import throttle from 'lodash/throttle';
import { wsManager } from '../WebSocketManager.ts';
import {
	getJurisdiction,
	releaseControl
} from '../../api/device.ts';

import envConfig from '../../../env';
import i18n from '../../i18n';

export default class DeviceController {
	constructor(userInfo, messageApi) {
		this.userInfo = userInfo;
		this.messageApi = messageApi;

		this.wsUrl =
			envConfig.WS_URL || 'wss://ri.satabot.com/ws/';

		this.connectedDeviceSn = null;
		this.currentDevice = null;

		this.requestDeviceId = '';

		this.isControlled = false;
		this.isRequestControl = false;
		this.hasControlRight = false;

		this.wsStatus = 'disconnected';
		this.wsDeviceInfo = {};
		this.locationInfo = {};

		this.controlTimeout = null;
		this.keepAliveInterval = null;

		this.onDeviceInfoUpdate = null;
		this.onLocationInfoUpdate = null;

		this.onControlStatusChange = null;
		this.onWsStatusChange = null;
		this.onHasControlRightChange = null;
		this.onRequestControlStatusChange = null;
		this.onPermissionRequest = null;
		this.onRoutePost = null;
		this.onIsFinished = null;
		this.handleArrivedPoint = null;

		this.handleWsMessage = this.handleWsMessage.bind(this);
		this.handleWsStatus = this.handleWsStatus.bind(this);
		this.handleVisibilityChange = this.handleVisibilityChange.bind(this);
		this.handleBeforeUnload = this.handleBeforeUnload.bind(this);

		this.sendGamepad = throttle(
			this.sendGamepad.bind(this),
			50,
			{ leading: true, trailing: true }
		);
	}

	init() {
		this.unSubMessage = wsManager.onMessage(this.handleWsMessage);
		this.unSubStatus = wsManager.onStatusChange(this.handleWsStatus);

		document.addEventListener('visibilitychange', this.handleVisibilityChange);
		document.addEventListener('beforeunload', this.handleBeforeUnload);
	}
	levae() {
		wsManager.close();

	}

	handleVisibilityChange() {
		if (document.visibilityState === 'hidden') {
			console.log('Page hidden, release control');
			//this.release();
			wsManager.close();
			this.connectedDeviceSn = null;

			this.isControlled = false;
			this.onControlStatusChange?.(false);
		}
		if (document.visibilityState === 'visible' && this.currentDevice) {
			if (!this.currentDevice?.serialNumber) return;
			console.log('Page visible, reconnect WebSocket');
			setTimeout(() => {
				this.connectDevice(this.currentDevice);
			}, 500);
		}
	}

	handleBeforeUnload() {
		console.log('Browser closing/refreshing, release control');
		this.release();
	}

	startKeepAlive() {
		this.keepAliveInterval = setInterval(() => {
			if (
				this.connectedDeviceSn &&
				this.wsStatus !== 'connected' &&
				this.currentDevice?.serialNumber
			) {
				console.log('Keep alive: reconnect WebSocket');
				this.connectDevice(this.currentDevice);
			}
		}, 8000);
	}

	async release() {
		if (!this.connectedDeviceSn) return;
		const data = {
			platform: 'web',
			type: 1,
			deviceId: this.connectedDeviceSn,
			token: this.userInfo.token,
		};
		const url = `${envConfig.baseURL}/forward/device/releaseControl`;

		try {
			await releaseControl(data);
			const blob = new Blob([JSON.stringify(data)], { type: 'application/json' });
			navigator.sendBeacon(url, blob);
			console.log('releaseControl sent');
		} catch (e) {
			console.error('Failed to send releaseControl:', e);
		}
	}

	destroy() {
		this.clearControlTimeout();

		if (this.keepAliveInterval) {
			clearInterval(this.keepAliveInterval);
			this.keepAliveInterval = null;
		}

		document.removeEventListener('visibilitychange', this.handleVisibilityChange);
		document.removeEventListener('beforeunload', this.handleBeforeUnload);

		this.release();
		this.levae();

		this.unSubMessage?.();
		this.unSubStatus?.();

		this.connectedDeviceSn = null;
	}

	handleWsStatus(status) {
		this.wsStatus = status;
		this.onWsStatusChange?.(status);

		if (status === 'disconnected') {
			this.isControlled = false;
			this.onControlStatusChange?.(false);
		}
	}

	async connectDevice(device) {
		if (!device) return;

		this.currentDevice = device;
		if (!device.serialNumber) return;

		const sn = device.serialNumber;

		this.connectedDeviceSn = null;
		this.wsDeviceInfo = {};
		this.locationInfo = {};
		this.isControlled = false;
		this.onControlStatusChange?.(false);

		wsManager.close();

		try {
			console.log('Connecting to', this.wsUrl);
			wsManager.connect(sn, this.wsUrl);
			this.connectedDeviceSn = sn;

			await this.getControl(sn);
		} catch (err) {
			console.error(err);
			this.messageApi.error(i18n.t('devices.failedFixed22'));
		}
	}

	async switchDevice(device) {
		if (!device) return;
		if (!device.serialNumber) return;

		const newSn = device.serialNumber;

		if (this.connectedDeviceSn === newSn && this.wsStatus === 'connected') {
			console.log('switchDevice: same device, skip');
			return;
		}

		console.log('Connecting to switchDevice: switching to', newSn);

