import {z} from 'zod'

export type AppEndpointsExternalV1GenerateInpaintingImageSize = {width: number, height: number};

export type Outline = 'single color black outline' | 'single color outline' | 'selective outline' | 'lineless';

export type Shading = 'flat shading' | 'basic shading' | 'medium shading' | 'detailed shading' | 'highly detailed shading';

export type Detail = 'low detail' | 'medium detail' | 'highly detailed';

export type CameraView = 'side' | 'low top-down' | 'high top-down';

export type Direction = 'north' | 'north-east' | 'east' | 'south-east' | 'south' | 'south-west' | 'west' | 'north-west';

export type Base64Image = {type?: 'base64' | undefined, base64: string};

export type InpaintRequest = {description: string, negative_description?: string | undefined, image_size: AppEndpointsExternalV1GenerateInpaintingImageSize, text_guidance_scale?: number | undefined, extra_guidance_scale?: number | undefined, outline?: (Outline | null) | undefined, shading?: (Shading | null) | undefined, detail?: (Detail | null) | undefined, view?: (CameraView | null) | undefined, direction?: (Direction | null) | undefined, isometric?: boolean | undefined, oblique_projection?: boolean | undefined, no_background?: boolean | undefined, init_image?: (Base64Image | null) | undefined, init_image_strength?: number | undefined, inpainting_image: Base64Image, mask_image: Base64Image, color_image?: (Base64Image | null) | undefined, seed?: (number | null) | undefined};

export type CreateApiInpaintArgs = {body: InpaintRequest};

export type CreateApiInpaintOptions = {baseUrl: string, HTTPBearer?: string | undefined, fetch?: typeof fetch | undefined};

export const usage = z.object({type: z.enum(["usd", "generations"]).optional(), usd: z.number().nullable().optional(), generations: z.number().nullable().optional()});

export const base64Image = z.object({type: z.literal("base64").optional(), base64: z.string()});

export const inpaintResponse = z.object({usage: usage, image: base64Image});

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 image
 * 
 * POST /inpaint
 */
export const createApiInpaint = async (args: CreateApiInpaintArgs, options: CreateApiInpaintOptions) => {
const {baseUrl, fetch: fetchFn = fetch, HTTPBearer} = options ?? {}

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

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

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