import {z} from 'zod'

export type ImageGenerateRequest = {prompt: string, prompt_2?: string | undefined, negative_prompt?: string | undefined, negative_prompt_2?: string | undefined, num_inference_steps?: number | undefined, guidance_scale?: number | undefined, guidance_rescale?: number | undefined, seed?: number | undefined, number_of_images?: number | undefined, crop_coords_top_left?: Array<number> | undefined, timesteps?: Array<number> | undefined, sigmas?: Array<number> | undefined, lora_path?: string | undefined, lora_scale?: number | undefined, image_return_format?: ('JPEG' | 'PNG') | undefined, image_quality?: number | undefined, image?: string | undefined, mask?: string | undefined, strength?: number | undefined};

export type CreateApiV1ImagesEditsArgs = {body: ImageGenerateRequest};

export type CreateApiV1ImagesEditsOptions = {baseUrl: string, BearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const imageResponse = z.object({images: z.array(z.string()), generation_time: z.number().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
};

/**
 * Edit / inpaint image
 * 
 * POST /v1/images/edits
 */
export const createApiV1ImagesEdits = async (args: CreateApiV1ImagesEditsArgs, options: CreateApiV1ImagesEditsOptions) => {
const {baseUrl, fetch: fetchFn = fetch, BearerAuth} = options ?? {}

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

if (BearerAuth !== undefined) headers.set('authorization', `Bearer ${BearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/images/edits${query.size > 0 ? `?${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(imageResponse, await res.json())
};