import * as assert from 'assert';
import { buildPRSMessage } from '../src/adapters/sqlfluff';

suite('SqlFluff PRS Tests', () => {
  test('buildPRSMessage extracts fragment from description', () => {
    const desc = "Line 7, Position 3: Found unparsable section: 'engine=innodb default charset=utf8mb4;'";
    const msg = buildPRSMessage(desc, 'oracle');

    assert.ok(msg.includes('oracle'));
    assert.ok(msg.includes("engine=innodb default charset=utf8mb4;"));
  });

  test('buildPRSMessage flattens newlines in fragment', () => {
    const desc = "Found unparsable section: 'create table orders (\n    id int\n);'";
    const msg = buildPRSMessage(desc, 'mysql');

    assert.ok(msg.includes('\\n'));
    assert.ok(!msg.includes('\n'));
  });

  test('buildPRSMessage truncates long fragments', () => {
    const longFragment = 'x'.repeat(500);
    const desc = `Found unparsable section: '${longFragment}'`;
    const msg = buildPRSMessage(desc, 'ansi');

    assert.ok(msg.includes('...'));
    assert.ok(!msg.includes(longFragment));
  });

  test('buildPRSMessage falls back to description when pattern missing', () => {
    const desc = 'unexpected parse error output';
    const msg = buildPRSMessage(desc, 'ansi');

    assert.ok(msg.includes(desc));
  });
});