// tests/lib/repo-tools.test.mjs
// lib/verification/repo-tools.mjs finds the target repo's OWN formatter,
// linter and type checker. A tool counts only when the repo configures it AND
// it is installed locally (node_modules/.bin) or on PATH; nothing is ever
// downloaded. Exit codes are mapped per tool to clean / finding / error, and an
// error is never read as clean.

import { test } from 'node:test';
import { strict as assert } from 'node:assert';
import { writeFileSync, mkdirSync, realpathSync } from 'node:fs';
import { join, dirname } from 'node:path';
import { fileURLToPath } from 'node:url';
import { makeRepo, fakeTool, tmp } from '../hooks/guard-helpers.mjs';

const HERE = dirname(fileURLToPath(import.meta.url));
const mod = await import(join(HERE, '..', '..', 'lib', 'verification', 'repo-tools.mjs'));
const { resolveRepo, detectTools, toolsForFile, runTool } = mod;

test('resolveRepo: finds the root and git dir from a file path that does not exist yet', () => {
  const repo = makeRepo('main');
  const r = resolveRepo(join(repo, 'src', 'new', 'file.js'));
  assert.equal(r.root, realpathSync(repo));
  assert.equal(r.gitDir, realpathSync(join(repo, '.git')));
});

test('resolveRepo: null outside a repository', () => {
  assert.equal(resolveRepo(tmp()), null);
});

test('detectTools: prettier counts only with config AND a local binary', () => {
  const repo = makeRepo('main');
  writeFileSync(join(repo, '.prettierrc'), '{}');
  let tools = detectTools(repo, { env: { PATH: '/nonexistent' } });
  const p = tools.find((t) => t.name === 'prettier');
  assert.ok(p && !p.available, 'configured but not installed is listed as unavailable');
  fakeTool(join(repo, 'node_modules', '.bin'), 'prettier');
  tools = detectTools(repo, { env: { PATH: '/nonexistent' } });
  assert.ok(tools.find((t) => t.name === 'prettier').available);
});

test('detectTools: a repo with nothing configured has no tools', () => {
  assert.deepEqual(detectTools(makeRepo('main'), { env: { PATH: '/nonexistent' } }), []);
});

test('detectTools: eslint and tsc (repo tier) from config + local binaries', () => {
  const repo = makeRepo('main');
  writeFileSync(join(repo, 'eslint.config.js'), 'export default [];');
  writeFileSync(join(repo, 'tsconfig.json'), '{}');
  fakeTool(join(repo, 'node_modules', '.bin'), 'eslint');
  fakeTool(join(repo, 'node_modules', '.bin'), 'tsc');
  const tools = detectTools(repo, { env: { PATH: '/nonexistent' } });
  const eslint = tools.find((t) => t.name === 'eslint');
  const tsc = tools.find((t) => t.name === 'tsc');
  assert.equal(eslint.kind, 'lint');
  assert.equal(eslint.tier, 'file');
  assert.equal(tsc.kind, 'typecheck');
  assert.equal(tsc.tier, 'repo');
});

test('detectTools: ruff from pyproject [tool.ruff] and a binary on PATH', () => {
  const repo = makeRepo('main');
  writeFileSync(join(repo, 'pyproject.toml'), '[tool.ruff]\nline-length = 100\n');
  const bin = join(tmp(), 'bin');
  fakeTool(bin, 'ruff');
  const tools = detectTools(repo, { env: { PATH: bin } });
  assert.ok(tools.some((t) => t.name === 'ruff-check' && t.available));
  assert.ok(tools.some((t) => t.name === 'ruff-format' && t.available));
});

test('toolsForFile: by extension, file tier only', () => {
  const repo = makeRepo('main');
  writeFileSync(join(repo, '.prettierrc'), '{}');
  writeFileSync(join(repo, 'tsconfig.json'), '{}');
  fakeTool(join(repo, 'node_modules', '.bin'), 'prettier');
  fakeTool(join(repo, 'node_modules', '.bin'), 'tsc');
  const tools = detectTools(repo, { env: { PATH: '/nonexistent' } });
  assert.deepEqual(toolsForFile(tools, 'src/a.ts').map((t) => t.name), ['prettier']);
  assert.deepEqual(toolsForFile(tools, 'image.png').map((t) => t.name), []);
});

test('runTool: clean, finding and error are three different answers', () => {
  const repo = makeRepo('main');
  writeFileSync(join(repo, '.prettierrc'), '{}');
  fakeTool(join(repo, 'node_modules', '.bin'), 'prettier');
  mkdirSync(join(repo, 'src'));
  writeFileSync(join(repo, 'src', 'good.js'), 'ok');
  writeFileSync(join(repo, 'src', 'bad.js'), 'BAD');
  const tool = detectTools(repo, { env: { PATH: '/nonexistent' } }).find((t) => t.name === 'prettier');
  assert.equal(runTool(tool, ['src/good.js'], { cwd: repo }).status, 'clean');
  const f = runTool(tool, ['src/bad.js'], { cwd: repo });
  assert.equal(f.status, 'finding');
  assert.match(f.output, /problem/);
  // exit 7 is neither clean nor a finding for prettier
  fakeTool(join(repo, 'node_modules', '.bin'), 'prettier', { findingExit: 7 });
  assert.equal(runTool(tool, ['src/bad.js'], { cwd: repo }).status, 'error');
});