import { api } from './api';
import type { Bug, BugSeverity, BugStatus } from './bug';
import type { DevTask, DevTaskStatus, Reference } from './dev-task';
import type { Priority } from './derive';
import type { Requirement, RequirementStatus, SourceType } from './requirement';
import type { TestCase, TestCaseStatus } from './test-case';
import type { VersionPlan, VersionPlanLog, VersionPlanRequirementCoverage } from './version-plan';
import type { WorkActivity, WorkActivityCategory, WorkActivitySourceType } from './work-activity';

export interface RootProject {
  id: string;
  name: string;
  description: string;
  createdAt: string;
}

export interface RootVersion {
  id: string;
  productId?: string;
  projectId?: string | null;
  name: string;
  status?: string;
  releaseDate: string | null;
  createdAt: string;
  currentStage?: string | null;
  startDate?: string | null;
  expectedReleaseDate?: string | null;
  members?: unknown[];
  progress?: unknown[];
  priority?: string;
  links?: unknown;
}

export interface RootProduct {
  id: string;
  name: string;
  description: string;
  createdAt: string;
  updatedAt: string;
  projects: RootProject[];
  versions: RootVersion[];
  _count?: { requirements: number; projects: number; versions?: number };
}

export async function createProductRoot(data: { name: string; description?: string }): Promise<RootProduct> {
  const product = await api.post<Omit<RootProduct, 'projects' | 'versions'>>('/products', data);
  return normalizeProductRoot({ ...product, projects: [], versions: [] });
}

export async function updateProductRoot(
  productId: string,
  data: { name?: string; description?: string },
): Promise<Partial<RootProduct>> {
  return api.patch<Partial<RootProduct>>(`/products/${productId}`, data);
}

export async function deleteProductRoot(productId: string): Promise<void> {
  await api.delete(`/products/${productId}`);
}

export async function createProjectByProductId(
  productId: string,
  data: { name: string; description?: string },
): Promise<RootProject> {
  return api.post<RootProject>(`/products/${productId}/projects`, data);
}

export async function updateProjectByProductId(
  productId: string,
  projectId: string,
  data: { name?: string; description?: string },
): Promise<RootProject> {
  return api.patch<RootProject>(`/products/${productId}/projects/${projectId}`, data);
}

export async function deleteProjectByProductId(productId: string, projectId: string): Promise<void> {
  await api.delete(`/products/${productId}/projects/${projectId}`);
}

export async function createVersionByProductId(
  productId: string,
  data: { name: string; status?: string; projectId?: string },
): Promise<RootVersion> {
  return normalizeVersionRoot(await api.post<RootVersion>(`/products/${productId}/versions`, data));
}

export async function updateVersionByProductId(
  productId: string,
  versionId: string,
  data: Record<string, unknown>,
): Promise<RootVersion> {
  return normalizeVersionRoot(await api.patch<RootVersion>(`/products/${productId}/versions/${versionId}`, data));
}

export async function deleteVersionByProductId(productId: string, versionId: string): Promise<void> {
  await api.delete(`/products/${productId}/versions/${versionId}`);
}

interface DomainRequirementRow {
  id: string;
  productId: string;
  projectId?: string | null;
  versionId?: string | null;
  code: string;
  title: string;
  description?: string | null;
  status?: string | null;
  priority?: string | number | null;
  type?: string | null;
  sourceType?: string | null;
  sourceTarget?: string | null;
  platform?: string | null;
  creatorId?: string | null;
  creatorName?: string | null;
  creator?: { id?: string | null; name?: string | null } | null;
  createdAt?: string | Date | null;
}

export async function createRequirementByProductId(
  productId: string,
  data: Partial<Requirement>,
): Promise<Requirement> {
  return normalizeRequirement(await api.post<DomainRequirementRow>(
    `/products/${productId}/requirements`,
    toRequirementPayload(data),
  ));
}

