import {z} from 'zod'

export type CreateApiV1ImagesGenerationsArgs = {body: {model: string, prompt: string, n?: number | undefined, quality?: string | undefined, size?: string | undefined, response_format?: ('url' | 'b64_json') | undefined, output_format?: string | undefined}};

export type CreateApiV1ImagesGenerationsOptions = {baseUrl?: string | undefined, bearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const createApiV1ImagesGenerationsResponse = z.object({created: z.number().int(), background: z.string().optional(), output_format: z.string().optional(), quality: z.string().optional(), size: z.string().optional(), usage: z.object({input_tokens: z.number().int().optional(), output_tokens: z.number().int().optional(), total_tokens: z.number().int().optional(), input_tokens_details: z.object({image_tokens: z.number().int().optional(), text_tokens: z.number().int().optional()}).optional()}), data: z.array(z.object({url: z.string().optional(), b64_json: z.string().optional(), revised_prompt: z.string().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 images
 * 
 * POST /v1/images/generations
 */
export const createApiV1ImagesGenerations = async (args: CreateApiV1ImagesGenerationsArgs, options?: CreateApiV1ImagesGenerationsOptions) => {
const {baseUrl = "https://api.deerapi.com", 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/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(createApiV1ImagesGenerationsResponse, await res.json())
};