package com.ruoyi.account.service.impl.purchase;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.core.toolkit.CollectionUtils;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.ruoyi.account.bean.dto.purchase.AccountPurchasePaymentDto;
import com.ruoyi.account.bean.vo.purchase.AccountPurchasePaymentVo;
import com.ruoyi.account.mapper.AccountStatementDetailsMapper;
import com.ruoyi.account.mapper.purchase.AccountPaymentApplicationMapper;
import com.ruoyi.account.mapper.purchase.AccountPurchasePaymentMapper;
import com.ruoyi.account.pojo.AccountStatementDetails;
import com.ruoyi.account.pojo.purchase.AccountPaymentApplication;
import com.ruoyi.account.pojo.purchase.AccountPurchasePayment;
import com.ruoyi.account.service.purchase.AccountPurchasePaymentService;
import com.ruoyi.common.exception.ServiceException;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.common.utils.poi.ExcelUtil;
import com.ruoyi.purchase.dto.SavePaymentDto;
import com.ruoyi.purchase.mapper.PurchaseLedgerMapper;
import com.ruoyi.purchase.pojo.PurchaseLedger;
import jakarta.servlet.http.HttpServletResponse;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.List;
import java.util.Random;
import java.util.stream.Collectors;

/**
 * <p>
 * 财务管理--付款单 服务实现类
 * </p>
 *
 * @author 芯导软件（江苏）有限公司
 * @since 2026-05-19 04:14:51
 */
@Service
@RequiredArgsConstructor
public class AccountPurchasePaymentServiceImpl extends ServiceImpl<AccountPurchasePaymentMapper, AccountPurchasePayment> implements AccountPurchasePaymentService {

    private static final DateTimeFormatter CODE_TIME_FORMATTER = DateTimeFormatter.ofPattern("yyMMddHHmmss");
    private final AccountPurchasePaymentMapper accountPurchasePaymentMapper;
    private final AccountStatementDetailsMapper accountStatementDetailsMapper;
    private final AccountPaymentApplicationMapper accountPaymentApplicationMapper;
    private final PurchaseLedgerMapper purchaseLedgerMapper;

    @Override
    public IPage<AccountPurchasePaymentVo> listPageAccountPurchasePayment(Page page, AccountPurchasePaymentDto accountPurchasePaymentDto) {
        return accountPurchasePaymentMapper.listPageAccountPurchasePayment(page, accountPurchasePaymentDto);
    }

    @Override
    public boolean addAccountPurchasePayment(AccountPurchasePayment accountPurchasePayment) {
        if (StringUtils.isEmpty(accountPurchasePayment.getPaymentNumber())) {
            accountPurchasePayment.setPaymentNumber(genAccountPurchasePaymentNo());
        }
        //校验累计付款金额不能超过申请金额
        AccountPaymentApplication accountPaymentApplication = accountPaymentApplicationMapper.selectById(accountPurchasePayment.getAccountPaymentApplicationId());
        List<AccountPurchasePayment> accountPurchasePayments = accountPurchasePaymentMapper.selectList(Wrappers.<AccountPurchasePayment>lambdaQuery().eq(AccountPurchasePayment::getAccountPaymentApplicationId, accountPurchasePayment.getAccountPaymentApplicationId()));
        BigDecimal totalPaymentAmount = accountPurchasePayments.stream().map(AccountPurchasePayment::getPaymentAmount).reduce(BigDecimal.ZERO, BigDecimal::add);
        if (accountPaymentApplication.getPaymentAmount().compareTo(totalPaymentAmount) < 0) {
            throw new ServiceException("累计付款金额不能超过申请金额");
        }
        return save(accountPurchasePayment);
    }

    @Override
    public void exportAccountPurchasePayment(HttpServletResponse response, AccountPurchasePaymentDto accountPurchasePaymentDto) {
        List<AccountPurchasePaymentVo> list = accountPurchasePaymentMapper.listPageAccountPurchasePayment(new Page(1,-1),accountPurchasePaymentDto).getRecords();
        ExcelUtil<AccountPurchasePaymentVo> util = new ExcelUtil<>(AccountPurchasePaymentVo.class);
        util.exportExcel(response, list , "付款单");
    }

