import { test } from 'node:test';
import assert from 'node:assert/strict';
import { cleanEmailBody, normalizeChatwootWebhook } from '../src/domain/messageNormalizer.js';
import {
  bounceMessage,
  incomingEmailMessage,
  missingConversationId,
  noLabelsPayload,
  outgoingMessage,
  privateNote,
  statusUpdate,
} from './fixtures/chatwoot.js';

test('accepts an incoming e-mail message', () => {
  const result = normalizeChatwootWebhook(incomingEmailMessage);
  assert.ok(result.ok);
  assert.equal(result.event.conversationId, 1311);
  assert.equal(result.event.messageId, '90210');
  assert.equal(result.event.senderEmail, 'jan.kowalski@example.com');
  assert.equal(result.event.senderName, 'Jan Kowalski');
  assert.equal(result.event.channel, 'email');
  assert.equal(result.event.subject, 'Pytanie o klimatyzację');
  assert.equal(result.event.needsConversationFetch, false);
});

test('rejects outgoing messages', () => {
  const result = normalizeChatwootWebhook(outgoingMessage);
  assert.equal(result.ok, false);
  assert.match((result as { reason: string }).reason, /not_incoming/);
});

test('rejects private notes', () => {
  const result = normalizeChatwootWebhook(privateNote);
  assert.equal(result.ok, false);
  assert.equal((result as { reason: string }).reason, 'private_note');
});

test('rejects non message_created events', () => {
  const result = normalizeChatwootWebhook(statusUpdate);
  assert.equal(result.ok, false);
  assert.match((result as { reason: string }).reason, /unsupported_event/);
});

test('rejects payloads without a conversation id', () => {
  const result = normalizeChatwootWebhook(missingConversationId);
  assert.equal(result.ok, false);
  assert.equal((result as { reason: string }).reason, 'missing_conversation_id');
});

test('flags payloads that need a conversation fetch', () => {
  const result = normalizeChatwootWebhook(noLabelsPayload);
  assert.ok(result.ok);
  assert.equal(result.event.needsConversationFetch, true);
});

test('derives a stable surrogate id when the payload has no message id', () => {
  const { id, ...withoutId } = incomingEmailMessage;
  void id;
  const a = normalizeChatwootWebhook(withoutId);
  const b = normalizeChatwootWebhook(withoutId);
  assert.ok(a.ok && b.ok);
  assert.match(a.event.messageId, /^hash:1311:[0-9a-f]{32}$/);
  assert.equal(a.event.messageId, b.event.messageId);
});

test('a different body yields a different surrogate id', () => {
  const { id, ...withoutId } = incomingEmailMessage;
  void id;
  const a = normalizeChatwootWebhook(withoutId);
  const b = normalizeChatwootWebhook({ ...withoutId, content: 'inna treść' });
  assert.ok(a.ok && b.ok);
  assert.notEqual(a.event.messageId, b.event.messageId);
});

test('bounce payloads still normalise (the spam gate decides, not the parser)', () => {
  const result = normalizeChatwootWebhook(bounceMessage);
  assert.ok(result.ok);
  assert.equal(result.event.senderEmail, 'mailer-daemon@example.com');
});

test('cleanEmailBody strips quoted replies and signatures', () => {
  const raw = [
    'Dzień dobry, mam pytanie o zamówienie.',
    '',
    'W dniu 2026-08-19 Jan Kowalski napisał:',
    '> poprzednia wiadomość',
    '> druga linia cytatu',
  ].join('\n');
  assert.equal(cleanEmailBody(raw), 'Dzień dobry, mam pytanie o zamówienie.');
});

test('cleanEmailBody converts HTML e-mails to text', () => {
  const raw = '<p>Witam,<br>czy produkt jest dostępny?</p><style>p{color:red}</style>';
  const cleaned = cleanEmailBody(raw);
  assert.match(cleaned, /Witam/);
  assert.match(cleaned, /czy produkt jest dostępny\?/);
  assert.ok(!cleaned.includes('<'));
  assert.ok(!cleaned.includes('color:red'));
});