import {z} from 'zod'

export type GetApiFolderPathArgs = {folder_path: string, depth?: number | undefined};

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

export const documentSummary = z.object({name: z.string().optional(), displayName: z.string().optional(), contentType: z.string().optional(), path: z.string().optional(), branches: z.array(z.string()).optional()});

export const simpleFolder = z.object({type: z.string(), path: z.string(), displayName: z.string().optional(), locale: z.string().optional(), restricted: z.boolean().optional(), allowedDocumentTypes: z.array(z.string()).optional(), allowedFolderTypes: z.array(z.string()).optional(), readUsers: z.array(z.string()).optional(), writeUsers: z.array(z.string()).optional(), documents: z.array(documentSummary).optional(), resourceBundles: z.array(documentSummary).optional(), folders: z.array(z.lazy(() => folder)).optional()});

export const pageSummary = z.object({name: z.string().optional(), displayName: z.string().optional(), contentType: z.string().optional(), path: z.string().optional(), branches: z.array(z.string()).optional(), channel: z.string().optional(), relativePagePath: z.string().optional()});

export const pageFolder = z.object({type: z.string(), path: z.string(), displayName: z.string().optional(), locale: z.string().optional(), restricted: z.boolean().optional(), allowedDocumentTypes: z.array(z.string()).optional(), allowedFolderTypes: z.array(z.string()).optional(), readUsers: z.array(z.string()).optional(), writeUsers: z.array(z.string()).optional(), documents: z.array(documentSummary).optional(), resourceBundles: z.array(documentSummary).optional(), folders: z.array(z.lazy(() => folder)).optional(), channel: z.string(), pages: z.array(pageSummary).optional()});

export const folder: z.ZodType<Folder> = z.discriminatedUnion("type", [simpleFolder, pageFolder]);

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 a folder
 * 
 * GET /{folder_path}
 */
export const getApiFolderPath = async (args: GetApiFolderPathArgs, options?: GetApiFolderPathOptions) => {
const {baseUrl = "https://developers.bloomreach.io/delivery/site/v2/documents", fetch: fetchFn = fetch} = options ?? {}

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

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

const url = `${baseUrl.replace(/\/+$/, '')}/${encodeURIComponent(String(args.folder_path))}${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(folder, await res.json())
};