package com.ruoyi.device.service.impl;

import com.ruoyi.device.domain.api.IAircraftDomain;
import com.ruoyi.device.domain.api.IDeviceDomain;
import com.ruoyi.device.domain.api.IDockAircraftDomain;
import com.ruoyi.device.domain.api.IDockDomain;
import com.ruoyi.device.domain.api.IThingsBoardDomain;
import com.ruoyi.device.domain.model.Aircraft;
import com.ruoyi.device.domain.model.Device;
import com.ruoyi.device.domain.model.Dock;
import com.ruoyi.device.domain.model.DockAircraft;
import com.ruoyi.device.domain.model.thingsboard.AttributeMap;
import com.ruoyi.device.domain.model.thingsboard.DeviceInfo;
import com.ruoyi.device.domain.model.thingsboard.constants.DeviceAttributes;
import com.ruoyi.device.service.enums.DeviceType;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Optional;
import java.util.regex.Pattern;

@Service
public class SynService {

    private static final Logger log = LoggerFactory.getLogger(SynService.class);

    private final IThingsBoardDomain iThingsBoardDomain;

    /**
     * 设备名称过滤正则表达式列表（从配置文件读取）
     * 匹配这些正则表达式的设备将被跳过，不进行同步
     */
    @Value("${device.sync.exclude-patterns:}")
    private String excludePatterns;

    /**
     * 编译后的正则表达式模式列表（延迟初始化）
     */
    private List<Pattern> excludePatternList;

    @Autowired
    private IDeviceDomain deviceDomain;

    @Autowired
    private IDockDomain dockDomain;

    @Autowired
    private IAircraftDomain aircraftDomain;

    @Autowired
    private IDockAircraftDomain dockAircraftDomain;

    public SynService(IThingsBoardDomain iThingsBoardDomain) {
        this.iThingsBoardDomain = iThingsBoardDomain;
    }

    /**
     * 初始化设备名称过滤正则表达式列表
     * 延迟初始化，在第一次使用时编译正则表达式
     */
    private void initExcludePatterns() {
        if (excludePatternList == null) {
            excludePatternList = new ArrayList<>();

            if (StringUtils.hasText(excludePatterns)) {
                String[] patterns = excludePatterns.split(",");
                for (String pattern : patterns) {
                    String trimmedPattern = pattern.trim();
                    if (StringUtils.hasText(trimmedPattern)) {
                        try {
                            excludePatternList.add(Pattern.compile(trimmedPattern));
                            log.info("加载设备名称过滤规则: {}", trimmedPattern);
                        } catch (Exception e) {
                            log.error("无效的正则表达式: {}, error={}", trimmedPattern, e.getMessage());
                        }
                    }
                }
            }

            if (excludePatternList.isEmpty()) {
                log.info("未配置设备名称过滤规则");
            }
        }
    }

    /**
     * 判断设备名称是否应该被过滤（跳过同步）
     *
     * @param deviceName 设备名称
     * @return true 表示应该被过滤，false 表示不过滤
     */
    private boolean shouldExcludeDevice(String deviceName) {
        // 延迟初始化
        initExcludePatterns();

        // 如果没有配置过滤规则，不过滤任何设备
        if (excludePatternList.isEmpty()) {
            return false;
        }

        // 检查设备名称是否匹配任何过滤规则
        for (Pattern pattern : excludePatternList) {
            if (pattern.matcher(deviceName).matches()) {
                log.debug("设备 {} 匹配过滤规则 {}，跳过同步", deviceName, pattern.pattern());
                return true;
            }
        }

        return false;
    }

    /**
     * 建立设备到网关的映射关系
     * 优化策略：先识别所有网关设备，然后为每个网关查询其子设备
     *
     * @return 设备ID到网关ID的映射 Map<子设备ID, 网关ID>
     */
    private Map<String, String> buildDeviceToGatewayMap() {
        Map<String, String> deviceToGatewayMap = new HashMap<>();

        try {
            // 获取所有设备
            Iterable<List<DeviceInfo>> allDevices = iThingsBoardDomain.getAllDevices();
            List<DeviceInfo> gatewayDevices = new ArrayList<>();

