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.pojo.ApproveProcess;
import com.ruoyi.approve.service.impl.ApproveProcessServiceImpl;
import com.ruoyi.common.enums.FileNameType;
import com.ruoyi.common.enums.StockOutQualifiedRecordTypeEnum;
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.SalesLedger;
import com.ruoyi.sales.pojo.SalesLedgerProduct;
import com.ruoyi.sales.pojo.ShippingInfo;
import com.ruoyi.sales.service.ShippingInfoService;
import com.ruoyi.sales.mapper.SalesLedgerMapper;
import com.ruoyi.stock.mapper.StockInventoryMapper;
import com.ruoyi.stock.pojo.StockInventory;
import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import org.springframework.transaction.annotation.Transactional;
import java.math.BigDecimal;
import java.util.HashMap;
import java.util.Map;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.collections4.CollectionUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.io.IOException;
import java.util.Collections;
import java.util.List;

/**
 * @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;

    @Autowired
    private SalesLedgerMapper salesLedgerMapper;

    @Autowired
    private StockInventoryMapper stockInventoryMapper;

    @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
    @Transactional(rollbackFor = Exception.class)
    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");
        }
        return deductStockByOrder(byId.getSalesLedgerId(), req);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public boolean deductStockByOrder(Long salesLedgerId, ShippingInfoDto req) throws IOException {
        if (salesLedgerId == null) {
            throw new RuntimeException("关联订单不可为空");
        }

        SalesLedger salesLedger = salesLedgerMapper.selectById(salesLedgerId);
        if (salesLedger == null) {
            throw new RuntimeException("关联订单不存在");
        }

        // 检查该订单下是否还有未发货的记录
        List<ShippingInfo> unsentShippings = this.list(new LambdaQueryWrapper<ShippingInfo>()
                .eq(ShippingInfo::getSalesLedgerId, salesLedgerId)
                .ne(ShippingInfo::getStatus, "已发货"));

        // 仅在存在未发货记录时执行库存扣减
        if (CollectionUtils.isNotEmpty(unsentShippings)) {
            // 获取该订单下所有的产品信息进行汇总扣减
            List<SalesLedgerProduct> products = salesLedgerProductMapper.selectList(new LambdaQueryWrapper<SalesLedgerProduct>()
                    .eq(SalesLedgerProduct::getSalesLedgerId, salesLedgerId));

            if (CollectionUtils.isEmpty(products)) {
                throw new RuntimeException("该订单下无产品信息，无法扣减库存");
            }

            //  汇总需求并校验库存
            Map<Long, BigDecimal> modelQtyMap = new HashMap<>();
            for (SalesLedgerProduct p : products) {
                if (p.getProductModelId() == null) continue;
                modelQtyMap.put(p.getProductModelId(), modelQtyMap.getOrDefault(p.getProductModelId(), BigDecimal.ZERO).add(p.getQuantity()));
            }

            for (Map.Entry<Long, BigDecimal> entry : modelQtyMap.entrySet()) {
                Long modelId = entry.getKey();
                BigDecimal totalNeeded = entry.getValue();

                StockInventory stock = stockInventoryMapper.selectOne(new LambdaQueryWrapper<StockInventory>()
                        .eq(StockInventory::getProductModelId, modelId));

                if (stock == null) {
                    throw new RuntimeException("产品规格ID:" + modelId + " 库存记录不存在");
                }

                BigDecimal locked = stock.getLockedQuantity() == null ? BigDecimal.ZERO : stock.getLockedQuantity();
                BigDecimal available = stock.getQualitity().subtract(locked);

                if (totalNeeded.compareTo(available) > 0) {
                    throw new RuntimeException("产品规格ID:" + modelId + " 总计需求 " + totalNeeded + "，可用库存 " + available + "，库存充足校验未通过");
                }
            }

            //  执行订单下所有产品的库存扣减
            for (SalesLedgerProduct p : products) {
                if (p.getProductModelId() == null) continue;
                // 使用 businessId = salesLedgerId 或当前 req.getId()
                stockUtils.substractStock(p.getProductModelId(), p.getQuantity(), StockOutQualifiedRecordTypeEnum.SALE_SHIP_STOCK_OUT.getCode(), salesLedgerId);
            }
        }

        //  更新该订单下所有的发货记录状态为已发货
        LambdaUpdateWrapper<ShippingInfo> updateWrapper = new LambdaUpdateWrapper<>();
        updateWrapper.set(ShippingInfo::getStatus, "已发货")
                .eq(ShippingInfo::getSalesLedgerId, salesLedgerId);
        
        if (req != null) {
            if (req.getExpressNumber() != null) updateWrapper.set(ShippingInfo::getExpressNumber, req.getExpressNumber());
            if (req.getExpressCompany() != null) updateWrapper.set(ShippingInfo::getExpressCompany, req.getExpressCompany());
            if (req.getShippingCarNumber() != null) updateWrapper.set(ShippingInfo::getShippingCarNumber, req.getShippingCarNumber());
            if (req.getShippingDate() != null) updateWrapper.set(ShippingInfo::getShippingDate, req.getShippingDate());
        }
        this.update(updateWrapper);

        //  更新订单状态为 4-已发货
        if (!Integer.valueOf(4).equals(salesLedger.getDeliveryStatus())) {
            salesLedger.setDeliveryStatus(4);
            salesLedgerMapper.updateById(salesLedger);
        }

        //  迁移当前记录涉及的文件
        if (req != null && req.getId() != null && CollectionUtils.isNotEmpty(req.getTempFileIds())) {
            tempFileService.migrateTempFilesToFormal(req.getId(), req.getTempFileIds(), FileNameType.SHIP.getValue());
        }

        return true;
    }

    @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);
    }
}