// 会会数字分身 H5 ↔ uniapp 原生壳 桥接工具
// 协议详见 uniapp-avatar/README.md
//
// uni-webview bridge is bundled by main.ts; no external CDN is required.

const BRIDGE_HANDLER = '__uniBridgeHandle__'

export interface UniLaunchParams {
  token?: string
  userId?: string
  nickname?: string
  avatar?: string
  ts?: string
}

const PARAM_KEYS: (keyof UniLaunchParams)[] = ['token', 'userId', 'nickname', 'avatar', 'ts']

function readParams(search: string, target: UniLaunchParams): void {
  const sp = new URLSearchParams(search)
  for (const key of PARAM_KEYS) {
    const value = sp.get(key)
    if (value) target[key] = value
  }
}

// 是否运行在 uniapp web-view 环境中
export function isInUniWebView(): boolean {
  return !!(window as any).uni?.webView
}

// 解析 web-view 加载 URL 时原生注入的参数（token / 会会用户）
export function getLaunchParams(): UniLaunchParams {
  const params: UniLaunchParams = {}
  readParams(window.location.search, params)
  const hashQueryIndex = window.location.hash.indexOf('?')
  if (hashQueryIndex >= 0) {
    readParams(window.location.hash.slice(hashQueryIndex + 1), params)
  }
  return params
}

// Remove the one-time login credential before any route is rendered or logged.
export function stripLaunchToken(): void {
  const url = new URL(window.location.href)
  url.searchParams.delete('token')

  const hash = url.hash.slice(1)
  const queryIndex = hash.indexOf('?')
  if (queryIndex >= 0) {
    const path = hash.slice(0, queryIndex)
    const hashParams = new URLSearchParams(hash.slice(queryIndex + 1))
    hashParams.delete('token')
    const query = hashParams.toString()
    url.hash = `${path}${query ? `?${query}` : ''}`
  }

  window.history.replaceState(window.history.state, '', `${url.pathname}${url.search}${url.hash}`)
}

// H5 → 原生：发送事件（需引入 uniapp web-view bridge）
export function postToNative(message: Record<string, any>): boolean {
  if (!isInUniWebView()) return false
  ;(window as any).uni.webView.postMessage({ data: message })
  return true
}

// 原生 → H5：注册消息处理（原生通过 web-view.evalJS 调用 window.__uniBridgeHandle__）
export function onNativeMessage(handler: (message: any) => void): void {
  ;(window as any)[BRIDGE_HANDLER] = (message: any) => {
    try {
      handler(message)
    } catch (e) {
      console.error('[uniBridge] handler error', e)
    }
  }
}

// 便捷事件
export const UniEvents = {
  ready: () => postToNative({ type: 'ready' }),
  needLogin: () => postToNative({ type: 'needLogin' }),
  setTitle: (title: string) => postToNative({ type: 'setTitle', title }),
  navigate: (path: string) => postToNative({ type: 'navigate', path }),
  back: () => postToNative({ type: 'back' })
}