import { test } from 'node:test';
import assert from 'node:assert/strict';

// Test the markdown fence stripping logic in isolation —
// we don't instantiate LLMAnalyst (requires Anthropic SDK + API key).
// The regex is: raw.replace(/^```(?:json)?\s*/i, '').replace(/```\s*$/i, '').trim()

function stripFences(raw) {
  return raw
    .replace(/^```(?:json)?\s*/i, '')
    .replace(/```\s*$/i, '')
    .trim();
}

const VALID_JSON =
  '{"summary":"test","sentiment":"BULLISH","affectedIndustries":[],"relatedTickers":[]}';

test('stripFences: passes clean JSON through unchanged', () => {
  assert.equal(stripFences(VALID_JSON), VALID_JSON);
});

test('stripFences: strips ```json ... ``` fences', () => {
  const wrapped = '```json\n' + VALID_JSON + '\n```';
  assert.equal(stripFences(wrapped), VALID_JSON);
});

test('stripFences: strips ``` ... ``` fences (no language tag)', () => {
  const wrapped = '```\n' + VALID_JSON + '\n```';
  assert.equal(stripFences(wrapped), VALID_JSON);
});

test('stripFences: result is valid parseable JSON', () => {
  const wrapped = '```json\n' + VALID_JSON + '\n```';
  const parsed = JSON.parse(stripFences(wrapped));
  assert.equal(parsed.sentiment, 'BULLISH');
  assert.equal(parsed.summary, 'test');
});

test('stripFences: handles no trailing newline before closing fence', () => {
  const wrapped = '```json\n' + VALID_JSON + '```';
  assert.equal(stripFences(wrapped), VALID_JSON);
});

test('stripFences: case-insensitive fence tag', () => {
  const wrapped = '```JSON\n' + VALID_JSON + '\n```';
  assert.equal(stripFences(wrapped), VALID_JSON);
});