using System.Diagnostics.CodeAnalysis;
using System.Reactive.Concurrency;
using System.Reactive.Linq;
using System.Reactive.Threading.Tasks;
using System.Text.Json;
using Flurl.Util;
using InnovEnergy.Lib.Utils;
using InnovEnergy.Lib.Victron.VictronVRM;

using SQLite;
using Installation = InnovEnergy.App.Backend.DataTypes.Installation;


namespace InnovEnergy.App.Backend.Database;


public static partial class Db 
{
    public static Dictionary<Lib.Victron.VictronVRM.Installation, IReadOnlyList<Detail>> InstallationsAndDetails;
    internal const String DbPath = "./db.sqlite";

    
    private static SQLiteConnection Connection { get; } = new SQLiteConnection(DbPath);
    public static TableQuery<Installation>              Installations            => Connection.Table<Installation>();
    public static void Init()
    {
        // used to force static constructor
    }
    
    static Db()
    {
        // on startup create/migrate tables

        Connection.RunInTransaction(() =>
        {
            // Connection.CreateTable<Installation>();
        });

        InstallationsAndDetails = new Dictionary<Lib.Victron.VictronVRM.Installation, IReadOnlyList<Detail>>();
        
        Observable.Interval(TimeSpan.FromMinutes(5))
            .ObserveOn(TaskPoolScheduler.Default)
            .SubscribeOn(TaskPoolScheduler.Default)
            .StartWith(0) // Do it right away (on startup)
            .Select(UpdateInstallationsAndDetailsFromVrm)
            .Select(t => t.ToObservable())
            .Concat()
            .Subscribe(d => InstallationsAndDetails = d, exception => exception.WriteLine());
    }

    [UnconditionalSuppressMessage("Trimming", "IL2026:Members annotated with 'RequiresUnreferencedCodeAttribute' require dynamic access otherwise can break functionality when trimming application code", Justification = "<Pending>")]
    private static async Task<Dictionary<Lib.Victron.VictronVRM.Installation, IReadOnlyList<Detail>>> UpdateInstallationsAndDetailsFromVrm(Int64 _)
    {
        var content = await File.ReadAllTextAsync("./token.json");
        
        var acc = JsonSerializer.Deserialize<AccToken>(content)!;
        using var user = VrmAccount.Token(acc.idUser, acc.token);
        var installations = await user.GetInstallations();
        return installations
              .Do(i=>i.Name.WriteLine())
              .ToDictionary(i => i, i => i.GetDetails().Result);
    }
}

public class AccToken
{
    public UInt64 idUser;
    public String token;
}