package com.fjhx.sale.flow;

import cn.hutool.core.util.ObjectUtil;
import com.alibaba.fastjson.JSONObject;
import com.baomidou.mybatisplus.core.toolkit.CollectionUtils;
import com.fjhx.common.enums.FlowStatusEnum;
import com.fjhx.flow.core.FlowDelegate;
import com.fjhx.sale.entity.contract.dto.ContractDto;
import com.fjhx.sale.entity.contract.po.Contract;
import com.fjhx.sale.entity.contract.po.ContractProduct;
import com.fjhx.sale.service.contract.ContractProductService;
import com.fjhx.sale.service.contract.ContractService;
import com.ruoyi.common.core.domain.BaseIdPo;
import com.ruoyi.common.exception.ServiceException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.math.BigDecimal;
import java.util.List;
import java.util.Map;
import java.util.function.Function;
import java.util.stream.Collectors;

/**
 * 合同变更流程
 */
@Component
public class ContractUpdateFlow extends FlowDelegate {

    @Autowired
    private ContractFlow contractFlow;

    @Autowired
    private ContractService contractService;

    @Autowired
    private ContractProductService contractProductService;

    @Override
    public String getFlowKey() {
        return "contract_update_flow";
    }

    /**
     * 发起流程
     *
     * @param flowId     流程ID
     * @param submitData 采购付款数据
     * @return
     */
    @Override
    public Long start(Long flowId, JSONObject submitData) {

        ContractDto contract = submitData.toJavaObject(ContractDto.class);

        // 原合同id不能为空
        Long oldContractId = contract.getOldContractId();
        if (oldContractId == null) {
            throw new ServiceException("原合同id不能为空");
        }

        List<ContractProduct> list = contractProductService.list(q -> q.eq(ContractProduct::getContractId, oldContractId));

        // 赋值待处理数量
        if (CollectionUtils.isNotEmpty(list)) {

            List<ContractProduct> contractProductList = contract.getContractProductList();

            if (ObjectUtil.isEmpty(contractProductList)) {
                throw new ServiceException("没有合同产品");
            }

            Map<Long, ContractProduct> contractProductMap = contractProductList
                    .stream()
                    .peek(item -> {
                        if (item.getId() == null) {
                            throw new ServiceException("合同产品id不能为空");
                        }
                    })
                    .collect(Collectors.toMap(BaseIdPo::getId, Function.identity()));


            for (ContractProduct item : list) {
                ContractProduct contractProduct = contractProductMap.get(item.getId());
                if (contractProduct == null) {
                    throw new ServiceException("产品id为" + item.getId() + "未上传");
                }
                BigDecimal expendQuantity = item.getExpendQuantity().subtract(item.getQuantity().subtract(contractProduct.getQuantity()));
                contractProduct.setExpendQuantity(expendQuantity);
            }

        }

        return contractFlow.start(contract);
    }

    /**
     * 结束流程
     *
     * @param flowId     流程ID
     * @param businessId 业务ID
     * @param submitData 数据
     */
    @Override
    public void end(Long flowId, Long businessId, JSONObject submitData) {

        contractFlow.end(flowId, businessId, submitData);

        // 通过业务id查询合同数据
        Contract contract = contractService.getById(businessId);

        // 原合同改为作废状态
        Long oldContractId = contract.getOldContractId();
        Contract oldContract = contractService.getById(oldContractId);
        if (oldContract == null) {
            throw new ServiceException("原合同不存在");
        }
        oldContract.setStatus(FlowStatusEnum.UPDATE.getKey());
        oldContract.setIsChange("1");
        contractService.updateById(oldContract);
    }

}