/**
 * console-auth.ts —— D61 舊實例相容（帳密只在舊 SESSIONS_KV，尚未搬遷過）
 *
 * 拆成獨立檔案的理由：portal-auth-store.ts 的 per-isolate overlay 是模組級全域變數，
 * 一旦某個測試讓 console 帳密的認證儲存寫入成功，overlay.console 就會在**同一支測試檔案**
 * 剩下的測試裡持續存在（不同檔案＝不同 worker 執行個體，互不污染，已用小型探針驗證過）。
 * tests/console-auth.test.ts 一開始就會走一次「首次設定成功」，之後整支檔案都是「已設定」
 * 的世界；「認證儲存還是空的、帳密只活在舊 KV」這個起始狀態只有在全新檔案才測得出來。
 */
import { SELF, env, fetchMock } from 'cloudflare:test';
import { beforeAll, afterEach, describe, it, expect } from 'vitest';

const CF_API = 'https://api.cloudflare.com';
const CREDS_KEY = 'console:credentials';

beforeAll(() => {
  fetchMock.activate();
  fetchMock.disableNetConnect();
});
afterEach(() => fetchMock.assertNoPendingInterceptors());

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

function mockAuthStoreWrite(times = 1): { puts: () => Array<{ name: string; text: string }> } {
  const captured: Array<{ name: string; text: string }> = [];
  fetchMock
    .get(CF_API)
    .intercept({ path: (p: string) => p.includes('/secrets'), method: 'PUT' })
    .reply(200, (opts) => {
      const body = JSON.parse(String(opts.body)) as { name: string; text: string };
      captured.push(body);
      return { success: true };
    })
    .times(times);
  return { puts: () => captured };
}

/** 複刻 console-auth.ts 內未 export 的私有迭代雜湊（sha256(salt+password) 迭代 3 次），
 *  單純為了在測試端準備一筆能通過驗證的 legacy fixture，不是重新實作生產邏輯。 */
async function legacyHash(password: string, salt: string): Promise<string> {
  async function sha256Hex(input: string): Promise<string> {
    const digest = await crypto.subtle.digest('SHA-256', new TextEncoder().encode(input));
    return Array.from(new Uint8Array(digest)).map((b) => b.toString(16).padStart(2, '0')).join('');
  }
  let h = `${salt}:${password}`;
  for (let i = 0; i < 3; i++) h = await sha256Hex(h);
  return h;
}

const EMAIL = 'legacy-owner@example.com';
const PASSWORD = 'legacy-owner-pw-1';
const SALT = 'deadbeef00112233';

describe('D61 舊實例相容：console 帳密只在舊 KV（尚未搬遷）', () => {
  it('GET /console/auth-status：讀到舊 KV 這筆、順手搬進認證儲存', async () => {
    const hash = await legacyHash(PASSWORD, SALT);
    await env.SESSIONS_KV.put(
      CREDS_KEY,
      JSON.stringify({ email: EMAIL, salt: SALT, hash, created_at: '2026-01-01T00:00:00.000Z' }),
    );
    const { puts } = mockAuthStoreWrite();

    const res = await json('GET', '/console/auth-status');
    expect(res.status).toBe(200);
    const data = (await res.json()) as {
      configured: boolean;
      credentials_source: string;
      auth_store: { console_configured: boolean };
    };
    expect(data.configured).toBe(true);
    expect(data.credentials_source).toBe('legacy-kv'); // 這次是靠回退讀到的
    // loadCredentials 內的 best-effort 搬遷在回應組出來之前就已 await 完成，
    // 故 authStoreStatus 已經反映搬遷後的狀態
    expect(data.auth_store.console_configured).toBe(true);

    const shards = puts();
    expect(shards.length).toBe(1);
    const shard = JSON.parse(shards[0].text) as { console: { email: string; hash: string } };
    expect(shard.console.email).toBe(EMAIL);
    expect(shard.console.hash).toBe(hash); // 原樣搬過去，不重新雜湊
  });

  it('搬遷後再打一次：新家已經有了，直接命中新家（不用再查舊 KV）', async () => {
    const res = await json('GET', '/console/auth-status');
    const data = (await res.json()) as { credentials_source: string };
    expect(data.credentials_source).toBe('secrets');
  });

  it('用搬遷過去的帳密登入 → 200（搬遷沒有讓帳密變得登不進去）', async () => {
    const res = await json('POST', '/console/login', { email: EMAIL, password: PASSWORD });
    expect(res.status).toBe(200);
    const data = (await res.json()) as { success: boolean };
    expect(data.success).toBe(true);
  });
});