import {z} from 'zod'

export type ImageGenerationRequest = {model: string, prompt: string, enhance_prompt?: boolean | undefined, go_fast?: boolean | undefined, guidance?: number | undefined, negative_prompt?: string | undefined, num_inference_steps?: number | undefined, seed?: (number | null) | undefined, disable_safety_checker?: boolean | undefined, image?: (string | null) | undefined, strength?: number | undefined, lora_weights?: (string | null) | undefined, lora_scale?: number | undefined, extra_lora_weights?: Array<string> | undefined, extra_lora_scale?: Array<number> | undefined, aspect_ratio?: string | undefined, image_size?: string | undefined, output_format?: string | undefined, output_quality?: number | undefined};

export type CreateApiImagesGenerationsArgs = {body: ImageGenerationRequest};

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

export const imageGenerationResponse = z.object({created: z.number().int().optional(), data: z.array(z.object({url: z.string().nullable().optional(), b64_json: z.string().nullable().optional()})).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
};

/**
 * Create Image
 * 
 * POST /images/generations
 */
export const createApiImagesGenerations = async (args: CreateApiImagesGenerationsArgs, options?: CreateApiImagesGenerationsOptions) => {
const {baseUrl = "https://platform.qubrid.com/v1", 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 = `${baseUrl.replace(/\/+$/, '')}/images/generations${query.size > 0 ? `?${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(imageGenerationResponse, await res.json())
};