export async function updateRequirementByProductId(
  productId: string,
  requirementId: string,
  data: Partial<Requirement>,
): Promise<Requirement> {
  return normalizeRequirement(await api.patch<DomainRequirementRow>(
    `/products/${productId}/requirements/${requirementId}`,
    toRequirementPayload(data),
  ));
}

export async function updateRequirementStatusByProductId(
  productId: string,
  requirementId: string,
  status: RequirementStatus,
): Promise<Requirement> {
  return normalizeRequirement(await api.patch<DomainRequirementRow>(
    `/products/${productId}/requirements/${requirementId}/status`,
    { status },
  ));
}

export async function deleteRequirementByProductId(productId: string, requirementId: string): Promise<void> {
  await api.delete(`/products/${productId}/requirements/${requirementId}`);
}

interface DomainVersionPlanRow {
  id: string;
  versionId: string;
  type: string;
  title: string;
  status?: string | null;
  ownerId?: string | null;
  expectedStartAt?: string | Date | null;
  expectedEndAt?: string | Date | null;
  actualStartAt?: string | Date | null;
  completedAt?: string | Date | null;
  resultUrl?: string | null;
  requirementCoverage?: unknown;
  logs?: unknown;
  createdAt?: string | Date | null;
}

interface DomainDevTaskRow {
  id: string;
  versionId: string;
  requirementId?: string | null;
  categoryId?: string | null;
  code: string;
  title: string;
  description?: string | null;
  status?: string | null;
  priority?: string | number | null;
  assigneeId?: string | null;
  creatorId?: string | null;
  isBlocked?: boolean | null;
  blockReason?: string | null;
  expectedStartAt?: string | Date | null;
  expectedEndAt?: string | Date | null;
  startDate?: string | Date | null;
  completedAt?: string | Date | null;
  estimateHours?: number | null;
  aiEstimateHours?: number | null;
  references?: unknown;
  aiDraft?: boolean | null;
  aiDraftAt?: string | Date | null;
  createdAt?: string | Date | null;
  updatedAt?: string | Date | null;
}

interface DomainTestCaseRow {
  id: string;
  versionId: string;
  requirementId?: string | null;
  categoryId?: string | null;
  code: string;
  title: string;
  description?: string | null;
  status?: string | null;
  roundNo?: number | null;
  priority?: string | number | null;
  assigneeId?: string | null;
  creatorId?: string | null;
  plannedTestAt?: string | Date | null;
  plannedEndAt?: string | Date | null;
  startedAt?: string | Date | null;
  completedAt?: string | Date | null;
  estimateHours?: number | null;
  aiEstimateHours?: number | null;
  references?: unknown;
  aiDraft?: boolean | null;
  aiDraftAt?: string | Date | null;
  createdAt?: string | Date | null;
  updatedAt?: string | Date | null;
}

interface DomainBugRow {
  id: string;
  versionId: string;
  testCaseId?: string | null;
  code: string;
  title: string;
  description?: string | null;
  status?: string | null;
  severity?: string | null;
  priority?: string | number | null;
  assigneeId?: string | null;
  reporterId?: string | null;
  plannedFixAt?: string | Date | null;
  resolvedAt?: string | Date | null;
  closedAt?: string | Date | null;
  resolution?: string | null;
  createdAt?: string | Date | null;
  updatedAt?: string | Date | null;
}

interface DomainWorkActivityRow {
  id: string;
  actorId?: string | null;
  actorName?: string | null;
  sourceType: string;
  sourceId: string;
  action: string;
  title: string;
  metadata?: unknown;
  occurredAt?: string | Date | null;
}

interface DomainMutationResponse<T> {
  item: T;
  activities?: DomainWorkActivityRow[];
}

interface DomainBatchMutationResponse<T> {
  items: T[];
  activities?: DomainWorkActivityRow[];
}

export async function listVersionPlansByVersionId(versionId: string): Promise<VersionPlan[]> {
  const rows = await api.get<DomainVersionPlanRow[]>(`/versions/${versionId}/plans`);
  return rows.map(normalizeVersionPlan);
}

