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using CoCoL;
using Duplicati.Library.Interface;

namespace Duplicati.Library.Main.Operation.Backup
{
    /// <summary>
    /// Static typed definitions of channels used for the backup process
    /// </summary>
    internal class Channels
    {
        /// <summary>
        /// When the backup completes, all in-progress archives are sent from the <see cref="DataBlockProcessor"/> to the <see cref="SpillCollectorProcess"/>
        /// </summary>
        public readonly IChannel<SpillVolumeRequest> SpillPickup = ChannelManager.CreateChannel<SpillVolumeRequest>();
        /// <summary>
        /// All data blocks are sent during the scanning to the <see cref="DataBlockProcessor"/> who bundles them in compressed archives
        /// </summary>
        public readonly IChannel<DataBlock> OutputBlocks = ChannelManager.CreateChannel<DataBlock>();
        /// <summary>
        /// If a file has changes in the metadata, it is sent to the <see cref="FileBlockProcessor"/> where it is read
        /// </summary>
        public readonly IChannel<MetadataPreProcess.FileEntry> AcceptedChangedFile = ChannelManager.CreateChannel<MetadataPreProcess.FileEntry>();
        /// <summary>
        /// If a file has changes in the metadata, it is sent to the <see cref="FileBlockProcessor"/> where it is read
        /// </summary>
        public readonly IChannel<StreamBlock> StreamBlock = ChannelManager.CreateChannel<StreamBlock>();
        /// <summary>
        /// After metadata has been processed and collected, the <see cref="MetadataPreProcess"/> sends the file data to the <see cref="FilePreFilterProcess"/>
        /// </summary>
        public readonly IChannel<MetadataPreProcess.FileEntry> ProcessedFiles = ChannelManager.CreateChannel<MetadataPreProcess.FileEntry>();
        /// <summary>
        /// When enumerating the source folders, all discovered paths are sent by the <see cref="FileEnumerationProcess"/> to the <see cref="MetadataPreProcess"/>
        /// </summary>
        public readonly IChannel<ISourceProviderEntry> SourcePaths = ChannelManager.CreateChannel<ISourceProviderEntry>();
        /// <summary>
        /// All progress events are communicated over this channel, to ensure that parallel progress is reported as a if it was sequential
        /// </summary>
        public readonly IChannel<Common.ProgressEvent> ProgressEvents = ChannelManager.CreateChannel<Common.ProgressEvent>();
    }
}