package cn.iocoder.yudao.module.mdm.service.agent;
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import cn.hutool.core.util.StrUtil;
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import cn.iocoder.yudao.module.mdm.controller.admin.agent.vo.MdmAgentImportPreflightReqVO;
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import cn.iocoder.yudao.module.mdm.controller.admin.agent.vo.MdmAgentImportPreflightRespVO;
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import cn.iocoder.yudao.module.mdm.controller.admin.item.vo.MdmItemImportExcelVO;
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import cn.iocoder.yudao.module.mdm.dal.dataobject.item.MdmItemDO;
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import cn.iocoder.yudao.module.mdm.service.item.MdmItemImportContext;
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import cn.iocoder.yudao.module.mdm.service.item.MdmItemRowResolution;
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import cn.iocoder.yudao.module.mdm.service.item.MdmItemService;
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import cn.iocoder.yudao.module.system.framework.agent.AgentBridgeException;
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import cn.iocoder.yudao.module.system.framework.agent.AgentPrincipal;
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import cn.iocoder.yudao.module.system.framework.agent.SystemAgentBridgeGuard;
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import cn.iocoder.yudao.module.system.service.storage.SystemAgentAttachmentRef;
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import cn.iocoder.yudao.module.system.service.storage.SystemAgentImportBridgeService;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import jakarta.annotation.Resource;
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import org.springframework.http.HttpStatus;
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import org.springframework.stereotype.Service;
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import org.springframework.validation.annotation.Validated;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import java.util.*;
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/**
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* 物料导入只读预检：校验附件、解析分类/单位、判断编码是否已存在，不写任何业务表。
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*/
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@Service
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@Validated
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public class MdmAgentImportPreflightService {
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private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();
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@Resource
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private SystemAgentImportBridgeService bridgeService;
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@Resource
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private MdmItemService itemService;
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@Resource
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private MdmAgentImportPolicy policy;
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public MdmAgentImportPreflightRespVO preflight(MdmAgentImportPreflightReqVO reqVO, AgentPrincipal principal) {
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if (reqVO.getRows().size() > policy.getMaxRows()) {
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throw new AgentBridgeException(HttpStatus.PAYLOAD_TOO_LARGE, "ROW_LIMIT_EXCEEDED",
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"导入行数超过上限：" + policy.getMaxRows());
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}
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// 1. 附件与摘要必须与本次会话绑定的一致
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SystemAgentAttachmentRef attachment = bridgeService.requireOwnedAttachmentRef(reqVO.getAttachmentId());
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if (reqVO.getSessionId() != null && !reqVO.getSessionId().equals(attachment.sessionId())) {
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throw new AgentBridgeException(HttpStatus.CONFLICT, "SESSION_MISMATCH",
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"附件不属于指定补录会话，请重新上传后再试", true, null);
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}
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String sourceSha256 = bridgeService.sha256OfAttachment(reqVO.getAttachmentId());
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if (!sourceSha256.equalsIgnoreCase(reqVO.getSourceSha256().trim())) {
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throw new AgentBridgeException(HttpStatus.CONFLICT, "SOURCE_DIGEST_MISMATCH",
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"附件内容已变化（摘要不一致），请重新上传后再试", true, null);
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}
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// 2. candidate_id 必须唯一，否则回执无法逐行对应
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Set<String> candidateIds = new HashSet<>();
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for (MdmAgentImportPreflightReqVO.Row row : reqVO.getRows()) {
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if (!candidateIds.add(row.getCandidateId())) {
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throw new AgentBridgeException(HttpStatus.BAD_REQUEST, "CANDIDATE_ID_DUPLICATED",
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"导入行标识重复：" + row.getCandidateId());
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}
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}
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// 3. 预热分类/单位映射
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List<MdmItemImportExcelVO> excelRows = reqVO.getRows().stream()
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.map(MdmAgentImportPreflightService::toExcelVO).toList();
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MdmItemImportContext context = itemService.buildImportContext(excelRows);
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boolean syncMesRequested = Boolean.TRUE.equals(reqVO.getSyncMes());
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List<MdmAgentImportPreflightRespVO.Issue> blockingItems = new ArrayList<>();
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if (syncMesRequested) {
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blockingItems.add(issue("MES_SYNC_DISABLED", "syncMes",
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"本阶段不开放同步 MES，请关闭 syncMes 后重试", false));
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}
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// 4. 文件内重复编码：所有重复行一起阻断，避免“首行建、次行跳”的误导
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Map<String, Long> codeCounts = reqVO.getRows().stream()
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.map(MdmAgentImportPreflightReqVO.Row::getCode).filter(StrUtil::isNotBlank)
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.map(String::trim).collect(java.util.stream.Collectors.groupingBy(code -> code,
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java.util.stream.Collectors.counting()));
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Set<String> duplicateCodes = codeCounts.entrySet().stream()
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.filter(entry -> entry.getValue() > 1).map(Map.Entry::getKey)
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.collect(java.util.stream.Collectors.toSet());
