package com.stand.standapp

import android.content.Context
import android.os.Handler
import android.os.Looper
import android.util.Log
import android.webkit.JavascriptInterface
import android.widget.Toast
import android.print.PrintAttributes
import android.print.PrintManager
import com.stand.standapp.R

class AndroidInterface(private val activity: MainActivity) {

    /**
     * JS 调用：标准系统打印 (PDF/网络打印机/AirPrint)
     * 适用于打印精美的 A4 单据或页面
     */
    @JavascriptInterface
    fun printPage() {
        Handler(Looper.getMainLooper()).post {
            try {
                val printManager = activity.getSystemService(Context.PRINT_SERVICE) as PrintManager
                // 获取 WebView 的打印适配器
                val webView = activity.getAgentWeb()?.webCreator?.getWebView()
                if (webView == null) {
                    Toast.makeText(activity, "WebView 未就绪", Toast.LENGTH_SHORT).show()
                    return@post
                }

                val printAdapter = webView.createPrintDocumentAdapter("Document")
                val jobName = activity.getString(R.string.app_name) + " Print Job"

                printManager.print(jobName, printAdapter, PrintAttributes.Builder().build())
            } catch (e: Exception) {
                Log.e("Print", "系统打印失败", e)
                Toast.makeText(activity, "打印服务启动失败", Toast.LENGTH_SHORT).show()
            }
        }
    }

    /**
     * JS 调用：原始数据打印
     * 适用于热敏小票打印机 (蓝牙、USB、网络)
     * @param data 可以是 JSON 字符串，包含打印的指令或文本
     */
    @JavascriptInterface
    fun printRawData(data: String) {
        try {
            Log.d("Print", "收到 H5 原始打印数据: $data")
            Handler(Looper.getMainLooper()).post {
                try {
                    // 这里可以弹出一个选择框让用户选择打印机，或者根据配置自动连接
                    Toast.makeText(activity, "H5指令打印: $data", Toast.LENGTH_SHORT).show()
                } catch (e: Exception) {
                    Log.e("Print", "Toast显示失败", e)
                }
            }
        } catch (e: Exception) {
            Log.e("Print", "指令解析失败", e)
        }
    }

    /**
     * JS 调用：在线升级 (手动触发检查)
     */
    @JavascriptInterface
    fun startUpdate(apkUrl: String) {
        Handler(Looper.getMainLooper()).post {
            try {
                UpdateManager(activity).checkUpdate()
            } catch (e: Exception) {
                Log.e("Update", "启动更新检查失败", e)
            }
        }
    }

    /**
     * JS 调用：退出应用
     */
    @JavascriptInterface
    fun exitApp() {
        Handler(Looper.getMainLooper()).post {
            try {
                activity.showExitDialog()
            } catch (e: Exception) {
                Log.e("App", "显示退出弹窗失败", e)
                activity.finish()
            }
        }
    }

    /**
     * 获取版本号给 H5 判断是否需要升级
     */
    @JavascriptInterface
    fun getVersionName(): String {
        return try {
            val packageInfo = activity.packageManager.getPackageInfo(activity.packageName, 0)
            packageInfo.versionName ?: "1.0.0"
        } catch (e: Exception) {
            "1.0.0"
        }
    }

    /**
     * JS 调用：获取“关于”信息
     */
    @JavascriptInterface
    fun getAboutInfo(): String {
        return try {
            val packageInfo = activity.packageManager.getPackageInfo(activity.packageName, 0)
            val json = org.json.JSONObject()
            json.put("appName", activity.getString(R.string.app_name))
            json.put("versionName", packageInfo.versionName)
            json.put("model", android.os.Build.MODEL)
            json.put("osVersion", android.os.Build.VERSION.RELEASE)
            json.toString()
        } catch (e: Exception) {
            "{ \"appName\": \"StandApp\", \"versionName\": \"1.0.0\" }"
        }
    }

    /**
     * JS 调用：保存消息记录
     */
    @JavascriptInterface
    fun saveMessage(message: String) {
        try {
            val prefs = activity.getSharedPreferences("msg_records", Context.MODE_PRIVATE)
            val currentMsgs = prefs.getString("history", "") ?: ""
            val updatedMsgs = if (currentMsgs.isEmpty()) message else "$message|---|$currentMsgs"
            // 限制保存最近5000条
            val list = updatedMsgs.split("|---|").take(5000)
            prefs.edit().putString("history", list.joinToString("|---|")).apply()
        } catch (e: Exception) {
            Log.e("Storage", "消息保存异常", e)
        }
    }

    /**
     * JS 调用：获取消息记录
     */
    @JavascriptInterface
    fun getMessages(): String {
        return try {
            val prefs = activity.getSharedPreferences("msg_records", Context.MODE_PRIVATE)
            prefs.getString("history", "") ?: ""
        } catch (e: Exception) {
            ""
        }
    }

    /**
     * JS 调用：清空消息记录
     */
    @JavascriptInterface
    fun clearMessages() {
        try {
            activity.getSharedPreferences("msg_records", Context.MODE_PRIVATE).edit().clear().apply()
            Handler(Looper.getMainLooper()).post {
                Toast.makeText(activity, "记录已清空", Toast.LENGTH_SHORT).show()
            }
        } catch (e: Exception) {
            Log.e("Storage", "清空记录异常", e)
        }
    }

    /**
     * JS 回调：告知 App 页面加载完成
     */
    @JavascriptInterface
    fun onPageFinished() {
        Handler(Looper.getMainLooper()).post {
            try {
                activity.cancelTimeoutTimer()
                activity.findViewById<android.view.View>(R.id.loading_layout)?.visibility = android.view.View.GONE
            } catch (e: Exception) {
                Log.e("UI", "隐藏加载布局失败", e)
            }
        }
    }
}