import {z} from 'zod'

export type FalBridgeTextToVideoRequest = {actor_id?: (string | null) | undefined, script: string, video_reference_url?: (string | null) | undefined, audio_reference_url?: (string | null) | undefined};

export type CreateApiInternalFalVideosTextToVideoArgs = {'x-fal-request-id': string, 'x-api-key': string, body: FalBridgeTextToVideoRequest};

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

export const falBridgeSubmitResponse = z.object({video_id: z.string(), status: z.enum(["PROCESSING", "FAILED", "CANCELLED", "COMPLETE"]), duration_ms: z.number().int().nullable().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
};

/**
 * Submit Fal Text To Video
 * 
 * POST /internal/fal/videos/text-to-video
 */
export const createApiInternalFalVideosTextToVideo = async (args: CreateApiInternalFalVideosTextToVideoArgs, options: CreateApiInternalFalVideosTextToVideoOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

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

const url = `${baseUrl.replace(/\/+$/, '')}/internal/fal/videos/text-to-video${query.size > 0 ? `?${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(falBridgeSubmitResponse, await res.json())
};