package cn.iocoder.yudao.module.mes.service.wm.miscissue;

import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.util.ObjUtil;
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.util.object.ObjectUtils;
import cn.iocoder.yudao.module.bpm.api.task.BpmProcessInstanceApi;
import cn.iocoder.yudao.module.bpm.api.task.dto.BpmProcessInstanceCreateReqDTO;
import cn.iocoder.yudao.module.bpm.enums.task.BpmTaskStatusEnum;
import cn.iocoder.yudao.module.mes.controller.admin.wm.miscissue.vo.MesWmMiscIssueImportExcelVO;
import cn.iocoder.yudao.module.mes.controller.admin.wm.miscissue.vo.MesWmMiscIssueImportRespVO;
import cn.iocoder.yudao.module.mes.controller.admin.wm.miscissue.vo.MesWmMiscIssuePageReqVO;
import cn.iocoder.yudao.module.mes.controller.admin.wm.miscissue.vo.MesWmMiscIssueSaveReqVO;
import cn.iocoder.yudao.module.mes.dal.dataobject.wm.miscissue.MesWmMiscIssueDO;
import cn.iocoder.yudao.module.mes.dal.dataobject.wm.miscissue.MesWmMiscIssueLineDO;
import cn.iocoder.yudao.module.mes.dal.mysql.wm.miscissue.MesWmMiscIssueMapper;
import cn.iocoder.yudao.module.mes.enums.wm.MesWmMiscIssueStatusEnum;
import cn.iocoder.yudao.module.mes.enums.MesBizTypeConstants;
import cn.iocoder.yudao.module.mes.enums.wm.MesWmTransactionTypeEnum;
import cn.iocoder.yudao.module.mes.service.wm.transaction.MesWmTransactionService;
import cn.iocoder.yudao.module.mes.service.wm.transaction.dto.MesWmTransactionSaveReqDTO;
import cn.iocoder.yudao.module.system.api.approval.ApprovalConfigApi;
import cn.iocoder.yudao.module.system.api.user.AdminUserApi;
import cn.iocoder.yudao.module.system.api.user.dto.AdminUserRespDTO;
import jakarta.annotation.Resource;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.validation.annotation.Validated;

import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Set;
import java.util.concurrent.atomic.AtomicInteger;

import static cn.iocoder.yudao.framework.common.exception.util.ServiceExceptionUtil.exception;
import static cn.iocoder.yudao.framework.common.util.collection.CollectionUtils.convertList;
import static cn.iocoder.yudao.framework.security.core.util.SecurityFrameworkUtils.getLoginUserId;
import static cn.iocoder.yudao.module.mes.enums.ErrorCodeConstants.*;

/**
 * MES 杂项出库单 Service 实现类
 */
@Service
@Validated
@Slf4j
public class MesWmMiscIssueServiceImpl implements MesWmMiscIssueService {

    /**
     * 杂项出库单审批的业务类型编码
     *
     * 与 system_approval_config.biz_type 对应，审核人在「系统管理 - 审批配置」中维护。
     */
    private static final String MISC_ISSUE_APPROVE_BIZ_TYPE = "misc_issue_approve";

    /**
     * 杂项出库单审批的 BPM 流程定义 Key
     */
    private static final String MISC_ISSUE_APPROVE_PROCESS_KEY = "misc_issue_approve";

    @Resource
    private MesWmMiscIssueMapper miscIssueMapper;

    @Resource
    private BpmProcessInstanceApi bpmProcessInstanceApi;

    @Resource
    private MesWmMiscIssueLineService miscIssueLineService;
    @Resource
    private MesWmTransactionService wmTransactionService;
    @Resource
    private AdminUserApi adminUserApi;
    @Resource
    private ApprovalConfigApi approvalConfigApi;

    @Override
    public Long createMiscIssue(MesWmMiscIssueSaveReqVO createReqVO) {
        // 校验编码唯一
        validateCodeUnique(null, createReqVO.getCode());

        // 插入
        MesWmMiscIssueDO issue = BeanUtils.toBean(createReqVO, MesWmMiscIssueDO.class);
        issue.setStatus(MesWmMiscIssueStatusEnum.PREPARE.getStatus());
        miscIssueMapper.insert(issue);
        return issue.getId();
    }

