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

const REPO = 'plugins/tea-sdlc';

async function withStub(t, overrides = {}) {
  const stub = await startStubGitea(healthyRoutes(REPO, overrides));
  t.after(() => stub.close());
  return stub;
}

const envFor = (stub) => ({ TEA_SDLC_API_BASE: stub.base, TEA_SDLC_TOKEN: 'stub-token' });

// ── 第一層：執行環境 ────────────────────────────────────────────────

test('第一層：PATH 上沒有 git 時中止，錯誤訊息指名 git', async (t) => {
  const stub = await withStub(t);

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

  assert.equal(code, 1);
  assert.equal(json.error.code, 'ENV_MISSING');
  assert.match(json.error.message, /git/);
  assert.equal(stub.requests.length, 0, '環境不通過就不該發請求');
});

test('第一層：PATH 上沒有 tea 時中止，錯誤訊息指名 tea 並給出安裝指引', async (t) => {
  const stub = await withStub(t);

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

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

// ── 第二層：Gitea 登入 ─────────────────────────────────────────────

test('第二層：token 無效時中止，訊息指向 tea login', async (t) => {
  const stub = await withStub(t, {
    'GET /api/v1/user': { status: 401, body: { message: 'unauthorized' } },
  });

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

  assert.equal(code, 1);
  assert.equal(json.error.code, 'LOGIN_INVALID');
  assert.match(json.error.message, /tea login/);
});

test('第二層：找不到任何登入資訊時中止', async (t) => {
  const { code, json } = await runScript('labels-list.js', ['--repo', REPO], {
    env: { TEA_SDLC_API_BASE: '', TEA_SDLC_TOKEN: '', TEA_SDLC_CONFIG: '/nonexistent/tea.yml' },
  });

  assert.equal(code, 1);
  assert.equal(json.error.code, 'LOGIN_INVALID');
});

// ── 第三層：issues unit 寫入權 ─────────────────────────────────────

test('第三層：repo 不存在或讀不到時，錯誤碼與權限問題分得開', async (t) => {
  const stub = await withStub(t, {
    [`GET /api/v1/repos/${REPO}`]: { status: 404, body: { message: 'not found' } },
  });

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

  assert.equal(code, 1);
  assert.equal(json.error.code, 'REPO_NOT_FOUND');
});

test('第三層：repo 關閉議題功能時中止，訊息指出開啟位置', async (t) => {
  const stub = await withStub(t, {
    [`GET /api/v1/repos/${REPO}`]: {
      status: 200,
      body: {
        has_issues: false,
        permissions: { admin: false, push: true, pull: true },
        internal_tracker: { enable_time_tracker: true },
      },
    },
  });

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

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

test('第三層：對 issues unit 實測寫入權，被擋下時中止', async (t) => {
  const stub = await withStub(t, {
    [`PATCH /api/v1/repos/${REPO}/issues/0`]: { status: 403, body: { message: 'forbidden' } },
  });

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

  assert.equal(code, 1);
  assert.equal(json.error.code, 'NO_ISSUE_WRITE');
  assert.match(json.error.message, /issues/i);
});

test('第三層：不能只看 permissions.push——push 為真但 issues unit 被擋，仍須失敗', async (t) => {
  const stub = await withStub(t, {
    [`GET /api/v1/repos/${REPO}`]: {
      status: 200,
      body: {
        has_issues: true,
        // team 的 unit 權限可獨立於 repo 的 push 權限，所以這裡是真的也不算數
        permissions: { admin: false, push: true, pull: true },
        internal_tracker: { enable_time_tracker: true },
      },
    },
    [`PATCH /api/v1/repos/${REPO}/issues/0`]: { status: 403, body: { message: 'forbidden' } },
  });

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

  assert.equal(json.error.code, 'NO_ISSUE_WRITE');
});

test('第三層：探針打在不存在的議題 index 0，確保無副作用', async (t) => {
  const stub = await withStub(t);

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

  const probes = stub.requests.filter((r) => r.method === 'PATCH');
  assert.equal(probes.length, 1);
  assert.equal(probes[0].path, `/api/v1/repos/${REPO}/issues/0`);
  assert.deepEqual(probes[0].body, {}, '探針不得挾帶任何要寫入的欄位');
});

// ── 第四層：時間追蹤 ───────────────────────────────────────────────

test('第四層：時間追蹤未開啟時中止，訊息指出 Enable Time Tracker 的位置', async (t) => {
  const stub = await withStub(t, {
    [`GET /api/v1/repos/${REPO}`]: {
      status: 200,
      body: {
        has_issues: true,
        permissions: { admin: false, push: true, pull: true },
        internal_tracker: { enable_time_tracker: false },
      },
    },
  });

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

  assert.equal(code, 1);
  assert.equal(json.error.code, 'TIME_TRACKER_OFF');
  assert.match(json.error.message, /Settings → Advanced Settings → Enable Time Tracker/);
});

// ── 四層之間 ───────────────────────────────────────────────────────

test('四層的錯誤碼兩兩相異，呼叫端分得出是哪一層壞了', async (t) => {
  const cases = [
    {
      code: 'ENV_MISSING',
      run: async () => {
        const stub = await withStub(t);
        return runScript('labels-list.js', ['--repo', REPO], {
          env: envFor(stub),
          path: pathWithOnly(['git']),
        });
      },
    },
    {
      code: 'LOGIN_INVALID',
      run: async () => {
        const stub = await withStub(t, {
          'GET /api/v1/user': { status: 401, body: {} },
        });
        return runScript('labels-list.js', ['--repo', REPO], { env: envFor(stub) });
      },
    },
    {
      code: 'NO_ISSUE_WRITE',
      run: async () => {
        const stub = await withStub(t, {
          [`PATCH /api/v1/repos/${REPO}/issues/0`]: { status: 403, body: {} },
        });
        return runScript('labels-list.js', ['--repo', REPO], { env: envFor(stub) });
      },
    },
    {
      code: 'TIME_TRACKER_OFF',
      run: async () => {
        const stub = await withStub(t, {
          [`GET /api/v1/repos/${REPO}`]: {
            status: 200,
            body: {
              has_issues: true,
              permissions: { admin: true, push: true, pull: true },
              internal_tracker: { enable_time_tracker: false },
            },
          },
        });
        return runScript('labels-list.js', ['--repo', REPO], { env: envFor(stub) });
      },
    },
  ];

  const seen = [];
  for (const { code, run } of cases) {
    const { json } = await run();
    assert.equal(json.error.code, code);
    seen.push(json.error.code);
  }
  assert.equal(new Set(seen).size, seen.length);
});

test('前一層失敗就停手，不會再往下打', async (t) => {
  const stub = await withStub(t, {
    'GET /api/v1/user': { status: 401, body: {} },
  });

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

  assert.deepEqual(
    stub.requests.map((r) => r.path),
    ['/api/v1/user'],
    '登入檢查沒過就不該再查 repo 或標籤',
  );
});