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// 5. 逐行判定 CREATE / SKIP / BLOCKED
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List<MdmAgentImportPreflightRespVO.Row> rows = new ArrayList<>();
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int createCount = 0;
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int skipCount = 0;
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int blockedCount = 0;
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for (int index = 0; index < reqVO.getRows().size(); index++) {
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MdmAgentImportPreflightReqVO.Row row = reqVO.getRows().get(index);
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MdmItemImportExcelVO excelVO = excelRows.get(index);
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List<MdmAgentImportPreflightRespVO.Issue> blockers = new ArrayList<>();
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List<MdmAgentImportPreflightRespVO.Issue> warnings = new ArrayList<>();
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if (StrUtil.isBlank(row.getCode())) {
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blockers.add(issue("ROW_CODE_REQUIRED", "code", "物料编码不能为空", false));
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} else if (duplicateCodes.contains(row.getCode().trim())) {
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blockers.add(issue("DUPLICATE_CODE_IN_FILE", "code",
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"文件内物料编码重复：" + row.getCode().trim(), false));
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}
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if (StrUtil.isBlank(row.getName())) {
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blockers.add(issue("ROW_NAME_REQUIRED", "name", "物料名称不能为空", false));
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}
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if (StrUtil.isNotBlank(row.getCategoryCode())
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&& !context.categoryCodeIdMap().containsKey(row.getCategoryCode())) {
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blockers.add(issue("CATEGORY_NOT_FOUND", "categoryCode",
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"物料分类编码不存在：" + row.getCategoryCode(), false));
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}
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if (StrUtil.isNotBlank(row.getUnitMeasureCode())
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&& !context.unitCodeIdMap().containsKey(row.getUnitMeasureCode())) {
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blockers.add(issue("UNIT_NOT_FOUND", "unitMeasureCode",
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"计量单位编码不存在：" + row.getUnitMeasureCode(), false));
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}
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MdmItemRowResolution resolution = itemService.resolveImportRow(excelVO, context);
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if (!resolution.isSuccess() && blockers.isEmpty()) {
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// 理论上上面的逐项校验已覆盖；兜底保持与 Excel 导入一致的文案
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blockers.add(issue("ROW_INVALID", null, resolution.failureMessage(), false));
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}
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String action;
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Long targetItemId = null;
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if (!blockers.isEmpty()) {
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action = "BLOCKED";
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blockedCount++;
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} else {
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List<MdmItemDO> existing = itemService.getItemListByCode(row.getCode().trim());
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if (!existing.isEmpty()) {
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action = "SKIP";
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targetItemId = existing.get(0).getId();
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skipCount++;
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warnings.add(issue("ITEM_CODE_EXISTS", "code", "物料编码已存在，本阶段只新建不更新，将跳过该行", false));
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} else {
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action = "CREATE";
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createCount++;
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}
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}
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rows.add(MdmAgentImportPreflightRespVO.Row.builder()
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.candidateId(row.getCandidateId())
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.rowNo(row.getRowNo())
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.code(row.getCode())
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.name(row.getName())
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.action(action)
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.resolved(resolve(row, context))
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.blockers(blockers)
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.warnings(warnings)
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.targetItemId(targetItemId)
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.build());
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}
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boolean canCommit = blockingItems.isEmpty() && blockedCount == 0;
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String preflightHash = buildPreflightHash(reqVO, principal, attachment, sourceSha256,
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syncMesRequested, rows);
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return MdmAgentImportPreflightRespVO.builder()
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.preflightHash(preflightHash)
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.source(MdmAgentImportPreflightRespVO.Source.builder()
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.attachmentId(attachment.attachmentId())
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.sessionId(attachment.sessionId())
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.sourceSha256(sourceSha256)
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.proposalRevision(reqVO.getProposalRevision())
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.build())
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.authorization(MdmAgentImportPreflightRespVO.Authorization.builder()
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.userId(principal.userId())
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.tenantId(principal.tenantId())
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.permission(SystemAgentBridgeGuard.PERMISSION_ITEM_IMPORT)
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.policyRevision(MdmAgentImportPolicy.POLICY_REVISION)
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.build())
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.policy(MdmAgentImportPreflightRespVO.Policy.builder()
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.updateAllowed(false)
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.mesSyncAllowed(policy.isAllowMesSync())
