import {z} from 'zod'

export type GetApiApiAssetsRemoteMetadataArgs = {url: string};

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

export const validationError = z.object({code: z.string(), message: z.string(), field: z.string()});

export const validationResult = z.object({is_valid: z.boolean(), errors: z.array(validationError).optional(), warnings: z.array(validationError).optional()});

export const assetMetadataResponse = z.object({content_length: z.number().int(), content_type: z.string().optional(), filename: z.string().optional(), name: z.string().optional(), tags: z.array(z.string()).optional(), preview_image: z.string().optional(), validation: validationResult.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
};

/**
 * Get asset metadata from remote URL
 * 
 * GET /api/assets/remote-metadata
 */
export const getApiApiAssetsRemoteMetadata = async (args: GetApiApiAssetsRemoteMetadataArgs, options?: GetApiApiAssetsRemoteMetadataOptions) => {
const {baseUrl = "https://api.comfy.org", fetch: fetchFn = fetch} = options ?? {}

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

if (args.url != null) query.append("url", String(args.url))

const url = `${baseUrl.replace(/\/+$/, '')}/api/assets/remote-metadata${query.size > 0 ? `?${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(assetMetadataResponse, await res.json())
};