export async function createVersionPlanByVersionId(
  versionId: string,
  data: Partial<VersionPlan>,
) {
  return normalizeMutation(
    await api.post<DomainMutationResponse<DomainVersionPlanRow>>(`/versions/${versionId}/plans`, toVersionPlanPayload(data)),
    normalizeVersionPlan,
  );
}

export async function updateVersionPlanByVersionId(
  versionId: string,
  planId: string,
  data: Partial<VersionPlan>,
) {
  return normalizeMutation(
    await api.patch<DomainMutationResponse<DomainVersionPlanRow>>(`/versions/${versionId}/plans/${planId}`, toVersionPlanPayload(data)),
    normalizeVersionPlan,
  );
}

export async function completeVersionPlanByVersionId(
  versionId: string,
  planId: string,
  data: Partial<VersionPlan>,
) {
  return normalizeMutation(
    await api.patch<DomainMutationResponse<DomainVersionPlanRow>>(`/versions/${versionId}/plans/${planId}/complete`, toVersionPlanPayload(data)),
    normalizeVersionPlan,
  );
}

export async function deleteVersionPlanByVersionId(versionId: string, planId: string): Promise<void> {
  await api.delete(`/versions/${versionId}/plans/${planId}`);
}

export async function listDevTasksByVersionId(versionId: string): Promise<DevTask[]> {
  const rows = await api.get<DomainDevTaskRow[]>(`/versions/${versionId}/dev-tasks`);
  return rows.map(normalizeDevTask);
}

export async function createDevTaskByVersionId(versionId: string, data: Partial<DevTask>) {
  return normalizeMutation(
    await api.post<DomainMutationResponse<DomainDevTaskRow>>(`/versions/${versionId}/dev-tasks`, toDevTaskPayload(data)),
    normalizeDevTask,
  );
}

export async function updateDevTaskByVersionId(versionId: string, taskId: string, data: Partial<DevTask>) {
  return normalizeMutation(
    await api.patch<DomainMutationResponse<DomainDevTaskRow>>(`/versions/${versionId}/dev-tasks/${taskId}`, toDevTaskPayload(data)),
    normalizeDevTask,
  );
}

export async function updateDevTaskStatusByVersionId(versionId: string, taskId: string, status: DevTaskStatus) {
  return normalizeMutation(
    await api.patch<DomainMutationResponse<DomainDevTaskRow>>(`/versions/${versionId}/dev-tasks/${taskId}/status`, { status }),
    normalizeDevTask,
  );
}

export async function setDevTaskBlockedByVersionId(
  versionId: string,
  taskId: string,
  blocked: boolean,
  reason?: string,
) {
  return normalizeMutation(
    await api.patch<DomainMutationResponse<DomainDevTaskRow>>(`/versions/${versionId}/dev-tasks/${taskId}/block`, { blocked, reason }),
    normalizeDevTask,
  );
}

export async function transferDevTaskByVersionId(versionId: string, taskId: string, assigneeId: string) {
  return normalizeMutation(
    await api.patch<DomainMutationResponse<DomainDevTaskRow>>(`/versions/${versionId}/dev-tasks/${taskId}/transfer`, { assigneeId }),
    normalizeDevTask,
  );
}

export async function deleteDevTaskByVersionId(versionId: string, taskId: string): Promise<void> {
  await api.delete(`/versions/${versionId}/dev-tasks/${taskId}`);
}

export async function listTestCasesByVersionId(versionId: string): Promise<TestCase[]> {
  const rows = await api.get<DomainTestCaseRow[]>(`/versions/${versionId}/test-cases`);
  return rows.map(normalizeTestCase);
}

export async function createTestCaseByVersionId(versionId: string, data: Partial<TestCase>) {
  return normalizeMutation(
    await api.post<DomainMutationResponse<DomainTestCaseRow>>(`/versions/${versionId}/test-cases`, toTestCasePayload(data)),
    normalizeTestCase,
  );
}

