import { getBearerAuthHeaders } from './authHeaders';
import { projectSettingsErrorFromResponse } from './projectSettingsError';

export type ApiProjectMemberRole = 'owner' | 'member' | 'viewer';
export type ApiProjectMemberStatus = 'active' | 'exited';
export type ApiDocumentDuty = 'author' | 'reviewer' | 'approver' | '';

export interface ApiProjectMemberRecord {
  id?: number;
  project_id?: number;
  user_id: number;
  username?: string;
  name?: string;
  project_role: ApiProjectMemberRole;
  document_duty?: ApiDocumentDuty;
  status: ApiProjectMemberStatus;
  joined_at?: string;
}

export interface ListProjectMembersResponse {
  members: ApiProjectMemberRecord[];
}

export interface UpsertProjectMemberPayload {
  user_id: number;
  project_role: ApiProjectMemberRole;
  document_duty?: ApiDocumentDuty;
  status?: ApiProjectMemberStatus;
}

async function memberApiError(res: Response, fallback: string) {
  const text = await res.text();
  return projectSettingsErrorFromResponse(res.status, text, fallback);
}

export async function listProjectMembers(projectId: number): Promise<ApiProjectMemberRecord[]> {
  const res = await fetch(`/api/v1/projects/${projectId}/members`, {
    headers: getBearerAuthHeaders(),
  });
  if (!res.ok) {
    throw await memberApiError(res, `获取项目成员失败: ${res.status}`);
  }
  const data: ListProjectMembersResponse = await res.json();
  return data.members ?? [];
}

export async function addProjectMember(
  projectId: number,
  payload: UpsertProjectMemberPayload
): Promise<void> {
  const res = await fetch(`/api/v1/projects/${projectId}/members`, {
    method: 'POST',
    headers: getBearerAuthHeaders('application/json'),
    body: JSON.stringify(payload),
  });
  if (!res.ok) {
    throw await memberApiError(res, `添加项目成员失败: ${res.status}`);
  }
}

export async function updateProjectMember(
  projectId: number,
  payload: UpsertProjectMemberPayload
): Promise<void> {
  const res = await fetch(`/api/v1/projects/${projectId}/members`, {
    method: 'PUT',
    headers: getBearerAuthHeaders('application/json'),
    body: JSON.stringify(payload),
  });
  if (!res.ok) {
    throw await memberApiError(res, `更新项目成员失败: ${res.status}`);
  }
}

export async function removeProjectMember(projectId: number, userId: number): Promise<void> {
  const res = await fetch(
    `/api/v1/projects/${projectId}/members?user_id=${encodeURIComponent(String(userId))}`,
    {
      method: 'DELETE',
      headers: getBearerAuthHeaders(),
    }
  );
  if (!res.ok) {
    throw await memberApiError(res, `移出项目成员失败: ${res.status}`);
  }
}