using System.Diagnostics.CodeAnalysis;
using InnovEnergy.Lib.Devices.Battery48TL.DataTypes;
using InnovEnergy.Lib.Units;
using InnovEnergy.Lib.Units.Power;
using static InnovEnergy.Lib.Devices.Battery48TL.DataTypes.LedState;

namespace InnovEnergy.Lib.Devices.Battery48TL;

using Strings = IReadOnlyList<String>;

[SuppressMessage("ReSharper", "InconsistentNaming")]
[SuppressMessage("ReSharper", "ConvertToAutoProperty")]
public partial class Battery48TlRecord
{
    public Dc_           Dc           => new Dc_(this);
    public Leds_         Leds         => new Leds_(this);
    public Temperatures_ Temperatures => new Temperatures_(this);

    public Boolean ConnectedToDcBus => (_IoStates &  1) == 0;
    public Boolean Eoc              => Leds is { Green: On, Amber: Off, Blue : Off };

    public Strings Warnings => ParseWarnings().OrderBy(w => w).ToList();
    public Strings Alarms   => ParseAlarms()  .OrderBy(w => w).ToList();

    public Percent Soc => _Soc;

    public Current BusCurrent => _BusCurrent;
    
    public Current HeatingCurrent => _BusCurrent - _CellsCurrent;
    
    public readonly struct Leds_
    {
        public LedState Blue  => Self.ParseLed(LedColor.Blue);
        public LedState Red   => Self.ParseLed(LedColor.Red);
        public LedState Green => Self.ParseLed(LedColor.Green);
        public LedState Amber => Self.ParseLed(LedColor.Amber);

        private Battery48TlRecord Self { get; }
        internal Leds_(Battery48TlRecord self) => this.Self = self;
    }

    public readonly struct Temperatures_
    {
        public Boolean     Heating => (Self._IoStates & 64) != 0;
        public Temperature Board   => Self._TemperaturesBoard;
        public Cells_      Cells   => new Cells_(Self);
        
        public TemperatureState State => Self.Leds switch
        {
            { Green: >= Blinking, Blue: >= Blinking } => TemperatureState.Cold,
            _                                         => TemperatureState.Operation,
            // TODO: overheated
        };

        internal Temperatures_(Battery48TlRecord self) => Self = self;
        private Battery48TlRecord Self { get; }
    }

    public readonly struct Cells_
    {
        public Temperature Center  => Self._TemperaturesCellsCenter;
        public Temperature Left    => Self._TemperaturesCellsLeft;
        public Temperature Right   => Self._TemperaturesCellsRight;
        public Temperature Average => Self._TemperaturesCellsAverage;
        
        internal Cells_(Battery48TlRecord self) => Self = self;
        private Battery48TlRecord Self { get; }
    }

    public readonly struct Dc_
    {
        public Voltage     Voltage => Self._CellsVoltage;
        public Current     Current => Self._CellsCurrent;
        public ActivePower Power   => Self._CellsVoltage * Self._CellsCurrent;
        
        internal Dc_(Battery48TlRecord self) => Self = self;
        private Battery48TlRecord Self { get; }
    }
    
    [SuppressMessage("ReSharper", "StringLiteralTypo")]
    private IEnumerable<String> ParseAlarms()
    {
        Boolean HasBit(Int16 bit) => (_AlarmFlags & 1uL << bit) > 0;