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.maxRows(policy.getMaxRows())
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.build())
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.summary(MdmAgentImportPreflightRespVO.Summary.builder()
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.total(rows.size())
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.create(createCount)
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.skip(skipCount)
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.blocked(blockedCount)
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.build())
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.canCommit(canCommit)
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.sideEffects(canCommit ? List.of("mdm_item.create:" + createCount) : List.of())
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.rows(rows)
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.blockingItems(blockingItems)
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.build();
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}
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private static MdmItemImportExcelVO toExcelVO(MdmAgentImportPreflightReqVO.Row row) {
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return MdmItemImportExcelVO.builder()
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.code(row.getCode())
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.name(row.getName())
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.specification(row.getSpecification())
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.categoryCode(row.getCategoryCode())
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.unitMeasureCode(row.getUnitMeasureCode())
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.build();
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}
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private static MdmAgentImportPreflightRespVO.Resolved resolve(MdmAgentImportPreflightReqVO.Row row,
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MdmItemImportContext context) {
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Long categoryId = StrUtil.isBlank(row.getCategoryCode()) ? null
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: context.categoryCodeIdMap().get(row.getCategoryCode());
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String categoryName = StrUtil.isBlank(row.getCategoryCode()) ? null
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: context.categoryCodeNameMap().get(row.getCategoryCode());
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Long unitMeasureId = StrUtil.isBlank(row.getUnitMeasureCode()) ? null
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: context.unitCodeIdMap().get(row.getUnitMeasureCode());
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String unitMeasureName = StrUtil.isBlank(row.getUnitMeasureCode()) ? null
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: context.unitCodeNameMap().get(row.getUnitMeasureCode());
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return MdmAgentImportPreflightRespVO.Resolved.builder()
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.categoryId(categoryId).categoryName(categoryName)
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.unitMeasureId(unitMeasureId).unitMeasureName(unitMeasureName)
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.build();
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}
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private static MdmAgentImportPreflightRespVO.Issue issue(String code, String field, String message,
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boolean retryable) {
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return MdmAgentImportPreflightRespVO.Issue.builder()
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.code(code).field(field).message(message).retryable(retryable).build();
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}
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/**
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* 按固定字段顺序拼装规范 JSON 后取 SHA-256：同一份计划必须得到同一个 hash。
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*/
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private static String buildPreflightHash(MdmAgentImportPreflightReqVO reqVO, AgentPrincipal principal,
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SystemAgentAttachmentRef attachment, String sourceSha256,
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boolean syncMesRequested, List<MdmAgentImportPreflightRespVO.Row> rows) {
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Map<String, Object> canonical = new LinkedHashMap<>();
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canonical.put("policy_revision", MdmAgentImportPolicy.POLICY_REVISION);
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canonical.put("user_id", principal.userId());
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canonical.put("tenant_id", principal.tenantId());
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canonical.put("attachment_id", attachment.attachmentId());
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canonical.put("session_id", attachment.sessionId());
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canonical.put("source_sha256", sourceSha256.toLowerCase(Locale.ROOT));
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canonical.put("proposal_revision", StrUtil.blankToDefault(reqVO.getProposalRevision(), ""));
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canonical.put("sync_mes", syncMesRequested);
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List<Map<String, Object>> canonicalRows = new ArrayList<>();
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for (MdmAgentImportPreflightRespVO.Row row : rows) {
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Map<String, Object> item = new LinkedHashMap<>();
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item.put("candidate_id", row.getCandidateId());
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item.put("row_no", row.getRowNo());
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item.put("code", row.getCode());
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item.put("name", row.getName());
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canonicalRows.add(item);
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}
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canonical.put("rows", canonicalRows);
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try {
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byte[] payload = OBJECT_MAPPER.writeValueAsBytes(canonical);
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return HexFormat.of().formatHex(MessageDigest.getInstance("SHA-256").digest(payload));
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} catch (NoSuchAlgorithmException ex) {
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throw new IllegalStateException("SHA-256 不可用", ex);
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} catch (com.fasterxml.jackson.core.JsonProcessingException ex) {
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throw new IllegalStateException("预检摘要生成失败", ex);
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}
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}
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}
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