    @Override
    public void updateMiscIssue(MesWmMiscIssueSaveReqVO updateReqVO) {
        // 校验存在 + 草稿状态
        validateMiscIssueExistsAndDraft(updateReqVO.getId());
        // 校验编码唯一
        validateCodeUnique(updateReqVO.getId(), updateReqVO.getCode());

        // 更新
        MesWmMiscIssueDO updateObj = BeanUtils.toBean(updateReqVO, MesWmMiscIssueDO.class);
        miscIssueMapper.updateById(updateObj);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void deleteMiscIssue(Long id) {
        // 校验存在 + 草稿状态
        validateMiscIssueExistsAndDraft(id);

        // 级联删除行
        miscIssueLineService.deleteMiscIssueLineByIssueId(id);
        // 删除
        miscIssueMapper.deleteById(id);
    }

    @Override
    public MesWmMiscIssueDO getMiscIssue(Long id) {
        return miscIssueMapper.selectById(id);
    }

    @Override
    public PageResult<MesWmMiscIssueDO> getMiscIssuePage(MesWmMiscIssuePageReqVO pageReqVO) {
        return miscIssueMapper.selectPage(pageReqVO);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void submitMiscIssueApproval(Long id) {
        // 1. 校验存在 + 草稿状态
        validateMiscIssueExistsAndDraft(id);
        // 2. 校验至少有一条行
        List<MesWmMiscIssueLineDO> lines = miscIssueLineService.getMiscIssueLineListByIssueId(id);
        if (CollUtil.isEmpty(lines)) {
            throw exception(WM_MISC_ISSUE_NO_LINE);
        }
        // 3. 校验审批配置已启用且配置了有效审核人（未配置时抛出带明确提示的业务异常）
        approvalConfigApi.validateApprovalEnabledAndGetApprovers(MISC_ISSUE_APPROVE_BIZ_TYPE);
        // 4. 提交审批（草稿 → 审批中），并清空上一轮审核结果
        miscIssueMapper.submitAndResetAuditInfo(id, MesWmMiscIssueStatusEnum.APPROVING.getStatus());
        // 5. 创建 BPM 流程实例，使审批出现在「协同办公 - 我的流程」
        bpmProcessInstanceApi.createProcessInstance(getLoginUserId(),
                new BpmProcessInstanceCreateReqDTO()
                        .setProcessDefinitionKey(MISC_ISSUE_APPROVE_PROCESS_KEY)
                        .setBusinessKey(String.valueOf(id)));
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void updateMiscIssueAuditStatus(Long id, Integer bpmStatus, String reason) {
        // BPM 审批结果映射为单据状态：通过=待执行出库 / 不通过=草稿 / 取消=已取消
        Integer status;
        if (BpmTaskStatusEnum.APPROVE.getStatus().equals(bpmStatus)) {
            status = MesWmMiscIssueStatusEnum.APPROVED.getStatus();
        } else if (BpmTaskStatusEnum.REJECT.getStatus().equals(bpmStatus)) {
            status = MesWmMiscIssueStatusEnum.PREPARE.getStatus();
        } else if (BpmTaskStatusEnum.CANCEL.getStatus().equals(bpmStatus)) {
            status = MesWmMiscIssueStatusEnum.CANCELED.getStatus();
        } else {
            return;
        }
        if (miscIssueMapper.updateAuditStatusByBpm(id, status, reason) != 1) {
            log.warn("[updateMiscIssueAuditStatus] 杂项出库单({}) 不处于审批中状态，忽略 BPM 结果({})", id, bpmStatus);
        }
    }

