/**
 * Auth Token 测试
 *
 * 测试 Token 生成、验证、脱敏显示等功能
 */

import { describe, it, expect, beforeEach, vi } from 'vitest';
import { Hono } from 'hono';
import {
  generateToken,
  maskToken,
  initAuth,
  getAuthConfig,
  addToken,
  removeToken,
  setAuthEnabled,
  validateToken,
  extractToken,
  authMiddleware,
  getAuthContext,
} from '../../../src/auth/token.js';
import { createMockHonoContext } from '../../mocks/hono.mock.js';

describe('Auth Token', () => {
  beforeEach(() => {
    // 每个测试前重置配置
    initAuth({
      enabled: false,
      tokens: [],
      skipPaths: ['/health', '/api/health'],
    });
  });

  describe('generateToken - Token 生成', () => {
    it('生成默认长度(32)的 token', () => {
      const token = generateToken();
      expect(token).toHaveLength(32);
    });

    it('生成指定长度的 token', () => {
      const token = generateToken(16);
      expect(token).toHaveLength(16);
    });

    it('token 只包含字母和数字', () => {
      const token = generateToken(100);
      expect(token).toMatch(/^[A-Za-z0-9]+$/);
    });

    it('每次生成的 token 不同', () => {
      const token1 = generateToken();
      const token2 = generateToken();
      expect(token1).not.toBe(token2);
    });
  });

  describe('maskToken - Token 脱敏', () => {
    it('长 token 显示前4位和后4位', () => {
      const token = 'abcd1234567890efgh';
      const masked = maskToken(token);
      expect(masked).toBe('abcd...efgh');
    });

    it('短 token (<=8) 完全隐藏', () => {
      expect(maskToken('12345678')).toBe('****');
      expect(maskToken('1234567')).toBe('****');
      expect(maskToken('abc')).toBe('****');
    });

    it('正好9位的 token 正常脱敏', () => {
      const token = '123456789';
      const masked = maskToken(token);
      expect(masked).toBe('1234...6789');
    });
  });

  describe('initAuth - 配置初始化', () => {
    it('使用默认配置初始化', () => {
      const config = initAuth();
      expect(config.enabled).toBe(false);
      expect(config.tokens).toEqual([]);
      expect(config.skipPaths).toContain('/health');
    });

    it('合并自定义配置', () => {
      const config = initAuth({
        enabled: true,
        tokens: ['test-token'],
      });
      expect(config.enabled).toBe(true);
      expect(config.tokens).toEqual(['test-token']);
      expect(config.skipPaths).toContain('/health'); // 保留默认值
    });

    it('完全覆盖配置', () => {
      const config = initAuth({
        enabled: true,
        tokens: ['token1', 'token2'],
        skipPaths: ['/custom-skip'],
      });
      expect(config.skipPaths).toEqual(['/custom-skip']);
    });
  });

  describe('getAuthConfig - 获取配置', () => {
    it('返回当前配置', () => {
      initAuth({ enabled: true, tokens: ['test'] });
      const config1 = getAuthConfig();
      const config2 = getAuthConfig();

      // 应该返回相同内容
      expect(config1).toEqual(config2);
      expect(config1.enabled).toBe(true);
      expect(config1.tokens).toContain('test');
    });

    it('修改 enabled 不影响原配置', () => {
      initAuth({ enabled: true });
      const config = getAuthConfig();
      config.enabled = false;

      const freshConfig = getAuthConfig();
      expect(freshConfig.enabled).toBe(true);
    });
  });

  describe('addToken / removeToken - Token 管理', () => {
    it('添加新 token', () => {
      addToken('new-token');
      expect(getAuthConfig().tokens).toContain('new-token');
    });

    it('不重复添加相同 token', () => {
      addToken('same-token');
      addToken('same-token');
      const tokens = getAuthConfig().tokens;
      expect(tokens.filter((t) => t === 'same-token')).toHaveLength(1);
    });

