import {z} from 'zod'

export type ContentGenerateImageRequest = {prompt?: string | undefined, mode?: ('text-to-image' | 'image-editing') | undefined, aspectRatio?: ('16:9' | '3:2' | '4:3' | '1:1' | '4:5' | '2:3' | '3:4' | '9:16') | undefined, image1?: string | undefined, image2?: string | undefined, adCreative?: ({brandName: string, headline: string, cta: string, format: '1:1' | '4:5' | '9:16' | '16:9', archetype: 'product-ui-card' | 'mascot' | 'flat-illustration' | 'abstract-brand' | 'type-led' | 'photo-ui-overlay' | 'conceptual-3d' | 'gradient-field' | 'editorial-photo' | 'collage' | 'isometric-blueprint' | 'data-viz', layout?: ('split-right' | 'split-left' | 'stacked-center' | 'visual-first' | 'type-poster' | 'immersive-field' | 'layered-collage' | 'badge-offer' | 'diagonal-stage' | 'editorial-grid') | undefined, eyebrow?: string | undefined, subjectImageUrl?: string | undefined, emailCanvasColor?: string | undefined, palette: {background: string, accent: string, headlineColor: string}, supportingVisual?: string | undefined, subhead?: string | undefined}) | undefined};

export type CreateApiV1ContentGenerateImageArgs = {'Idempotency-Key'?: string | undefined, body: ContentGenerateImageRequest};

export type CreateApiV1ContentGenerateImageOptions = {baseUrl?: string | undefined, bearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const contentImageResponse = z.object({url: z.string(), prompt: z.string(), description: z.string().optional(), warnings: z.array(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
};

/**
 * Generate an image
 * 
 * POST /v1/content/generate-image
 * 
 * Also accepts auth: apiKeyAuth
 */
export const createApiV1ContentGenerateImage = async (args: CreateApiV1ContentGenerateImageArgs, options?: CreateApiV1ContentGenerateImageOptions) => {
const {baseUrl = "https://brew.new/api", 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 (args['Idempotency-Key'] != null) headers.set("Idempotency-Key", String(args['Idempotency-Key']))
if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/content/generate-image${query.size > 0 ? `?${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(contentImageResponse, await res.json())
};