export async function createTestCasesByVersionId(versionId: string, items: Partial<TestCase>[]) {
  return normalizeBatchMutation(
    await api.post<DomainBatchMutationResponse<DomainTestCaseRow>>(
      `/versions/${versionId}/test-cases/batch`,
      { items: items.map(toTestCasePayload) },
    ),
    normalizeTestCase,
  );
}

export async function updateTestCaseByVersionId(versionId: string, testCaseId: string, data: Partial<TestCase>) {
  return normalizeMutation(
    await api.patch<DomainMutationResponse<DomainTestCaseRow>>(`/versions/${versionId}/test-cases/${testCaseId}`, toTestCasePayload(data)),
    normalizeTestCase,
  );
}

export async function updateTestCaseStatusByVersionId(versionId: string, testCaseId: string, status: TestCaseStatus) {
  return normalizeMutation(
    await api.patch<DomainMutationResponse<DomainTestCaseRow>>(`/versions/${versionId}/test-cases/${testCaseId}/status`, { status }),
    normalizeTestCase,
  );
}

export async function deleteTestCaseByVersionId(versionId: string, testCaseId: string): Promise<void> {
  await api.delete(`/versions/${versionId}/test-cases/${testCaseId}`);
}

export async function listBugsByVersionId(versionId: string): Promise<Bug[]> {
  const rows = await api.get<DomainBugRow[]>(`/versions/${versionId}/bugs`);
  return rows.map(normalizeBug);
}

export async function createBugByVersionId(versionId: string, data: Partial<Bug>) {
  return normalizeMutation(
    await api.post<DomainMutationResponse<DomainBugRow>>(`/versions/${versionId}/bugs`, toBugPayload(data)),
    normalizeBug,
  );
}

export async function updateBugByVersionId(versionId: string, bugId: string, data: Partial<Bug>) {
  return normalizeMutation(
    await api.patch<DomainMutationResponse<DomainBugRow>>(`/versions/${versionId}/bugs/${bugId}`, toBugPayload(data)),
    normalizeBug,
  );
}

export async function updateBugStatusByVersionId(
  versionId: string,
  bugId: string,
  status: BugStatus,
  options: { operator?: string; resolution?: string } = {},
) {
  return normalizeMutation(
    await api.patch<DomainMutationResponse<DomainBugRow>>(`/versions/${versionId}/bugs/${bugId}/status`, { status, ...options }),
    normalizeBug,
  );
}

export async function transferBugByVersionId(versionId: string, bugId: string, assigneeId: string, operator?: string) {
  return normalizeMutation(
    await api.patch<DomainMutationResponse<DomainBugRow>>(`/versions/${versionId}/bugs/${bugId}/transfer`, { assigneeId, operator }),
    normalizeBug,
  );
}

export async function deleteBugByVersionId(versionId: string, bugId: string): Promise<void> {
  await api.delete(`/versions/${versionId}/bugs/${bugId}`);
}

function normalizeProductRoot(product: RootProduct): RootProduct {
  return {
    ...product,
    projects: product.projects ?? [],
    versions: (product.versions ?? []).map(normalizeVersionRoot),
    _count: product._count ?? { requirements: 0, projects: product.projects?.length ?? 0, versions: product.versions?.length ?? 0 },
  };
}

function normalizeVersionRoot(version: RootVersion): RootVersion {
  return {
    ...version,
    status: version.status ?? 'planned',
    releaseDate: version.releaseDate ?? null,
    members: Array.isArray(version.members) ? version.members : [],
    progress: Array.isArray(version.progress) ? version.progress : [],
    links: version.links && typeof version.links === 'object' ? version.links : {},
  };
}

