/**
 * 账号绑定与登录态用例（任务 A5.7 / ADR-0012）。
 *
 * 用一个「会过期的业务系统」当靶子：登录换 token、token 能被作废、作废后必须 401。
 * 要证明的四件事：密码不落盘、token 只以密文存在、失效后调用被拒且不再拿旧凭据去撞、重新绑定能恢复。
 */
import assert from 'node:assert/strict';
import { createServer } from 'node:http';
import { mkdtempSync, readFileSync, rmSync } from 'node:fs';
import { tmpdir } from 'node:os';
import { join } from 'node:path';
import { test } from 'node:test';

const subject = { userId: 'u-bind', tenantId: 't-bind', displayName: '张工', clientKind: 'browser' };
const headers = (who = subject) => ({ 'content-type': 'application/json', 'x-aps-user': who.userId, 'x-aps-tenant': who.tenantId });

/** 业务系统桩：账号密码换 token，token 可被作废，能力调用校验 Bearer */
async function startStubSystem() {
  const validTokens = new Set();
  const calls = [];
  const server = createServer((req, res) => {
    const url = new URL(req.url ?? '/', 'http://localhost');
    const json = (status, body) => res.writeHead(status, { 'content-type': 'application/json' }).end(JSON.stringify(body));
    const bearer = (req.headers.authorization ?? '').replace(/^Bearer\s+/i, '');
    if (url.pathname === '/__invalidate') {
      validTokens.clear();
      json(200, { invalidated: true });
      return;
    }
    if (url.pathname === '/api/health') return json(200, { status: 'ok' });
    if (url.pathname === '/api/manifest') {
      return json(200, {
        id: 'aps',
        displayName: '桩 APS',
        version: '1.0.0',
        platformVersion: 1,
        requiresIdentity: true,
        auth: { kind: 'password-exchange' },
        capabilities: [
          {
            id: 'aps.orders.query',
            title: '订单查询',
            description: '查销售订单与交期状态',
            effect: 'read',
            mode: 'sync',
            whenNotToUse: '要排产用 aps.schedule.preview',
            synonyms: ['订单'],
            inputSchema: { type: 'object' },
            outputSchema: { type: 'object' },
            idempotency: 'none',
            errors: ['invalid_argument', 'forbidden'],
          },
        ],
      });
    }
    if (url.pathname === '/api/auth/login') {
      const chunks = [];
      req.on('data', (chunk) => chunks.push(chunk));
      req.on('end', () => {
        const body = JSON.parse(Buffer.concat(chunks).toString('utf8') || '{}');
        if (body.accountId !== 'E1001' || body.password !== 'demo-pass') return json(401, { detail: '账号或密码不正确' });
        const token = `tok-${validTokens.size + 1}`;
        validTokens.add(token);
        json(200, { token, accountId: 'E1001', displayName: '张工', expiresAt: Date.now() + 60_000 });
      });
      return;
    }
    if (url.pathname === '/api/auth/whoami') {
      return validTokens.has(bearer) ? json(200, { accountId: 'E1001' }) : json(401, { detail: '登录态已失效' });
    }
    const match = url.pathname.match(/^\/api\/capabilities\/(.+)$/);
    if (match) {
      calls.push({ capabilityId: decodeURIComponent(match[1]), token: bearer });
      if (!validTokens.has(bearer)) return json(401, { detail: '登录态已失效，请重新绑定' });
      return json(200, { executionId: 'exec-stub', status: 'succeeded', result: { total: 7 } });
    }
    json(404, { detail: 'not found' });
  });
  await new Promise((resolve) => server.listen(0, '127.0.0.1', resolve));
  return {
    baseUrl: `http://127.0.0.1:${server.address().port}`,
    calls,
    invalidate: async () => {
      await fetch(`http://127.0.0.1:${server.address().port}/__invalidate`, { method: 'POST' });
    },
    close: () => new Promise((resolve) => server.close(resolve)),
  };
}

