using System.Collections.Immutable;
using InnovEnergy.Lib.Utils;
using InnovEnergy.Lib.Victron.VeDBus;
using InnovEnergy.WireFormat.VictronV1;
using static InnovEnergy.VenusLogger.Parsers.Utils;

namespace InnovEnergy.VenusLogger.Parsers;

using Props = ImmutableDictionary<String, VeProperty>;

public static class Inverter
{
    private static Maybe<Device> NoDevice => Maybe<Device>.Nothing;


    public static Maybe<Device> GetInverter(this IEnumerable<ServiceProperties> services)
    {
        return services
              .Where(VeService.IsInverterService)
              .Select(MakeDevice)
              .SingleOrDefault()
              .Maybe();
    }

    public static (Maybe<Device> AcInBus, Maybe<Device> AcOutBus, Maybe<Device> DcBus) GetInverterBusses(this IEnumerable<ServiceProperties> services)
    {
        return services
              .Where(VeService.IsInverterService)
              .Select(s => (s.GetAcIn(), s.GetAcOut(), s.GetDc()))
              .SingleOrDefault((NoDevice, NoDevice, NoDevice));
    }

    private static Device MakeDevice(ServiceProperties s)
    {
        var acIn  = s.GetAcIn();
        var acOut = s.GetAcOut();
        var dc    = s.GetDc();

        return new Device
        {
            Type = DeviceType.Inverter,
            Devices = { acIn.Concat(acOut).Concat(dc) }
        };
    }

    private static Maybe<Device> GetAcIn(this ServiceProperties serviceProperties)
    {
        var props = serviceProperties.Properties;
        var phases = AcPhases
                    .TrySelect(props.GetAcInPhase)
                    .ToList();

        if (!phases.Any())
            return null;

        return new Device
        {
            Type = DeviceType.AcInBus,
            Phases = { phases },
        };
    }

    private static Maybe<Device> GetAcOut(this ServiceProperties serviceProperties)
    {
        var props = serviceProperties.Properties;

        var phases = AcPhases
                    .TrySelect(props.GetAcOutPhase)
                    .ToList();

        if (!phases.Any())
            return null;

        return new Device
        {
            Type = DeviceType.AcOutBus,
            Phases = { phases },
        };
    }

    private static Maybe<Device> GetDc(this ServiceProperties serviceProperties)
    {
        return new Device
        {
            Type = DeviceType.DcBus,
            Phases = { serviceProperties.Properties.GetDcPhase() },
        };
    }

    private static void GetLosses(this ServiceProperties serviceProperties)
    {
        var dcPhase = serviceProperties.Properties.GetDcPhase();
        var dcPower = serviceProperties.Properties.GetProperty<Single>("/Dc/0/Power");

        var losses = dcPower - dcPhase.Power;
        Console.WriteLine("Dc Losses " + losses);


        // return new Device
        // {
        //     Type = DeviceType.DcBus,
        //     Phases = { dcPhase },
        // };
    }


    // var dcPower = services
    //                  .Where(VeService.IsInverterService)
    //                  .Select(p => p.Properties.GetProperty<Single>("/Dc/0/Power"))
    //                  .FirstOrDefault();

    private static Phase GetAcInPhase(this Props props, Int32 phase)
    {
        return new Phase
        {
            Voltage =  props.GetProperty<Single>($"/Ac/ActiveIn/L{phase}/V"),
            Current = -props.GetProperty<Single>($"/Ac/ActiveIn/L{phase}/I"), // - !!
            Power   = -props.GetProperty<Single>($"/Ac/ActiveIn/L{phase}/P"), // - !!
        };
    }

    private static Phase GetAcOutPhase(this Props props, Int32 phase)
    {
        return new Phase
        {
            Voltage = props.GetProperty<Single>($"/Ac/Out/L{phase}/V"),
            Current = props.GetProperty<Single>($"/Ac/Out/L{phase}/I"),
            Power   = props.GetProperty<Single>($"/Ac/Out/L{phase}/P"),
        };
    }
}