import Context from "android.content.Context";
import { UTSAndroid } from "io.dcloud.uts";
import WifiManager from "android.net.wifi.WifiManager";
import WifiInfo from "android.net.wifi.WifiInfo";
import Manifest from "android.Manifest";
import PackageManager from "android.content.pm.PackageManager";
import ScanResult from "android.net.wifi.ScanResult";
import BroadcastReceiver from "android.content.BroadcastReceiver";
import ActivityCompat from "androidx.core.app.ActivityCompat";
import IntentFilter from "android.content.IntentFilter";
import JSONObject from "com.alibaba.fastjson.JSONObject";
import Intent from "android.content.Intent";
import Thread from "java.lang.Thread";

import WifiConfiguration from 'android.net.wifi.WifiConfiguration';
import AuthAlgorithm from 'android.net.wifi.WifiConfiguration.AuthAlgorithm';
import KeyMgmt from 'android.net.wifi.WifiConfiguration.KeyMgmt';
import TextUtils from 'android.text.TextUtils';

/**
 * Wifi 函数通用入参封装
 */
type WifiOption = {
	success?: (res: object) => void;
	fail?: (res: object) => void;
	complete?: (res: object) => void;
};


/**
 * 获取当前链接的wifi信息
 */
type GetConnectedWifiOptions = {
	partialInfo?: boolean
	success?: (res: UTSJSONObject) => void
	fail?: (res: UTSJSONObject) => void
	complete?: (res: UTSJSONObject) => void
}

/**
 * Wifi 链接参数封装
 */
type WifiConnectOption = {
	SSID:string;
	BSSID:string;
	password:string;
	maunal:boolean;
	partialInfo:boolean;
	success?: (res: object) => void;
	fail?: (res: object) => void;
	complete?: (res: object) => void;
}



/**
 * 全局数据储存
 */
class Global {
	static mReceiver: CustomBroadcastReceiver|null = null;
	static WIFI_AUTH_OPEN: string = "";
	static WIFI_AUTH_ROAM: String = "[ESS]";
	// 扫描wifi结果
	static scanList: UniWifiInfo[] = []
	// 获取wifi列表监听
	static getWifiListCallbackList: UTSCallback[] = []
	// wifi链接监听
	static onWifiConnectCallbackList: UTSCallback[] = []
	static onWifiConnectWithPartialInfoCallbackList: UTSCallback[] = []
}


/**
 * 是否是标准的16进制字符
 */
function isHex(key:string):boolean {
	for (var i = key.length - 1; i >= 0; i--) {
		let c = key.charAt(i);
		if (!(c >= '0' && c <= '9' || c >= 'A' && c <= 'F' || c >= 'a'
				&& c <= 'f')) {
			return false;
		}
	}

	return true;
}

/**
 * 判断是否是wep格式的key
 */
function isHexWepKey(wepKey:string):boolean {
	let len = wepKey.length;

	// WEP-40, WEP-104, and some vendors using 256-bit WEP (WEP-232?)
	if (len != 10 && len != 26 && len != 58) {
		return false;
	}

	return isHex(wepKey);
}


/**
 * Wifi信息统一数据结构
 */
class UniWifiInfo {

	SSID: string = "";
	BSSID: string = "";
	secure: boolean = false;
	signalStrength: Number = 0;
	frequency: Number = 0;
	
	/*下面的字段属于扩展字段*/
	securityType:string = ""

	constructor(scanResult: ScanResult|null = null) {
		if (scanResult != null) {
			// 如果是通过扫描列表得到的数据，进行封装
			this.BSSID = scanResult.BSSID;
			this.SSID = scanResult.SSID;

			this.signalStrength = scanResult.level;
			this.frequency = scanResult.frequency;

			// 是否安全，微信的标准是是否需要密码。 来源:https://developers.weixin.qq.com/community/develop/doc/00064cf1790458db19cddf9925ac00?highLine=WifiInfo
			this.secure = false;
			let capabilities = scanResult.capabilities.trim();
			if ((capabilities.equals(Global.WIFI_AUTH_OPEN) || capabilities.equals(Global.WIFI_AUTH_ROAM))) {
				this.secure = false;
			} else {
				this.secure = true;
			}
			