async function startPlatform(apsUrl, databasePath = ':memory:') {
  delete process.env.APS_DEV_PROVIDER;
  process.env.APS_PROVIDER_APS_URL = apsUrl;
  const { startServer } = await import('../server/dist/index.js');
  return startServer({ host: '127.0.0.1', port: 0, version: 'test', engine: 'fake', databasePath });
}

test('A5.7 绑定→调用→登录态失效→重绑：全程密码不落盘、凭据只走一次性句柄', async () => {
  const dir = mkdtempSync(join(tmpdir(), 'aps-bind-'));
  process.env.APS_CREDENTIAL_KEY_FILE = join(dir, 'secret.key');
  const stub = await startStubSystem();
  const dbPath = join(dir, 'aps.sqlite');
  const server = await startPlatform(stub.baseUrl, dbPath);
  try {
    // 1) 未绑定：列表里是 unbound，调用被策略层拒
    const before = await (await fetch(`${server.url}/v1/bindings`, { headers: headers() })).json();
    assert.equal(before.bindings.find((b) => b.providerId === 'aps').status, 'unbound');
    const denied = await server.service.invoke({ subject, sessionId: 's', projectId: 'p-default', capabilityId: 'aps.orders.query', params: {} });
    assert.equal(denied.errorKind, 'forbidden');
    assert.equal(stub.calls.length, 0, '没绑定就不该碰业务系统');

    // 2) 发起绑定 → 3) 完成绑定（密码只出现在这一条请求里）
    const start = await (await fetch(`${server.url}/v1/bindings/aps/start`, { method: 'POST', headers: headers(), body: '{}' })).json();
    assert.equal(start.authKind, 'password-exchange');
    const completeResponse = await fetch(`${server.url}/v1/bindings/aps/complete`, {
      method: 'POST',
      headers: headers(),
      body: JSON.stringify({ accountId: 'E1001', password: 'demo-pass' }),
    });
    assert.equal(completeResponse.status, 200);
    const bound = (await completeResponse.json()).binding;
    assert.equal(bound.status, 'active');
    assert.equal(bound.accountId, 'E1001');
    assert.equal(bound.displayName, '张工');

    // 密码与 token 都不能落库
    const raw = readFileSync(dbPath, 'utf8');
    assert.ok(!raw.includes('demo-pass'), '密码绝不能落库');
    assert.ok(!raw.includes('tok-1'), 'token 只能以密文存在');

    // 4) 绑定后调用成功，而且带上了 token
    const ok = await server.service.invoke({ subject, sessionId: 's', projectId: 'p-default', capabilityId: 'aps.orders.query', params: {} });
    assert.equal(ok.status, 'succeeded');
    assert.equal(ok.result.total, 7);
    assert.equal(stub.calls.at(-1).token.startsWith('tok-'), true, '业务系统收到的应该是绑定时换来的 token');

    // 5) 业务系统作废登录态：第一次调用被业务系统拒，之后绑定变 expired，不再拿旧凭据去撞
    await stub.invalidate();
    const firstAfterInvalidate = await server.service.invoke({ subject, sessionId: 's', projectId: 'p-default', capabilityId: 'aps.orders.query', params: {} });
    assert.equal(firstAfterInvalidate.status, 'failed');
    assert.equal(firstAfterInvalidate.errorKind, 'forbidden');
    const bindingAfter = await (await fetch(`${server.url}/v1/bindings`, { headers: headers() })).json();
    assert.equal(bindingAfter.bindings.find((b) => b.providerId === 'aps').status, 'expired');

    const callsBefore = stub.calls.length;
    const blocked = await server.service.invoke({ subject, sessionId: 's', projectId: 'p-default', capabilityId: 'aps.orders.query', params: {} });
    assert.equal(blocked.status, 'failed');
    assert.match(String(blocked.result.message), /重新绑定/);
    assert.equal(stub.calls.length, callsBefore, '过期后不该再打业务系统');

    const trace = server.service.controlPlane.audit.trace(blocked.executionId);
    assert.equal(trace[0].decision, 'policy.identity_expired');