function toRequirementPayload(data: Partial<Requirement>) {
  return {
    ...(data.code !== undefined && { code: data.code }),
    ...(data.title !== undefined && { title: data.title }),
    ...(data.description !== undefined && { description: data.description }),
    ...(data.projectId !== undefined && { projectId: data.projectId }),
    ...(data.versionId !== undefined && { versionId: data.versionId ?? null }),
    ...(data.typeId !== undefined && { type: data.typeId }),
    ...(data.sourceType !== undefined && { sourceType: data.sourceType }),
    ...(data.sourceTarget !== undefined && { sourceTarget: data.sourceTarget }),
    ...(data.platforms !== undefined && { platform: data.platforms.join(',') }),
    ...(data.priority !== undefined && { priority: priorityToNumber(data.priority) }),
  };
}

function normalizeRequirement(row: DomainRequirementRow): Requirement {
  return {
    id: row.id,
    code: row.code,
    title: row.title,
    description: row.description ?? '',
    productId: row.productId,
    projectId: row.projectId ?? '',
    versionId: row.versionId ?? undefined,
    sourceType: toSourceType(row.sourceType),
    sourceTarget: row.sourceTarget ?? '',
    platforms: splitCsv(row.platform),
    typeId: row.type ?? '',
    status: toRequirementStatus(row.status),
    priority: toPriority(row.priority),
    effort: 'M',
    creator: row.creator?.name ?? row.creatorName ?? row.creatorId ?? '',
    createdAt: isoString(row.createdAt),
  };
}

function toSourceType(value: string | null | undefined): SourceType {
  const allowed = new Set<SourceType>(['customer', 'internal', 'operation', 'aftersale', 'market', 'competitor', 'management']);
  return allowed.has(value as SourceType) ? value as SourceType : 'internal';
}

function toRequirementStatus(value: string | null | undefined): RequirementStatus {
  const allowed = new Set<RequirementStatus>(['pending_review', 'adopted', 'rejected', 'planned', 'developing', 'testing', 'released', 'closed']);
  return allowed.has(value as RequirementStatus) ? value as RequirementStatus : 'pending_review';
}

function toPriority(value: string | number | null | undefined): Priority {
  if (typeof value === 'string' && /^P[0-4]$/.test(value)) return value as Priority;
  const parsed = Number(value ?? 2);
  const normalized = Number.isFinite(parsed) ? Math.max(0, Math.min(4, Math.floor(parsed))) : 2;
  return `P${normalized}` as Priority;
}

function priorityToNumber(value: Priority | undefined): number | undefined {
  if (!value) return undefined;
  const match = /^P([0-4])$/.exec(value);
  return match ? Number(match[1]) : undefined;
}

function splitCsv(value: string | null | undefined): string[] {
  if (!value) return [];
  return value.split(',').map((item) => item.trim()).filter(Boolean);
}

function isoString(value: string | Date | null | undefined): string {
  if (!value) return new Date().toISOString();
  if (value instanceof Date) return value.toISOString();
  const time = new Date(value).getTime();
  return Number.isFinite(time) ? new Date(time).toISOString() : new Date().toISOString();
}

function optionalIso(value: string | Date | null | undefined): string | undefined {
  if (!value) return undefined;
  return isoString(value);
}

function toVersionPlanPayload(data: Partial<VersionPlan>) {
  return {
    ...(data.type !== undefined && { type: data.type }),
    ...(data.title !== undefined && { title: data.title }),
    ...(data.status !== undefined && { status: data.status }),
    ...(data.owner !== undefined && { owner: data.owner }),
    ...(data.startTime !== undefined && { startTime: data.startTime }),
    ...(data.endTime !== undefined && { endTime: data.endTime }),
    ...(data.actualStartAt !== undefined && { actualStartAt: data.actualStartAt }),
    ...(data.completedAt !== undefined && { completedAt: data.completedAt }),
    ...(data.resultUrl !== undefined && { resultUrl: data.resultUrl }),
    ...(data.linkedRequirementIds !== undefined && { linkedRequirementIds: data.linkedRequirementIds }),
    ...(data.requirementCoverage !== undefined && { requirementCoverage: data.requirementCoverage }),
    ...(data.logs !== undefined && { logs: data.logs }),
  };
}

