/**
 * Proxy Config Utils - Tests
 * 代理配置验证和工具函数测试
 */

import { describe, it, expect } from 'vitest'
import {
  validateProxyConfig,
  parseProxyUrl,
  buildProxyUrl,
  isProxyConfigured,
  getDefaultProxyConfig,
} from '../../src/utils/proxy'
import type { ProxyConfig } from '../../shared/types/session.types'

describe('Proxy Utils', () => {
  describe('getDefaultProxyConfig', () => {
    it('应返回默认代理配置', () => {
      const config = getDefaultProxyConfig()
      expect(config).toEqual({
        type: 'none',
        host: '',
        port: 0,
        username: '',
        password: '',
      })
    })
  })

  describe('isProxyConfigured', () => {
    it('type=none 应返回 false', () => {
      expect(isProxyConfigured({ type: 'none', host: '', port: 0 })).toBe(false)
    })

    it('type=http 有 host 应返回 true', () => {
      expect(isProxyConfigured({ type: 'http', host: 'proxy.example.com', port: 8080 })).toBe(true)
    })

    it('type=socks5 有 host 应返回 true', () => {
      expect(isProxyConfigured({ type: 'socks5', host: '127.0.0.1', port: 1080 })).toBe(true)
    })

    it('type=http 但 host 为空应返回 false', () => {
      expect(isProxyConfigured({ type: 'http', host: '', port: 8080 })).toBe(false)
    })
  })

  describe('validateProxyConfig', () => {
    it('type=none 应始终有效', () => {
      const result = validateProxyConfig({ type: 'none', host: '', port: 0 })
      expect(result.valid).toBe(true)
      expect(result.error).toBeUndefined()
    })

    it('有效的 HTTP 代理配置应通过验证', () => {
      const config: ProxyConfig = { type: 'http', host: 'proxy.example.com', port: 8080 }
      const result = validateProxyConfig(config)
      expect(result.valid).toBe(true)
    })

    it('有效的 SOCKS5 代理配置应通过验证', () => {
      const config: ProxyConfig = { type: 'socks5', host: '127.0.0.1', port: 1080 }
      const result = validateProxyConfig(config)
      expect(result.valid).toBe(true)
    })

    it('host 为空应验证失败', () => {
      const config: ProxyConfig = { type: 'http', host: '', port: 8080 }
      const result = validateProxyConfig(config)
      expect(result.valid).toBe(false)
      expect(result.error).toContain('host')
    })

    it('port 为 0 应验证失败', () => {
      const config: ProxyConfig = { type: 'http', host: 'proxy.example.com', port: 0 }
      const result = validateProxyConfig(config)
      expect(result.valid).toBe(false)
      expect(result.error).toContain('port')
    })

    it('port 为负数应验证失败', () => {
      const config: ProxyConfig = { type: 'socks5', host: '127.0.0.1', port: -1 }
      const result = validateProxyConfig(config)
      expect(result.valid).toBe(false)
      expect(result.error).toContain('port')
    })

    it('port 超过 65535 应验证失败', () => {
      const config: ProxyConfig = { type: 'http', host: 'proxy.example.com', port: 70000 }
      const result = validateProxyConfig(config)
      expect(result.valid).toBe(false)
      expect(result.error).toContain('port')
    })

    it('host 含有非法字符应验证失败', () => {
      const config: ProxyConfig = { type: 'http', host: 'proxy example.com', port: 8080 }
      const result = validateProxyConfig(config)
      expect(result.valid).toBe(false)
      expect(result.error).toContain('host')
    })

    it('带用户名密码的有效代理应通过验证', () => {
      const config: ProxyConfig = {
        type: 'http',
        host: 'proxy.example.com',
        port: 8080,
        username: 'user',
        password: 'pass',
      }
      const result = validateProxyConfig(config)
      expect(result.valid).toBe(true)
    })
  })

  describe('parseProxyUrl', () => {
    it('应解析 HTTP 代理 URL', () => {
      const result = parseProxyUrl('http://proxy.example.com:8080')
      expect(result).toEqual({
        type: 'http',
        host: 'proxy.example.com',
        port: 8080,
        username: '',
        password: '',
      })
    })

    it('应解析 SOCKS5 代理 URL', () => {
      const result = parseProxyUrl('socks5://127.0.0.1:1080')
      expect(result).toEqual({
        type: 'socks5',
        host: '127.0.0.1',
        port: 1080,
        username: '',
        password: '',
      })
    })

    it('应解析带认证的代理 URL', () => {
      const result = parseProxyUrl('http://user:pass@proxy.example.com:3128')
      expect(result).toEqual({
        type: 'http',
        host: 'proxy.example.com',
        port: 3128,
        username: 'user',
        password: 'pass',
      })
    })

    it('应解析无端口的 URL (使用默认端口)', () => {
      const result = parseProxyUrl('http://proxy.example.com')
      expect(result).toEqual({
        type: 'http',
        host: 'proxy.example.com',
        port: 80,
        username: '',
        password: '',
      })
    })

    it('SOCKS5 无端口应使用 1080', () => {
      const result = parseProxyUrl('socks5://proxy.example.com')
      expect(result).toEqual({
        type: 'socks5',
        host: 'proxy.example.com',
        port: 1080,
        username: '',
        password: '',
      })
    })

    it('无效 URL 应返回 null', () => {
      expect(parseProxyUrl('')).toBeNull()
      expect(parseProxyUrl('not-a-url')).toBeNull()
    })

    it('不支持的协议应返回 null', () => {
      expect(parseProxyUrl('ftp://proxy.example.com:21')).toBeNull()
    })
  })

  describe('buildProxyUrl', () => {
    it('应构建 HTTP 代理 URL', () => {
      const config: ProxyConfig = { type: 'http', host: 'proxy.example.com', port: 8080 }
      expect(buildProxyUrl(config)).toBe('http://proxy.example.com:8080')
    })

    it('应构建带认证的代理 URL', () => {
      const config: ProxyConfig = {
        type: 'socks5',
        host: '127.0.0.1',
        port: 1080,
        username: 'user',
        password: 'pass',
      }
      expect(buildProxyUrl(config)).toBe('socks5://user:pass@127.0.0.1:1080')
    })

    it('type=none 应返回空字符串', () => {
      const config: ProxyConfig = { type: 'none', host: '', port: 0 }
      expect(buildProxyUrl(config)).toBe('')
    })
  })
})