package top.yeij.hearth.webview

import android.annotation.SuppressLint
import android.app.Activity
import android.graphics.Color
import android.view.ViewGroup
import android.webkit.WebView
import android.webkit.WebViewClient

// WebView 工厂：统一内核配置，桌面层挂到指定父容器，内容层按需创建
// WebView factory: unified kernel config; the desktop layer attaches to a given
// parent container, content layers are created on demand
class WebViewManager(private val activity: Activity) {
    // 创建桌面 WebView（底层 H5）挂到 parent，加载内置 index.html
    // Create the desktop WebView (bottom H5 layer) under parent, load bundled index.html
    @SuppressLint("SetJavaScriptEnabled")
    fun attach(bridge: JsBridge, parent: ViewGroup): WebView {
        val webView = WebView(activity)
        webView.setBackgroundColor(Color.TRANSPARENT)
        configure(webView)
        webView.addJavascriptInterface(bridge, "HearthBridge")
        webView.webViewClient = WebViewClient()
        webView.loadUrl("file:///android_asset/h5/index.html")
        parent.addView(webView, ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT))
        return webView
    }

    // 创建内容 WebView（webAPP 标签页），仅配置不加载、不挂载（由宿主管理）
    // 透明背景：webAPP 未声明背景色时透出桌面壁纸，而非默认白底
    // Create a content WebView (webapp tab), configured but not loaded/attached
    // (lifecycle is managed by the host); transparent background so a webapp without
    // a declared background shows the wallpaper instead of a default white
    @SuppressLint("SetJavaScriptEnabled")
    fun createContentWebView(ua: String?, scale: Int?): WebView {
        val webView = WebView(activity)
        webView.setBackgroundColor(Color.TRANSPARENT)
        configure(webView)
        // UA 解析：desktop/pc → PC UA；自定义字符串 → 直接用；null → 默认平板 UA
        // UA resolution: desktop/pc -> desktop UA; custom string -> used as-is;
        // null -> default tablet UA
        webView.settings.userAgentString = when {
            ua == null -> UA_TABLET
            ua == "desktop" || ua == "pc" -> UA_DESKTOP
            else -> ua
        }
        // scale 由 WebAppHost 在 onPageFinished 里通过 CSS zoom 实现（reflow 缩放），
        // 此处不再做 View 级别缩放
        // scale is applied by WebAppHost via CSS zoom in onPageFinished (reflow
        // scaling); no view-level scaling here
        return webView
    }

    // 统一内核配置：JS、宽视口、DOM 存储，禁用缩放
    // Common kernel config: JS, wide viewport, DOM storage, zoom disabled
    @SuppressLint("SetJavaScriptEnabled")
    private fun configure(webView: WebView) {
        webView.settings.apply {
            javaScriptEnabled = true
            useWideViewPort = true
            loadWithOverviewMode = true
            setSupportZoom(false)
            domStorageEnabled = true
            // Android 11 + targetSdk 30 默认禁用 file:// 访问，本地离线包需要显式开启
            // Android 11 + targetSdk 30 disables file:// by default; local offline
            // packages need it explicitly enabled
            allowFileAccess = true
            allowContentAccess = true
        }
    }

    companion object {
        // PC 版 UA（desktop/pc）
        private const val UA_DESKTOP =
            "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 " +
                "(KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36"
        // 安卓平板 UA（默认）
        private const val UA_TABLET =
            "Mozilla/5.0 (Linux; Android 13; SM-X700 Build/TP1A.220624.014) " +
                "AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36"
    }
}