			/*扩展字段*/
			this.securityType = getSecurityType(scanResult);
		}
	}

	/**
	 * 根据connectInfo 链接信息对wifi数据结构进行初始化
	 */
	wrapConnectInfo(connectInfo: WifiInfo): void {
		if (connectInfo.getBSSID() == null) {
			return
		}
		if (connectInfo.getSSID() != null) {
			let s = connectInfo.getSSID();
			// 微信不带，这里需要去掉引号
			if (s.length > 2 && s.charAt(0) == '"' && s.charAt(s.length - 1) == '"') {
				s = s.substring(1, s.length - 1);
			}
			this.SSID = s;
		}

		this.BSSID = connectInfo.getBSSID();
		//Android返回的值是-100~0，而微信API规范是0~100，值越大信号越好，需要+100拉齐
		this.signalStrength = connectInfo.getRssi() + 100; 
		this.frequency = connectInfo.getFrequency();

	}
	
	
}

/**
 * 连接wifi时使用，根据用户输入内容包装为系统需要的wifi配置对象
 */
@Suppress("DEPRECATION")
function wrapWifiConfiguration(SSID:string ,password:string,passwordType:string):WifiConfiguration {
		
	let config = new WifiConfiguration();
	
	config.allowedAuthAlgorithms.clear();
	config.allowedGroupCiphers.clear();
	config.allowedKeyManagement.clear();
	config.allowedPairwiseCiphers.clear();
	config.allowedProtocols.clear();
	config.SSID = "\"" + SSID + "\"";
	
	
	// nopass
	if ("NONE".equals(passwordType)) {
		config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
	}
	// wep
	if ("WEP".equals(passwordType)) {
		if (!TextUtils.isEmpty(password)) {
			if (isHexWepKey(password)) {
				config.wepKeys[0] = password;
			} else {
				config.wepKeys[0] = "\"".concat(password).concat("\"");
			}
		}
		config.allowedAuthAlgorithms.set(AuthAlgorithm.OPEN);
		config.allowedAuthAlgorithms.set(AuthAlgorithm.SHARED);
		config.allowedKeyManagement.set(KeyMgmt.NONE);
		config.wepTxKeyIndex = 0;
	}
	// wpa
	if ("WPA".equals(passwordType)) {
		config.allowedProtocols.set(WifiConfiguration.Protocol.RSN);
		config.allowedProtocols.set(WifiConfiguration.Protocol.WPA);
		config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
		config.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);
		config.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
		config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40);
		config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP104);
		config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
		config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
		config.preSharedKey = "\"".concat(password).concat("\"");
	}
	
	return config;
}


/**
 * 判断当前wifi的加密类型
 */
function getSecurityType(result:ScanResult):string {
    if (result.capabilities.contains("WEP")) {
        return "WEP";
    } else if (result.capabilities.contains("PSK")) {
        return "WPA";
    } else if (result.capabilities.contains("EAP")) {
        return "EAP";
    }
    return "NONE";
}


function zeroCountNum(source:string):number{
	var splitted = source.split(":")
	var countNum = 0;
	for(perItem in splitted){
		if(perItem == "00"){
			countNum += 1
		}
	}
	return countNum
}
/**
 * 自定义wifi变化广播监听器
 */
@Suppress("UNUSED_PARAMETER","DEPRECATION")
class CustomBroadcastReceiver extends BroadcastReceiver {

	mWifiManager: WifiManager|null = null;

	constructor(wifiManager: WifiManager) {
		super();
		this.mWifiManager = wifiManager;
	}

	override onReceive(_context: Context, intent: Intent): void {


		if (intent.action == WifiManager.WIFI_STATE_CHANGED_ACTION) {
			let state =
				intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE, WifiManager.WIFI_STATE_UNKNOWN)
			if (state == WifiManager.WIFI_STATE_ENABLED) {
				// 获取当前的connectInfo 并且进行数据封装
				let uniWifiInfo = new UniWifiInfo(null)
				//做一些异步操作
				setTimeout(function() {
					// BroadcastReceiver 中不能执行耗时任务，需要使用setTimeout
					// @ts-ignore
					let winfo = this.mWifiManager!.getConnectionInfo();
					
					while (winfo.bssid == null || zeroCountNum(winfo.bssid) > 4) {
						Thread.sleep(1000)
						winfo = this.mWifiManager!.getConnectionInfo();
					}