            // 第一步：识别所有网关设备
            for (List<DeviceInfo> deviceBatch : allDevices) {
                for (DeviceInfo deviceInfo : deviceBatch) {
                    if (deviceInfo.isGateway()) {
                        gatewayDevices.add(deviceInfo);
                    }
                }
            }

            log.info("发现 {} 个网关设备", gatewayDevices.size());

            // 第二步：为每个网关查询其子设备，建立映射关系
            for (DeviceInfo gateway : gatewayDevices) {
                String gatewayId = gateway.getId();
                List<String> childDeviceIds = iThingsBoardDomain.getGatewayChildDevices(gatewayId);

                for (String childDeviceId : childDeviceIds) {
                    deviceToGatewayMap.put(childDeviceId, gatewayId);
                }

                log.debug("网关 {} 有 {} 个子设备", gateway.getName(), childDeviceIds.size());
            }

            log.info("成功建立设备到网关的映射关系，共 {} 个子设备", deviceToGatewayMap.size());

        } catch (Exception e) {
            log.error("建立设备到网关映射关系失败: {}", e.getMessage(), e);
        }

        return deviceToGatewayMap;
    }

    /**
     * 定时任务：同步基础表数据
     * 执行时间：启动后1分钟开始，每2分钟执行一次（可通过配置文件修改）
     * 配置项：device.schedule.print-devices.initial-delay 初始延迟时间（毫秒）
     *        device.schedule.print-devices.fixed-delay 执行间隔时间（毫秒）
     *
     * 优化策略：
     * 1. 先识别所有网关设备
     * 2. 遍历每个网关，同步网关及其子设备
     * 3. 同步非网关的独立设备（机场和无人机）
     */
    @Scheduled(initialDelayString = "${device.schedule.update-devices.initial-delay:60000}",
            fixedDelayString = "${device.schedule.update-devices.fixed-delay:120000}")
    public void updateDevicesScheduled() {
        try {
            log.info("========== 开始执行定时任务：同步基础表数据 ==========");

            int totalCount = 0;
            int skippedCount = 0;

            // 第一步：直接获取所有网关设备（服务端过滤）
            Iterable<List<DeviceInfo>> gatewayDevices = iThingsBoardDomain.getAllGatewayDevices();

            // 第二步：遍历每个网关，同步网关及其子设备
            for (List<DeviceInfo> gatewayBatch : gatewayDevices) {
                for (DeviceInfo gatewayInfo : gatewayBatch) {
                    try {
                        // 按照名字过滤网关设备
                        if (shouldExcludeDevice(gatewayInfo.getName())) {
                            log.info("网关 {} 匹配过滤规则，跳过同步", gatewayInfo.getName());
                            skippedCount++;
                            continue;
                        }

                        // 同步网关设备本身
                        log.info("开始同步网关: {}", gatewayInfo.getName());
                        syncDevice(gatewayInfo, DeviceType.GATEWAY, null);
                        totalCount++;

                        // 获取该网关的所有子设备ID
                        List<String> childDeviceIds = iThingsBoardDomain.getGatewayChildDevices(gatewayInfo.getId());
                        log.info("网关 {} 有 {} 个子设备", gatewayInfo.getName(), childDeviceIds.size());

                        // 遍历该网关的子设备
                        for (String childDeviceId : childDeviceIds) {
                            // 通过API获取子设备信息
                            DeviceInfo childDeviceInfo = iThingsBoardDomain.getDeviceInfo(childDeviceId);
                            if (childDeviceInfo == null) {
                                log.warn("子设备 {} 不存在，跳过", childDeviceId);
                                skippedCount++;
                                continue;
                            }

                            // 按照名字过滤子设备
                            if (shouldExcludeDevice(childDeviceInfo.getName())) {
                                log.info("子设备 {} 匹配过滤规则，跳过同步", childDeviceInfo.getName());
                                skippedCount++;
                                continue;
                            }

