/**
 * 立项成功后将非创建者初始成员持久化到受权 project_members API。
 * 禁止仅写本地 allUsers/sessions 造成「页面勾选成功、库表无成员」假成功。
 */

import type { UpsertProjectMemberPayload } from '../api/projectMembers';
import { toApiProjectRole } from './projectMemberAdapter';
import { documentDutyFromMemberRole } from './projectDocumentDuty';
import type { ProjectMemberRole } from '../types/workbench';

export type InitialProjectMemberInput = {
  userId: number;
  userName: string;
  department?: string;
  position?: string;
  role: ProjectMemberRole;
};

export function selectNonCreatorInitialMembers(
  initialMembers: InitialProjectMemberInput[],
  creatorUserId: number,
): InitialProjectMemberInput[] {
  return initialMembers.filter((m) => m.userId !== creatorUserId);
}

export function buildInitialMemberUpsertPayload(
  member: InitialProjectMemberInput,
  creatorUserId: number,
): UpsertProjectMemberPayload {
  return buildManagedMemberUpsertPayload(
    { userId: member.userId, role: member.role },
    creatorUserId,
  );
}

export function buildManagedMemberUpsertPayload(
  input: { userId: number; role: ProjectMemberRole; status?: 'active' | 'exited' },
  creatorUserId: number,
): UpsertProjectMemberPayload {
  const payload: UpsertProjectMemberPayload = {
    user_id: input.userId,
    project_role: toApiProjectRole(input.role, input.userId, creatorUserId),
    document_duty: documentDutyFromMemberRole(input.role),
  };
  if (input.status) {
    payload.status = input.status;
  }
  return payload;
}

export type AddProjectMemberFn = (
  projectId: number,
  payload: UpsertProjectMemberPayload,
) => Promise<void>;

/**
 * 逐一 upsert 非创建者；任一失败抛错（调用方保留已创建 projectId 以便重试幂等）。
 * Upsert 语义下重复确认不会因已存在成员而假失败。
 */
export async function persistInitialProjectMembers(params: {
  projectId: number;
  creatorUserId: number;
  initialMembers: InitialProjectMemberInput[];
  addMember: AddProjectMemberFn;
}): Promise<{ persistedUserIds: number[] }> {
  const targets = selectNonCreatorInitialMembers(params.initialMembers, params.creatorUserId);
  const persistedUserIds: number[] = [];
  for (const member of targets) {
    const payload = buildInitialMemberUpsertPayload(member, params.creatorUserId);
    await params.addMember(params.projectId, payload);
    persistedUserIds.push(member.userId);
  }
  return { persistedUserIds };
}

export type CreateProjectEnsurePhase = 'creating' | 'syncing_members';

/**
 * 若已有 bootstrapProjectId（上次 create 成功但成员失败），跳过再次 createProject，仅补成员。
 */
export async function ensureCreatedProjectWithMembers(params: {
  bootstrapProjectId: number | null;
  createProject: () => Promise<{ id: number }>;
  creatorUserId: number;
  initialMembers: InitialProjectMemberInput[];
  addMember: AddProjectMemberFn;
  /** 可选：驱动 UI「立项中 / 同步成员中」文案（不参与控制流）。 */
  onPhase?: (phase: CreateProjectEnsurePhase) => void;
}): Promise<{ projectId: number; createdNow: boolean; persistedUserIds: number[] }> {
  let projectId = params.bootstrapProjectId;
  let createdNow = false;
  if (projectId == null || projectId <= 0) {
    params.onPhase?.('creating');
    const created = await params.createProject();
    projectId = created.id;
    createdNow = true;
  }
  params.onPhase?.('syncing_members');
  try {
    const { persistedUserIds } = await persistInitialProjectMembers({
      projectId,
      creatorUserId: params.creatorUserId,
      initialMembers: params.initialMembers,
      addMember: params.addMember,
    });
    return { projectId, createdNow, persistedUserIds };
  } catch (err) {
    const wrapped = err instanceof Error ? err : new Error(String(err));
    (wrapped as Error & { projectId?: number }).projectId = projectId;
    throw wrapped;
  }
}