					// 封装成数据对象
					uniWifiInfo.wrapConnectInfo(winfo)
					let res = {
						errMsg: 'onWifiConnected:ok',
						errCode: 0,
						wifi: uniWifiInfo
					}
					// wifi状态可用了，分发当前的链接状态给已注册的监听集合
					for (let perCallback in Global.onWifiConnectCallbackList) {
						perCallback(res);
					}
					// 封装仅SSID 数据对象
					var connectedWithPartialInfo = {
						SSID:uniWifiInfo.SSID
					}
					for (let perCallback in Global.onWifiConnectWithPartialInfoCallbackList) {
						perCallback(connectedWithPartialInfo);
					}

				}, 100);
			}

		}


		if (intent.action == WifiManager.SCAN_RESULTS_AVAILABLE_ACTION) {
			// wifi 扫描结果回调
			let results = this.mWifiManager!.scanResults;

			if (results != null) {
				Global.scanList = []
				for (let scanResult in results) {
					if (scanResult.SSID == null) {
						continue;
					}
					Global.scanList.push(new UniWifiInfo(scanResult));
				}

				// 挨个通知，所有的监听器
				for (let perCallback in Global.getWifiListCallbackList) {

					const data = new JSONObject();
					// let mainJsonStr = Gson().toJson(Global.scanList);
					data["wifiList"] = Global.scanList
					perCallback(data);
				}

			}

		}
	}

}



/************************* 下面是对外提供的函数 *************************/

/**
 * 开启wifi
 */
@Suppress("DEPRECATION")
export function startWifi(option: WifiOption) {
	
	// 需要先开启wifi,才能使用后续的功能
	let requestCode = 1001;
	let permissionWifi = arrayOf("android.permission.ACCESS_FINE_LOCATION");
	var result = {
		errCode: 12001,
		errMsg: "startWifi:premission loss",
		errSubject:"uni-startWifi"
	}
	// 检查权限
	if (ActivityCompat.checkSelfPermission(UTSAndroid.getUniActivity()!, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {

		ActivityCompat.requestPermissions(UTSAndroid.getUniActivity()!, permissionWifi, requestCode)
		// 尚不具备权限，返回错误
		option.fail?.(result)
		option.complete?.(result)

		return;
	}

	// 具备了权限，继续前进
	let wifiManager: WifiManager =
		UTSAndroid.getAppContext()!.getSystemService(Context.WIFI_SERVICE) as WifiManager
	// 用户没有开启wifi 总开关
	if(!wifiManager.isWifiEnabled()){
		// wifi 没开启
		result.errCode = 12005;
		result.errMsg = "wifi not turned on";
		
		option.fail?.(result);
		option.complete?.(result);
		return;
	}
	// 初始化wifi 状态广播监听，后续所有的api，均基于此
	if (Global.mReceiver == null) {
		Global.mReceiver = new CustomBroadcastReceiver(wifiManager)
	}

	let filter = new IntentFilter()
	filter.addAction(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION)
	// @ts-ignore
	filter.addAction(WifiManager.WIFI_STATE_CHANGED_ACTION)
	// @ts-ignore
	filter.addAction(WifiManager.SUPPLICANT_STATE_CHANGED_ACTION);
	
	UTSAndroid.getUniActivity()!.registerReceiver(Global.mReceiver, filter)
	
	/**
	 * activity 被销毁时，取消注册
	 */
	UTSAndroid.onAppActivityDestroy(function(){
		
		if(Global.mReceiver!= null){
			UTSAndroid.getUniActivity()!.unregisterReceiver(Global.mReceiver)
			Global.mReceiver = null
			
			Global.scanList = []
			Global.getWifiListCallbackList = []
			Global.onWifiConnectCallbackList = []
			Global.onWifiConnectWithPartialInfoCallbackList = []
		}
		
	});
	// 开始扫描
	wifiManager.startScan()
	
	result.errCode = 0
	result.errMsg = "startWifi:ok"
	
	option.success?.(result)
	option.complete?.(result)

