using InnovEnergy.Lib.Devices.Kaco92L3.DataType;

namespace InnovEnergy.Lib.Devices.Kaco92L3;

public partial class  KacoRecord
{
    
    private static float ScaleSunspec(Int16 value, Int16 sf)
    {
        // -32768 is SunSpec "not implemented"
        if (value == -32768)
            return float.NaN;

        if (sf == 0)
            return value;

        return (float)(value * Math.Pow(10, sf));
    }

    private static float ScaleSunspec(UInt16 value, Int16 sf)
    {
        // interpret unsigned as signed when applying SF; range is the same
        return ScaleSunspec(unchecked((Int16)value), sf);
    }

    private static Int16 UnscaleSunspecToInt16(float value, Int16 sf)
    {
        if (float.IsNaN(value) || float.IsInfinity(value))
            return -32768; // "not implemented" / invalid

        if (sf == 0)
            return (Int16)Math.Round(value);

        var raw = value / (float)Math.Pow(10, sf);
        return (Int16)Math.Round(raw);
    }

    private static UInt16 UnscaleSunspecToUInt16(float value, Int16 sf)
    {
        var raw = UnscaleSunspecToInt16(value, sf);
        return unchecked((UInt16)raw);
    }

    /******************************  High-level API for Model 64201  ****************************/

    // ───────────────────────────────────────────────
    // States & control
    // ───────────────────────────────────────────────

    // Header
    public UInt16 BattCharId     =>    _battCharId;         // ID = 64202
    public UInt16 BattCharLength =>    _battCharLength;     // L = 6 + (RBCount * 8)
    
    public ReuqestedState RequestedState
    {
        get => (ReuqestedState)_requestedState;
        set => _requestedState = (UInt16)value;
    }

    public CurrentState CurrentState => (CurrentState)_currentState;

    public ControlMode ControlMode
    {
        get => (ControlMode)_controlMode;
        set => _controlMode = (UInt16)value;
    }

    public bool IsGridConnected => CurrentState == CurrentState.GridConnected;
    public bool IsStandby       => CurrentState == CurrentState.Standby;
    public bool IsOff           => CurrentState == CurrentState.Off;

    // Watchdog seconds (no scale factor)
    public UInt16 WatchdogSeconds
    {
        get => _watchdog;
        set => _watchdog = value;
    }
    

    // ───────────────────────────────────────────────
    // Setpoints (scaled)
    // ───────────────────────────────────────────────

    /// <summary>Active power setpoint in percent of WMax [%].</summary>
    public float ActivePowerSetPercent
    {
        get => ScaleSunspec(_wSetPct, _wSetPctSf);
        set => _wSetPct = UnscaleSunspecToInt16(value, _wSetPctSf);
    }

    /// <summary>Reactive power setpoint in percent of SMax [%].</summary>
    public float ReactivePowerSetPercent
    {
        get => ScaleSunspec(_varWMaxSetPct, _varSetPctSf);
        set => _varWMaxSetPct = UnscaleSunspecToInt16(value, _varSetPctSf);
    }

    // ───────────────────────────────────────────────
    // Ramp parameters (scaled)
    // ───────────────────────────────────────────────

    /// <summary>Active power PT1 ramp time [s].</summary>
    public float ActivePowerRampTimeSeconds
    {
        get => ScaleSunspec(_wParamRmpTms, _rmpTmsSf);
        set => _wParamRmpTms = UnscaleSunspecToUInt16(value, _rmpTmsSf);
    }

    /// <summary>Active power ramp-down rate [% ref / min].</summary>
    public float ActivePowerRampDownPercentPerMin
    {
        get => ScaleSunspec(_wParamRmpDecTmn, _rmpIncDecSf);
        set => _wParamRmpDecTmn = UnscaleSunspecToUInt16(value, _rmpIncDecSf);
    }

