package com.cmvr.resource.service;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.cmvr.common.utils.DateUtils;
import com.cmvr.edge.client.manage.GrpcServiceManager;
import com.cmvr.quic.gateway.v1.ManagedDeviceStatus;
import com.cmvr.quic.gateway.v1.NodeEvent;
import com.cmvr.quic.gateway.v1.NodeEventType;
import com.cmvr.quic.gateway.v1.NodeSnapshot;
import com.cmvr.resource.config.ResourceRobotStateProperties;
import com.cmvr.resource.domain.ResourceDevice;
import com.cmvr.resource.domain.ResourceRobot;
import com.cmvr.resource.domain.ResourceRobotTerminal;
import com.cmvr.resource.domain.ResourceTerminal;
import com.cmvr.resource.mapper.ResourceDeviceMapper;
import com.cmvr.resource.mapper.ResourceRobotMapper;
import com.cmvr.resource.mapper.ResourceRobotTerminalMapper;
import com.cmvr.resource.mapper.ResourceTerminalMapper;
import lombok.RequiredArgsConstructor;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Objects;
import java.util.UUID;

@Service
@RequiredArgsConstructor
public class ResourceQuicStateSynchronizer {
    private static final Logger log = LoggerFactory.getLogger(ResourceQuicStateSynchronizer.class);
    private static final int AGV_DEVICE_KIND = 1;

    private final ResourceRobotMapper robotMapper;
    private final ResourceDeviceMapper deviceMapper;
    private final ResourceTerminalMapper terminalMapper;
    private final ResourceRobotTerminalMapper robotTerminalMapper;
    private final ResourceRobotStateProperties stateProperties;
    private final GrpcServiceManager grpcServiceManager;

    @Value("${cmvr.quic.grpc-host-source:observed-source}")
    private String grpcHostSource;

    @Transactional(rollbackFor = Exception.class)
    public boolean synchronize(NodeEvent event) {
        NodeSnapshot node = event.getNode();
        String robotId = StringUtils.trimToNull(node.getRobotId());
        if (robotId == null || stateProperties.isVirtualRobot(robotId)) {
            return false;
        }
        ResourceRobot robot = robotMapper.selectByRobotIdentity(robotId);
        if (robot == null || "1".equals(robot.getArchivedStatus())) {
            log.warn("QUIC robot is not registered in resource center, robotId={}, nodeId={}",
                    robotId, node.getNodeId());
            return false;
        }

        boolean offline = event.getType() == NodeEventType.NODE_EVENT_TYPE_OFFLINE || !node.getOnline();
        if (offline && StringUtils.isNotBlank(robot.getQuicSessionId())
                && !robot.getQuicSessionId().equals(node.getSessionId())) {
            return true;
        }

        String oldHost = robot.getIpAddress();
        Long oldPort = robot.getPort();
        Date eventTime = new Date(event.getEventTimeUnixMs() == 0
                ? System.currentTimeMillis() : event.getEventTimeUnixMs());
        if (!offline) {
            robot.setIpAddress(resolveGrpcHost(node));
            robot.setPort(node.getGrpcEndpoint().getPort() == 0
                    ? null : (long) node.getGrpcEndpoint().getPort());
        }
        robot.setConnectStatus(offline ? "0" : "1");
        robot.setQuicNodeId(node.getNodeId());
        robot.setQuicSessionId(node.getSessionId());
        robot.setQuicBootId(node.getBootId());
        robot.setObservedIp(node.getObservedSourceIp());
        robot.setSoftwareVersion(node.getSoftwareVersion());
        if (event.getType() == NodeEventType.NODE_EVENT_TYPE_REGISTERED
                || event.getType() == NodeEventType.NODE_EVENT_TYPE_HEARTBEAT) {
            robot.setLastHeartbeatTime(eventTime);
        }
        if (offline || !hasEnabledAgv(node)) {
            robot.setStatus("1");
        }
        robot.setUpdateTime(DateUtils.getNowDate());
        robotMapper.updateQuicRuntimeState(robot);
        synchronizeTerminal(robotId, node, eventTime, offline);

        if (offline) {
            deviceMapper.markAllOffline(robotId, eventTime);
        } else {
            synchronizeDevices(robotId, node, eventTime);
        }
        if (offline || !Objects.equals(oldHost, robot.getIpAddress())
                || !Objects.equals(oldPort, robot.getPort())) {
            grpcServiceManager.invalidateRobot(robotId);
        }
        return true;
    }