                            try {
                                // 获取子设备属性
                                AttributeMap attributes = iThingsBoardDomain.getPredefinedDeviceAttributes(childDeviceId);

                                // 判断设备类型
                                DeviceType deviceType = determineDeviceType(childDeviceInfo, attributes);

                                // 同步子设备（传入网关ID）
                                Long deviceId = syncDevice(childDeviceInfo, deviceType, gatewayInfo.getId());

                                // 根据设备类型进行不同的处理
                                syncDeviceByType(deviceId, childDeviceInfo.getName(), deviceType, attributes);

                                totalCount++;

                            } catch (Exception e) {
                                log.error("同步网关子设备失败: gatewayName={}, childDeviceId={}, error={}",
                                        gatewayInfo.getName(), childDeviceId, e.getMessage(), e);
                            }
                        }

                    } catch (Exception e) {
                        log.error("同步网关失败: gatewayName={}, error={}",
                                gatewayInfo.getName(), e.getMessage(), e);
                    }
                }
            }

            log.info("========== 数据同步任务完成，共同步 {} 个设备，跳过 {} 个设备 ==========", totalCount, skippedCount);
        } catch (Exception e) {
            log.error("数据同步任务执行失败: {}", e.getMessage(), e);
        }
    }

    /**
     * 根据设备类型进行不同的同步处理
     *
     * @param deviceId 设备主键ID
     * @param deviceName 设备名称
     * @param deviceType 设备类型
     * @param attributes 设备属性
     */
    private void syncDeviceByType(Long deviceId, String deviceName, DeviceType deviceType, AttributeMap attributes) {
        if (deviceType == DeviceType.DOCK) {
            // 机场：同步机场表
            syncDock(deviceId, deviceName);

            // 获取机场挂载的无人机SN号
            Optional<String> subDeviceSnOpt = attributes.get(DeviceAttributes.SUB_DEVICE_SN);
            if (subDeviceSnOpt.isPresent() && StringUtils.hasText(subDeviceSnOpt.get())) {
                String aircraftSn = subDeviceSnOpt.get();
                Device aircraftDevice = findDeviceBySn(aircraftSn);
                if (aircraftDevice != null) {
                    syncDockAircraft(deviceId, aircraftDevice.getDeviceId());
                }
            }
        } else if (deviceType == DeviceType.AIRCRAFT) {
            // 无人机：同步无人机表
            syncAircraft(deviceId, deviceName);
        }
        // 网关类型不需要额外处理
    }

    /**
     * 判断设备类型
     * 优化后的判断逻辑：
     * 1. 优先使用 ThingsBoard 标准的 additionalInfo.gateway 字段判断网关
     * 2. 对于非网关设备，通过 dock_sn 属性区分机场和无人机
     *
     * @param deviceInfo ThingsBoard设备信息
     * @param attributes 设备属性
     * @return 设备类型
     */
    private DeviceType determineDeviceType(DeviceInfo deviceInfo, AttributeMap attributes) {
        String deviceName = deviceInfo.getName();

        // 1. 使用 ThingsBoard 标准方式判断网关：检查 additionalInfo 中的 gateway 字段
        if (deviceInfo.isGateway()) {
            return DeviceType.GATEWAY;
        }

        // 2. 非网关设备：通过 dock_sn 属性区分机场和无人机
        Optional<String> dockSnOpt = attributes.get(DeviceAttributes.DOCK_SN);

        if (dockSnOpt.isPresent() && StringUtils.hasText(dockSnOpt.get())) {
            String dockSn = dockSnOpt.get();
            // dock_sn 等于设备名称 -> 机场
            // dock_sn 不等于设备名称 -> 无人机（挂载在该机场下）
            return deviceName.equals(dockSn) ? DeviceType.DOCK : DeviceType.AIRCRAFT;
        }