    @Override
    public boolean deleteAccountPurchasePayment(List<Long> ids) {
        //如果该付款单已经生成对账单则无法删除
        List<AccountPurchasePayment> accountPurchasePayments = accountPurchasePaymentMapper.selectByIds(ids);
        List<String> strings = accountPurchasePayments.stream().map(AccountPurchasePayment::getPaymentNumber).toList();
        List<AccountStatementDetails> accountStatementDetails = accountStatementDetailsMapper.selectList(Wrappers.<AccountStatementDetails>lambdaQuery()
                .in(AccountStatementDetails::getReceiptNumber, strings));
        if (CollectionUtils.isNotEmpty(accountStatementDetails)){
            throw new ServiceException("该付款单已经生成对账单，无法删除");
        }
        return removeByIds(ids);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public boolean savePayment(SavePaymentDto dto) {
        if (dto.getPaymentDate() == null) {
            throw new ServiceException("请选择付款日期");
        }
        if (dto.getPaymentAmount() == null || dto.getPaymentAmount().compareTo(BigDecimal.valueOf(0.01)) < 0) {
            throw new ServiceException("请输入付款金额");
        }
        if (StringUtils.isEmpty(dto.getPurchaseContractNumber())) {
            throw new ServiceException("采购合同号不能为空");
        }
        if (dto.getSupplierId() == null) {
            throw new ServiceException("供应商不能为空");
        }

        PurchaseLedger purchaseLedger = purchaseLedgerMapper.selectOne(new LambdaQueryWrapper<PurchaseLedger>()
                .eq(PurchaseLedger::getPurchaseContractNumber, dto.getPurchaseContractNumber()));
        if (purchaseLedger == null) {
            throw new ServiceException("采购合同不存在");
        }
        if (purchaseLedger.getSupplierId() == null || purchaseLedger.getSupplierId().longValue() != dto.getSupplierId().longValue()) {
            throw new ServiceException("供应商与合同不匹配");
        }

        List<Long> stockInRecordIds = accountPurchasePaymentMapper.selectStockInRecordIdsByPurchaseLedgerId(purchaseLedger.getId());
        if (CollectionUtils.isEmpty(stockInRecordIds)) {
            throw new ServiceException("该合同暂无可付款的采购入库记录");
        }

        AccountPaymentApplication application = new AccountPaymentApplication();
        application.setSupplierId(dto.getSupplierId().intValue());
        application.setStockInRecordIds(stockInRecordIds.stream().map(String::valueOf).collect(Collectors.joining(",")));
        application.setInvoiceApplicationNo(genPaymentApplicationNo());
        application.setPaymentMethod(dto.getPaymentMethod());
        application.setPaymentContent(dto.getPurchaseContractNumber());
        application.setApplyDate(dto.getPaymentDate());
        application.setRemark(dto.getRemark());
        application.setStatus(1);
        application.setPaymentAmount(dto.getPaymentAmount());
        accountPaymentApplicationMapper.insert(application);

        AccountPurchasePayment payment = new AccountPurchasePayment();
        payment.setAccountPaymentApplicationId(application.getId());
        payment.setSupplierId(dto.getSupplierId().intValue());
        payment.setPaymentDate(dto.getPaymentDate());
        payment.setPaymentMethod(dto.getPaymentMethod());
        payment.setPaymentAmount(dto.getPaymentAmount());
        payment.setPaymentNumber(genAccountPurchasePaymentNo());
        payment.setRemark(dto.getRemark());
        return save(payment);
    }

    private String genPaymentApplicationNo() {
        return "FK" + LocalDateTime.now().format(CODE_TIME_FORMATTER) + new Random().nextInt(10);
    }

    private String genAccountPurchasePaymentNo() {
        return "SK" + LocalDateTime.now().format(CODE_TIME_FORMATTER) + new Random().nextInt(10);
    }
}