import {z} from 'zod'

export type GenerateUploadUrlRequest = {contentType: 'image/jpeg' | 'image/jpg' | 'image/png' | 'application/pdf', filename: string};

export type CreateApiApiDocumentsGenerateUploadUrlArgs = {'on-behalf-of'?: string | undefined, 'idempotency-key': string, body: GenerateUploadUrlRequest};

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

export const generateUploadUrlResponse = z.object({documentId: z.string(), expiresAt: z.string(), uploadUrl: z.string(), uploadUrlFormFields: z.object({})});

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
};

/**
 * Get an upload URL for a document
 * 
 * POST /api/documents/generate-upload-url
 */
export const createApiApiDocumentsGenerateUploadUrl = async (args: CreateApiApiDocumentsGenerateUploadUrlArgs, options?: CreateApiApiDocumentsGenerateUploadUrlOptions) => {
const {baseUrl = "https://api.muralpay.com", fetch: fetchFn = fetch, bearer} = options ?? {}

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

if (args['on-behalf-of'] != null) headers.set("on-behalf-of", String(args['on-behalf-of']))
if (args['idempotency-key'] != null) headers.set("idempotency-key", String(args['idempotency-key']))
if (bearer !== undefined) headers.set('authorization', `Bearer ${bearer}`)

const url = `${baseUrl.replace(/\/+$/, '')}/api/documents/generate-upload-url${query.size > 0 ? `?${query}` : ''}`

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

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

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