        // dock_sn 属性不存在或为空，无法判断设备类型
        throw new IllegalStateException("无法确定设备类型：设备 " + deviceName + " 缺少 dock_sn 属性");
    }

    /**
     * 同步设备数据
     *
     * @param deviceInfo ThingsBoard设备信息
     * @param deviceType 设备类型
     * @param gatewayId 网关设备ID（从映射中获取，避免重复API调用）
     * @return 设备主键ID
     */
    private Long syncDevice(DeviceInfo deviceInfo, DeviceType deviceType, String gatewayId) {
        String iotDeviceId = deviceInfo.getId();
        String deviceName = deviceInfo.getName();
        String deviceSn = deviceName; // 使用设备名称作为SN号,网关其实是没有SN号的

        log.info("开始同步设备: iotDeviceId={}, deviceName={}, deviceType={}, gatewayId={}",
                iotDeviceId, deviceName, deviceType, gatewayId);

        // 查询设备是否已存在
        Device existingDevice = deviceDomain.selectDeviceByIotDeviceId(iotDeviceId);

        if (existingDevice == null) {
            // 设备不存在，插入新设备
            Device newDevice = new Device();
            newDevice.setDeviceName(deviceName);
            newDevice.setIotDeviceId(iotDeviceId);
            newDevice.setDeviceType(deviceType.getCode());
            newDevice.setDeviceSn(deviceSn);
            newDevice.setGateway(gatewayId);
            newDevice.setCreateBy("system");

            log.info("准备插入新设备: deviceName={}, deviceType={}, deviceSn={}",
                    deviceName, deviceType, deviceSn);
            deviceDomain.insertDevice(newDevice);

            Long deviceId = newDevice.getDeviceId();
            log.info("插入新设备成功: iotDeviceId={}, deviceName={}, deviceType={}, 返回deviceId={}",
                    iotDeviceId, deviceName, deviceType, deviceId);
            return deviceId;
        } else {
            // 设备已存在，检查是否需要更新
            boolean needUpdate = false;

            if (!Objects.equals(existingDevice.getDeviceName(), deviceName)) {
                existingDevice.setDeviceName(deviceName);
                needUpdate = true;
            }
            if (!Objects.equals(existingDevice.getDeviceType(), deviceType.getCode())) {
                existingDevice.setDeviceType(deviceType.getCode());
                needUpdate = true;
            }
            if (!Objects.equals(existingDevice.getDeviceSn(), deviceSn)) {
                existingDevice.setDeviceSn(deviceSn);
                needUpdate = true;
            }
            if (!Objects.equals(existingDevice.getGateway(), gatewayId)) {
                existingDevice.setGateway(gatewayId);
                needUpdate = true;
            }

            if (needUpdate) {
                existingDevice.setUpdateBy("system");
                deviceDomain.updateDevice(existingDevice);
                log.info("更新设备: iotDeviceId={}, deviceName={}, deviceType={}", iotDeviceId, deviceName, deviceType);
            }

            return existingDevice.getDeviceId();
        }
    }

    /**
     * 同步机场数据
     *
     * @param deviceId 设备主键ID
     * @param deviceName 设备名称
     */
    private void syncDock(Long deviceId, String deviceName) {
        log.info("开始同步机场: deviceId={}, deviceName={}", deviceId, deviceName);

        // 查询机场是否已存在
        Dock existingDock = dockDomain.selectDockByDeviceId(deviceId);

        if (existingDock == null) {
            // 机场不存在，插入新机场
            Dock newDock = new Dock();
            newDock.setDockName(deviceName);
            newDock.setDeviceId(deviceId);
            newDock.setCreateBy("system");

            log.info("准备插入新机场: deviceId={}, dockName={}", deviceId, deviceName);
            dockDomain.insertDock(newDock);
            log.info("插入新机场成功: deviceId={}, dockName={}, dockId={}",
                    deviceId, deviceName, newDock.getDockId());
        } else {
            log.info("机场已存在，跳过插入: deviceId={}, dockName={}", deviceId, deviceName);
        }
        // 机场已存在，无需更新
    }

