import {z} from 'zod'

export type CreateApiV1FilesArgs = {'x-api-key': string, 'User-Agent'?: (string | null) | undefined, body: BodyInit};

export type CreateApiV1FilesOptions = {baseUrl: string, fetch?: typeof fetch | undefined};

export const fileReferenceResponse = z.object({id: z.string(), filename: z.string().nullable(), mime_type: z.string(), size_bytes: z.number().int(), created_at: z.string(), expires_at: z.string().nullable()});

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
};

/**
 * Upload File
 * 
 * POST /v1/files
 */
export const createApiV1Files = async (args: CreateApiV1FilesArgs, options: CreateApiV1FilesOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args['x-api-key'] != null) headers.set("x-api-key", String(args['x-api-key']))
if (args['User-Agent'] != null) headers.set("User-Agent", String(args['User-Agent']))

const url = `${baseUrl.replace(/\/+$/, '')}/v1/files${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: args.body})

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

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