    @Override
    public Set<Long> getMiscIssueApproverUserIds() {
        return approvalConfigApi.getApproverUserIds(MISC_ISSUE_APPROVE_BIZ_TYPE);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void auditMiscIssue(Long id, Boolean pass, String reviewRemark) {
        // 1. 校验存在
        MesWmMiscIssueDO issue = validateMiscIssueExists(id);
        // 2. 校验处于审批中状态
        if (!MesWmMiscIssueStatusEnum.APPROVING.getStatus().equals(issue.getStatus())) {
            throw exception(WM_MISC_ISSUE_NOT_APPROVING);
        }
        // 3. 校验当前登录用户是该业务类型的审核人（或签：任一人均可审核）
        Long userId = getLoginUserId();
        approvalConfigApi.validateApprover(MISC_ISSUE_APPROVE_BIZ_TYPE, userId);
        // 4. 审核不通过：必须填写原因，退回草稿可修改后重新提交
        if (!Boolean.TRUE.equals(pass)) {
            if (StrUtil.isBlank(reviewRemark)) {
                throw exception(WM_MISC_ISSUE_REJECT_REASON_REQUIRED);
            }
            miscIssueMapper.auditMiscIssue(id, MesWmMiscIssueStatusEnum.PREPARE.getStatus(),
                    userId, getUserNickname(userId), reviewRemark);
            return;
        }
        // 5. 审核通过：记录审核人与审核意见，状态置为待执行出库
        miscIssueMapper.auditMiscIssue(id, MesWmMiscIssueStatusEnum.APPROVED.getStatus(),
                userId, getUserNickname(userId), reviewRemark);
    }

    /**
     * 获取用户昵称
     *
     * @param userId 用户编号
     * @return 昵称，用户不存在时返回 null
     */
    private String getUserNickname(Long userId) {
        if (userId == null) {
            return null;
        }
        AdminUserRespDTO user = adminUserApi.getUser(userId);
        return user == null ? null : user.getNickname();
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void finishMiscIssue(Long id) {
        // 1.1 校验存在
        MesWmMiscIssueDO issue = validateMiscIssueExists(id);
        if (ObjUtil.notEqual(MesWmMiscIssueStatusEnum.APPROVED.getStatus(), issue.getStatus())) {
            throw exception(WM_MISC_ISSUE_STATUS_INVALID);
        }
        // 1.2 校验至少有一条行
        List<MesWmMiscIssueLineDO> lines = miscIssueLineService.getMiscIssueLineListByIssueId(id);
        if (CollUtil.isEmpty(lines)) {
            throw exception(WM_MISC_ISSUE_NO_LINE);
        }

        // 2. 遍历所有行，创建库存事务（扣减库存 + 记录流水）
        createTransactionList(issue);

        // 3. 更新出库单状态（待执行出库 → 已完成）
        miscIssueMapper.updateById(new MesWmMiscIssueDO()
                .setId(id).setStatus(MesWmMiscIssueStatusEnum.FINISHED.getStatus()));
    }

    private void createTransactionList(MesWmMiscIssueDO issue) {
        List<MesWmMiscIssueLineDO> lines = miscIssueLineService.getMiscIssueLineListByIssueId(issue.getId());
        wmTransactionService.createTransactionList(convertList(lines, line -> new MesWmTransactionSaveReqDTO()
                .setType(MesWmTransactionTypeEnum.OUT.getType()).setItemId(line.getItemId())
                .setQuantity(negateQuantity(line.getQuantity())) // 出库数量为负数
                .setBatchId(line.getBatchId()).setBatchCode(line.getBatchCode())
                .setWarehouseId(line.getWarehouseId()).setLocationId(line.getLocationId()).setAreaId(line.getAreaId())
                .setBizType(MesBizTypeConstants.WM_MISC_ISSUE).setBizId(issue.getId()).setBizCode(issue.getCode()).setBizLineId(line.getId())));
    }

    /**
     * 出库数量取负：数量为空时抛出明确的业务异常，避免 NPE
     */
    private BigDecimal negateQuantity(BigDecimal quantity) {
        if (quantity == null) {
            throw exception(WM_MISC_ISSUE_QUANTITY_INVALID);
        }
        return quantity.negate();
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void cancelMiscIssue(Long id) {
        // 校验存在
        MesWmMiscIssueDO issue = validateMiscIssueExists(id);
        // 已完成和已取消不允许取消
        if (ObjectUtils.equalsAny(issue.getStatus(),
                MesWmMiscIssueStatusEnum.FINISHED.getStatus(),
                MesWmMiscIssueStatusEnum.CANCELED.getStatus())) {
            throw exception(WM_MISC_ISSUE_CANCEL_NOT_ALLOWED);
        }
        // 取消
        miscIssueMapper.updateById(new MesWmMiscIssueDO()
                .setId(id).setStatus(MesWmMiscIssueStatusEnum.CANCELED.getStatus()));
    }