function normalizeVersionPlan(row: DomainVersionPlanRow): VersionPlan {
  const requirementCoverage = asArray<VersionPlanRequirementCoverage>(row.requirementCoverage);
  return {
    id: row.id,
    versionId: row.versionId,
    type: toPlanType(row.type),
    title: row.title,
    owner: row.ownerId ?? '',
    startTime: isoString(row.expectedStartAt),
    endTime: isoString(row.expectedEndAt),
    status: toPlanStatus(row.status),
    tasks: [],
    completedRequirementIds: requirementCoverage
      .filter((item) => item?.status === 'completed')
      .map((item) => item.requirementId)
      .filter(Boolean),
    linkedRequirementIds: requirementCoverage.map((item) => item?.requirementId).filter(Boolean),
    requirementCoverage,
    logs: asArray<VersionPlanLog>(row.logs),
    resultUrl: row.resultUrl ?? undefined,
    actualStartAt: optionalIso(row.actualStartAt),
    createdAt: isoString(row.createdAt),
    completedAt: optionalIso(row.completedAt),
    addedBy: row.ownerId ?? '',
  };
}

function toPlanType(value: string): VersionPlan['type'] {
  return value === 'research' || value === 'ui' ? value : 'product';
}

function toPlanStatus(value: string | null | undefined): VersionPlan['status'] {
  return value === 'in_progress' || value === 'completed' ? value : 'pending';
}

function toDevTaskPayload(data: Partial<DevTask>) {
  return {
    ...(data.versionId !== undefined && { versionId: data.versionId }),
    ...(data.requirementId !== undefined && { requirementId: data.requirementId }),
    ...(data.categoryId !== undefined && { categoryId: data.categoryId }),
    ...(data.taskNo !== undefined && { taskNo: data.taskNo }),
    ...(data.title !== undefined && { title: data.title }),
    ...(data.description !== undefined && { description: data.description }),
    ...(data.status !== undefined && { status: data.status }),
    ...(data.priority !== undefined && { priority: priorityToNumber(data.priority) }),
    ...(data.assigneeId !== undefined && { assigneeId: data.assigneeId }),
    ...(data.createdBy !== undefined && { createdBy: data.createdBy }),
    ...(data.isBlocked !== undefined && { isBlocked: data.isBlocked }),
    ...(data.blockReason !== undefined && { blockReason: data.blockReason }),
    ...(data.expectedStartAt !== undefined && { expectedStartAt: data.expectedStartAt }),
    ...(data.expectedEndAt !== undefined && { expectedEndAt: data.expectedEndAt }),
    ...(data.actualStartAt !== undefined && { actualStartAt: data.actualStartAt }),
    ...(data.actualEndAt !== undefined && { actualEndAt: data.actualEndAt }),
    ...(data.estimateHours !== undefined && { estimateHours: data.estimateHours }),
    ...(data.aiEstimateHours !== undefined && { aiEstimateHours: data.aiEstimateHours }),
    ...(data.references !== undefined && { references: data.references }),
    ...(data.aiDraft !== undefined && { aiDraft: data.aiDraft }),
    ...(data.aiDraftAt !== undefined && { aiDraftAt: data.aiDraftAt }),
  };
}

function normalizeDevTask(row: DomainDevTaskRow): DevTask {
  return {
    id: row.id,
    taskNo: row.code,
    versionId: row.versionId,
    requirementId: row.requirementId ?? '',
    title: row.title,
    description: row.description ?? '',
    categoryId: row.categoryId ?? '',
    assigneeId: row.assigneeId ?? '',
    priority: toPriority(row.priority),
    expectedStartAt: isoString(row.expectedStartAt),
    expectedEndAt: isoString(row.expectedEndAt),
    estimateHours: row.estimateHours ?? undefined,
    aiEstimateHours: row.aiEstimateHours ?? undefined,
    actualStartAt: optionalIso(row.startDate),
    actualEndAt: optionalIso(row.completedAt),
    status: toDevTaskStatus(row.status),
    isBlocked: Boolean(row.isBlocked),
    blockReason: row.blockReason ?? undefined,
    references: asArray<Reference>(row.references),
    aiDraft: Boolean(row.aiDraft),
    aiDraftAt: optionalIso(row.aiDraftAt),
    createdBy: row.creatorId ?? '',
    createdAt: isoString(row.createdAt),
    updatedAt: isoString(row.updatedAt),
  };
}