}

/**
 * 获取wifi列表
 */
@Suppress("DEPRECATION")
export function getWifiList(option: WifiOption) {
	
	var result = {
		errCode: 12000,
		errMsg: "getWifiList:fail:not invoke startWifi",
		errSubject:"uni-getWifiList"
	}
	
	if (Global.mReceiver == null) {
		// 还没调用startWifi 提示报错
		option.fail?.(result)
		option.complete?.(result)
	
		return
	}
	
	let wifiManager: WifiManager =
		UTSAndroid.getAppContext()!.getSystemService(Context.WIFI_SERVICE) as WifiManager
	
	wifiManager.startScan()

	let ret = {
		errCode: 0,
		errMsg: "getWifiList:ok"
	}
	option.success?.(ret)
	option.complete?.(ret)

}



/**
 * wifi 链接成功的回调注册
 */
export function onWifiConnected(callback: UTSCallback) {
	Global.onWifiConnectCallbackList.push(callback)
}


export function onWifiConnectedWithPartialInfo(callback: UTSCallback) {
	Global.onWifiConnectWithPartialInfoCallbackList.push(callback)
}


/**
 * wifi 链接成功的回调取消注册
 */
export function offWifiConnected(callback: UTSCallback) {
	let callbackIndex = Global.onWifiConnectCallbackList.indexOf(callback)
	if (callbackIndex > 0) {
		Global.onWifiConnectCallbackList.splice(callbackIndex, 1);
	}
}

export function offWifiConnectedWithPartialInfo(callback: UTSCallback) {
	let callbackIndex = Global.onWifiConnectWithPartialInfoCallbackList.indexOf(callback)
	if (callbackIndex > 0) {
		Global.onWifiConnectWithPartialInfoCallbackList.splice(callbackIndex, 1);
	}
}

/**
 * 注册Wifi列表的监听事件
 */
export function onGetWifiList(callback: UTSCallback) {
	Global.getWifiListCallbackList.push(callback)
}
/**
 * 取消注册Wifi列表的监听事件
 */
export function offGetWifiList(callback: UTSCallback) {
	let callbackIndex = Global.getWifiListCallbackList.indexOf(callback)
	if (callbackIndex > 0) {
		Global.getWifiListCallbackList.splice(callbackIndex, 1);
	}
}


/**
 * 链接指定wifi
 */
@Suppress("UNUSED_PARAMETER","DEPRECATION")
export function connectWifi(option: WifiConnectOption) {
	

	var result = {
		errCode: 12000,
		errMsg: "connectWifi:fail:not invoke startWifi",
		errSubject:"uni-connectWifi"
	}
	
	if (Global.mReceiver == null || Global.scanList.length < 1) {
		// 还没调用startWifi 提示报错
		option.fail?.(result)
		option.complete?.(result)
	
		return
	}
	
	if(option.maunal == true){
		// 指定了手动模式
		let manunalIntent = new Intent(android.provider.Settings.ACTION_WIFI_SETTINGS);
		UTSAndroid.getUniActivity()!.startActivity(manunalIntent);
		
		result.errCode = 0
		result.errMsg = "connectWifi:ok"
		
		option.success?.(result)
		option.complete?.(result)
		return 
	}
	
	// 执行后续的逻辑
	let scanWifiInfo:UniWifiInfo|null = null
	for (let scanResult in Global.scanList) {
		
		if (scanResult.SSID.equals(option.SSID)) {
			scanWifiInfo = scanResult
		}
	}
	
	if(scanWifiInfo == null){
		// 不在扫描列表中返回错误
		option.fail?.(result)
		option.complete?.(result)
		
		return
	}
	
	console.log(JSON.stringify(scanWifiInfo.securityType));
	
	let wifiConfigration = wrapWifiConfiguration(option.SSID,option.password,scanWifiInfo.securityType);
	
	console.log("wifiConfigration  == " + wifiConfigration);
	let wifiManager: WifiManager =
		UTSAndroid.getAppContext()!.getSystemService(Context.WIFI_SERVICE) as WifiManager
	