    // 6) 重新绑定后恢复
    await fetch(`${server.url}/v1/bindings/aps/complete`, {
      method: 'POST',
      headers: headers(),
      body: JSON.stringify({ accountId: 'E1001', password: 'demo-pass' }),
    });
    const recovered = await server.service.invoke({ subject, sessionId: 's', projectId: 'p-default', capabilityId: 'aps.orders.query', params: {} });
    assert.equal(recovered.status, 'succeeded', '重新绑定后应恢复');

    // 7) 解绑：凭据与映射都删掉，调用回到未绑定状态
    const removed = await (await fetch(`${server.url}/v1/bindings/aps`, { method: 'DELETE', headers: headers() })).json();
    assert.equal(removed.removed, true);
    const afterUnbind = await server.service.invoke({ subject, sessionId: 's', projectId: 'p-default', capabilityId: 'aps.orders.query', params: {} });
    assert.equal(afterUnbind.status, 'failed');
    assert.match(String(afterUnbind.result.message), /绑定/);
  } finally {
    await server.close();
    await stub.close();
    delete process.env.APS_PROVIDER_APS_URL;
    delete process.env.APS_CREDENTIAL_KEY_FILE;
    rmSync(dir, { recursive: true, force: true });
  }
});

test('A5.7 解绑 APS 不影响另一个系统', async () => {
  const dir = mkdtempSync(join(tmpdir(), 'aps-bind2-'));
  process.env.APS_CREDENTIAL_KEY_FILE = join(dir, 'secret.key');
  const stub = await startStubSystem();
  const server = await startPlatform(stub.baseUrl);
  try {
    const { createFakeProvider } = await import('@aps/provider-sdk/testing');
    const other = createFakeProvider('erp');
    await server.service.registerProvider(other);
    server.service.controlPlane.identity.bind({ userId: subject.userId, tenantId: subject.tenantId, providerId: 'erp', accountId: 'R-1' });

    await fetch(`${server.url}/v1/bindings/aps/complete`, {
      method: 'POST',
      headers: headers(),
      body: JSON.stringify({ accountId: 'E1001', password: 'demo-pass' }),
    });
    await fetch(`${server.url}/v1/bindings/aps`, { method: 'DELETE', headers: headers() });

    const otherCall = await server.service.invoke({ subject, sessionId: 's', projectId: 'p-default', capabilityId: 'erp.echo', params: { text: 'hi' } });
    assert.equal(otherCall.status, 'succeeded', '解绑 APS 不该影响 ERP 的登录态');
  } finally {
    await server.close();
    await stub.close();
    delete process.env.APS_PROVIDER_APS_URL;
    delete process.env.APS_CREDENTIAL_KEY_FILE;
    rmSync(dir, { recursive: true, force: true });
  }
});

test('A5.7 绑定失败不建绑定：账号密码不对就是拒绝', async () => {
  const dir = mkdtempSync(join(tmpdir(), 'aps-bind3-'));
  process.env.APS_CREDENTIAL_KEY_FILE = join(dir, 'secret.key');
  const stub = await startStubSystem();
  const server = await startPlatform(stub.baseUrl);
  try {
    const response = await fetch(`${server.url}/v1/bindings/aps/complete`, {
      method: 'POST',
      headers: headers(),
      body: JSON.stringify({ accountId: 'E1001', password: 'wrong' }),
    });

    assert.equal(response.status, 403);
    const list = await (await fetch(`${server.url}/v1/bindings`, { headers: headers() })).json();
    assert.equal(list.bindings.find((b) => b.providerId === 'aps').status, 'unbound');
  } finally {
    await server.close();
    await stub.close();
    delete process.env.APS_PROVIDER_APS_URL;
    delete process.env.APS_CREDENTIAL_KEY_FILE;
    rmSync(dir, { recursive: true, force: true });
  }
});