import type {
  AcceptServiceApplicationRequest,
  AcceptServiceApplicationResponse,
  AssigneeOption,
  BeneficiaryDetailResponse,
  BeneficiaryTagOption,
  ConfirmUploadResponse,
  CompleteServiceCaseRequest,
  CompleteServiceCaseResponse,
  CreateServiceRecordRequest,
  CreateUploadIntentRequest,
  CreateUploadIntentResponse,
  DownloadUrlResponse,
  PaginatedBeneficiariesResponse,
  PaginatedServiceCasesResponse,
  ReplaceCaseAssigneesRequest,
  ServiceCaseDetailResponse,
  ServiceCategory,
  ServiceCaseStatus,
  ServiceRecordResponse,
  TransitionServiceApplicationRequest,
  UpdateBeneficiaryRequest,
  UpdateServiceRecordRequest,
} from '@lehuo/contracts';

import { apiRequest } from './api-client';

function queryString(values: Record<string, string | number | boolean | undefined>): string {
  const params = new URLSearchParams();
  Object.entries(values).forEach(([key, value]) => {
    if (value !== undefined && value !== '') params.set(key, String(value));
  });
  return params.toString();
}

export function transitionServiceApplication(
  publicId: string,
  input: TransitionServiceApplicationRequest,
): Promise<{ status: string }> {
  return apiRequest(
    `/api/v1/admin/service-applications/${encodeURIComponent(publicId)}/transition`,
    {
      method: 'POST',
      body: JSON.stringify(input),
    },
  );
}

export function acceptServiceApplication(
  publicId: string,
  input: AcceptServiceApplicationRequest,
): Promise<AcceptServiceApplicationResponse> {
  return apiRequest(`/api/v1/admin/service-applications/${encodeURIComponent(publicId)}/accept`, {
    method: 'POST',
    body: JSON.stringify(input),
  });
}

export function fetchBeneficiaryTags(): Promise<BeneficiaryTagOption[]> {
  return apiRequest('/api/v1/admin/beneficiaries/tags');
}

export function fetchBeneficiaries(query: {
  page: number;
  pageSize: number;
  primaryCategory?: ServiceCategory;
  status?: string;
  keyCareFlag?: boolean;
}): Promise<PaginatedBeneficiariesResponse> {
  return apiRequest(`/api/v1/admin/beneficiaries?${queryString(query)}`);
}

export function fetchBeneficiary(publicId: string): Promise<BeneficiaryDetailResponse> {
  return apiRequest(`/api/v1/admin/beneficiaries/${encodeURIComponent(publicId)}`);
}

export function updateBeneficiary(
  publicId: string,
  input: UpdateBeneficiaryRequest,
): Promise<BeneficiaryDetailResponse> {
  return apiRequest(`/api/v1/admin/beneficiaries/${encodeURIComponent(publicId)}`, {
    method: 'PUT',
    body: JSON.stringify(input),
  });
}

export function fetchAssigneeOptions(): Promise<AssigneeOption[]> {
  return apiRequest('/api/v1/admin/service-cases/assignee-options');
}

export function fetchServiceCases(query: {
  page: number;
  pageSize: number;
  status?: ServiceCaseStatus;
  category?: ServiceCategory;
  caseNo?: string;
}): Promise<PaginatedServiceCasesResponse> {
  return apiRequest(`/api/v1/admin/service-cases?${queryString(query)}`);
}

export function fetchServiceCase(publicId: string): Promise<ServiceCaseDetailResponse> {
  return apiRequest(`/api/v1/admin/service-cases/${encodeURIComponent(publicId)}`);
}

export function startServiceCase(publicId: string): Promise<ServiceCaseDetailResponse> {
  return apiRequest(`/api/v1/admin/service-cases/${encodeURIComponent(publicId)}/start`, {
    method: 'POST',
    body: '{}',
  });
}

export function completeServiceCase(
  publicId: string,
  input: CompleteServiceCaseRequest,
): Promise<CompleteServiceCaseResponse> {
  return apiRequest(`/api/v1/admin/service-cases/${encodeURIComponent(publicId)}/complete`, {
    method: 'POST',
    body: JSON.stringify(input),
  });
}

export function replaceCaseAssignees(
  publicId: string,
  input: ReplaceCaseAssigneesRequest,
): Promise<ServiceCaseDetailResponse> {
  return apiRequest(`/api/v1/admin/service-cases/${encodeURIComponent(publicId)}/assignees`, {
    method: 'PUT',
    body: JSON.stringify(input),
  });
}

export function createServiceRecord(
  publicId: string,
  input: CreateServiceRecordRequest,
): Promise<ServiceRecordResponse> {
  return apiRequest(`/api/v1/admin/service-cases/${encodeURIComponent(publicId)}/records`, {
    method: 'POST',
    body: JSON.stringify(input),
  });
}

export function updateServiceRecord(
  casePublicId: string,
  recordPublicId: string,
  input: UpdateServiceRecordRequest,
): Promise<ServiceRecordResponse> {
  return apiRequest(
    `/api/v1/admin/service-cases/${encodeURIComponent(casePublicId)}/records/${encodeURIComponent(recordPublicId)}`,
    { method: 'PATCH', body: JSON.stringify(input) },
  );
}

export function createUploadIntent(
  casePublicId: string,
  input: CreateUploadIntentRequest,
): Promise<CreateUploadIntentResponse> {
  return apiRequest(
    `/api/v1/service-cases/${encodeURIComponent(casePublicId)}/files/upload-intents`,
    { method: 'POST', body: JSON.stringify(input) },
  );
}

export function confirmUpload(publicId: string): Promise<ConfirmUploadResponse> {
  return apiRequest(`/api/v1/files/${encodeURIComponent(publicId)}/confirm`, {
    method: 'POST',
    body: '{}',
  });
}

export function fetchDownloadUrl(publicId: string): Promise<DownloadUrlResponse> {
  return apiRequest(`/api/v1/files/${encodeURIComponent(publicId)}/download-url`);
}