/**
 * portal-auth P4 測試（design §5/§6，Gitea #24/#25）
 *
 * 覆蓋（=tasks.md P4＋總管派工驗收重點）：
 *   1. **最後一個 active admin 鎖死保護**：停用 → 409；降級 role=user → 409；
 *      「還有另一個 active admin」才放行；另一個 admin 是 disabled 不算數。
 *   2. 一次性密碼：新增未帶密碼 → generated_password 只在回應出現一次、明碼不落 KBDB
 *      （庫裡只有 pbkdf2 hash）；自帶密碼 → 回應無 generated_password。
 *   3. reset-password：回一次性新密碼；PATCH 進 KBDB 的是 hash 非明碼。
 *   4. 庫權限：PATCH libraries=["*"]（全庫）合法；空陣列/壞庫名 → 400。
 *   5. 庫目錄：POST 建庫寫 {tenant}::portal 子 namespace；PATCH graph_source boolean。
 *   6. /portal HTML 殼（P4 admin 頁）：admin view 存在；**仍零租戶字串、零 /kbdb/、
 *      零 X-Arcrun-API-Key**（P3 紅線在新增 admin UI 後不得回退）。
 *
 * KBDB 打 fetchMock 假 host（wrangler.test.toml KBDB_BASE_URL=https://kbdb.test）＋
 * disableNetConnect——絕不外連。UI 全流程由本機隔離雙 worker 端到端 curl 驗證（PR 證據表）。
 */
import { SELF, env, fetchMock } from 'cloudflare:test';
import { beforeAll, afterEach, describe, it, expect } from 'vitest';
import { hashPassword, PBKDF2_ITERATIONS } from '../src/lib/portal-auth';

const KBDB = 'https://kbdb.test';
const NS = 'leo::portal'; // wrangler.test.toml CONSOLE_TENANT=leo → 子 namespace

let storedHash: string;

beforeAll(async () => {
  fetchMock.activate();
  fetchMock.disableNetConnect();
  storedHash = await hashPassword('unit-test-pw-1', 10_000);
});
afterEach(() => fetchMock.assertNoPendingInterceptors());

function json(method: string, path: string, body?: unknown, headers: Record<string, string> = {}) {
  return SELF.fetch(`http://localhost${path}`, {
    method,
    headers: { 'Content-Type': 'application/json', ...headers },
    body: body === undefined ? undefined : JSON.stringify(body),
  });
}

function mockHeadLookup(email: string, recordId: string | null) {
  const needle = new URLSearchParams({ page_name: email }).toString();
  fetchMock
    .get(KBDB)
    .intercept({
      path: (p: string) =>
        p.startsWith('/entries?') && p.includes(needle) && p.includes(encodeURIComponent(NS)),
      method: 'GET',
    })
    .reply(200, { success: true, entries: recordId ? [{ content: recordId }] : [], count: recordId ? 1 : 0 });
}

function mockGetRecord(recordId: string, values: Record<string, string>) {
  fetchMock
    .get(KBDB)
    .intercept({ path: `/records/${recordId}`, method: 'GET' })
    .reply(200, { success: true, record: { record_id: recordId, template_id: 'tpl_pu', values } });
}

function mockListByTemplate(template: string, records: { record_id: string; values: Record<string, string> }[]) {
  fetchMock
    .get(KBDB)
    .intercept({ path: (p: string) => p.startsWith(`/records/by-template/${template}`), method: 'GET' })
    .reply(200, { success: true, records: records.map((r) => ({ ...r, template_id: 'tpl' })), count: records.length });
}

function mockTemplatesExist() {
  for (const name of ['portal_user', 'portal_library']) {
    fetchMock
      .get(KBDB)
      .intercept({ path: `/templates/${name}`, method: 'GET' })
      .reply(200, { success: true, template: { id: `tpl-${name}`, name } });
  }
}