    /**
     * 同步无人机数据
     *
     * @param deviceId 设备主键ID
     * @param deviceName 设备名称
     * @return 无人机主键ID
     */
    private Long syncAircraft(Long deviceId, String deviceName) {
        log.info("开始同步无人机: deviceId={}, deviceName={}", deviceId, deviceName);

        // 查询无人机是否已存在
        Aircraft existingAircraft = aircraftDomain.selectAircraftByDeviceId(deviceId);

        if (existingAircraft == null) {
            // 无人机不存在，插入新无人机
            Aircraft newAircraft = new Aircraft();
            newAircraft.setAircraftName(deviceName);
            newAircraft.setDeviceId(deviceId);
            newAircraft.setCreateBy("system");

            log.info("准备插入新无人机: deviceId={}, aircraftName={}", deviceId, deviceName);
            aircraftDomain.insertAircraft(newAircraft);

            Long aircraftId = newAircraft.getAircraftId();
            log.info("插入新无人机成功: deviceId={}, aircraftName={}, aircraftId={}",
                    deviceId, deviceName, aircraftId);
            return aircraftId;
        } else {
            log.info("无人机已存在，跳过插入: deviceId={}, aircraftName={}", deviceId, deviceName);
        }
        // 无人机已存在，无需更新
        return existingAircraft.getAircraftId();
    }

    /**
     * 根据设备SN号查找设备
     *
     * @param deviceSn 设备SN号
     * @return 设备信息
     */
    private Device findDeviceBySn(String deviceSn) {
        Device queryDevice = new Device();
        queryDevice.setDeviceSn(deviceSn);
        List<Device> devices = deviceDomain.selectDeviceList(queryDevice);
        return (devices != null && !devices.isEmpty()) ? devices.get(0) : null;
    }

    /**
     * 同步机场无人机关联数据
     * 按照一个机场只会挂载一台无人机的逻辑进行处理
     *
     * @param dockDeviceId 机场设备主键ID
     * @param aircraftDeviceId 无人机设备主键ID
     */
    private void syncDockAircraft(Long dockDeviceId, Long aircraftDeviceId) {
        // 获取机场主键
        Dock dock = dockDomain.selectDockByDeviceId(dockDeviceId);
        if (dock == null) {
            log.warn("机场不存在，无法同步机场无人机关联: dockDeviceId={}", dockDeviceId);
            return;
        }

        // 获取无人机主键
        Aircraft aircraft = aircraftDomain.selectAircraftByDeviceId(aircraftDeviceId);
        if (aircraft == null) {
            log.warn("无人机不存在，无法同步机场无人机关联: aircraftDeviceId={}", aircraftDeviceId);
            return;
        }

        Long dockId = dock.getDockId();
        Long aircraftId = aircraft.getAircraftId();

        // 查询该机场是否已有关联
        List<DockAircraft> existingRelations = dockAircraftDomain.selectDockAircraftByDockId(dockId);

        if (existingRelations == null || existingRelations.isEmpty()) {
            // 机场没有关联，插入新关联
            DockAircraft newRelation = new DockAircraft();
            newRelation.setDockId(dockId);
            newRelation.setAircraftId(aircraftId);
            newRelation.setCreateBy("system");

            dockAircraftDomain.insertDockAircraft(newRelation);
            log.info("插入机场无人机关联: dockId={}, aircraftId={}", dockId, aircraftId);
        } else {
            // 机场已有关联，检查是否需要更新
            DockAircraft existingRelation = existingRelations.get(0);
            if (!Objects.equals(existingRelation.getAircraftId(), aircraftId)) {
                // 无人机发生变化，更新关联
                existingRelation.setAircraftId(aircraftId);
                existingRelation.setUpdateBy("system");
                dockAircraftDomain.updateDockAircraft(existingRelation);
                log.info("更新机场无人机关联: dockId={}, aircraftId={}", dockId, aircraftId);
            }
        }
    }
}