package com.battery.device.bts;

import java.time.Instant;
import java.util.List;
import java.util.Map;
import java.util.Set;
import com.battery.device.api.DeviceAdapter;
import com.battery.device.api.model.AdapterCapabilities;
import com.battery.device.api.model.ChannelIdentity;
import com.battery.device.api.model.DetectedChannel;
import com.battery.device.api.model.RealtimeSnapshot;

public final class BtsDeviceAdapter implements DeviceAdapter
{
    private final String adapterCode;
    private final BtsTransport transport;
    private final BtsXmlCodec codec;
    private final AdapterCapabilities capabilities;

    public BtsDeviceAdapter(String adapterCode, BtsTransport transport, BtsXmlCodec codec)
    {
        this(adapterCode, transport, codec, AdapterCapabilities.observeOnly());
    }

    public BtsDeviceAdapter(String adapterCode, BtsTransport transport, BtsXmlCodec codec,
            AdapterCapabilities capabilities)
    {
        this.adapterCode = adapterCode;
        this.transport = transport;
        this.codec = codec;
        this.capabilities = capabilities;
    }

    /** 返回本实例登记的适配器编码。 */
    @Override
    public String adapterCode()
    {
        return adapterCode;
    }

    /** 返回本实例登记的能力标记；BTS 协议路线按只观测装配。 */
    @Override
    public AdapterCapabilities capabilities()
    {
        return capabilities;
    }

    /** 通过设备信息命令读取通道登记事实，作为发现候选返回。 */
    @Override
    public List<DetectedChannel> discoverChannels()
    {
        return codec.parseDeviceInfo(transport.exchange(codec.getDeviceInfoRequest()));
    }

    /** 按给定通道集合请求一次实时状态；通道为空时不发请求。 */
    @Override
    public Map<ChannelIdentity, RealtimeSnapshot> inquire(Set<ChannelIdentity> channels)
    {
        if (channels == null || channels.isEmpty()) return Map.of();
        return codec.parseSnapshots(transport.exchange(codec.inquireRequest(channels, false)), Instant.now());
    }



    /** 关闭底层传输连接。 */
    @Override
    public void close()
    {
        transport.close();
    }
}