namespace Explorer.Domain.Abstractions;

public interface IIndexStore
{
    Task OpenAsync(CancellationToken cancellationToken = default);
    Task CloseAsync();
    Task<string> QuickCheckAsync(CancellationToken cancellationToken = default);

    ISourceStore Sources { get; }
    IEntryStore Entries { get; }
    IExcludeStore Excludes { get; }
    IScanJobStore ScanJobs { get; }
    ITransferStore Transfers { get; }
    ISearchStore Search { get; }
    IAnalysisStore Analysis { get; }
    IHistoryStore History { get; }
    IHashStore Hashes { get; }
    IFileRelationStore Relations { get; }
    IRenameBatchStore RenameBatches { get; }
    ISyncProfileStore SyncProfiles { get; }
    IOperationProfileStore OperationProfiles { get; }

    bool CanWrite { get; }

    Task RunWriteAsync(Func<IIndexStore, Task> work, CancellationToken cancellationToken = default);
    Task<T> RunWriteAsync<T>(Func<IIndexStore, Task<T>> work, CancellationToken cancellationToken = default);
}

public interface ISourceStore
{
    Task<IReadOnlyList<Source>> GetAllAsync(CancellationToken cancellationToken = default);
    Task<Source?> GetAsync(long id, CancellationToken cancellationToken = default);
    Task<Source?> GetByStableKeyAsync(string key, CancellationToken cancellationToken = default);
    Task<long> UpsertAsync(Source source, CancellationToken cancellationToken = default);
    Task UpdateStatusAsync(long id, SourceStatus status, string? error, CancellationToken cancellationToken = default);
    Task UpdateUsnAsync(long id, long journalId, long nextUsn, CancellationToken cancellationToken = default);
    Task UpdateIndexedAsync(long id, DateTimeOffset utc, long generation, CancellationToken cancellationToken = default);
    Task SetLastSeenAsync(long id, string rootPath, DateTimeOffset utc, CancellationToken cancellationToken = default);
    Task DeleteAsync(long id, CancellationToken cancellationToken = default);
}

public interface IEntryStore
{
    Task<IndexEntry?> GetAsync(long id, CancellationToken cancellationToken = default);
    Task<IndexEntry?> GetRootAsync(long sourceId, CancellationToken cancellationToken = default);
    Task<IndexEntry?> GetByPathAsync(long sourceId, string pathRel, CancellationToken cancellationToken = default);
    Task<IndexEntry?> GetByParentNameAsync(long sourceId, long? parentId, string nameNorm, CancellationToken cancellationToken = default);
    Task<IndexEntry?> GetByFileIdAsync(long sourceId, long fileId, CancellationToken cancellationToken = default);
    Task<IReadOnlyList<IndexEntry>> GetChildrenAsync(long sourceId, long? parentId, EntryStatus? status = EntryStatus.Present, CancellationToken cancellationToken = default);
    Task UpsertBatchAsync(IReadOnlyList<IndexEntry> entries, CancellationToken cancellationToken = default);
    Task<long> UpsertAsync(IndexEntry entry, CancellationToken cancellationToken = default);
    Task UpdateAggregatesAsync(long id, long aggregateSize, int files, int dirs, CancellationToken cancellationToken = default);
    Task ApplySizeDeltaToAncestorsAsync(long? parentId, long sizeDelta, int fileDelta, int dirDelta, CancellationToken cancellationToken = default);
    Task MarkMissingAsDeletedAsync(long sourceId, long generation, DateTimeOffset utc, string? pathRelPrefix, CancellationToken cancellationToken = default);
    Task MarkSourceOfflineAsync(long sourceId, CancellationToken cancellationToken = default);
    Task MarkSourceOnlinePresentAsync(long sourceId, CancellationToken cancellationToken = default);
    Task TombstoneAsync(long id, DateTimeOffset utc, CancellationToken cancellationToken = default);
    Task TombstoneByPathPrefixAsync(long sourceId, string pathRelPrefix, DateTimeOffset utc, CancellationToken cancellationToken = default);
    Task DeleteExpiredTombstonesAsync(DateTimeOffset cutoffUtc, CancellationToken cancellationToken = default);
    Task RenameSubtreePathAsync(long sourceId, string oldPathRel, string newPathRel, CancellationToken cancellationToken = default);
    Task<long> CountPresentAsync(long sourceId, CancellationToken cancellationToken = default);
    Task RefreshCategoryFromChildrenAsync(long folderOrArchiveId, CancellationToken cancellationToken = default);
    Task SetUserCategoryAsync(long entryId, FileCategory category, string? reason = null, CancellationToken cancellationToken = default);
    Task<int> BackfillCheapCategoriesAsync(int take, CancellationToken cancellationToken = default);
    Task<IReadOnlyList<long>> GetArchiveIdsNeedingContentClassifyAsync(int take, CancellationToken cancellationToken = default);
    Task<IReadOnlyList<IndexEntry>> GetUnknownFilesForSignatureAsync(int take, CancellationToken cancellationToken = default);
}