function adminValues(overrides: Record<string, string> = {}): Record<string, string> {
  return {
    email: 'admin@example.com',
    display_name: '管理員',
    status: 'active',
    role: 'admin',
    password_hash: storedHash,
    libraries: '["*"]',
    created_at: '2026-07-14T00:00:00.000Z',
    updated_at: '2026-07-14T00:00:00.000Z',
    ...overrides,
  };
}

function userValues(overrides: Record<string, string> = {}): Record<string, string> {
  return adminValues({ email: 'user@example.com', display_name: '同仁', role: 'user', libraries: '["general"]', ...overrides });
}

async function seedAdminSession(token = 'tok-admin', recordId = 'rec_admin') {
  await env.SESSIONS_KV.put(`portal_sess:${token}`, JSON.stringify({ record_id: recordId }));
}

/** PATCH /portal/admin/users/:id 的共通 mock 前奏：admin session 回讀＋目標 record 成員驗證。 */
function mockPatchPrelude(targetId: string, targetValues: Record<string, string>) {
  mockGetRecord('rec_admin', adminValues()); // requirePortalAdmin 回讀
  mockGetRecord(targetId, targetValues); // assertPortalUserRecord 回讀目標
  mockHeadLookup(targetValues.email, targetId); // head 指回同 record → 成員資格成立
}

// ═══════════════ 1. 最後一個 active admin 鎖死保護 ═══════════════

describe('last-admin 鎖死保護（PATCH /portal/admin/users/:id）', () => {
  it('停用最後一個 active admin → 409，不發 PATCH', async () => {
    await seedAdminSession();
    mockPatchPrelude('rec_admin2', adminValues({ email: 'admin2@example.com' }));
    // guard 查全列表：只有目標自己是 active admin（另一人是一般 user）
    mockListByTemplate('portal_user', [
      { record_id: 'rec_admin2', values: adminValues({ email: 'admin2@example.com' }) },
      { record_id: 'rec_u1', values: userValues() },
    ]);
    const res = await json('PATCH', '/portal/admin/users/rec_admin2', { status: 'disabled' }, { Authorization: 'Bearer tok-admin' });
    expect(res.status).toBe(409);
    const data = (await res.json()) as { error: string };
    expect(data.error).toContain('最後一個管理員');
  });

  it('降級最後一個 active admin（role=user）→ 409', async () => {
    await seedAdminSession();
    mockPatchPrelude('rec_admin2', adminValues({ email: 'admin2@example.com' }));
    mockListByTemplate('portal_user', [
      { record_id: 'rec_admin2', values: adminValues({ email: 'admin2@example.com' }) },
    ]);
    const res = await json('PATCH', '/portal/admin/users/rec_admin2', { role: 'user' }, { Authorization: 'Bearer tok-admin' });
    expect(res.status).toBe(409);
  });

  it('「另一個 admin 是 disabled」不算數 → 仍 409', async () => {
    await seedAdminSession();
    mockPatchPrelude('rec_admin2', adminValues({ email: 'admin2@example.com' }));
    mockListByTemplate('portal_user', [
      { record_id: 'rec_admin2', values: adminValues({ email: 'admin2@example.com' }) },
      { record_id: 'rec_admin3', values: adminValues({ email: 'admin3@example.com', status: 'disabled' }) },
    ]);
    const res = await json('PATCH', '/portal/admin/users/rec_admin2', { status: 'disabled' }, { Authorization: 'Bearer tok-admin' });
    expect(res.status).toBe(409);
  });

  it('還有另一個 active admin → 停用放行（200）', async () => {
    await seedAdminSession();
    mockPatchPrelude('rec_admin2', adminValues({ email: 'admin2@example.com' }));
    mockListByTemplate('portal_user', [
      { record_id: 'rec_admin2', values: adminValues({ email: 'admin2@example.com' }) },
      { record_id: 'rec_admin', values: adminValues() }, // 操作者自己也是 active admin
    ]);
    fetchMock
      .get(KBDB)
      .intercept({ path: '/records/rec_admin2', method: 'PATCH' })
      .reply(200, {
        success: true,
        record: { record_id: 'rec_admin2', template_id: 'tpl_pu', values: adminValues({ email: 'admin2@example.com', status: 'disabled' }) },
      });
    const res = await json('PATCH', '/portal/admin/users/rec_admin2', { status: 'disabled' }, { Authorization: 'Bearer tok-admin' });
    expect(res.status).toBe(200);
  });

