using Microsoft.Extensions.Options;
using SurrealDb.Net;
using TarninaHub.Application.Abstractions;
using TarninaHub.Application.Dtos;
using TarninaHub.Infrastructure.Settings;

namespace TarninaHub.Infrastructure.Persistence;

public sealed class StorageService : IStorageService
{
    private const string ProbeTable = "storage_probe";

    private readonly ISurrealDbClient _client;
    private readonly SurrealDbSettings _settings;
    private readonly string _dataDirectory;

    public StorageService(ISurrealDbClient client, IOptions<SurrealDbSettings> settings)
    {
        _client = client;
        _settings = settings.Value;
        _dataDirectory = Path.Combine(AppContext.BaseDirectory, _settings.DataDirectory);
    }

    public async Task InitializeAsync(CancellationToken cancellationToken)
    {
        await _client.RawQuery(
            $"DEFINE TABLE IF NOT EXISTS {ProbeTable} SCHEMALESS;",
            cancellationToken: cancellationToken);
    }

    public StorageInfo GetInfo()
    {
        var isRemote = !string.IsNullOrWhiteSpace(_settings.RemoteUrl);

        return new StorageInfo(
            isRemote ? "remote" : "rocksdb",
            isRemote ? _settings.RemoteUrl! : _dataDirectory,
            _settings.Namespace,
            _settings.Database);
    }

    public async Task<int> GetProbeCountAsync(CancellationToken cancellationToken)
    {
        var probes = await _client.Select<StorageProbe>(ProbeTable, cancellationToken);

        return probes.Count();
    }

    public Task<StorageProbe> AddProbeAsync(CancellationToken cancellationToken)
    {
        var probe = new StorageProbe
        {
            CreatedAt = DateTimeOffset.UtcNow,
        };

        return _client.Create(ProbeTable, probe, cancellationToken);
    }
}