public interface IExcludeStore
{
    Task<IReadOnlyList<ExcludeRule>> GetAllAsync(CancellationToken cancellationToken = default);
    Task<long> AddAsync(ExcludeRule rule, CancellationToken cancellationToken = default);
    Task RemoveAsync(long id, CancellationToken cancellationToken = default);
    Task EnsureDefaultsAsync(IReadOnlyList<ExcludeRule> defaults, CancellationToken cancellationToken = default);
}

public interface IScanJobStore
{
    Task<long> InsertAsync(ScanJob job, CancellationToken cancellationToken = default);
    Task UpdateAsync(ScanJob job, CancellationToken cancellationToken = default);
    Task InterruptRunningAsync(CancellationToken cancellationToken = default);
    Task<bool> HasActiveAsync(long sourceId, CancellationToken cancellationToken = default);
    Task AddErrorAsync(ScanError error, CancellationToken cancellationToken = default);
    Task<ScanJob?> GetAsync(long id, CancellationToken cancellationToken = default);
    Task<IReadOnlyList<ScanJob>> GetRecentAsync(int take, CancellationToken cancellationToken = default);
}

public interface ITransferStore
{
    Task<long> InsertAsync(TransferJob job, CancellationToken cancellationToken = default);
    Task UpdateAsync(TransferJob job, CancellationToken cancellationToken = default);
    Task<IReadOnlyList<TransferJob>> GetIncompleteAsync(CancellationToken cancellationToken = default);
    Task<IReadOnlyList<TransferJob>> GetHistoryAsync(int take, CancellationToken cancellationToken = default);
}

public interface ISearchStore
{
    Task<IReadOnlyList<IndexEntry>> SearchAsync(SearchRequest request, CancellationToken cancellationToken = default);
}

public sealed class SearchRequest
{
    public string? Name { get; init; }
    public string? Extension { get; init; }
    public bool? IsDirectory { get; init; }
    public long? MinSize { get; init; }
    public long? MaxSize { get; init; }
    public DateTimeOffset? CreatedAfter { get; init; }
    public DateTimeOffset? CreatedBefore { get; init; }
    public DateTimeOffset? ModifiedAfter { get; init; }
    public DateTimeOffset? ModifiedBefore { get; init; }
    public IReadOnlyList<long>? SourceIds { get; init; }
    public string? PathRelPrefix { get; init; }
    public bool DirectChildrenOnly { get; init; }
    public bool IncludeOffline { get; init; } = true;
    public bool IncludeDeleted { get; init; }
    public FileCategory? Category { get; init; }
    public int Skip { get; init; }
    public int Take { get; init; } = 500;
}

public interface IAnalysisStore
{
    Task EnsureReadyAsync(CancellationToken cancellationToken = default);
    Task<long> GetIndexStampAsync(CancellationToken cancellationToken = default);
    Task<IReadOnlyList<IndexEntry>> GetDirectoryRootsAsync(CancellationToken cancellationToken = default);
    Task<IReadOnlyList<IndexEntry>> LargestDirectoriesAsync(long? sourceId, long? parentId, int take, CancellationToken cancellationToken = default);
    Task<IReadOnlyList<IndexEntry>> LargestFilesAsync(long? sourceId, string? pathRelPrefix, int take, CancellationToken cancellationToken = default);
    Task<IReadOnlyList<ExtensionUsage>> UsageByExtensionAsync(long? sourceId, string? pathRelPrefix, int take, CancellationToken cancellationToken = default);
    Task<IReadOnlyList<CategoryUsage>> UsageByCategoryAsync(long? sourceId, string? pathRelPrefix, int take, CancellationToken cancellationToken = default);
    Task<IReadOnlyList<SourceUsage>> UsageBySourceAsync(CancellationToken cancellationToken = default);
    Task<IReadOnlyList<IndexEntry>> ChildrenBySizeAsync(long parentId, int take, CancellationToken cancellationToken = default);
}

public sealed class ExtensionUsage
{
    public required string Extension { get; init; }
    public long TotalSize { get; init; }
    public long FileCount { get; init; }
}

public sealed class CategoryUsage
{
    public required string Category { get; init; }
    public long TotalSize { get; init; }
    public long FileCount { get; init; }
}

