import throttle from 'lodash/throttle';
import dayjs from 'dayjs';
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, siteId) {
		this.userInfo = userInfo;
		this.messageApi = messageApi;
		this.siteId = siteId;

		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.deviceStatusChangedMsg = null;
		this.onIsFinished = null;
		this.onIsExecuting = null;
		this.handleArrivedPoint = null;

		// 全量设备实时状态（mapPush）连接
		this.mapPushWs = null;
		this.mapPushManualClose = false;
		this.mapPushReconnectTimer = null;
		this.onMapPush = 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();

	}
	disconnect() {
		console.log('DeviceController disconnect: 断开 WebSocket');
		wsManager.close();
		this.connectedDeviceSn = null;
		this.currentDevice = null;
		this.wsDeviceInfo = {};
		this.locationInfo = {};
		this.isControlled = false;
		this.onControlStatusChange?.(false);
	}

	// ============ 全量设备实时状态（mapPush）连接 ============
	// 进入实时监控页时连接一次，接收后端广播的所有设备状态；退出页面时调用 closeMapPush 断开。
	initMapPush(onMapPush) {
		console.log('DeviceController initMapPush: 连接全量设备 WebSocket');
		this.onMapPush = onMapPush || null;
		this.mapPushManualClose = false;
		this.connectMapPush();
	}

	connectMapPush() {
		if (this.mapPushWs && this.mapPushWs.readyState === WebSocket.OPEN) return;
		try {
			this.mapPushManualClose = false;
			const ws = new WebSocket(this.wsUrl);
			this.mapPushWs = ws;

			ws.onopen = () => {
				ws.send(JSON.stringify({
					type: 'mapPush',
					token: this.userInfo?.token,
					siteId: this.siteId,
					userName: this.userInfo?.username,
					deviceId: '',
				}));
			};

			ws.onmessage = (event) => {
				let msg = null;
				try { msg = JSON.parse(event.data); } catch (e) { return; }

				console.log('[DeviceController] 收到全量设备状态  初始状态', msg);
				if (msg?.type == 'mapPush') {
					const list = Array.isArray(msg?.data) && msg.data.length
						? msg.data
						: [];
					if (!list.length) return;

					const next = {};
					list.forEach((it) => {
						const key = String(it?.id ?? '');
						if (!key) return;
						next[key] = {
							id: key,
							lng: String(it?.lng ?? it?.lon ?? it?.longitude),
							lat: String(it?.lat ?? it?.latitude),
							yaw: it?.y,
							fix: it?.f !== undefined ? String(it.f) : undefined,
							fixStatus: it?.f !== undefined ? String(it.f) : undefined,
							altitude: it?.a !== undefined ? String(it.a) : undefined,
							status: it?.s ?? it?.status,
							taskId: it?.t ?? it?.taskId ?? null,
							battery: it?.b !== undefined ? Number(it.b) : (it?.batteryLevel !== undefined ? Number(it.batteryLevel) : undefined),
							hasAlarm: !!it?.ha || !!it?.hasAlarm,
							updateTime: dayjs().format('YYYY-MM-DD HH:mm:ss'),
							controlMode: it?.cm ?? it?.controlMode,
						};
					});
					console.log('[DeviceController]  收到全量设备状态', next);
					this.onMapPush?.(next);
				}
				if (msg?.type == 'device_task_change') {
					if (msg.status == "FINISH") {
						console.log('task finish');
						this.onIsFinished?.(true);
					}
					if (msg.status == "EXECUTING" || msg.status == "CANCELLED" || msg.status == "FAILED") {
						this.onIsExecuting?.(true);
					}

				}

				if (msg?.type == 'device_status_changed') {
					this.deviceStatusChangedMsg?.(msg);
				}

				if (msg?.type == 'route_post') {
					console.log('route_post');
					this.onRoutePost?.(msg);
				}



			};

			ws.onerror = () => {
				console.error('[DeviceController] mapPush WebSocket 错误');
			};

			ws.onclose = () => {
				if (this.mapPushWs === ws) this.mapPushWs = null;
				if (!this.mapPushManualClose) {
					this.mapPushReconnectTimer = setTimeout(() => this.connectMapPush(), 5000);
				}
			};
		} catch (err) {
			console.error('[DeviceController] 连接全量设备 WebSocket 失败', err);
			this.mapPushReconnectTimer = setTimeout(() => this.connectMapPush(), 5000);
		}
	}

	closeMapPush() {
		this.mapPushManualClose = true;
		if (this.mapPushReconnectTimer) {
			clearTimeout(this.mapPushReconnectTimer);
			this.mapPushReconnectTimer = null;
		}
		if (this.mapPushWs) {
			this.mapPushWs.onopen = null;
			this.mapPushWs.onmessage = null;
			this.mapPushWs.onerror = null;
			this.mapPushWs.onclose = null;
			try { this.mapPushWs.close(); } catch (e) { /* ignore */ }
			this.mapPushWs = null;
		}
	}

	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);

		// 切换任务/设备：先清掉上一个设备的实时坐标，避免轨迹残留到新设备
		this.onLocationInfoUpdate?.(null);

		wsManager.close();

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

			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);

		// 切换设备：清掉上一个设备的实时坐标，避免轨迹残留
		this.onLocationInfoUpdate?.(null);

		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;
				});
				// 切换任务/切换设备时，忽略上一个设备遗留的实时数据
				if (data?.deviceId && data.deviceId !== this.connectedDeviceSn) {
					break;
				}
				this.wsDeviceInfo = data;
				this.onDeviceInfoUpdate?.(data);
				break;
			}
			case 'locationInfo': {
				const data = {};
				msg.data.forEach((item) => {
					data[item.name] = item.value;
				});
				// 切换任务/切换设备时，忽略上一个设备遗留的实时经纬度，只显示当前连接设备的实时轨迹
				if (data?.deviceId && data.deviceId !== this.connectedDeviceSn) {
					break;
				}
				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": {
				console.log('task change:', msg);

				if (msg.status == "FINISH") {
					console.log('task finish');
					this.onIsFinished?.(true);
				}
				if (msg.status == "EXECUTING") {
					this.onIsExecuting?.(true);
				}

				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':
				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;

			case 'device_status_changed':
				this.deviceStatusChangedMsg?.(msg);
				break;

			case 'remoteControl':

				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,
		});
	}
}