import {z} from 'zod'

export type CreateApiDocumentsUploadArgs = {author?: (string | null) | undefined, tags?: (string | null) | undefined, source_url?: (string | null) | undefined, description?: (string | null) | undefined, original_date?: (string | null) | undefined, effective_from?: (string | null) | undefined, pot_id?: (string | null) | undefined, body: BodyInit};

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

export const documentUploadResponse = z.object({document_id: z.string(), filename: z.string(), size_bytes: z.number().int(), stored_bytes: z.number().int(), type: z.string(), conversion_status: z.string(), message: z.string().optional()});

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 a document file
 * 
 * POST /documents/upload
 */
export const createApiDocumentsUpload = async (args: CreateApiDocumentsUploadArgs, options: CreateApiDocumentsUploadOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args.author != null) query.append("author", String(args.author))
if (args.tags != null) query.append("tags", String(args.tags))
if (args.source_url != null) query.append("source_url", String(args.source_url))
if (args.description != null) query.append("description", String(args.description))
if (args.original_date != null) query.append("original_date", String(args.original_date))
if (args.effective_from != null) query.append("effective_from", String(args.effective_from))
if (args.pot_id != null) query.append("pot_id", String(args.pot_id))

const url = `${baseUrl.replace(/\/+$/, '')}/documents/upload${query.size > 0 ? `?${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(documentUploadResponse, await res.json())
};