    it('移除存在的 token', () => {
      addToken('to-remove');
      removeToken('to-remove');
      expect(getAuthConfig().tokens).not.toContain('to-remove');
    });

    it('移除不存在的 token 无副作用', () => {
      const before = getAuthConfig().tokens.length;
      removeToken('non-existent');
      expect(getAuthConfig().tokens.length).toBe(before);
    });
  });

  describe('setAuthEnabled - 启用/禁用认证', () => {
    it('启用认证', () => {
      setAuthEnabled(true);
      expect(getAuthConfig().enabled).toBe(true);
    });

    it('禁用认证', () => {
      setAuthEnabled(true);
      setAuthEnabled(false);
      expect(getAuthConfig().enabled).toBe(false);
    });
  });

  describe('validateToken - Token 验证', () => {
    beforeEach(() => {
      initAuth({ tokens: ['valid-token-1', 'valid-token-2'] });
    });

    it('有效 token 返回 true', () => {
      expect(validateToken('valid-token-1')).toBe(true);
      expect(validateToken('valid-token-2')).toBe(true);
    });

    it('无效 token 返回 false', () => {
      expect(validateToken('invalid-token')).toBe(false);
      expect(validateToken('')).toBe(false);
    });
  });

  describe('extractToken - 从请求提取 Token', () => {
    it('从 Authorization header 提取 Bearer token', () => {
      const c = createMockHonoContext({
        headers: { authorization: 'Bearer my-secret-token' },
      });

      const token = extractToken(c as any);
      expect(token).toBe('my-secret-token');
    });

    it('从 query parameter 提取 token', () => {
      const c = createMockHonoContext({
        query: { token: 'query-token' },
      });

      const token = extractToken(c as any);
      expect(token).toBe('query-token');
    });

    it('Authorization header 优先于 query', () => {
      const c = createMockHonoContext({
        headers: { authorization: 'Bearer header-token' },
        query: { token: 'query-token' },
      });

      const token = extractToken(c as any);
      expect(token).toBe('header-token');
    });

    it('无 token 时返回 null', () => {
      const c = createMockHonoContext();
      const token = extractToken(c as any);
      expect(token).toBeNull();
    });

    it('非 Bearer 格式的 Authorization 返回 null', () => {
      const c = createMockHonoContext({
        headers: { authorization: 'Basic abc123' },
      });

      const token = extractToken(c as any);
      expect(token).toBeNull();
    });
  });

  describe('authMiddleware - 认证中间件', () => {
    let app: Hono;

    beforeEach(() => {
      app = new Hono();
      app.use('*', authMiddleware);
      app.get('/test', (c) => {
        const auth = getAuthContext(c);
        return c.json({ auth });
      });
      app.get('/health', (c) => c.json({ status: 'ok' }));
    });

    it('认证禁用时允许所有请求', async () => {
      initAuth({ enabled: false });

      const res = await app.request('/test');
      const json = await res.json();

      expect(res.status).toBe(200);
      expect(json.auth.authenticated).toBe(true);
    });

    it('跳过配置的路径', async () => {
      initAuth({ enabled: true, skipPaths: ['/health'] });

      const res = await app.request('/health');

      expect(res.status).toBe(200);
    });

    it('本地请求 (x-forwarded-for: 127.0.0.1) 跳过认证', async () => {
      initAuth({ enabled: true, tokens: ['valid-token'] });

      const res = await app.request('/test', {
        headers: { 'x-forwarded-for': '127.0.0.1' },
      });
      const json = await res.json();

      expect(res.status).toBe(200);
      expect(json.auth.authenticated).toBe(true);
    });

    it('本地请求 (x-forwarded-for: ::1) 跳过认证', async () => {
      initAuth({ enabled: true, tokens: ['valid-token'] });

      const res = await app.request('/test', {
        headers: { 'x-forwarded-for': '::1' },
      });