  it('停用一般 user 不觸發 admin 列表檢查（無 by-template mock 也過＝機械證明沒多打）', async () => {
    await seedAdminSession();
    mockPatchPrelude('rec_u1', userValues());
    fetchMock
      .get(KBDB)
      .intercept({ path: '/records/rec_u1', method: 'PATCH' })
      .reply(200, {
        success: true,
        record: { record_id: 'rec_u1', template_id: 'tpl_pu', values: userValues({ status: 'disabled' }) },
      });
    const res = await json('PATCH', '/portal/admin/users/rec_u1', { status: 'disabled' }, { Authorization: 'Bearer tok-admin' });
    expect(res.status).toBe(200); // afterEach assertNoPendingInterceptors ＝ 沒有殘留 list mock
  });
});

// ═══════════════ 2. 一次性密碼（新增帳號）═══════════════

describe('POST /portal/admin/users（一次性密碼）', () => {
  it('未帶 password → generated_password 回一次（16 碼）；KBDB 落的是 hash 非明碼', async () => {
    await seedAdminSession();
    mockGetRecord('rec_admin', adminValues());
    mockHeadLookup('new@example.com', null); // email 未占用
    let recordBody = '';
    fetchMock
      .get(KBDB)
      .intercept({ path: '/records', method: 'POST' })
      .reply(200, (opts) => {
        recordBody = String(opts.body);
        return { success: true, record: { record_id: 'rec_new', template_id: 'tpl_pu', values: {} } };
      });
    fetchMock
      .get(KBDB)
      .intercept({ path: '/entries', method: 'POST' })
      .reply(200, { success: true, entry: { id: 'e_head' } });
    mockGetRecord('rec_new', userValues({ email: 'new@example.com' })); // 回應用的回讀
    const res = await json(
      'POST',
      '/portal/admin/users',
      { email: 'new@example.com', display_name: '新同仁', libraries: ['general'] },
      { Authorization: 'Bearer tok-admin' },
    );
    expect(res.status).toBe(200);
    const data = (await res.json()) as { generated_password?: string; user: Record<string, unknown> };
    expect(typeof data.generated_password).toBe('string');
    expect(data.generated_password!.length).toBe(16);
    expect('password_hash' in data.user).toBe(false);
    // 一次性密碼不落庫：KBDB 收到的 record body 只有 hash、無明碼
    expect(recordBody).not.toContain(data.generated_password!);
    const rec = JSON.parse(recordBody) as { owner_id: string; values: Record<string, string> };
    expect(rec.owner_id).toBe(NS);
    expect(rec.values.password_hash.startsWith(`pbkdf2-sha256$${PBKDF2_ITERATIONS}$`)).toBe(true);
  });

  it('自帶 password → 回應**無** generated_password', async () => {
    await seedAdminSession();
    mockGetRecord('rec_admin', adminValues());
    mockHeadLookup('own@example.com', null);
    fetchMock
      .get(KBDB)
      .intercept({ path: '/records', method: 'POST' })
      .reply(200, { success: true, record: { record_id: 'rec_own', template_id: 'tpl_pu', values: {} } });
    fetchMock
      .get(KBDB)
      .intercept({ path: '/entries', method: 'POST' })
      .reply(200, { success: true, entry: { id: 'e_head2' } });
    mockGetRecord('rec_own', userValues({ email: 'own@example.com' }));
    const res = await json(
      'POST',
      '/portal/admin/users',
      { email: 'own@example.com', password: 'self-chosen-pw-1' },
      { Authorization: 'Bearer tok-admin' },
    );
    expect(res.status).toBe(200);
    const data = (await res.json()) as Record<string, unknown>;
    expect('generated_password' in data).toBe(false);
  });
});

