import test from 'node:test';
import assert from 'node:assert/strict';
import { runScript } from './helpers/run-script.js';
import { startStubGitea, healthyRoutes } from './helpers/stub-gitea.js';

const REPO = 'plugins/tea-sdlc';

/** 讓每個測試都拿到一台乾淨的假 Gitea，並在結束後關掉 */
async function withStub(t, overrides = {}) {
  const stub = await startStubGitea(healthyRoutes(REPO, overrides));
  t.after(() => stub.close());
  return stub;
}

function envFor(stub) {
  return { TEA_SDLC_API_BASE: stub.base, TEA_SDLC_TOKEN: 'stub-token' };
}

test('列出目標 repo 的既有標籤，輸出單行 JSON 且 exit 0', async (t) => {
  const stub = await withStub(t);

  const { code, json, stdout } = await runScript('labels-list.js', ['--repo', REPO], {
    env: envFor(stub),
  });

  assert.equal(code, 0);
  assert.equal(json.ok, true);
  assert.deepEqual(
    json.data.labels.map((l) => l.name),
    ['ready-for-agent', '進行中'],
  );
  assert.equal(stdout.trimEnd().includes('\n'), false, '輸出必須是單行');
});

test('輸出帶上 repo 與標籤數，供下游不必再數一次', async (t) => {
  const stub = await withStub(t);

  const { json } = await runScript('labels-list.js', ['--repo', REPO], { env: envFor(stub) });

  assert.equal(json.data.repo, REPO);
  assert.equal(json.data.count, 2);
});

test('帶上 Authorization，且只對 Gitea 發出讀取請求', async (t) => {
  const stub = await withStub(t);

  await runScript('labels-list.js', ['--repo', REPO], { env: envFor(stub) });

  const labelCalls = stub.requests.filter((r) => r.path.endsWith('/labels'));
  assert.equal(labelCalls.length, 1);
  assert.equal(labelCalls[0].method, 'GET');
  assert.equal(labelCalls[0].authorization, 'token stub-token');
});

test('不具備建立標籤的能力：沒有任何請求會寫到 labels 端點', async (t) => {
  const stub = await withStub(t);

  await runScript('labels-list.js', ['--repo', REPO], { env: envFor(stub) });

  const writesToLabels = stub.requests.filter(
    (r) => r.path.endsWith('/labels') && r.method !== 'GET',
  );
  assert.deepEqual(writesToLabels, []);
});

test('不具備建立標籤的能力：看起來像要建標籤的 flag 一律被拒', async (t) => {
  const stub = await withStub(t);

  const { code, json } = await runScript(
    'labels-list.js',
    ['--repo', REPO, '--create', 'needs-triage'],
    { env: envFor(stub) },
  );

  assert.equal(code, 1);
  assert.equal(json.ok, false);
  assert.equal(json.error.code, 'UNKNOWN_FLAG');
  assert.equal(stub.requests.length, 0, '參數錯誤時不該碰 Gitea');
});

test('空標籤清單不是錯誤', async (t) => {
  const stub = await withStub(t, { [`GET /api/v1/repos/${REPO}/labels`]: { status: 200, body: [] } });

  const { code, json } = await runScript('labels-list.js', ['--repo', REPO], { env: envFor(stub) });

  assert.equal(code, 0);
  assert.deepEqual(json.data.labels, []);
  assert.equal(json.data.count, 0);
});

test('Gitea 回非預期狀態碼時，帶著狀態碼失敗而不是硬吞', async (t) => {
  const stub = await withStub(t, {
    [`GET /api/v1/repos/${REPO}/labels`]: { status: 500, body: { message: 'boom' } },
  });

  const { code, json } = await runScript('labels-list.js', ['--repo', REPO], { env: envFor(stub) });

  assert.equal(code, 1);
  assert.equal(json.error.code, 'HTTP_ERROR');
  assert.match(json.error.message, /500/);
});

test('大量標籤不會被截斷：輸出仍是完整且可解析的單行 JSON', async (t) => {
  // 回歸測試：stdout 接到 pipe 時寫入是非同步的，寫完立刻 process.exit 會截斷長輸出
  const many = Array.from({ length: 8000 }, (_, i) => ({
    id: i,
    name: `label-${i}`,
    color: 'ffffff',
    description: '為了把輸出撐大到足以觸發截斷的敘述文字'.repeat(2),
  }));
  const stub = await withStub(t, {
    [`GET /api/v1/repos/${REPO}/labels`]: { status: 200, body: many },
  });

  const { code, json } = await runScript('labels-list.js', ['--repo', REPO], { env: envFor(stub) });

  assert.equal(code, 0);
  assert.equal(json.data.count, 8000);
  assert.equal(json.data.labels.at(-1).name, 'label-7999');
});