import {z} from 'zod'

export type CreateApiOptionsInfoArgs = {Prefer?: 'respond-async' | undefined, body: {_config?: {[key: string]: unknown} | undefined, _filter?: {[key: string]: unknown} | undefined, _group?: string | undefined, blocks?: string | undefined}};

export type CreateApiOptionsInfoOptions = {baseUrl?: string | undefined, basicAuth?: {username: string, password: string} | undefined, fetch?: typeof fetch | undefined};

export const optionsInfoOptionExample = z.object({Value: z.string(), Help: z.string()}).and(z.record(z.string(), z.unknown()));

export const optionsInfoOption = z.object({Name: z.string(), FieldName: z.string(), Help: z.string(), Default: z.union([z.array(z.string()), z.boolean(), z.number(), z.string(), z.object({Value: z.boolean(), Valid: z.boolean()})]), Value: z.union([z.array(z.string()), z.boolean(), z.number(), z.string(), z.object({Value: z.boolean(), Valid: z.boolean()})]).nullable(), Hide: z.number().int(), Required: z.boolean(), IsPassword: z.boolean(), NoPrefix: z.boolean(), Advanced: z.boolean(), Exclusive: z.boolean(), Sensitive: z.boolean(), DefaultStr: z.string(), ValueStr: z.string(), Type: z.string(), Groups: z.string().optional(), ShortOpt: z.string().optional(), Examples: z.array(optionsInfoOptionExample).optional()}).and(z.record(z.string(), z.unknown()));

export const createApiOptionsInfoResponse = z.object({dlna: z.array(optionsInfoOption).optional(), filter: z.array(optionsInfoOption).optional(), ftp: z.array(optionsInfoOption).optional(), http: z.array(optionsInfoOption).optional(), log: z.array(optionsInfoOption).optional(), main: z.array(optionsInfoOption).optional(), mount: z.array(optionsInfoOption).optional(), nfs: z.array(optionsInfoOption).optional(), proxy: z.array(optionsInfoOption).optional(), rc: z.array(optionsInfoOption).optional(), restic: z.array(optionsInfoOption).optional(), s3: z.array(optionsInfoOption).optional(), sftp: z.array(optionsInfoOption).optional(), vfs: z.array(optionsInfoOption).optional(), webdav: z.array(optionsInfoOption).optional()}).and(z.record(z.string(), z.array(optionsInfoOption)));

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
};

/**
 * Describe options
 * 
 * POST /options/info
 */
export const createApiOptionsInfo = async (args: CreateApiOptionsInfoArgs, options?: CreateApiOptionsInfoOptions) => {
const {baseUrl = "http://localhost:5572", fetch: fetchFn = fetch, basicAuth} = options ?? {}

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

if (args.Prefer != null) headers.set("Prefer", String(args.Prefer))
if (basicAuth !== undefined) headers.set('authorization', `Basic ${btoa(`${basicAuth.username}:${basicAuth.password}`)}`)

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