// ═══════════════ 3. reset-password ═══════════════

describe('POST /portal/admin/users/:id/reset-password', () => {
  it('回一次性新密碼；PATCH 落 KBDB 的是新 hash 非明碼', async () => {
    await seedAdminSession();
    mockPatchPrelude('rec_u1', userValues());
    let patched = '';
    fetchMock
      .get(KBDB)
      .intercept({ path: '/records/rec_u1', method: 'PATCH' })
      .reply(200, (opts) => {
        patched = String(opts.body);
        return { success: true, record: { record_id: 'rec_u1', template_id: 'tpl_pu', values: userValues() } };
      });
    const res = await json('POST', '/portal/admin/users/rec_u1/reset-password', undefined, { Authorization: 'Bearer tok-admin' });
    expect(res.status).toBe(200);
    const data = (await res.json()) as { password: string };
    expect(typeof data.password).toBe('string');
    expect(data.password.length).toBe(16);
    expect(patched).not.toContain(data.password); // 明碼不落 KBDB
    const sent = JSON.parse(patched) as { values: Record<string, string> };
    expect(sent.values.password_hash.startsWith(`pbkdf2-sha256$${PBKDF2_ITERATIONS}$`)).toBe(true);
    expect(sent.values.password_hash).not.toBe(storedHash); // 真的換了
  });
});

// ═══════════════ 4. 庫權限勾選（libraries PATCH）═══════════════

describe('PATCH libraries（每帳號可查庫）', () => {
  it('["*"]（全庫選項）合法，存成 JSON 字串', async () => {
    await seedAdminSession();
    mockPatchPrelude('rec_u1', userValues());
    let patched = '';
    fetchMock
      .get(KBDB)
      .intercept({ path: '/records/rec_u1', method: 'PATCH' })
      .reply(200, (opts) => {
        patched = String(opts.body);
        return { success: true, record: { record_id: 'rec_u1', template_id: 'tpl_pu', values: userValues({ libraries: '["*"]' }) } };
      });
    const res = await json('PATCH', '/portal/admin/users/rec_u1', { libraries: ['*'] }, { Authorization: 'Bearer tok-admin' });
    expect(res.status).toBe(200);
    expect((JSON.parse(patched) as { values: Record<string, string> }).values.libraries).toBe('["*"]');
  });

  it('空陣列 / 壞庫名（含逗號）→ 400 不 PATCH', async () => {
    await seedAdminSession();
    mockPatchPrelude('rec_u1', userValues());
    const res = await json('PATCH', '/portal/admin/users/rec_u1', { libraries: [] }, { Authorization: 'Bearer tok-admin' });
    expect(res.status).toBe(400);

    await seedAdminSession('tok-admin2');
    mockGetRecord('rec_admin', adminValues());
    mockGetRecord('rec_u1', userValues());
    mockHeadLookup('user@example.com', 'rec_u1');
    const res2 = await json('PATCH', '/portal/admin/users/rec_u1', { libraries: ['a,b'] }, { Authorization: 'Bearer tok-admin2' });
    expect(res2.status).toBe(400);
  });
});

// ═══════════════ 5. 庫目錄管理 ═══════════════

describe('/portal/admin/libraries', () => {
  it('POST 建庫：寫 {tenant}::portal 子 namespace；重複登記 → 409', async () => {
    await seedAdminSession();
    mockGetRecord('rec_admin', adminValues());
    mockTemplatesExist();
    mockListByTemplate('portal_library', []);
    let recordBody = '';
    fetchMock
      .get(KBDB)
      .intercept({ path: '/records', method: 'POST' })
      .reply(200, (opts) => {
        recordBody = String(opts.body);
        return {
          success: true,
          record: { record_id: 'rec_lib1', template_id: 'tpl_pl', values: { name: 'finance', display_name: '財務庫', status: 'active' } },
        };
      });
    const res = await json(
      'POST',
      '/portal/admin/libraries',
      { name: 'finance', display_name: '財務庫' },
      { Authorization: 'Bearer tok-admin' },
    );
    expect(res.status).toBe(200);
    const rec = JSON.parse(recordBody) as { owner_id: string; template: string };
    expect(rec.owner_id).toBe(NS);
    expect(rec.template).toBe('portal_library');