function toDevTaskStatus(value: string | null | undefined): DevTaskStatus {
  return value === 'in_progress' || value === 'testing' || value === 'submitted' ? value : 'todo';
}

function toTestCasePayload(data: Partial<TestCase>) {
  return {
    ...(data.versionId !== undefined && { versionId: data.versionId }),
    ...(data.requirementId !== undefined && { requirementId: data.requirementId }),
    ...(data.categoryId !== undefined && { categoryId: data.categoryId }),
    ...(data.caseNo !== undefined && { caseNo: data.caseNo }),
    ...(data.title !== undefined && { title: data.title }),
    ...(data.description !== undefined && { description: data.description }),
    ...(data.status !== undefined && { status: data.status }),
    ...(data.roundNo !== undefined && { roundNo: data.roundNo }),
    ...(data.priority !== undefined && { priority: priorityToNumber(data.priority) }),
    ...(data.assigneeId !== undefined && { assigneeId: data.assigneeId }),
    ...(data.createdBy !== undefined && { createdBy: data.createdBy }),
    ...(data.plannedTestAt !== undefined && { plannedTestAt: data.plannedTestAt }),
    ...(data.plannedEndAt !== undefined && { plannedEndAt: data.plannedEndAt }),
    ...(data.startedAt !== undefined && { startedAt: data.startedAt }),
    ...(data.completedAt !== undefined && { completedAt: data.completedAt }),
    ...(data.estimateHours !== undefined && { estimateHours: data.estimateHours }),
    ...(data.aiEstimateHours !== undefined && { aiEstimateHours: data.aiEstimateHours }),
    ...(data.references !== undefined && { references: data.references }),
    ...(data.aiDraft !== undefined && { aiDraft: data.aiDraft }),
    ...(data.aiDraftAt !== undefined && { aiDraftAt: data.aiDraftAt }),
  };
}

function normalizeTestCase(row: DomainTestCaseRow): TestCase {
  return {
    id: row.id,
    caseNo: row.code,
    versionId: row.versionId,
    requirementId: row.requirementId ?? undefined,
    roundNo: row.roundNo && row.roundNo > 0 ? Math.floor(row.roundNo) : 1,
    title: row.title,
    description: row.description ?? '',
    categoryId: row.categoryId ?? '',
    priority: toPriority(row.priority),
    assigneeId: row.assigneeId ?? undefined,
    status: toTestCaseStatus(row.status),
    estimateHours: row.estimateHours ?? undefined,
    aiEstimateHours: row.aiEstimateHours ?? undefined,
    plannedTestAt: optionalIso(row.plannedTestAt),
    plannedEndAt: optionalIso(row.plannedEndAt),
    startedAt: optionalIso(row.startedAt),
    completedAt: optionalIso(row.completedAt),
    executedAt: optionalIso(row.completedAt),
    references: asArray<Reference>(row.references),
    aiDraft: Boolean(row.aiDraft),
    aiDraftAt: optionalIso(row.aiDraftAt),
    createdBy: row.creatorId ?? '',
    createdAt: isoString(row.createdAt),
    updatedAt: isoString(row.updatedAt),
  };
}

function toTestCaseStatus(value: string | null | undefined): TestCaseStatus {
  if (value === 'running' || value === 'passed' || value === 'failed' || value === 'blocked') return value;
  return 'pending';
}