    @Override
    public MesWmMiscIssueDO validateMiscIssueEditable(Long id) {
        MesWmMiscIssueDO issue = validateMiscIssueExists(id);
        if (ObjUtil.notEqual(issue.getStatus(), MesWmMiscIssueStatusEnum.PREPARE.getStatus())) {
            throw exception(WM_MISC_ISSUE_STATUS_INVALID);
        }
        return issue;
    }

    private MesWmMiscIssueDO validateMiscIssueExists(Long id) {
        MesWmMiscIssueDO issue = miscIssueMapper.selectById(id);
        if (issue == null) {
            throw exception(WM_MISC_ISSUE_NOT_EXISTS);
        }
        return issue;
    }

    /**
     * 校验杂项出库单存在且为草稿状态
     */
    private MesWmMiscIssueDO validateMiscIssueExistsAndDraft(Long id) {
        MesWmMiscIssueDO issue = validateMiscIssueExists(id);
        if (ObjUtil.notEqual(MesWmMiscIssueStatusEnum.PREPARE.getStatus(), issue.getStatus())) {
            throw exception(WM_MISC_ISSUE_STATUS_INVALID);
        }
        return issue;
    }

    private void validateCodeUnique(Long id, String code) {
        MesWmMiscIssueDO issue = miscIssueMapper.selectByCode(code);
        if (issue == null) {
            return;
        }
        if (ObjUtil.notEqual(id, issue.getId())) {
            throw exception(WM_MISC_ISSUE_CODE_DUPLICATE);
        }
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public MesWmMiscIssueImportRespVO importMiscIssueList(List<MesWmMiscIssueImportExcelVO> importList, boolean updateSupport) {
        // 校验导入数据不能为空
        if (CollUtil.isEmpty(importList)) {
            throw exception(WM_MISC_ISSUE_IMPORT_LIST_IS_EMPTY);
        }
        MesWmMiscIssueImportRespVO respVO = MesWmMiscIssueImportRespVO.builder()
                .createCodes(new ArrayList<>()).updateCodes(new ArrayList<>())
                .failureCodes(new LinkedHashMap<>()).build();
        // 索引，用于错误提示
        AtomicInteger index = new AtomicInteger(1);
        importList.forEach(importItem -> {
            int currentIndex = index.getAndIncrement();
            String code = importItem.getCode();
            String key = StrUtil.blankToDefault(code, "第 " + currentIndex + " 行");
            // 校验编码必填
            if (StrUtil.isBlank(code)) {
                respVO.getFailureCodes().put(key, "单号不能为空");
                return;
            }
            // 校验名称必填
            if (StrUtil.isBlank(importItem.getName())) {
                respVO.getFailureCodes().put(key, "名称不能为空");
                return;
            }
            MesWmMiscIssueDO existing = miscIssueMapper.selectByCode(code);
            if (existing != null && updateSupport) {
                if (!MesWmMiscIssueStatusEnum.PREPARE.getStatus().equals(existing.getStatus())) {
                    respVO.getFailureCodes().put(key, "单据非草稿状态，不允许覆盖更新");
                    return;
                }
                MesWmMiscIssueDO updateObj = BeanUtils.toBean(importItem, MesWmMiscIssueDO.class);
                updateObj.setId(existing.getId());
                updateObj.setStatus(existing.getStatus());
                miscIssueMapper.updateById(updateObj);
                respVO.getUpdateCodes().add(code);
            } else if (existing != null) {
                respVO.getFailureCodes().put(key, "单号已存在：" + code);
            } else {
                MesWmMiscIssueDO createObj = BeanUtils.toBean(importItem, MesWmMiscIssueDO.class);
                createObj.setId(null);
                createObj.setStatus(MesWmMiscIssueStatusEnum.PREPARE.getStatus());
                miscIssueMapper.insert(createObj);
                respVO.getCreateCodes().add(code);
            }
        });
        return respVO;
    }

}