    // 重複登記
    await seedAdminSession('tok-admin3');
    mockGetRecord('rec_admin', adminValues());
    mockTemplatesExist();
    mockListByTemplate('portal_library', [
      { record_id: 'rec_lib1', values: { name: 'finance', display_name: '財務庫', status: 'active' } },
    ]);
    const dup = await json('POST', '/portal/admin/libraries', { name: 'finance' }, { Authorization: 'Bearer tok-admin3' });
    expect(dup.status).toBe(409);
  });

  it('PATCH graph_source：boolean 進、slot 存字串；非 boolean → 400', async () => {
    await seedAdminSession();
    mockGetRecord('rec_admin', adminValues());
    mockListByTemplate('portal_library', [
      { record_id: 'rec_lib1', values: { name: 'finance', display_name: '財務庫', status: 'active' } },
    ]);
    let patched = '';
    fetchMock
      .get(KBDB)
      .intercept({ path: '/records/rec_lib1', method: 'PATCH' })
      .reply(200, (opts) => {
        patched = String(opts.body);
        return {
          success: true,
          record: { record_id: 'rec_lib1', template_id: 'tpl_pl', values: { name: 'finance', status: 'active', graph_source: 'true' } },
        };
      });
    const res = await json('PATCH', '/portal/admin/libraries/rec_lib1', { graph_source: true }, { Authorization: 'Bearer tok-admin' });
    expect(res.status).toBe(200);
    expect((JSON.parse(patched) as { values: Record<string, string> }).values.graph_source).toBe('true');
    const data = (await res.json()) as { library: { graph_source: boolean } };
    expect(data.library.graph_source).toBe(true);

    await seedAdminSession('tok-admin4');
    mockGetRecord('rec_admin', adminValues());
    mockListByTemplate('portal_library', [
      { record_id: 'rec_lib1', values: { name: 'finance', status: 'active' } },
    ]);
    const bad = await json('PATCH', '/portal/admin/libraries/rec_lib1', { graph_source: 'yes' }, { Authorization: 'Bearer tok-admin4' });
    expect(bad.status).toBe(400);
  });

  it('一般 user 打庫目錄 → 403（role 閘）', async () => {
    await seedAdminSession('tok-user', 'rec_u1');
    mockGetRecord('rec_u1', userValues());
    const res = await json('GET', '/portal/admin/libraries', undefined, { Authorization: 'Bearer tok-user' });
    expect(res.status).toBe(403);
  });
});

// ═══════════════ 6. /portal HTML 殼（P4 admin 頁後紅線不回退）═══════════════

describe('GET /portal（P4 admin 頁 HTML 殼）', () => {
  it('admin view 存在；仍零租戶字串、零 /kbdb/、零 X-Arcrun-API-Key、零 Mira', async () => {
    const res = await SELF.fetch('http://localhost/portal');
    expect(res.status).toBe(200);
    const html = await res.text();
    expect(html).toContain('v-admin'); // P4 管理頁 view
    expect(html).toContain('/portal/admin/users'); // 帳號管理走 admin API
    expect(html).toContain('/portal/admin/libraries'); // 庫目錄管理
    // P3 紅線（design §3.3）在加了 admin UI 後不得回退
    expect(html).not.toMatch(/['"]leo['"]/);
    expect(html).not.toContain('/kbdb/');
    expect(html).not.toContain('X-Arcrun-API-Key');
    expect(html).not.toContain('Mira');
  });
});