// The one list of messages: what the room accepts from a client, and what
// it refuses, each with its reason.

import { describe, expect, it } from 'vitest';
import { CLIENT_MESSAGE_KINDS, HOST_MESSAGE_KINDS, isTopic, parseClientMessage, parseHostMessage } from '../src/index.js';

describe("a client's messages", () => {
  it('reads each kind', () => {
    const messages = [
      { v: 1, kind: 'sub', topics: ['activity', 'trace:port-1', 'app:node-1/terminal'] },
      { v: 1, kind: 'unsub', topics: ['activity'] },
      { v: 1, kind: 'start' },
      { v: 1, kind: 'stop' },
      { v: 1, kind: 'speed', value: 50 },
      { v: 1, kind: 'input', node: 'node-1', app: 'terminal', action: 'enter', args: { line: 'ping 1.2.3.4' }, reqId: 'r1' },
    ];
    expect(messages.map((each) => each.kind)).toEqual([...CLIENT_MESSAGE_KINDS]);
    for (const each of messages) expect(parseClientMessage(each)).toEqual({ message: each });
  });

  it('names what is wrong', () => {
    const code = (value: unknown) => ('error' in parseClientMessage(value) ? (parseClientMessage(value) as { error: { code: string } }).error.code : 'ok');
    expect(code(null)).toBe('badMessage');
    expect(code([])).toBe('badMessage');
    expect(code({ v: 2, kind: 'start' })).toBe('badVersion');
    expect(code({ v: 1, kind: 'reset' })).toBe('unknownKind');
    expect(code({ v: 1, kind: 'sub', topics: 'activity' })).toBe('badMessage');
    expect(code({ v: 1, kind: 'sub', topics: ['activity', 'trace:'] })).toBe('badTopic');
    expect(code({ v: 1, kind: 'unsub', topics: ['app:node/paint'] })).toBe('badTopic');
    expect(code({ v: 1, kind: 'speed', value: '50' })).toBe('badMessage');
    expect(code({ v: 1, kind: 'speed', value: Number.NaN })).toBe('badMessage');
    expect(code({ v: 1, kind: 'input', node: 'n', app: 'terminal', action: 'enter', args: {} })).toBe('badMessage');
    expect(code({ v: 1, kind: 'input', node: 'n', app: 'terminal', action: 'enter', args: [], reqId: 'r' })).toBe('badMessage');
    expect(code({ v: 1, kind: 'input', node: 'n', app: 'paint', action: 'enter', args: {}, reqId: 'r' })).toBe('unknownApp');
  });

  it('knows its topics', () => {
    expect(['activity', 'trace:x', 'app:n/gnutella', 'app:n/webBrowser', 'node:n'].every(isTopic)).toBe(true);
    expect(['', 'trace:', 'app:/terminal', 'app:n/', 'app:n/terminal/x', 'node:', 'node:n/x', 'nodes:n', 7].some(isTopic)).toBe(false);
  });
});

describe("a host's messages", () => {
  it('reads each kind, and names an unknown one', () => {
    for (const kind of HOST_MESSAGE_KINDS) expect('message' in parseHostMessage({ v: 1, kind })).toBe(true);
    expect(parseHostMessage({ v: 1, kind: 'nodes' })).toEqual({ error: { code: 'unknownKind', detail: 'kind nodes' } });
    expect(parseHostMessage({ v: 0, kind: 'state' })).toEqual({ error: { code: 'badVersion', detail: 'version 0' } });
  });
});