		this.currentDevice = device;
		this.connectedDeviceSn = newSn;
		this.wsDeviceInfo = {};
		this.locationInfo = {};
		this.isControlled = false;
		this.onControlStatusChange?.(false);

		wsManager.send({
			type: 'AUTH',
			token: this.userInfo.token,
			userName: this.userInfo.username,
			deviceId: newSn,
		});

		await this.getControl(newSn);
	}

	async getControl(serialnum) {
		try {
			const res = await getJurisdiction({
				platform: 'web',
				deviceId: serialnum,
				token: this.userInfo.token,
			});

			this.isControlled = res?.code === 200 && res?.data?.remoteControl === true;
			this.onControlStatusChange?.(this.isControlled);
		} catch (err) {
			console.error(err);
			this.isControlled = false;
			this.onControlStatusChange?.(false);
		}
	}

	requestControl() {
		if (this.isRequestControl) return;


		this.isRequestControl = true;
		this.onRequestControlStatusChange?.(true);

		this.messageApi.loading({
			key: 'control',
			content: i18n.t('devices.control2'),
			duration: 0,
		});

		this.sendPermissionRequest(true, 'switchPermission');
		this.clearControlTimeout();

		this.controlTimeout = setTimeout(() => {
			if (!this.isRequestControl) return;
			this.isRequestControl = false;
			this.onRequestControlStatusChange?.(false);
			this.messageApi.destroy('control');
			this.messageApi.error(i18n.t('devices.fixed2ControlFixed2'));
			this.clearControlTimeout();

		}, 20000);
	}

	clearControlTimeout() {
		if (this.controlTimeout) {
			clearTimeout(this.controlTimeout);
			this.controlTimeout = null;
		}
	}

	sendPermissionRequest(data, type) {
		wsManager.send({
			type,
			switchResult: data,
			token: this.userInfo.token,
			deviceId: type === 'switchPermission' ? this.connectedDeviceSn : this.requestDeviceId,
			userName: this.userInfo.username,
		});
	}

	handleWsMessage(msg) {
		console.log('WS message:', msg);
		switch (msg.type) {
			case 'deviceInfo': {
				const data = {};
				msg.data.forEach((item) => {
					data[item.name] = item.value;
				});
				this.wsDeviceInfo = data;
				this.onDeviceInfoUpdate?.(data);
				break;
			}
			case 'locationInfo': {
				const data = {};
				msg.data.forEach((item) => {
					data[item.name] = item.value;
				});
				this.locationInfo = data;
				this.onLocationInfoUpdate?.(data);
				break;
			}

			case 'AUTH': {
				if (msg.isAuth) {
					this.getControl(this.connectedDeviceSn);
				}
				break;
			}

			case 'switchResult': {

				this.clearControlTimeout();
				this.isRequestControl = false;
				this.onRequestControlStatusChange?.(false);

				if (msg?.success === false || msg?.respond?.switchResult === false) {
					this.isControlled = false;
					this.onControlStatusChange?.(false);
					this.messageApi.error({ key: 'control', content: msg.message || i18n.t('devices.controlFailed') });
					return;
				}
				this.isControlled = true;
				this.onControlStatusChange?.(true);
				this.messageApi.success({ key: 'control', content: i18n.t('devices.fixed2ControlFixed2SuccessFixed2') });
				break;
			}
			case "device_task_change": {
				if (msg.deviceId != this.connectedDeviceSn) return;
				this.onIsFinished?.(true);
				console.log('task change:', msg);
				break;
			}
			case "device_task_arrive_point": {
				if (msg.deviceId != this.connectedDeviceSn) return;
				this.handleArrivedPoint?.(msg.entity);
				console.log('arrive point:', msg);
				break;
			}

			case 'switchPermission': {
				const platform = (msg.platform || '').toLowerCase();
				if (!platform || platform === 'null') return;

				this.requestDeviceId = msg.deviceId;
				this.onPermissionRequest?.({
					title: i18n.t('devices.s2'),
					content: i18n.t('devices.platformRequestControl', { platform: msg.platform }),
				});
				break;
			}

			case 'detectionReport':
				if (msg.data?.deviceId !== this.connectedDeviceSn) return;
				const { isSecure, obstacle } = msg.data;
				if (isSecure) return;
				const type = obstacle?.type;
				const distance = (obstacle?.distance || 0).toFixed(2);
				const types = { 0: i18n.t('constants.locationUnknown'), 1: i18n.t('devices.obstaclePerson'), 2: i18n.t('devices.obstacleVehicle'), 3: i18n.t('devices.obstacleFence'), 4: i18n.t('devices.obstaclePothole'), 5: i18n.t('devices.obstacleGrass') };
				this.messageApi.warning({
					key: 'obstacle-warning',
					content: i18n.t('devices.obstacleDetectedReport', { obstacle: types[type] ?? i18n.t('devices.unknownObject'), distance }),
					duration: 3,
				});
				break;

			case 'route_post':
				console.log('route post:', msg);
				if (msg.deviceId) {
					this.onRoutePost?.(msg);
				}

				break;

			default:
				break;
		}
	}

	sendGamepad(state) {
		if (!this.isControlled || !this.connectedDeviceSn) return;
		wsManager.send({
			type: 'remoteControl',
			remoteData: state,
			token: this.userInfo.token,
			userName: this.userInfo.username,
		});
	}
}