package cn.iocoder.yudao.module.srm.service.apply;

import cn.hutool.core.util.StrUtil;
import cn.iocoder.yudao.framework.common.pojo.PageResult;
import cn.iocoder.yudao.framework.common.util.object.BeanUtils;
import cn.iocoder.yudao.framework.common.exception.util.ServiceExceptionUtil;
import cn.iocoder.yudao.module.srm.controller.admin.apply.vo.SrmSupplierApplyPageReqVO;
import cn.iocoder.yudao.module.srm.controller.admin.apply.vo.SrmSupplierApplySaveReqVO;
import cn.iocoder.yudao.module.srm.dal.dataobject.SrmSupplierApplyDO;
import cn.iocoder.yudao.module.srm.dal.dataobject.SrmSupplierDO;
import cn.iocoder.yudao.module.srm.dal.mysql.SrmSupplierApplyMapper;
import cn.iocoder.yudao.module.srm.dal.mysql.SrmSupplierMapper;
import cn.iocoder.yudao.module.srm.enums.ErrorCodeConstants;
import cn.iocoder.yudao.module.srm.enums.SupplierApplyStatusEnum;
import jakarta.annotation.Resource;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.validation.annotation.Validated;

import java.time.LocalDateTime;

/**
 * SRM 供应商准入申请 Service 实现类
 */
@Service
@Validated
public class SrmSupplierApplyServiceImpl implements SrmSupplierApplyService {

    @Resource
    private SrmSupplierApplyMapper supplierApplyMapper;

    @Resource
    private SrmSupplierMapper supplierMapper;

    @Override
    public Long createApply(SrmSupplierApplySaveReqVO createReqVO) {
        // 校验：必须选择 SRM 供应商或手动填写供应商名称
        if (createReqVO.getSupplierId() != null) {
            SrmSupplierDO supplier = supplierMapper.selectById(createReqVO.getSupplierId());
            if (supplier == null) {
                throw ServiceExceptionUtil.exception(ErrorCodeConstants.SUPPLIER_NOT_EXISTS);
            }
        } else if (StrUtil.isBlank(createReqVO.getSupplierName())) {
            throw ServiceExceptionUtil.exception(ErrorCodeConstants.APPLY_SUPPLIER_NAME_REQUIRED);
        }
        SrmSupplierApplyDO apply = BeanUtils.toBean(createReqVO, SrmSupplierApplyDO.class);
        apply.setApplyNo(generateApplyNo());
        apply.setApplyStatus(SupplierApplyStatusEnum.DRAFT.getCode());
        apply.setApplyTime(LocalDateTime.now());
        supplierApplyMapper.insert(apply);
        return apply.getId();
    }

    @Override
    public void updateApply(SrmSupplierApplySaveReqVO updateReqVO) {
        SrmSupplierApplyDO apply = validateApplyExists(updateReqVO.getId());
        if (!SupplierApplyStatusEnum.DRAFT.getCode().equals(apply.getApplyStatus())) {
            throw ServiceExceptionUtil.exception(ErrorCodeConstants.APPLY_STATUS_NOT_DRAFT);
        }
        // 校验：必须选择 SRM 供应商或手动填写供应商名称
        if (updateReqVO.getSupplierId() != null) {
            SrmSupplierDO supplier = supplierMapper.selectById(updateReqVO.getSupplierId());
            if (supplier == null) {
                throw ServiceExceptionUtil.exception(ErrorCodeConstants.SUPPLIER_NOT_EXISTS);
            }
        } else if (StrUtil.isBlank(updateReqVO.getSupplierName())) {
            throw ServiceExceptionUtil.exception(ErrorCodeConstants.APPLY_SUPPLIER_NAME_REQUIRED);
        }
        SrmSupplierApplyDO updateObj = BeanUtils.toBean(updateReqVO, SrmSupplierApplyDO.class);
        supplierApplyMapper.updateById(updateObj);
    }

    @Override
    public void deleteApply(Long id) {
        validateApplyExists(id);
        supplierApplyMapper.deleteById(id);
    }

    @Override
    public SrmSupplierApplyDO getApply(Long id) {
        return supplierApplyMapper.selectById(id);
    }

