const assert = require('assert');

const { exchangeCode, _private } = require('../src/services/ag_verify_service');

function emptyLocator() {
  return {
    count: async () => 0,
    nth: () => { throw new Error('empty locator'); },
  };
}

(async () => {
  {
    let currentUrl = 'https://accounts.google.com/signin/challenge/totp';
    const input = {
      isVisible: async () => true,
      fill: async () => {
        currentUrl = 'https://accounts.google.com/o/oauth2/approval/v2/approvalnativeapp';
        throw new Error('page.evaluate: Execution context was destroyed, most likely because of a navigation');
      },
    };
    const page = {
      url: () => currentUrl,
      locator: selector => selector === 'input[id="totpPin"]'
        ? { count: async () => 1, nth: () => input }
        : emptyLocator(),
    };
    const result = await _private.fillOAuthTotpIfCurrent(page, '123456');
    assert.strictEqual(result.ok, false);
    assert.strictEqual(result.state, 'page_changed');
  }

  {
    let locatorCalls = 0;
    const page = {
      url: () => 'https://accounts.google.com/o/oauth2/approval/v2/approvalnativeapp',
      locator: () => {
        locatorCalls++;
        return emptyLocator();
      },
    };
    const result = await _private.fillOAuthTotpIfCurrent(page, '123456');
    assert.strictEqual(result.state, 'left_totp');
    assert.strictEqual(locatorCalls, 0, '离开TOTP后不得继续访问旧输入框');
  }

  assert.strictEqual(
    _private.isPageNavigationRaceError(new Error('Execution context was destroyed, most likely because of a navigation')),
    true,
  );

  {
    let currentUrl = 'https://accounts.google.com/loading';
    let marker = 'Loading';
    let pollCount = 0;
    const page = {
      url: () => currentUrl,
      evaluate: async () => ({ readyState: 'complete', marker: `${marker.length}:${marker}:` }),
      waitForLoadState: async () => {},
      waitForTimeout: async () => {
        pollCount++;
        currentUrl = 'https://accounts.google.com/oauth/consent';
        marker = 'Allow access';
      },
      locator: () => emptyLocator(),
    };
    const beforeState = await _private.captureOAuthPageState(page);
    const progressed = await _private.waitForOAuthPageProgress(page, beforeState, {
      timeoutMs: 2000,
      pollMs: 100,
    });
    assert.strictEqual(progressed, true, 'URL或页面内容变化后应立即结束等待');
    assert.strictEqual(pollCount, 1, '页面进展监控不得继续执行固定长等待');
  }

  {
    let captchaVisible = true;
    let challengeNotices = 0;
    let clearedNotices = 0;
    let polls = 0;
    const captchaBody = {
      innerText: async () => captchaVisible ? 'Verify that you are not a robot' : 'Continue to OAuth',
    };
    const page = {
      url: () => captchaVisible
        ? 'https://accounts.google.com/signin/challenge/recaptcha'
        : 'https://accounts.google.com/o/oauth2/approval',
      isClosed: () => false,
      locator: selector => selector === 'body'
        ? captchaBody
        : emptyLocator(),
      waitForTimeout: async () => {
        polls++;
        captchaVisible = false;
      },
    };
    const result = await _private.waitForManualCaptchaClear(page, {
      timeoutMs: 5000,
      pollMs: 50,
      onChallenge: () => { challengeNotices++; },
      onCleared: () => { clearedNotices++; },
    });
    assert.strictEqual(result.cleared, true, '手动验证完成后应自动继续');
    assert.strictEqual(polls, 1);
    assert.strictEqual(challengeNotices, 1);
    assert.strictEqual(clearedNotices, 1);
  }

  {
    const closedPage = {
      isClosed: () => true,
      locator: () => emptyLocator(),
    };
    const result = await _private.waitForManualCaptchaClear(closedPage, { timeoutMs: 10, pollMs: 50 });
    assert.strictEqual(result.cleared, false);
    assert.strictEqual(result.pageClosed, true, '人工验证期间关闭浏览器应立即停止等待');
  }

  {
    let clicked = '';
    const choices = [
      {
        isVisible: async () => true,
        getAttribute: async () => 'other@example.com',
        innerText: async () => 'Other\nother@example.com',
        boundingBox: async () => null,
        click: async () => { clicked = 'other@example.com'; },
      },
      {
        isVisible: async () => true,
        getAttribute: async () => 'User.Name@gmail.com',
        innerText: async () => 'User Name\nUser.Name@gmail.com',
        boundingBox: async () => null,
        click: async () => { clicked = 'User.Name@gmail.com'; },
      },
    ];
    const page = {
      locator: selector => selector === '[data-identifier]'
        ? { count: async () => choices.length, nth: index => choices[index] }
        : emptyLocator(),
    };
    assert.strictEqual(
      await _private.chooseExpectedOAuthAccount(page, 'username@gmail.com'),
      true,
      '账号选择页应按 Gmail 忽略点号规则匹配当前任务账号',
    );
    assert.strictEqual(clicked, 'User.Name@gmail.com', '不得误点列表中的第一个其它账号');
  }

  {
    const page = {
      url: () => 'https://access.workspace.google.com/ServiceNotAllowed?application=923893674115',
      locator: () => ({ innerText: async () => '' }),
    };
    assert.strictEqual(await _private.isGoogleWorkspaceServiceNotAllowedPage(page), true);
  }

  {
    const page = {
      url: () => 'https://access.workspace.google.com/',
      locator: () => ({
        innerText: async () => 'We are sorry, but you do not have access to Google Cloud Platform.',
      }),
    };
    assert.strictEqual(await _private.isGoogleWorkspaceServiceNotAllowedPage(page), true);
  }

  {
    const page = {
      // 即使与无权限页共用 ServiceNotAllowed 地址，也必须优先按正文判为未满18岁。
      url: () => 'https://access.workspace.google.com/ServiceNotAllowed?application=923893674115',
      locator: () => ({
        innerText: async () => "Can't access this service\nThis service is unavailable for Google Workspace for Education users marked as under the age of 18 by their administrator.",
      }),
    };
    const denial = await _private.detectGoogleWorkspaceAccessDenial(page);
    assert.strictEqual(denial.reasonCode, 'GOOGLE_UNDER_18');
    assert.strictEqual(await _private.isGoogleWorkspaceServiceNotAllowedPage(page), false);
  }

  {
    let evaluateCalls = 0;
    const page = {
      evaluate: async () => {
        evaluateCalls++;
        if (evaluateCalls < 3) {
          throw new Error('page.evaluate: Execution context was destroyed, most likely because of a navigation');
        }
        return {
          statusCode: 200,
          body: JSON.stringify({ access_token: 'test-access-token', refresh_token: 'test-refresh-token' }),
          error: null,
        };
      },
      waitForLoadState: async () => {},
      waitForTimeout: async () => {},
    };
    const token = await exchangeCode('dummy-authorization-code', page);
    assert.strictEqual(token.access_token, 'test-access-token');
    assert.strictEqual(token.refresh_token, 'test-refresh-token');
    assert.strictEqual(evaluateCalls, 3, '页面上下文销毁后应在浏览器内重试');
  }

  console.log('ag_oauth_resilience.test.js: PASS');
})().catch(error => {
  console.error(error);
  process.exitCode = 1;
});