	// 如果已经存在了指定wifi 配置，移除之
	let targetExistConfig:WifiConfiguration|null = null
	let existingConfigs = wifiManager.getConfiguredNetworks();
	for (let existingConfig in existingConfigs) {
		
		if (existingConfig.SSID.equals("\"" + option.SSID + "\"")) {
			targetExistConfig = existingConfig
		}
	}
	// 如果wifi已经保存了当前ssid的配置，可能是别的应用添加的。android系统要求，需要删除掉重新添加
	console.log("targetExistConfig  == " + targetExistConfig);
	if (targetExistConfig != null) {
		wifiManager.removeNetwork(targetExistConfig.networkId);
	}
	
	let connected = false;
	try {
		
		let currentConnect =  wifiManager.getConnectionInfo()
		
		if(currentConnect.networkId >= 0){
		    wifiManager.disableNetwork(currentConnect.networkId)
		}
		wifiManager.disconnect()
		
		console.log("wifiConfigration" + wifiConfigration);
		let netID = wifiManager.addNetwork(wifiConfigration);
		// 如果-1 说明没添加上，报错即可
		console.log("netID  === " + netID);
		if(netID < 0){
			result.errCode = 12002
			result.errMsg = "connectWifi:password error Wi-Fi"
			
			option.fail?.(result)
			option.complete?.(result)
			
			return
		}
		
	
		let enabled = wifiManager.enableNetwork(netID, true);
		console.log("enabled  === " + enabled);
		connected = wifiManager.reconnect();
		console.log("connected  === " + connected);
		
	} catch (e) {
		connected = false;
		console.log(e);
	}
	
	
	if(!connected){
		// 出错了，返回错误
		// 兜底的报错
		result.errCode = 12010
		result.errMsg = "connectWifi:fail:unknown error"
		
		option.fail?.(result)
		option.complete?.(result)
		return 
	}
	
	result.errCode = 0
	result.errMsg = "connectWifi:ok"
	
	option.success?.(result)
	option.complete?.(result)
	
	
}


/**
 * 关闭wifi
 */
export function stopWifi(option: WifiOption) {
	// 需要先开启wifi,才能使用后续的功能
	if (Global.mReceiver == null) {
		var result = {
			errNo: 12000,
			errCode: 12000,
			errMsg: "stopWifi:not init"
		}
		option.fail?.(result)
		option.complete?.(result)

		return
	}
	try{
		UTSAndroid.getUniActivity()!.unregisterReceiver(Global.mReceiver)
	}catch(e){
		// 多次调用
		//TODO handle the exception
	}
	
	var result = {
		errNo: 0,
		errCode: 0,
		errMsg: "stopWifi:ok"
	}
	option.success?.(result)
	option.complete?.(result)

}

/**
 * 获取当前连接中的wifi信息
 */
@Suppress("DEPRECATION")
export function getConnectedWifi(option: GetConnectedWifiOptions) {

	let wifiInfo = new UniWifiInfo(null)

	var res = {
		errCode: 12000,
		errMsg: "getConnectedWifi:fail:not invoke startWifi",
		errSubject:"uni-getConnectedWifi",
		wifi:wifiInfo
	}

	if (Global.mReceiver == null) {
		// 还没调用startWifi 提示报错
		option.fail?.(res)
		option.complete?.(res)
	
		return
	}
	
	if (ActivityCompat.checkSelfPermission(UTSAndroid.getUniActivity()!, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
		// 尚不具备权限，返回错误
		res.errCode = 12001
		res.errMsg = "getConnectedWifi:permission loss"
		
		option.fail?.(res)
		option.complete?.(res)
		return;
	}

	// TODO 应该try catch一下，把系统的错误码给返回来，然后和微信的错误码拉齐
	// 需要先校验权限，没有位置权限无法获取wifi
	const context = UTSAndroid.getAppContext();
	if (context != null) {
		const wm = context.getSystemService(
			Context.WIFI_SERVICE
		) as WifiManager;
		// 测试android 12上可以使用
		//@ts-ignore
		const winfo = wm.getConnectionInfo();
		// 封装成数据对象
		wifiInfo.wrapConnectInfo(winfo);

		res.errCode = 0
		res.errMsg = "getConnectedWifi:ok"
		res.wifi = wifiInfo;
		option.success?.(res)
		option.complete?.(res)
		return
	}
	option.fail?.(res)
	option.complete?.(res)
}