package com.ruoyi.sales.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.ruoyi.approve.bean.vo.ApproveProcessVO;
import com.ruoyi.approve.pojo.ApproveProcess;
import com.ruoyi.approve.service.impl.ApproveProcessServiceImpl;
import com.ruoyi.common.enums.FileNameType;
import com.ruoyi.common.enums.StockOutQualifiedRecordTypeEnum;
import com.ruoyi.common.utils.OrderUtils;
import com.ruoyi.common.utils.SecurityUtils;
import com.ruoyi.framework.security.LoginUser;
import com.ruoyi.other.service.impl.TempFileServiceImpl;
import com.ruoyi.procurementrecord.utils.StockUtils;
import com.ruoyi.sales.dto.SalesLedgerProductDto;
import com.ruoyi.sales.dto.ShippingInfoDto;
import com.ruoyi.sales.mapper.SalesLedgerProductMapper;
import com.ruoyi.sales.mapper.ShippingInfoMapper;
import com.ruoyi.sales.pojo.SalesLedgerProduct;
import com.ruoyi.sales.pojo.ShippingInfo;
import com.ruoyi.sales.service.ShippingInfoService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.collections4.CollectionUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.io.IOException;
import java.math.BigDecimal;
import java.time.LocalDate;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Objects;

/**
 * @author :yys
 * @date : 2025/10/22 9:33
 */
@Service
@Slf4j
public class ShippingInfoServiceImpl extends ServiceImpl<ShippingInfoMapper, ShippingInfo> implements ShippingInfoService {

    @Autowired
    private ShippingInfoMapper shippingInfoMapper;

    @Autowired
    private TempFileServiceImpl tempFileService;
    @Autowired
    private SalesLedgerProductMapper salesLedgerProductMapper;
    @Autowired
    private StockUtils stockUtils;
    @Autowired
    private CommonFileServiceImpl commonFileService;

    @Autowired
    private ApproveProcessServiceImpl approveProcessService;

    @Override
    public IPage<ShippingInfoDto> listPage(Page page, ShippingInfo req) {
        IPage<ShippingInfoDto> listPage = shippingInfoMapper.listPage(page, req);
        listPage.getRecords().forEach(item ->{
            item.setCommonFileList(commonFileService.getFileListByBusinessId(item.getId(), FileNameType.SHIP.getValue()));
        });
        return listPage;
    }

    @Override
    public boolean deductStock(ShippingInfoDto req) throws IOException {
        ShippingInfo byId = this.getById(req.getId());
        if (byId == null) {
            throw new RuntimeException("发货信息不存在");
        }
        //扣减库存（按本次发货数量，支持部分发货）
        if(!"已发货".equals(byId.getStatus())){
            SalesLedgerProduct salesLedgerProduct = salesLedgerProductMapper.selectById(byId.getSalesLedgerProductId());
            BigDecimal shipQuantity = byId.getQuantity() != null ? byId.getQuantity() : salesLedgerProduct.getQuantity();
            stockUtils.substractStock(salesLedgerProduct.getProductModelId(), shipQuantity, StockOutQualifiedRecordTypeEnum.SALE_SHIP_STOCK_OUT.getCode(), req.getId());
        }
        byId.setExpressNumber(req.getExpressNumber());
        byId.setExpressCompany(req.getExpressCompany());
        byId.setStatus("已发货");
        byId.setShippingCarNumber(req.getShippingCarNumber());
        byId.setShippingDate(req.getShippingDate());
        boolean update = this.updateById(byId);
        // 迁移文件
        if(CollectionUtils.isNotEmpty(req.getTempFileIds())){
            tempFileService.migrateTempFilesToFormal(req.getId(), req.getTempFileIds(), FileNameType.SHIP.getValue());
        }
        return update ;
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public boolean addShipping(ShippingInfoDto req) throws Exception {
        // 校验产品行
        SalesLedgerProduct product = salesLedgerProductMapper.selectById(req.getSalesLedgerProductId());
        if (product == null) {
            throw new RuntimeException("产品明细不存在");
        }
        if (product.getQuantity() == null) {
            throw new RuntimeException("产品明细数量为空，无法发货");
        }
        // 未传本次发货数量时默认取产品行全量
        if (req.getQuantity() == null) {
            req.setQuantity(product.getQuantity());
        }
        validateQuantity(req.getSalesLedgerProductId(), req.getQuantity());
        // 发货审批
        LoginUser loginUser = SecurityUtils.getLoginUser();
        String sh = OrderUtils.countTodayByCreateTime(shippingInfoMapper, "SH");
        ApproveProcessVO approveProcessVO = new ApproveProcessVO();
        approveProcessVO.setApproveType(7);
        approveProcessVO.setApproveDeptId(loginUser.getCurrentDeptId());
        approveProcessVO.setApproveReason(req.getType() + ":" + sh);
        List<String> approveUserIds = req.getApproveUserIds();
        approveProcessVO.setApproveUserIds(
                approveUserIds == null || approveUserIds.isEmpty() ? "" : String.join(",", approveUserIds));
        approveProcessVO.setApproveUser(loginUser.getUserId());
        approveProcessVO.setApproveTime(LocalDate.now().toString());
        approveProcessService.addApprove(approveProcessVO);
        // 添加发货单
        req.setShippingNo(sh);
        req.setStatus("待审核");
        return this.save(req);
    }

