package com.ruoyi.config;

import java.time.Duration;
import java.time.Instant;
import java.util.List;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;
import org.springframework.beans.factory.annotation.Autowired;
import com.ruoyi.device.bts.BtsDevelopmentSimulator;
import com.ruoyi.device.discovery.DeviceDiscoveryCandidateStore;
import com.ruoyi.device.discovery.DeviceDiscoveryCandidateStore.CollectorCandidate;
import com.ruoyi.system.mapper.TCollectorMapper;
import com.ruoyi.system.service.ICollectorDisconnectRecoveryService;

/** 将模拟采集器的发现写入 Redis，并同步已登记采集器的实时在线事实。 */
@Component
public class DevelopmentCollectorStatusSynchronizer
{
    private final BtsDevelopmentSimulator simulator;
    private final DeviceDiscoveryCandidateStore candidateStore;
    private final TCollectorMapper collectorMapper;
    private final ICollectorDisconnectRecoveryService disconnectRecovery;

    @Autowired
    public DevelopmentCollectorStatusSynchronizer(BtsDevelopmentSimulator simulator,
            DeviceDiscoveryCandidateStore candidateStore, TCollectorMapper collectorMapper,
            ICollectorDisconnectRecoveryService disconnectRecovery)
    {
        this.simulator = simulator;
        this.candidateStore = candidateStore;
        this.collectorMapper = collectorMapper;
        this.disconnectRecovery = disconnectRecovery;
    }

    /** 保留单元测试及独立模拟器装配使用的旧构造入口。 */
    public DevelopmentCollectorStatusSynchronizer(BtsDevelopmentSimulator simulator,
            DeviceDiscoveryCandidateStore candidateStore, TCollectorMapper collectorMapper)
    {
        this(simulator, candidateStore, collectorMapper, (codes, at) -> { });
    }

    /** 完整替换 dev-sim 采集器快照，删除配置后候选立即消失。 */
    @Scheduled(fixedDelay = BtsDevelopmentSimulator.POLL_INTERVAL_MS)
    public synchronized void synchronizeOnlineStatus()
    {
        Instant observedAt = Instant.now();
        var simulatorState = simulator.snapshot();
        List<CollectorCandidate> candidates = simulatorState.collectors().stream()
                .map(item -> new CollectorCandidate(BtsDevelopmentSimulator.ADAPTER_CODE, item.deviceCode(),
                        item.ip(), item.mac(), item.name(),
                        item.manufacturer(), item.model(), item.channelCount(), item.online(), observedAt,
                        observedAt.plus(Duration.ofSeconds(30))))
                .toList();
        candidateStore.replaceCollectors(BtsDevelopmentSimulator.ADAPTER_CODE, candidates);
        candidates.forEach(candidate -> collectorMapper.updateRegisteredObservation(candidate.deviceCode(),
                candidate.online() ? "ONLINE" : "OFFLINE"));
        disconnectRecovery.reconcile(simulatorState.collectors().stream()
                .filter(item -> item.online()).map(item -> item.deviceCode()).collect(java.util.stream.Collectors.toSet()), observedAt);
    }
}