// Help Chat Button SDK 配置接口
export interface HelpChatButtonConfig {
  // 主题颜色配置
  themeColor?: string | string[]
  
  // 按钮位置配置
  position?: {
    top?: string
    right?: string
    bottom?: string
    left?: string
  }
  
  // 是否可拖拽
  draggable?: boolean
  
  // AI 聊天配置
  aiChatConfig?: {
    pollingInterval?: number
    botCode: string
  }
  
  // 用户信息
  userId: string
  userName?: string
  
  // 反馈中心配置
  feedbackConfig?: {
    systemId: string
  }
}

// 全局配置
let globalConfig: HelpChatButtonConfig = {
  themeColor: ['#667eea', '#764ba2'],
  position: {
    top: 'auto',
    right: '20px',
    bottom: '20px',
    left: 'auto'
  },
  draggable: true,
  aiChatConfig: {
    pollingInterval: 500,
    botCode: ''
  },
  userId: '',
  userName: 'name',
  feedbackConfig: {
    systemId: ''
  }
}

// 设置全局配置
export const setHelpChatButtonConfig = (config: Partial<HelpChatButtonConfig>) => {
  globalConfig = { ...globalConfig, ...config }
  
  // 深度合并嵌套对象
  if (config.position) {
    globalConfig.position = { ...globalConfig.position, ...config.position }
  }
  if (config.aiChatConfig) {
    globalConfig.aiChatConfig = { ...globalConfig.aiChatConfig, ...config.aiChatConfig }
  }
  if (config.feedbackConfig) {
    globalConfig.feedbackConfig = { ...globalConfig.feedbackConfig, ...config.feedbackConfig }
  }
}

// 获取全局配置
export const getHelpChatButtonConfig = (): HelpChatButtonConfig => ({ ...globalConfig })

// 验证配置
export const validateConfig = (config: HelpChatButtonConfig): void => {
  if (!config.userId) {
    throw new Error('userId 是必需参数')
  }
  if (!config.aiChatConfig?.botCode) {
    throw new Error('aiChatConfig.botCode 是必需参数')
  }
  if (!config.feedbackConfig?.systemId) {
    throw new Error('feedbackConfig.systemId 是必需参数')
  }
}