import Context from "android.content.Context";
import { getAppContext, getUniActivity } from "io.dcloud.uts.android";
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 Gson from "com.google.gson.Gson";
import JSONObject from "com.alibaba.fastjson.JSONObject";
import Intent from "android.content.Intent";
import Thread from "java.lang.Thread";

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

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

	SSID: String = "";
	BSSID: String = "";
	secure: boolean = false;
	signalStrength: Number = 0;
	frequency: Number = 0;

	constructor(scanResult?: ScanResult) {
		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 != null && (capabilities.equals(Global.WIFI_AUTH_OPEN) || capabilities.equals(Global.WIFI_AUTH_ROAM))) {
				this.secure = false;
			} else {
				this.secure = true;
			}
		}
	}

	/**
	 * 根据connectInfo 链接信息对wifi数据结构进行初始化
	 */
	wrapConnectInfo(connectInfo: WifiInfo): void {
		console.log(connectInfo.getSSID());
		console.log(connectInfo.getBSSID());
		if (connectInfo.getBSSID() == null) {
			return
		}
		if (connectInfo != null) {
			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();

		}
	}


}

/**
 * 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
}



/**
 * 全局数据储存
 */
class Global {
	static mReceiver?: CustomBroadcastReceiver = null;
	static scanList: UniWifiInfo[] = []
	static WIFI_AUTH_OPEN: String = "";
	static WIFI_AUTH_ROAM: String = "[ESS]";
	static getWifiListCallbackList: UTSCallback[] = []
	static onWifiConnectCallbackList: UTSCallback[] = []
}


/**
 * 自定义wifi变化广播监听器
 */
class CustomBroadcastReceiver extends BroadcastReceiver {

	mWifiManager?: WifiManager = 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
					console.log(Thread.currentThread().getName())
					let winfo = this.mWifiManager!.getConnectionInfo();
					while (winfo.bssid == null) {
						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
					}
					console.log("Global.onWifiConnectCallbackList  == " + Global.onWifiConnectCallbackList.length);
					// 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);
					}

				}, 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"] = mainJsonStr
					perCallback(data);
				}

			}

		}
	}

}

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

/**
 * 获取wifi列表
 */
export function getWifiList(option: WifiOption) {
	let wifiManager: WifiManager =
		getAppContext()!.getSystemService(Context.WIFI_SERVICE) as WifiManager
	wifiManager.startScan()

	let ret = {
		errNo: 0,
		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)
}

/**
 * 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);
	}
}

/**
 * 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);
	}
}

export function connectWifi(option: WifiOption) {
	
}

/**
 * 开启wifi
 */
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");

	// 检查权限
	if (ActivityCompat.checkSelfPermission(getUniActivity()!, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {

		ActivityCompat.requestPermissions(getUniActivity()!, permissionWifi, requestCode)
		// 尚不具备权限，返回错误
		var result = {
			errNo: 0,
			errCode: 0,
			errMsg: "startWifi:premission loss"
		}
		option.fail?.(result)
		option.complete?.(result)

		return;
	}

	// 具备了权限，继续前进
	let wifiManager: WifiManager =
		getAppContext()!.getSystemService(Context.WIFI_SERVICE) as WifiManager

	if (Global.mReceiver == null) {
		Global.mReceiver = new CustomBroadcastReceiver(wifiManager)
	}

	let filter = new IntentFilter()
	filter.addAction(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION)
	filter.addAction(WifiManager.WIFI_STATE_CHANGED_ACTION)
	filter.addAction(WifiManager.SUPPLICANT_STATE_CHANGED_ACTION);

	getUniActivity()!.registerReceiver(Global.mReceiver, filter)
	wifiManager.startScan()
	var result = {
		errNo: 0,
		errCode: 0,
		errMsg: "startWifi: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
	}

	getUniActivity()!.unregisterReceiver(Global.mReceiver)
	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
 */
export function getConnectedWifi(option: GetConnectedWifiOptions) {

	console.log(option);

	let WifiInfo = new UniWifiInfo(null)

	let res = {
		errMsg: 'getConnectedWifi:fail. please check permission about location or enable wifi or connect wifi',
		errCode: -1,
		wifi: WifiInfo
	}


	if (ActivityCompat.checkSelfPermission(getUniActivity()!, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
		// 尚不具备权限，返回错误
		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 = getAppContext();
	if (context != null) {
		const wm = context.getSystemService(
			Context.WIFI_SERVICE
		) as WifiManager;
		// 测试android 12上可以使用
		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)
}