    @Transactional(rollbackFor = Exception.class)
    public int expireStaleRobots() {
        Date now = DateUtils.getNowDate();
        Date cutoff = stateProperties.heartbeatCutoff(now);
        int count = 0;
        for (ResourceRobot robot : robotMapper.selectStaleConnected(
                cutoff, stateProperties.normalizedVirtualRobotIds())) {
            if (robotMapper.markHeartbeatExpiredOffline(robot.getId(), cutoff, now) == 0) {
                continue;
            }
            deviceMapper.markAllOffline(robot.getRobotId(), now);
            grpcServiceManager.invalidateRobot(robot.getRobotId());
            count++;
        }
        return count;
    }

    private void synchronizeDevices(String robotId, NodeSnapshot node, Date eventTime) {
        List<String> reportedIds = new ArrayList<>();
        for (ManagedDeviceStatus status : node.getDeviceManager().getDevicesList()) {
            String deviceId = StringUtils.trimToNull(status.getDeviceId());
            if (deviceId == null) {
                continue;
            }
            reportedIds.add(deviceId);
            List<ResourceDevice> matches = deviceMapper.selectByIdentity(robotId, deviceId);
            if (matches.size() > 1) {
                log.error("Duplicate resource device identity, robotId={}, deviceId={}", robotId, deviceId);
                continue;
            }
            ResourceDevice device = matches.isEmpty()
                    ? createDevice(robotId, deviceId, eventTime) : matches.get(0);
            device.setDeviceKind(status.getKind());
            device.setTypeName(status.getTypeName());
            device.setEnabled(status.getEnabled() ? "1" : "0");
            device.setManagerState(status.getManagerState());
            device.setHealthStatus(status.getHealth());
            device.setOnlineStatus("1");
            device.setHasError(status.getHasError() ? "1" : "0");
            device.setErrorMessage(status.getErrorMessage());
            device.setStatusUpdatedTime(status.getStatusUpdatedAtUnixMs() == 0
                    ? null : new Date(status.getStatusUpdatedAtUnixMs()));
            device.setLastSeenTime(eventTime);
            device.setOfflineTime(null);
            device.setUpdateBy("quic");
            device.setUpdateTime(eventTime);
            if (matches.isEmpty()) {
                deviceMapper.insert(device);
            } else {
                deviceMapper.updateRuntimeState(device);
            }
        }
        deviceMapper.markMissingOffline(robotId, reportedIds, eventTime);
    }

    private ResourceDevice createDevice(String robotId, String deviceId, Date now) {
        ResourceDevice device = new ResourceDevice();
        device.setId(UUID.randomUUID().toString().replace("-", ""));
        device.setRobotId(robotId);
        device.setDeviceId(deviceId);
        device.setDeviceName(deviceId);
        device.setCreateBy("quic");
        device.setCreateTime(now);
        return device;
    }

    private void synchronizeTerminal(String robotId, NodeSnapshot node, Date eventTime, boolean offline) {
        String terminalCode = StringUtils.trimToNull(node.getNodeId());
        if (terminalCode == null) {
            return;
        }
        ResourceTerminal terminal = terminalMapper.selectByCode(terminalCode);
        boolean newTerminal = terminal == null;
        if (newTerminal) {
            terminal = new ResourceTerminal();
            terminal.setId(UUID.randomUUID().toString().replace("-", ""));
            terminal.setTerminalCode(terminalCode);
            terminal.setTerminalName(terminalCode);
            terminal.setCreateBy("quic");
            terminal.setCreateTime(eventTime);
        }
        terminal.setIpAddress(StringUtils.trimToNull(node.getObservedSourceIp()));
        terminal.setPort(node.getGrpcEndpoint().getPort() == 0
                ? null : (long) node.getGrpcEndpoint().getPort());
        terminal.setSoftwareVersion(node.getSoftwareVersion());
        terminal.setConnectStatus(offline ? "0" : "1");
        terminal.setLastHeartbeatTime(eventTime);
        terminal.setStatus(offline ? "OFFLINE" : "ONLINE");
        terminal.setUpdateBy("quic");
        terminal.setUpdateTime(eventTime);
        if (newTerminal) {
            terminalMapper.insert(terminal);
        } else {
            terminalMapper.updateById(terminal);
        }

        ResourceRobotTerminal binding = robotTerminalMapper.selectOne(
                new LambdaQueryWrapper<ResourceRobotTerminal>()
                        .eq(ResourceRobotTerminal::getRobotId, robotId)
                        .eq(ResourceRobotTerminal::getTerminalId, terminal.getId()));
        if (binding == null) {
            binding = new ResourceRobotTerminal();
            binding.setId(UUID.randomUUID().toString().replace("-", ""));
            binding.setRobotId(robotId);
            binding.setTerminalId(terminal.getId());
            binding.setBindTime(eventTime);
            binding.setCreateTime(eventTime);
            binding.setActive(offline ? "0" : "1");
            robotTerminalMapper.insert(binding);
        } else {
            binding.setActive(offline ? "0" : "1");
            binding.setUnbindTime(offline ? eventTime : null);
            binding.setUpdateTime(eventTime);
            robotTerminalMapper.updateById(binding);
        }
        if (!offline) {
            robotTerminalMapper.deactivateOtherBindings(robotId, terminal.getId());
        }
    }

    private boolean hasEnabledAgv(NodeSnapshot node) {
        return node.getDeviceManager().getDevicesList().stream()
                .anyMatch(device -> device.getKind() == AGV_DEVICE_KIND && device.getEnabled());
    }

    private String resolveGrpcHost(NodeSnapshot node) {
        String advertised = StringUtils.trimToNull(node.getGrpcEndpoint().getHost());
        String observed = StringUtils.trimToNull(node.getObservedSourceIp());
        if ("advertised".equalsIgnoreCase(grpcHostSource)) {
            return advertised != null ? advertised : observed;
        }
        return observed != null ? observed : advertised;
    }
}