using System.Diagnostics.CodeAnalysis;
using System.Text;
using InnovEnergy.Lib.Devices.Battery250Up.DataTypes;
using InnovEnergy.Lib.Units;
using InnovEnergy.Lib.Units.Power;
using static InnovEnergy.Lib.Devices.Battery250Up.DataTypes.LedState;

namespace InnovEnergy.Lib.Devices.Battery250Up;

using Strings = IReadOnlyList<String>;

[SuppressMessage("ReSharper", "InconsistentNaming")]
[SuppressMessage("ReSharper", "ConvertToAutoProperty")]
public partial class Battery250UpRecord
{
    public  Dc_             Dc               => new Dc_(this);
    public  Leds_           Leds             => new Leds_(this);
    public  Temperatures_   Temperatures     => new Temperatures_(this);
    public  AuxBitInformation_       AuxBitInformation         => new AuxBitInformation_(this);

    public Boolean Eoc              => ParseEocReached();//Leds is { Green: On, Amber: Off, Blue : Off }; //  ParseEocReached(); // 
    
    public UInt16  IoStates         => _IoStates;

    public String  BatteryState     => ParseBatteryState();
    
    public String  SerialNumber     => $"{_SerialNum1:X4}{_SerialNum2:X4}{_SerialNum3:X4}{_SerialNum4:X4}".TrimEnd('0');
    
    public String  FwVersion        => _FwVersion.ToString("X4"); 
   
    public Strings Warnings         => ParseWarnings().OrderBy(w => w).ToList();
    public Strings Alarms           => ParseAlarms()  .OrderBy(w => w).ToList();

    public Percent Soc              => _Soc;
    public Double  SOCAh            => _SOCAh;
    
    public Current BusCurrent       => _BusCurrent;
    
    public Current CellsCurrent    => _CellsCurrent;
    
    public Current HeatingCurrent   => _BusCurrent - _CellsCurrent;
    public DcPower HeatingPower     => HeatingCurrent * Dc.Voltage;
    
    // Time since TOC is a counter from the last moment when the battery reached EOC
    // When The battery is full charged (reached EOC) the Time Since TOC is set to 0
    public TimeSpan TimeSinceTOC   => TimeSpan.FromMinutes(_TimeSinceToc);

    public Boolean CalibrationChargeRequested => TimeSinceTOC > TimeSpan.FromDays(7); // From AF0A (Fw Version) Each 14 days , But Max and Peter asked for 7 days.
    
    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 Battery250UpRecord Self { get; }
        internal Leds_(Battery250UpRecord self) => this.Self = self;
        
    }
 
    
    public readonly struct AuxBitInformation_
    {
        public Boolean DischargeEnabled       => ((Self._IoStates >> 0) & 1)  == 1; 
        public Boolean ChargeEnabled          => ((Self._IoStates >> 1) & 1)  == 1; 
        public Boolean WarmUpActive           => ((Self._IoStates >> 2) & 1)  == 1; 
        public Boolean TOCRequested           => ((Self._IoStates >> 3) & 1)  == 1; 
        public Boolean EOCReached             => ((Self._IoStates >> 4) & 1) == 1;  
    
        internal AuxBitInformation_(Battery250UpRecord self) => Self = self;
        private Battery250UpRecord Self { get; }
    }
    
    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_(Battery250UpRecord self) => Self = self;
        private Battery250UpRecord 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_(Battery250UpRecord self) => Self = self;
        private Battery250UpRecord 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_(Battery250UpRecord self) => Self = self;
        private Battery250UpRecord Self { get; }
    }
    

    private String ParseBatteryState()
    {
        var s1 = Encoding.ASCII.GetString(BitConverter.GetBytes(_BatteryState1).Reverse().ToArray()); // endian swap
        var s2 = Encoding.ASCII.GetString(BitConverter.GetBytes(_BatteryState2).Reverse().ToArray()); // endian swap

        return s1 + s2;
    }
    
    private Boolean ParseEocReached()
    {
        return "EOC_" == ParseBatteryState();
    }
    
    [SuppressMessage("ReSharper", "StringLiteralTypo")]
    private IEnumerable<String> ParseAlarms()
    {
        Boolean HasBit(Int16 bit) => (_AlarmFlags & 1uL << bit) > 0;

        if (HasBit(0)) yield return "Tam   : Ambient Temperature too low";
        if (HasBit(2)) yield return "TaM2  : Ambient 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 : Voltage measurement circuit fails";
        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(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(42)) yield return "HTFS : Heater Fuse Blown";
        if (HasBit(43)) yield return "DATA : Parameters out of range";
        if (HasBit(45)) yield return "LMPA : Unbalance string voltages";
        if (HasBit(46)) yield return "HEBT : Loss of heartbeat";
        if (HasBit(48)) yield return "CURM : Battery charge requested after EDCH";
    }

    [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(22)) yield return "vsm1: String voltage too low";
        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(33)) yield return "CCBF : Internal charger hardware failure";
        if (HasBit(35)) yield return "Ah_W: String SOC low";
        if (HasBit(38)) yield return "MPMM: Midpoint wiring problem";
        if (HasBit(40)) yield return "TCdi: Temperature difference between strings high";
        if (HasBit(44)) yield return "LMPW : String voltages unbalance warning";
        if (HasBit(47)) yield return "TOCW : Top of Charge requested";
        if (HasBit(49)) yield return "BUSL : Bus lower than string";
    }


    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);
        }
    }
}