import {z} from 'zod'

export type GetApiAttachmentsArgs = {page?: number | undefined, pageSize?: number | undefined, candidateId?: string | undefined, companyId?: string | undefined, vacancyId?: string | undefined, type?: ('UNASSIGNED' | 'CV') | undefined};

export type GetApiAttachmentsOptions = {baseUrl: string, xApiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const paginationDto = z.object({totalItems: z.number(), page: z.number(), hasNextPage: z.boolean()});

export const attachmentCustomTypeDto = z.object({id: z.string(), name: z.string()});

export const dateISO = z.string();

export const attachmentDto = z.object({attachmentId: z.string(), attachmentName: z.string().nullable(), type: z.enum(["UNASSIGNED", "CV"]).nullable(), customType: attachmentCustomTypeDto.nullable(), createdAt: dateISO, extension: z.string().nullable(), size: z.number().nullable()});

export const paginatedAttachmentsDto = z.object({pagination: paginationDto, items: z.array(attachmentDto)});

export const validateResponse = async <Output>(
  schema: {
    readonly '~standard': {
      readonly validate: (value: unknown) => ({ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }) | Promise<{ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }>
    }
  },
  value: unknown
): Promise<Output> => {
  const result = await schema['~standard'].validate(value)

  if (result.issues !== undefined) {
    const detail = result.issues
      .map(({ message, path }) =>
        path?.length
          ? `${path.map((segment) => String(typeof segment === 'object' ? segment.key : segment)).join('.')}: ${message}`
          : message
      )
      .join('; ')

    throw new Error(`Response does not match the schema: ${detail}`, { cause: { issues: result.issues } })
  }

  return result.value
};

/**
 * List attachments
 * 
 * GET /attachments
 */
export const getApiAttachments = async (args: GetApiAttachmentsArgs, options: GetApiAttachmentsOptions) => {
const {baseUrl, fetch: fetchFn = fetch, xApiKey} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('accept', "application/json")

if (args.page != null) query.append("page", String(args.page))
if (args.pageSize != null) query.append("pageSize", String(args.pageSize))
if (args.candidateId != null) query.append("candidateId", String(args.candidateId))
if (args.companyId != null) query.append("companyId", String(args.companyId))
if (args.vacancyId != null) query.append("vacancyId", String(args.vacancyId))
if (args.type != null) query.append("type", String(args.type))
if (xApiKey !== undefined) headers.set("x-api-key", xApiKey)

const url = `${baseUrl.replace(/\/+$/, '')}/attachments${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "GET", headers})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(paginatedAttachmentsDto, await res.json())
};