import assert from 'node:assert/strict';
import { execFileSync } from 'node:child_process';
import { mkdtempSync, writeFileSync } from 'node:fs';
import { tmpdir } from 'node:os';
import path from 'node:path';
import test from 'node:test';

import { assertGeneratedContractsUnchanged } from './verify-generated-contracts.mjs';

function createGitFixture() {
  const repositoryRoot = mkdtempSync(path.join(tmpdir(), 'a-share-contracts-'));
  execFileSync('git', ['init', '-q'], { cwd: repositoryRoot });
  execFileSync('git', ['config', 'user.name', 'Contract Test'], { cwd: repositoryRoot });
  execFileSync('git', ['config', 'user.email', 'contract-test@example.invalid'], {
    cwd: repositoryRoot,
  });
  writeFileSync(path.join(repositoryRoot, 'contract.json'), '{"version":1}\n');
  execFileSync('git', ['add', 'contract.json'], { cwd: repositoryRoot });
  execFileSync('git', ['commit', '-qm', '测试基线'], { cwd: repositoryRoot });
  return repositoryRoot;
}

test('生成契约与提交版本一致时通过', () => {
  const repositoryRoot = createGitFixture();
  assert.doesNotThrow(() => assertGeneratedContractsUnchanged(repositoryRoot, ['contract.json']));
});

test('生成契约发生漂移时以明确错误阻断', () => {
  const repositoryRoot = createGitFixture();
  writeFileSync(path.join(repositoryRoot, 'contract.json'), '{"version":2}\n');

  assert.throws(
    () => assertGeneratedContractsUnchanged(repositoryRoot, ['contract.json']),
    /生成契约与 Git 提交版本不一致：contract\.json/,
  );
});

test('生成文件未纳入 Git 跟踪时阻断', () => {
  const repositoryRoot = createGitFixture();
  writeFileSync(path.join(repositoryRoot, 'untracked-contract.json'), '{"version":1}\n');

  assert.throws(
    () => assertGeneratedContractsUnchanged(repositoryRoot, ['untracked-contract.json']),
    /生成契约未纳入 Git 跟踪：untracked-contract\.json/,
  );
});