    /**
     * 剩余可发数量 = 产品行数量 - 状态为"审核通过/已发货"的发货数量之和
     */
    public BigDecimal getUnshippedQuantity(Long salesLedgerProductId) {
        SalesLedgerProduct product = salesLedgerProductMapper.selectById(salesLedgerProductId);
        if (product == null || product.getQuantity() == null) {
            return BigDecimal.ZERO;
        }
        List<ShippingInfo> shippedList = shippingInfoMapper.selectList(new LambdaQueryWrapper<ShippingInfo>()
                .eq(ShippingInfo::getSalesLedgerProductId, salesLedgerProductId)
                .in(ShippingInfo::getStatus, Arrays.asList("审核通过", "已发货")));
        BigDecimal shipped = shippedList.stream()
                .map(ShippingInfo::getQuantity)
                .filter(Objects::nonNull)
                .reduce(BigDecimal.ZERO, BigDecimal::add);
        BigDecimal remaining = product.getQuantity().subtract(shipped);
        return remaining.compareTo(BigDecimal.ZERO) > 0 ? remaining : BigDecimal.ZERO;
    }

    /**
     * 校验本次发货数量：必须大于0且不超过剩余可发数量
     */
    private void validateQuantity(Long salesLedgerProductId, BigDecimal quantity) {
        if (quantity == null || quantity.compareTo(BigDecimal.ZERO) <= 0) {
            throw new RuntimeException("本次发货数量必须大于0");
        }
        BigDecimal remaining = getUnshippedQuantity(salesLedgerProductId);
        if (quantity.compareTo(remaining) > 0) {
            throw new RuntimeException("本次发货数量超过剩余可发数量（剩余可发：" + remaining + "）");
        }
    }

    @Override
    public boolean delete(List<Long> ids) {
        List<ShippingInfo> shippingInfos = shippingInfoMapper.selectList(new LambdaQueryWrapper<ShippingInfo>()
                .in(ShippingInfo::getId, ids));
        if(CollectionUtils.isEmpty(shippingInfos)) return false;
        // 删除附件
        commonFileService.deleteByBusinessIds(ids, FileNameType.SHIP.getValue());
        // 扣已发货库存
        for (ShippingInfo shippingInfo : shippingInfos) {
            if("已发货".equals(shippingInfo.getStatus())) {
                stockUtils.deleteStockOutRecord(shippingInfo.getId(), StockOutQualifiedRecordTypeEnum.SALE_SHIP_STOCK_OUT.getCode());
            }
        }
        // 删除发货审批
        if(CollectionUtils.isNotEmpty(shippingInfos)){
            for (ShippingInfo shippingInfo : shippingInfos){
                ApproveProcess one = approveProcessService.getOne(new LambdaQueryWrapper<ApproveProcess>()
                        .like(ApproveProcess::getApproveReason, shippingInfo.getShippingNo()));
                if(one != null){
                    approveProcessService.delByIds(Collections.singletonList(one.getId()));
                }
            }
        }

        return this.removeBatchByIds(ids);
    }

    @Override
    public List<SalesLedgerProductDto> getReturnManagementDtoById(Long shippingId) {
        return shippingInfoMapper.getReturnManagementDtoById(shippingId );

    }

    @Override
    public List<ShippingInfo> getShippingInfoByCustomerName(String customerName) {
        return shippingInfoMapper.getShippingInfoByCustomerName(customerName);
    }
}