失败");
    }

    /**
     * id删除
     * @param id
     * @return
     */
    @Override
    public Result removeById(Long id) {
        if(baseMapper.deleteById(id) > 0) {
            return Result.ok("删除成功");
        }
        return Result.error("删除失败");
    }

    /**
     * 分页查询
     * @param query
     * @return
     */
    @Override
    public Result page(CalculateReportQuery query) {
        IPage<CalculateReportVO> page = PageUtil.getPage(query, CalculateReportVO.class);
        baseMapper.page(query, page);
        page.getRecords().stream().forEach(item -> {
            if (Objects.isNull(item)) {
                item.setCanPublish(Boolean.FALSE);
            } else {
                item.setCanPublish(Boolean.TRUE);
            }
        });
        return Result.ok().data(page.getRecords()).total(page.getTotal());
    }

    /**
     * 根据id查找
     * @param id
     * @return
     */
    @Override
    public Result detail(Long id) {
        // 明细列表
        CalculateReportDetailVO detail = baseMapper.getById(id);
        if (Objects.nonNull(detail) && ! CollectionUtils.isEmpty(detail.getRecordList())) {
            if (CalculateReportStatusEnum.NOT_PUBLISH.equals(detail.getStatus())) {
                detail.getRecordList().get(0).setLatest(Boolean.TRUE);
            } else {
                detail.getRecordList().get(0).setLatest(Boolean.FALSE);
            }
        }
        return Result.ok().data(detail);
    }

    /**
     * 列表
     * @return
     */
    @Override
    public Result all() {
        List<CalculateReport> entities = baseMapper.selectList(null);
        List<CalculateReportVO> vos = entities.stream()
                .map(entity -> CalculateReportVO.getVoByEntity(entity, null))
                .collect(Collectors.toList());
        return Result.ok().data(vos);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public Result backfill(CalculateReportBackfillForm form) {
        CalculateReport report = baseMapper.selectById(form.getId());
        if (Objects.isNull(report)) {
            throw new RuntimeException("该核算报告不存在");
        }
        if (CalculateReportStatusEnum.PUBLISHED.equals(report.getStatus())) {
            throw new RuntimeException("最新一次核算报告已经发布，无法修改");
        }
        CalculateReportBackfillForm.RecordForm latestRecord = form.getRecordList().get(0);
        CalculateRecord beforeRecord = calculateRecordMapper.selectById(latestRecord.getId());
        if (Objects.isNull(beforeRecord)) {
            throw new RuntimeException("最近一次核算记录不存在");
        }
        // 计算得到扣款总额（只算最近一条）
        BigDecimal totalDeduct = report.getDeductMoney().subtract(latestRecord.getDeductMoney()).add(latestRecord.getDeductMoney());
        report.setDeductMoney(totalDeduct);
        baseMapper.updateById(report);

        beforeRecord.setDeductMoney(latestRecord.getDeductMoney());
        calculateRecordMapper.updateById(beforeRecord);
        return Result.ok("操作成功");
    }

    @Override
    public Result updatePublishStatus(Long reportId) {
        CalculateReport report = baseMapper.selectById(reportId);
        if (Objects.isNull(report)) {
            throw new RuntimeException("该核算报告不存在");
        }
        if (CalculateReportStatusEnum.NOT_PUBLISH.equals(report.getStatus())) {
            report.setStatus(CalculateReportStatusEnum.PUBLISHED);
        } else if (CalculateReportStatusEnum.PUBLISHED.equals(report.getStatus())) {
            report.setStatus(CalculateReportStatusEnum.NOT_PUBLISH);
        }
        baseMapper.updateById(report);
        return Result.ok("操作成功");
    }

    @Override
    @SneakyThrows
    public void export(Integer contractId, HttpServletResponse response) {
        // 获取数据
        List<CalculateExport> list = baseMapper.exportData(contractId);
        CalculateExport calculateExport = new CalculateExport();
        calculateExport.setRuleName("合计");
        calculateExport.setNum(list.stream().mapToInt(CalculateExport::getNum).sum());
        calculateExport.setScore(list.stream().mapToInt(CalculateExport::getScore).sum());
        list.add(calculateExport);
        // 输出文件
        response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
        response.setCharacterEncoding("utf-8");
        String fileName = URLEncoder.encode("核算报告", StandardCharsets.UTF_8).replace("\\+", "%20");
        response.setHeader("Content-disposition", "attachment;filename*=utf-8''" + fileName + ".xlsx");
        EasyExcel.write(response.getOutputStream(), CalculateExport.class)
                .sheet("核算报告")
                .doWrite(list);
    }
}