public sealed class SourceUsage
{
    public long SourceId { get; init; }
    public required string DisplayName { get; init; }
    public long TotalSize { get; init; }
    public long FileCount { get; init; }
    public SourceStatus Status { get; init; }
}

public interface IHistoryStore
{
    Task CaptureSourceSnapshotAsync(long sourceId, DateTimeOffset utc, CancellationToken cancellationToken = default);
    Task CaptureDirectorySnapshotsAsync(long sourceId, DateTimeOffset utc, long minSize, int topN, CancellationToken cancellationToken = default);
    Task<IReadOnlyList<SourceSnapshot>> GetSourceHistoryAsync(long sourceId, CancellationToken cancellationToken = default);
}

public sealed class SourceSnapshot
{
    public DateTimeOffset CapturedUtc { get; init; }
    public long TotalSize { get; init; }
    public long FileCount { get; init; }
    public long DirCount { get; init; }
}

public interface IHashStore
{
    Task EnqueueSizeCollisionsAsync(long? sourceId, CancellationToken cancellationToken = default);
    Task<bool> HasPendingAsync(CancellationToken cancellationToken = default);
    Task<long> CountPendingAsync(CancellationToken cancellationToken = default);
    Task<IReadOnlyList<HashWorkItem>> DequeueAsync(int take, CancellationToken cancellationToken = default);
    Task CompletePartialAsync(long entryId, byte[] hash, CancellationToken cancellationToken = default);
    Task CompleteFullAsync(long entryId, byte[] hash, CancellationToken cancellationToken = default);
    Task MarkUniquePartialAsync(long entryId, CancellationToken cancellationToken = default);
    Task MarkErrorAsync(long entryId, CancellationToken cancellationToken = default);
    Task MarkSkippedAsync(long entryId, CancellationToken cancellationToken = default);
    Task<bool> HasPartialCollisionAsync(long entryId, long sizeBytes, CancellationToken cancellationToken = default);
    Task<IReadOnlyList<DuplicateGroup>> GetDuplicateGroupsAsync(long? sourceId, string? pathPrefix, int take, CancellationToken cancellationToken = default);
    Task<IReadOnlyList<byte[]>> GetDuplicateHashesAsync(long? sourceId, string? pathPrefix, int take, CancellationToken cancellationToken = default);
    Task<IReadOnlyList<DuplicateGroup>> GetDuplicateGroupsByHashesAsync(
        IReadOnlyList<byte[]> hashes,
        CancellationToken cancellationToken = default);
}

public interface IFileRelationStore
{
    Task<IReadOnlyList<FileRelation>> GetAmongAsync(IReadOnlyList<long> entryIds, CancellationToken cancellationToken = default);
    Task UpsertAsync(FileRelation relation, CancellationToken cancellationToken = default);
    Task DeleteAmongAsync(IReadOnlyList<long> entryIds, IReadOnlyList<FileRelationKind> kinds, CancellationToken cancellationToken = default);
}

public interface IRenameBatchStore
{
    Task<long> CreateAsync(IReadOnlyList<RenameBatchItem> items, CancellationToken cancellationToken = default);
    Task<RenameBatch?> GetLatestUndoableAsync(CancellationToken cancellationToken = default);
    Task MarkUndoneAsync(long id, CancellationToken cancellationToken = default);
}

public interface ISyncProfileStore
{
    Task<IReadOnlyList<SyncProfile>> ListAsync(CancellationToken cancellationToken = default);
    Task<SyncProfile?> GetAsync(long id, CancellationToken cancellationToken = default);
    Task<long> UpsertAsync(SyncProfile profile, CancellationToken cancellationToken = default);
    Task DeleteAsync(long id, CancellationToken cancellationToken = default);
}

public interface IOperationProfileStore
{
    Task<IReadOnlyList<OperationProfile>> ListAsync(CancellationToken cancellationToken = default);
    Task<OperationProfile?> GetAsync(long id, CancellationToken cancellationToken = default);
    Task<long> UpsertAsync(OperationProfile profile, CancellationToken cancellationToken = default);
    Task DeleteAsync(long id, CancellationToken cancellationToken = default);
}

public sealed class HashWorkItem
{
    public long EntryId { get; init; }
    public long SizeBytes { get; init; }
    public required string State { get; init; }
    public long SourceId { get; init; }
    public required string PathRel { get; init; }
    public string? RootPath { get; init; }
    public long? FileId { get; init; }
    public int Attributes { get; init; }
    public CloudAvailability? CloudAvailability { get; init; }
}

public sealed class DuplicateGroup
{
    public long SizeBytes { get; init; }
    public byte[]? Hash { get; init; }
    public IReadOnlyList<IndexEntry> Entries { get; init; } = [];
    public bool SameFileId { get; init; }
}