import {z} from 'zod'

export type OutputFormat = 'jpeg' | 'png' | 'webp';

export type FluxProFillInputs = {user?: (string | null) | undefined, image: string, mask?: (string | null) | undefined, prompt?: (string | null) | undefined, steps?: (number | null) | undefined, prompt_upsampling?: (boolean | null) | undefined, seed?: (number | null) | undefined, guidance?: (number | null) | undefined, output_format?: (OutputFormat | null) | undefined, safety_tolerance?: number | undefined, webhook_url?: (string | null) | undefined, webhook_secret?: (string | null) | undefined};

export type CreateApiV1FluxPro10FillArgs = {body: FluxProFillInputs};

export type CreateApiV1FluxPro10FillOptions = {baseUrl?: string | undefined, APIKeyHeader?: string | undefined, fetch?: typeof fetch | undefined};

export const asyncResponse = z.object({id: z.string(), polling_url: z.string(), cost: z.number().nullable().optional(), input_mp: z.number().nullable().optional(), output_mp: z.number().nullable().optional()});

export const asyncWebhookResponse = z.object({id: z.string(), status: z.string(), webhook_url: z.string(), cost: z.number().nullable().optional(), input_mp: z.number().nullable().optional(), output_mp: z.number().nullable().optional()});

export const createApiV1FluxPro10FillResponse = z.union([asyncResponse, asyncWebhookResponse]);

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
};

/**
 * Inpaint an image with FLUX.1 Fill [pro] using an input image and mask
 * 
 * POST /v1/flux-pro-1.0-fill
 */
export const createApiV1FluxPro10Fill = async (args: CreateApiV1FluxPro10FillArgs, options?: CreateApiV1FluxPro10FillOptions) => {
const {baseUrl = "https://api.bfl.ai", fetch: fetchFn = fetch, APIKeyHeader} = options ?? {}

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

if (APIKeyHeader !== undefined) headers.set("x-key", APIKeyHeader)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/flux-pro-1.0-fill${query.size > 0 ? `?${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(createApiV1FluxPro10FillResponse, await res.json())
};