      expect(res.status).toBe(200);
    });

    it('本地请求 (x-real-ip: 192.168.1.1) 跳过认证', async () => {
      initAuth({ enabled: true, tokens: ['valid-token'] });

      const res = await app.request('/test', {
        headers: { 'x-real-ip': '192.168.1.1' },
      });

      expect(res.status).toBe(200);
    });

    it('本地请求 (x-real-ip: 10.0.0.1) 跳过认证', async () => {
      initAuth({ enabled: true, tokens: ['valid-token'] });

      const res = await app.request('/test', {
        headers: { 'x-real-ip': '10.0.0.1' },
      });

      expect(res.status).toBe(200);
    });

    it('本地请求 (x-forwarded-for: 172.16.0.1) 跳过认证', async () => {
      initAuth({ enabled: true, tokens: ['valid-token'] });

      const res = await app.request('/test', {
        headers: { 'x-forwarded-for': '172.16.0.1' },
      });

      expect(res.status).toBe(200);
    });

    it('无代理头时默认为本地请求', async () => {
      initAuth({ enabled: true, tokens: ['valid-token'] });

      // 不设置任何代理头，应该被视为本地请求
      const res = await app.request('/test');

      expect(res.status).toBe(200);
    });

    it('远程请求无 token 时返回 401', async () => {
      initAuth({ enabled: true, tokens: ['valid-token'] });

      const res = await app.request('/test', {
        headers: { 'x-forwarded-for': '8.8.8.8' },
      });
      const json = await res.json();

      expect(res.status).toBe(401);
      expect(json.error).toBe('Authentication required');
    });

    it('远程请求无效 token 时返回 401', async () => {
      initAuth({ enabled: true, tokens: ['valid-token'] });

      const res = await app.request('/test', {
        headers: {
          'x-forwarded-for': '8.8.8.8',
          authorization: 'Bearer invalid-token',
        },
      });
      const json = await res.json();

      expect(res.status).toBe(401);
      expect(json.error).toBe('Invalid token');
    });

    it('远程请求有效 token 时通过认证', async () => {
      initAuth({ enabled: true, tokens: ['valid-token'] });

      const res = await app.request('/test', {
        headers: {
          'x-forwarded-for': '8.8.8.8',
          authorization: 'Bearer valid-token',
        },
      });
      const json = await res.json();

      expect(res.status).toBe(200);
      expect(json.auth.authenticated).toBe(true);
      expect(json.auth.tokenHint).toBe('vali...oken');
    });

    it('query parameter token 也可以认证', async () => {
      initAuth({ enabled: true, tokens: ['query-token-12345'] });

      const res = await app.request('/test?token=query-token-12345', {
        headers: { 'x-forwarded-for': '8.8.8.8' },
      });
      const json = await res.json();

      expect(res.status).toBe(200);
      expect(json.auth.authenticated).toBe(true);
    });

    it('x-forwarded-for 多个 IP 时使用第一个', async () => {
      initAuth({ enabled: true, tokens: ['valid-token'] });

      // 第一个是本地 IP
      const res = await app.request('/test', {
        headers: { 'x-forwarded-for': '127.0.0.1, 8.8.8.8, 1.1.1.1' },
      });

      expect(res.status).toBe(200);
    });
  });

  describe('getAuthContext - 获取认证上下文', () => {
    it('未设置时返回 authenticated: false', () => {
      const c = createMockHonoContext();
      (c.get as any) = vi.fn().mockReturnValue(undefined);

      const auth = getAuthContext(c as any);
      expect(auth.authenticated).toBe(false);
    });

    it('已设置时返回设置的值', () => {
      const c = createMockHonoContext();
      const mockAuth = { authenticated: true, tokenHint: 'test...hint' };
      (c.get as any) = vi.fn().mockReturnValue(mockAuth);

      const auth = getAuthContext(c as any);
      expect(auth).toEqual(mockAuth);
    });
  });
});
