'use strict';

const test = require('node:test');
const assert = require('node:assert/strict');
const { appendMissingProductLinks, collectProductLinks } = require('../src/reply-links');

const TOOL_RESULTS = [{
  products: [
    { name: 'Triple Rings Ring', url: 'https://www.yehwang.com/triple-rings-ring-gold-color-17590.html', price: '$2.88', stock: 26 },
    { name: 'Aurora Rings Ring', url: 'https://www.yehwang.com/aurora-rings-ring-silver-color-color-17549.html', price: '$3.17', stock: 63 },
  ],
  category_links: [{ name: 'Rings', url: 'https://www.yehwang.com/jewelry/rings' }],
}];

test('reply-links: appends real product/category links as markdown', () => {
  const r = appendMissingProductLinks({ content: 'Here are some rings.', toolResults: TOOL_RESULTS, lang: 'English' });
  assert.equal(r.appended, 3);
  assert.match(r.content, /\[Triple Rings Ring\]\(https:\/\/www\.yehwang\.com\/triple-rings-ring-gold-color-17590\.html\)/);
  assert.match(r.content, /\[Rings\]\(https:\/\/www\.yehwang\.com\/jewelry\/rings\)/);
  assert.match(r.content, /Click to view:/);
  assert.match(r.content, /26 pcs/);
});

test('reply-links: skips links already written by the model', () => {
  const content = 'See https://www.yehwang.com/triple-rings-ring-gold-color-17590.html for details.';
  const r = appendMissingProductLinks({ content, toolResults: TOOL_RESULTS, lang: 'English' });
  assert.equal(r.appended, 2);
  assert.equal((r.content.match(/triple-rings-ring-gold-color-17590/g) || []).length, 1);
});

test('reply-links: respects the limit', () => {
  const r = appendMissingProductLinks({ content: 'Rings:', toolResults: TOOL_RESULTS, lang: 'English', limit: 1 });
  assert.equal(r.appended, 1);
  assert.doesNotMatch(r.content, /Aurora Rings Ring/);
});

test('reply-links: html mode emits clickable anchors', () => {
  const r = appendMissingProductLinks({ content: '<p>Rings:</p>', toolResults: TOOL_RESULTS, lang: 'Chinese', html: true });
  assert.equal(r.appended, 3);
  assert.match(r.content, /<a href="https:\/\/www\.yehwang\.com\/triple-rings-ring-gold-color-17590\.html"/);
  assert.match(r.content, /可直接查看：/);
  assert.doesNotMatch(r.content, /\[Triple Rings Ring\]\(/);
});

test('reply-links: does not backfill when the reply already says there is no match', () => {
  const r = appendMissingProductLinks({ content: 'No exact matches found.', toolResults: TOOL_RESULTS, lang: 'English' });
  assert.equal(r.appended, 0);
  assert.equal(r.content, 'No exact matches found.');
});

test('reply-links: collects only http(s) urls and dedupes', () => {
  const links = collectProductLinks([
    { products: [{ name: 'A', url: 'https://a.example/1' }, { name: 'B', url: 'https://a.example/1' }] },
    { category_links: [{ name: 'C', url: 'https://c.example/2' }, { name: 'bad', url: '/relative/3' }] },
  ]);
  assert.deepEqual(links.map((l) => l.url), ['https://a.example/1', 'https://c.example/2']);
});

test('reply-links: prefers in-stock products over out-of-stock ones', () => {
  const toolResults = [{ products: [
    { name: 'Out', url: 'https://a.example/out', price: '$1.00', stock: 0 },
    { name: 'In', url: 'https://a.example/in', price: '$2.00', stock: 26 },
    { name: 'Backorder', url: 'https://a.example/bo', price: '$3.00', stock: 0 },
  ] }];
  const r = appendMissingProductLinks({ content: 'Rings:', toolResults, lang: 'English', limit: 2 });
  assert.equal(r.appended, 2);
  assert.match(r.content, /\[In\]\(https:\/\/a\.example\/in\)/);
  assert.ok(r.content.indexOf('a.example/in') < r.content.indexOf('a.example/out'), 'in-stock link comes first');
});