import {z} from 'zod'

export type GetApiMatrixClientV3SyncArgs = {filter?: string | undefined, since?: string | undefined, full_state?: boolean | undefined, set_presence?: ('offline' | 'online' | 'unavailable') | undefined, timeout?: number | undefined, use_state_after?: boolean | undefined};

export type GetApiMatrixClientV3SyncOptions = {baseUrl?: string | undefined, accessTokenQuery?: string | undefined, fetch?: typeof fetch | undefined};

export const getApiMatrixClientV3SyncResponse = z.object({account_data: z.object({events: z.array(z.object({content: z.object({}), type: z.string()})).optional()}).optional(), device_lists: z.object({}).optional(), device_one_time_keys_count: z.record(z.string(), z.number().int()).optional(), next_batch: z.string(), presence: z.object({events: z.array(z.object({content: z.object({}), type: z.string()})).optional()}).optional(), rooms: z.object({invite: z.object({}).optional(), join: z.object({}).optional(), knock: z.object({}).optional(), leave: z.object({}).optional()}).optional(), to_device: z.object({}).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
};

/**
 * Synchronise the client's state and receive new messages.
 * 
 * GET /_matrix/client/v3/sync
 * 
 * Also accepts auth: accessTokenBearer
 */
export const getApiMatrixClientV3Sync = async (args: GetApiMatrixClientV3SyncArgs, options?: GetApiMatrixClientV3SyncOptions) => {
const {baseUrl = "https://matrix.org", fetch: fetchFn = fetch, accessTokenQuery} = options ?? {}

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

if (args.filter != null) query.append("filter", String(args.filter))
if (args.since != null) query.append("since", String(args.since))
if (args.full_state != null) query.append("full_state", String(args.full_state))
if (args.set_presence != null) query.append("set_presence", String(args.set_presence))
if (args.timeout != null) query.append("timeout", String(args.timeout))
if (args.use_state_after != null) query.append("use_state_after", String(args.use_state_after))
if (accessTokenQuery !== undefined) query.set("access_token", accessTokenQuery)

const url = `${baseUrl.replace(/\/+$/, '')}/_matrix/client/v3/sync${query.size > 0 ? `?${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(getApiMatrixClientV3SyncResponse, await res.json())
};