package com.ruoyi.device.bts;

import java.time.Instant;
import java.util.List;
import java.util.Map;
import java.util.Set;
import com.ruoyi.device.api.DeviceAdapter;
import com.ruoyi.device.model.AdapterCapabilities;
import com.ruoyi.device.model.ChannelIdentity;
import com.ruoyi.device.model.DetectedChannel;
import com.ruoyi.device.model.HistoryAvailability;
import com.ruoyi.device.model.HistoryPage;
import com.ruoyi.device.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;
    }

    @Override
    public String adapterCode()
    {
        return adapterCode;
    }

    @Override
    public AdapterCapabilities capabilities()
    {
        return capabilities;
    }

    @Override
    public List<DetectedChannel> discoverChannels()
    {
        return codec.parseDeviceInfo(transport.exchange(codec.getDeviceInfoRequest()));
    }

    @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());
    }

    @Override
    public List<HistoryAvailability> inquireHistory(Set<ChannelIdentity> channels)
    {
        if (!capabilities.historyDownload()) throw new UnsupportedOperationException("History download is not supported");
        if (channels == null || channels.isEmpty()) return List.of();
        return codec.parseHistoryAvailability(transport.exchange(codec.inquireHistoryRequest(channels)));
    }

    @Override
    public HistoryPage downloadHistory(ChannelIdentity channel, String btsTestId, long startPosition, int limit)
    {
        if (!capabilities.historyDownload()) throw new UnsupportedOperationException("History download is not supported");
        return codec.parseHistory(transport.exchange(codec.downloadRequest(channel, btsTestId, startPosition, limit)),
                channel, btsTestId, startPosition);
    }

    @Override
    public void close()
    {
        transport.close();
    }
}