        if (HasBit(0) ) yield return "Tam  : BMS temperature too low";
        if (HasBit(2) ) yield return "TaM2 : BMS temperature too high";
        if (HasBit(3) ) yield return "Tbm  : Battery temperature too low";
        if (HasBit(5) ) yield return "TbM2 : Battery temperature too high";
        if (HasBit(7) ) yield return "VBm2 : Bus voltage too low";
        if (HasBit(9) ) yield return "VBM2 : Bus voltage too high";
        if (HasBit(11)) yield return "IDM2 : Discharge current too high";
        if (HasBit(12)) yield return "ISOB : Electrical insulation failure";
        if (HasBit(13)) yield return "MSWE : Main switch failure";
        if (HasBit(14)) yield return "FUSE : Main fuse blown";
        if (HasBit(15)) yield return "HTRE : Battery failed to warm up";
        if (HasBit(16)) yield return "TCPE : Temperature sensor failure";
        if (HasBit(17)) yield return "STRE :";
        if (HasBit(18)) yield return "CME  : Current sensor failure";
        if (HasBit(19)) yield return "HWFL : BMS hardware failure";
        if (HasBit(20)) yield return "HWEM : Hardware protection tripped";
        if (HasBit(21)) yield return "ThM  : Heatsink temperature too high";
        if (HasBit(22)) yield return "vsm1 : String voltage too low";
        if (HasBit(23)) yield return "vsm2 : Low string voltage failure";
        if (HasBit(25)) yield return "vsM2 : String voltage too high";
        if (HasBit(27)) yield return "iCM2 : Charge current too high";
        if (HasBit(29)) yield return "iDM2 : Discharge current too high";
        if (HasBit(31)) yield return "MID2 : String voltage unbalance too high";
        if (HasBit(33)) yield return "CCBF : Internal charger hardware failure";
        if (HasBit(34)) yield return "AhFL :";
        if (HasBit(36)) yield return "TbCM :";
        if (HasBit(37)) yield return "BRNF :";
        if (HasBit(42)) yield return "HTFS : Heater Fuse Blown";
        if (HasBit(43)) yield return "DATA : Parameters out of range";
        if (HasBit(45)) yield return "CELL2:";
    }

    [SuppressMessage("ReSharper", "StringLiteralTypo")]
    private IEnumerable<String> ParseWarnings()
    {
        Boolean HasBit(Int16 bit) => (_WarningFlags & 1uL << bit) > 0;
        
        if (HasBit(1) ) yield return "TaM1: BMS temperature high";
        if (HasBit(4) ) yield return "TbM1: Battery temperature high";
        if (HasBit(6) ) yield return "VBm1: Bus voltage low";
        if (HasBit(8) ) yield return "VBM1: Bus voltage high";
        if (HasBit(10)) yield return "IDM1: Discharge current high";
        if (HasBit(24)) yield return "vsM1: String voltage high";
        if (HasBit(26)) yield return "iCM1: Charge current high";
        if (HasBit(28)) yield return "iDM1: Discharge current high";
        if (HasBit(30)) yield return "MID1: String voltages unbalanced";
        if (HasBit(32)) yield return "BLPW: Not enough charging power on bus";
        if (HasBit(35)) yield return "Ah_W: String SOC low";
        if (HasBit(38)) yield return "MPMM: Midpoint wiring problem";
        if (HasBit(39)) yield return "TCMM:";
        if (HasBit(40)) yield return "TCdi: Temperature difference between strings high";
        if (HasBit(41)) yield return "WMTO:";
        if (HasBit(44)) yield return "bit44:";
        if (HasBit(46)) yield return "CELL1:";
    }


    private Double CalcPowerLimitImposedByVoltageLimit(Double vLimit, Double rInt)
    {
        var v = Dc.Voltage; 
        var i = Dc.Current;
        
        var dv = vLimit - v;
        var di = dv / rInt;

        return vLimit * (i + di);
    }

    private Double CalcPowerLimitImposedByCurrentLimit(Double iLimit, Double rInt)
    {
        var v = Dc.Voltage; 
        var i = Dc.Current;
        
        var di = iLimit - i;
        var dv = di * rInt;

        return iLimit * (v + dv);
    }

    public DcPower MaxChargePower
    {
        get
        {
            var pLimits = new[]
            {
                CalcPowerLimitImposedByVoltageLimit(Constants.VMax, Constants.RIntMin),
                CalcPowerLimitImposedByVoltageLimit(Constants.VMax, Constants.RIntMax),
                CalcPowerLimitImposedByCurrentLimit(Constants.IMax, Constants.RIntMin),
                CalcPowerLimitImposedByCurrentLimit(Constants.IMax, Constants.RIntMax)
            };

            var pLimit = pLimits.Min();

            return Math.Max(pLimit, 0);
        }
    }

    public DcPower MaxDischargePower
    {
        get
        {
            var pLimits = new[]
            {
                CalcPowerLimitImposedByVoltageLimit(Constants.VMin, Constants.RIntMin),
                CalcPowerLimitImposedByVoltageLimit(Constants.VMin, Constants.RIntMax),
                CalcPowerLimitImposedByCurrentLimit(-Constants.IMax, Constants.RIntMin),
                CalcPowerLimitImposedByCurrentLimit(-Constants.IMax, Constants.RIntMax),
            };

            var pLimit = pLimits.Max();

            return Math.Min(pLimit, 0);
        }
    }
}