function toBugPayload(data: Partial<Bug>) {
  return {
    ...(data.versionId !== undefined && { versionId: data.versionId }),
    ...(data.testCaseId !== undefined && { testCaseId: data.testCaseId }),
    ...(data.bugNo !== undefined && { bugNo: data.bugNo }),
    ...(data.title !== undefined && { title: data.title }),
    ...(data.description !== undefined && { description: data.description }),
    ...(data.status !== undefined && { status: data.status }),
    ...(data.severity !== undefined && { severity: data.severity }),
    ...(data.priority !== undefined && { priority: priorityToNumber(data.priority) }),
    ...(data.assigneeId !== undefined && { assigneeId: data.assigneeId }),
    ...(data.reportedBy !== undefined && { reportedBy: data.reportedBy }),
    ...(data.plannedFixAt !== undefined && { plannedFixAt: data.plannedFixAt }),
    ...(data.resolvedAt !== undefined && { resolvedAt: data.resolvedAt }),
    ...(data.closedAt !== undefined && { closedAt: data.closedAt }),
    ...(data.resolution !== undefined && { resolution: data.resolution }),
  };
}

function normalizeBug(row: DomainBugRow): Bug {
  return {
    id: row.id,
    bugNo: row.code,
    versionId: row.versionId,
    testCaseId: row.testCaseId ?? '',
    title: row.title,
    description: row.description ?? '',
    severity: toBugSeverity(row.severity),
    priority: toPriority(row.priority),
    reportedBy: row.reporterId ?? '',
    assigneeId: row.assigneeId ?? '',
    status: toBugStatus(row.status),
    resolvedAt: optionalIso(row.resolvedAt),
    closedAt: optionalIso(row.closedAt),
    resolution: row.resolution ?? undefined,
    plannedFixAt: optionalIso(row.plannedFixAt),
    createdAt: isoString(row.createdAt),
    updatedAt: isoString(row.updatedAt),
  };
}

function toBugStatus(value: string | null | undefined): BugStatus {
  if (value === 'fixing' || value === 'fixed' || value === 'verifying' || value === 'closed' || value === 'rejected') return value;
  return 'open';
}

function toBugSeverity(value: string | null | undefined): BugSeverity {
  if (value === 'critical' || value === 'major' || value === 'trivial') return value;
  return 'minor';
}

function normalizeMutation<Row, Item>(
  response: DomainMutationResponse<Row>,
  mapper: (row: Row) => Item,
): { item: Item; activities: WorkActivity[] } {
  return {
    item: mapper(response.item),
    activities: (response.activities ?? []).map(normalizeWorkActivity),
  };
}

function normalizeBatchMutation<Row, Item>(
  response: DomainBatchMutationResponse<Row>,
  mapper: (row: Row) => Item,
): { items: Item[]; activities: WorkActivity[] } {
  return {
    items: (response.items ?? []).map(mapper),
    activities: (response.activities ?? []).map(normalizeWorkActivity),
  };
}

function normalizeWorkActivity(row: DomainWorkActivityRow): WorkActivity {
  const metadata = isRecord(row.metadata) ? row.metadata : {};
  return {
    id: row.id,
    actorId: row.actorId ?? row.actorName ?? '',
    date: isoString(row.occurredAt).slice(0, 10),
    occurredAt: isoString(row.occurredAt),
    sourceType: toWorkActivitySourceType(row.sourceType),
    sourceId: row.sourceId,
    action: row.action as WorkActivity['action'],
    category: toWorkActivityCategory(metadata.category),
    title: row.title,
    summary: typeof metadata.summary === 'string' ? metadata.summary : row.title,
    metadata,
  };
}

function toWorkActivitySourceType(value: string): WorkActivitySourceType {
  if (value === 'version_plan' || value === 'dev_task' || value === 'test_case' || value === 'bug') return value;
  return 'manual';
}

function toWorkActivityCategory(value: unknown): WorkActivityCategory {
  if (value === 'delivery' || value === 'progress' || value === 'creation' || value === 'risk') return value;
  return 'note';
}

function asArray<T>(value: unknown): T[] {
  return Array.isArray(value) ? value as T[] : [];
}

function isRecord(value: unknown): value is Record<string, unknown> {
  return typeof value === 'object' && value !== null && !Array.isArray(value);
}