import {z} from 'zod'

export type GetApiSearchPartnerPinsArgs = {term: string, country_code: string, bookmark?: string | undefined, locale?: string | undefined, limit?: number | undefined};

export type GetApiSearchPartnerPinsOptions = {baseUrl?: string | undefined, pinterestOauth2?: string | undefined, fetch?: typeof fetch | undefined};

export const imageDetails = z.object({height: z.number().int().nullable(), url: z.string(), width: z.number().int().nullable()});

export const imageSize = z.object({"1200x": imageDetails.optional(), "150x150": imageDetails.optional(), "400x300": imageDetails.optional(), "600x": imageDetails.optional()});

export const imageMetadata = z.object({description: z.string().nullable().optional(), images: imageSize.optional(), item_type: z.literal("image"), link: z.string().nullable().optional(), title: z.string().nullable().optional()});

export const videoMetadataWithItemType = z.object({cover_image_url: z.string().optional(), duration: z.number().nullable().optional(), height: z.number().int().nullable().optional(), item_type: z.literal("video"), video_url: z.string().nullable().optional(), video_url_hls: z.string().nullable().optional(), width: z.number().int().nullable().optional()});

export const pinMediaMetadata = z.discriminatedUnion("item_type", [z.object({description: z.string().nullable().optional(), images: imageSize.optional(), item_type: z.literal("image"), link: z.string().nullable().optional(), title: z.string().nullable().optional()}), z.object({cover_image_url: z.string().optional(), duration: z.number().nullable().optional(), height: z.number().int().nullable().optional(), item_type: z.literal("video"), video_url: z.string().nullable().optional(), video_url_hls: z.string().nullable().optional(), width: z.number().int().nullable().optional()})]);

export const pinMedia = z.discriminatedUnion("media_type", [z.object({images: imageSize.optional(), media_type: z.literal("image")}), z.object({cover_image_url: z.string().optional(), duration: z.number().nullable().optional(), height: z.number().int().nullable().optional(), images: imageSize.optional(), media_type: z.literal("video"), video_url: z.string().nullable().optional(), video_url_hls: z.string().nullable().optional(), width: z.number().int().nullable().optional()}), z.object({items: z.array(imageMetadata).optional(), media_type: z.literal("multiple_images")}), z.object({items: z.array(videoMetadataWithItemType).optional(), media_type: z.literal("multiple_videos")}), z.object({items: z.array(pinMediaMetadata).optional(), media_type: z.literal("multiple_mixed")})]);

export const summaryPin = z.object({alt_text: z.string().max(500).nullable().optional(), description: z.string().max(800).nullable().optional(), id: z.string(), link: z.string().max(2048).nullable().optional(), media: pinMedia.optional(), title: z.string().max(100).nullable().optional()});

export const getApiSearchPartnerPinsResponse = z.object({bookmark: z.string().nullable().optional(), items: z.array(summaryPin)});

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
};

/**
 * Search pins by a given search term
 * 
 * GET /search/partner/pins
 */
export const getApiSearchPartnerPins = async (args: GetApiSearchPartnerPinsArgs, options?: GetApiSearchPartnerPinsOptions) => {
const {baseUrl = "https://api.pinterest.com/v5", fetch: fetchFn = fetch, pinterestOauth2} = options ?? {}

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

if (args.term != null) query.append("term", String(args.term))
if (args.country_code != null) query.append("country_code", String(args.country_code))
if (args.bookmark != null) query.append("bookmark", String(args.bookmark))
if (args.locale != null) query.append("locale", String(args.locale))
if (args.limit != null) query.append("limit", String(args.limit))
if (pinterestOauth2 !== undefined) headers.set('authorization', `Bearer ${pinterestOauth2}`)

const url = `${baseUrl.replace(/\/+$/, '')}/search/partner/pins${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "GET", headers})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(getApiSearchPartnerPinsResponse, await res.json())
};