import {z} from 'zod'

export type GetApiMatrixClientV3PublicRoomsArgs = {limit?: number | undefined, since?: string | undefined, server?: unknown | undefined};

export type GetApiMatrixClientV3PublicRoomsOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const getApiMatrixClientV3PublicRoomsResponse = z.object({chunk: z.array(z.object({avatar_url: z.string().optional(), canonical_alias: z.string().optional(), guest_can_join: z.boolean(), join_rule: z.string().optional(), name: z.string().optional(), num_joined_members: z.number().int(), room_id: z.string(), room_type: z.string().optional(), topic: z.string().optional(), world_readable: z.boolean()})), next_batch: z.string().optional(), prev_batch: z.string().optional(), total_room_count_estimate: z.number().int().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
};

/**
 * Lists a server's published room directory
 * 
 * GET /_matrix/client/v3/publicRooms
 */
export const getApiMatrixClientV3PublicRooms = async (args: GetApiMatrixClientV3PublicRoomsArgs, options?: GetApiMatrixClientV3PublicRoomsOptions) => {
const {baseUrl = "https://matrix.org", fetch: fetchFn = fetch} = options ?? {}

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

if (args.limit != null) query.append("limit", String(args.limit))
if (args.since != null) query.append("since", String(args.since))
if (args.server != null) query.append("server", String(args.server))

const url = `${baseUrl.replace(/\/+$/, '')}/_matrix/client/v3/publicRooms${query.size > 0 ? `?${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(getApiMatrixClientV3PublicRoomsResponse, await res.json())
};