    @Override
    public PageResult<SrmSupplierApplyDO> getApplyPage(SrmSupplierApplyPageReqVO pageReqVO) {
        return supplierApplyMapper.selectPage(pageReqVO);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void submitApply(Long id) {
        SrmSupplierApplyDO apply = validateApplyExists(id);
        if (!SupplierApplyStatusEnum.DRAFT.getCode().equals(apply.getApplyStatus())) {
            throw ServiceExceptionUtil.exception(ErrorCodeConstants.APPLY_STATUS_NOT_DRAFT);
        }
        apply.setApplyStatus(SupplierApplyStatusEnum.PENDING_PURCHASE.getCode());
        apply.setApplyTime(LocalDateTime.now());
        supplierApplyMapper.updateById(apply);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void reviewPurchase(Long id, String opinion, Boolean passed) {
        SrmSupplierApplyDO apply = validateApplyExists(id);
        if (!SupplierApplyStatusEnum.PENDING_PURCHASE.getCode().equals(apply.getApplyStatus())) {
            throw ServiceExceptionUtil.exception(ErrorCodeConstants.APPLY_STATUS_NOT_PENDING);
        }
        apply.setPurchaseReviewOpinion(opinion);
        apply.setPurchaseReviewTime(LocalDateTime.now());
        apply.setApplyStatus(Boolean.TRUE.equals(passed)
                ? SupplierApplyStatusEnum.PENDING_QUALITY.getCode()
                : SupplierApplyStatusEnum.REJECTED.getCode());
        supplierApplyMapper.updateById(apply);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void reviewQuality(Long id, String opinion, Boolean passed) {
        SrmSupplierApplyDO apply = validateApplyExists(id);
        if (!SupplierApplyStatusEnum.PENDING_QUALITY.getCode().equals(apply.getApplyStatus())) {
            throw ServiceExceptionUtil.exception(ErrorCodeConstants.APPLY_STATUS_NOT_PENDING);
        }
        apply.setQualityReviewOpinion(opinion);
        apply.setQualityReviewTime(LocalDateTime.now());
        apply.setApplyStatus(Boolean.TRUE.equals(passed)
                ? SupplierApplyStatusEnum.PENDING_FINANCE.getCode()
                : SupplierApplyStatusEnum.REJECTED.getCode());
        supplierApplyMapper.updateById(apply);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void reviewFinance(Long id, String opinion, Boolean passed) {
        SrmSupplierApplyDO apply = validateApplyExists(id);
        if (!SupplierApplyStatusEnum.PENDING_FINANCE.getCode().equals(apply.getApplyStatus())) {
            throw ServiceExceptionUtil.exception(ErrorCodeConstants.APPLY_STATUS_NOT_PENDING);
        }
        apply.setFinanceReviewOpinion(opinion);
        apply.setFinanceReviewTime(LocalDateTime.now());
        apply.setApplyStatus(Boolean.TRUE.equals(passed)
                ? SupplierApplyStatusEnum.APPROVED.getCode()
                : SupplierApplyStatusEnum.REJECTED.getCode());
        supplierApplyMapper.updateById(apply);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void approve(Long id) {
        SrmSupplierApplyDO apply = validateApplyExists(id);
        if (!SupplierApplyStatusEnum.APPROVED.getCode().equals(apply.getApplyStatus())) {
            throw ServiceExceptionUtil.exception(ErrorCodeConstants.APPLY_STATUS_NOT_PENDING);
        }
        // 如果已关联 SRM 供应商，不需要重复创建
        if (apply.getSupplierId() == null) {
            SrmSupplierDO supplier = new SrmSupplierDO();
            supplier.setName(apply.getSupplierName());
            supplier.setCompanyNature(apply.getCompanyNature());
            supplier.setRegisteredCapital(apply.getRegisteredCapital());
            supplier.setBusinessLicenseNo(apply.getBusinessLicenseNo());
            supplier.setTaxNo(apply.getTaxNo());
            supplier.setAddress(apply.getAddress());
            supplier.setContactName(apply.getContactName());
            supplier.setContactMobile(apply.getContactMobile());
            supplier.setContactEmail(apply.getContactEmail());
            supplier.setStatus(0);
            supplierMapper.insert(supplier);

            apply.setSupplierId(supplier.getId());
        }
        supplierApplyMapper.updateById(apply);
    }

    // ========== 校验方法 ==========

    private SrmSupplierApplyDO validateApplyExists(Long id) {
        SrmSupplierApplyDO apply = supplierApplyMapper.selectById(id);
        if (apply == null) {
            throw ServiceExceptionUtil.exception(ErrorCodeConstants.APPLY_NOT_EXISTS);
        }
        return apply;
    }

    /**
     * 生成申请编号
     */
    private String generateApplyNo() {
        String prefix = "AP";
        String date = java.time.LocalDate.now().format(java.time.format.DateTimeFormatter.ofPattern("yyyyMM"));
        int seq = (int) (Math.random() * 9000) + 1000;
        return prefix + date + String.format("%04d", seq);
    }

}