import { describe, it } from 'node:test';
import assert from 'node:assert/strict';
import { resolve } from 'node:path';
import { fileURLToPath } from 'node:url';
import { execFile } from 'node:child_process';
import { promisify } from 'node:util';
import { readFile, unlink } from 'node:fs/promises';

const exec = promisify(execFile);
const __dirname = fileURLToPath(new URL('.', import.meta.url));
const REPO = resolve(__dirname, '../..');
const CLI = resolve(REPO, 'scanners/token-hotspots-cli.mjs');
const ORCH = resolve(REPO, 'scanners/scan-orchestrator.mjs');
const FIXTURE = resolve(REPO, 'tests/fixtures/marketplace-large');

describe('token-hotspots-cli', () => {
  it('returns valid JSON with hotspots.length >= 3', async () => {
    const { stdout } = await exec('node', [CLI, FIXTURE, '--json'], {
      timeout: 30000,
      cwd: REPO,
    });
    const json = JSON.parse(stdout);
    assert.equal(json.scanner, 'TOK');
    assert.ok(Array.isArray(json.hotspots), 'hotspots must be an array');
    assert.ok(json.hotspots.length >= 3, `expected ≥3 hotspots, got ${json.hotspots.length}`);
    assert.equal(typeof json.total_estimated_tokens, 'number');
    assert.ok(json.total_estimated_tokens > 0, 'expected non-zero token estimate');
  });

  it('writes JSON to --output-file when provided', async () => {
    const out = `/tmp/tok-cli-${process.pid}-${Date.now()}.json`;
    try {
      await exec('node', [CLI, FIXTURE, '--output-file', out], {
        timeout: 30000,
        cwd: REPO,
      });
      const written = await readFile(out, 'utf-8');
      const json = JSON.parse(written);
      assert.equal(json.scanner, 'TOK');
      assert.ok(json.hotspots.length >= 3);
    } finally {
      await unlink(out).catch(() => {});
    }
  });

  it('omits telemetry_recipe_path when --with-telemetry-recipe is absent', async () => {
    const { stdout } = await exec('node', [CLI, FIXTURE, '--json'], {
      timeout: 30000,
      cwd: REPO,
    });
    const json = JSON.parse(stdout);
    assert.equal(json.telemetry_recipe_path, undefined,
      'telemetry_recipe_path must NOT appear without the flag');
  });

  it('includes telemetry_recipe_path when --with-telemetry-recipe is passed', async () => {
    const { stdout } = await exec('node', [CLI, FIXTURE, '--json', '--with-telemetry-recipe'], {
      timeout: 30000,
      cwd: REPO,
    });
    const json = JSON.parse(stdout);
    assert.equal(typeof json.telemetry_recipe_path, 'string');
    assert.ok(json.telemetry_recipe_path.length > 0, 'expected non-empty path');
    assert.ok(
      json.telemetry_recipe_path.endsWith('cache-telemetry-recipe.md'),
      `expected path to end with cache-telemetry-recipe.md, got ${json.telemetry_recipe_path}`
    );
  });
});

describe('scan-orchestrator integration — TOK hotspots survive envelope', () => {
  it('envelope.scanners contains TOK with hotspots field', async () => {
    const out = `/tmp/tok-orch-${process.pid}-${Date.now()}.json`;
    try {
      await exec('node', [ORCH, FIXTURE, '--output-file', out], {
        timeout: 60000,
        cwd: REPO,
      });
      const written = await readFile(out, 'utf-8');
      const envelope = JSON.parse(written);
      const tok = envelope.scanners.find(s => s.scanner === 'TOK');
      assert.ok(tok, 'expected TOK scanner result in envelope.scanners');
      assert.ok(Array.isArray(tok.hotspots), 'TOK result must carry hotspots through the envelope');
      assert.ok(tok.hotspots.length > 0, 'expected hotspots to survive into final envelope');
      assert.equal(typeof tok.total_estimated_tokens, 'number');
    } finally {
      await unlink(out).catch(() => {});
    }
  });
});