    /// <summary>Active power ramp-up rate [% ref / min].</summary>
    public float ActivePowerRampUpPercentPerMin
    {
        get => ScaleSunspec(_wParamRmpIncTmn, _rmpIncDecSf);
        set => _wParamRmpIncTmn = UnscaleSunspecToUInt16(value, _rmpIncDecSf);
    }

    /// <summary>Reactive power PT1 ramp time [s].</summary>
    public float ReactivePowerRampTimeSeconds
    {
        get => ScaleSunspec(_varParamRmpTms, _rmpTmsSf);
        set => _varParamRmpTms = UnscaleSunspecToUInt16(value, _rmpTmsSf);
    }

    /// <summary>Reactive power ramp-down rate [% ref / min].</summary>
    public float ReactivePowerRampDownPercentPerMin
    {
        get => ScaleSunspec(_varParamRmpDecTmn, _rmpIncDecSf);
        set => _varParamRmpDecTmn = UnscaleSunspecToUInt16(value, _rmpIncDecSf);
    }

    /// <summary>Reactive power ramp-up rate [% ref / min].</summary>
    public float ReactivePowerRampUpPercentPerMin
    {
        get => ScaleSunspec(_varParamRmpIncTmn, _rmpIncDecSf);
        set => _varParamRmpIncTmn = UnscaleSunspecToUInt16(value, _rmpIncDecSf);
    }

    // Ramp enable flags
    public EnableDisableEnum ActivePowerRampEnable
    {
        get => (EnableDisableEnum)_wParamEna;
        set => _wParamEna = (UInt16)value;
    }

    public EnableDisableEnum ReactivePowerRampEnable
    {
        get => (EnableDisableEnum)_varParamEna;
        set => _varParamEna = (UInt16)value;
    }

    // ───────────────────────────────────────────────
    // Status / error (read-only enum views)
    // ───────────────────────────────────────────────

    //public VendorStateEnum VendorState   => (VendorStateEnum)_stVnd;
    //public PuStateEnum     PuState       => (PuStateEnum)_stPu;
    public StatePcu    PcuState      => (StatePcu)_stPcu;
    public ErrorPcu    PcuError      => (ErrorPcu)_errPcu;
    
    public UInt16 BatteryCharVersion      => _battCharVersion;
    public UInt16 BatteryCharMinorVersion => _battCharVerMinor;

    /// <summary>
    /// Scale factor for battery voltages (V_SF).
    /// </summary>
    public Int16 BatteryVoltageScaleFactor => _battCharVSf;

    /// <summary>
    /// Scale factor for battery currents (A_SF).
    /// </summary>
    public Int16 BatteryCurrentScaleFactor => _battCharASf;

    
    public Int16  ActivePowerW     => _activePowerW;             
    public Int16  ReactivePowerVar => _reactivePowerVar;         
    public Int16  LineFrequencyHz  => _lineFrequencyHz;     
    
    // Helper wrappers for scaled values
    private float ScaleBattVoltage(UInt16 raw) => ScaleSunspec(raw, _battCharVSf);
    private float ScaleBattCurrent(UInt16 raw) => ScaleSunspec(raw, _battCharASf);
    private UInt16 UnscaleBattVoltage(float value) => UnscaleSunspecToUInt16(value, _battCharVSf);
    private UInt16 UnscaleBattCurrent(float value) => UnscaleSunspecToUInt16(value, _battCharASf);

    // ───────────────────────────────────────────────
    // Battery discharge limits (scaled, RW)
    // ───────────────────────────────────────────────

    /// <summary>Minimum discharge voltage [V].</summary>
    public float MinDischargeVoltage
    {
        get => ScaleBattVoltage(_disMinVRaw);
        set => _disMinVRaw = UnscaleBattVoltage(value);
    }

    /// <summary>Maximum discharge current [A].</summary>
    public float MaxDischargeCurrent
    {
        get => ScaleBattCurrent(_disMaxARaw);
        set => _disMaxARaw = UnscaleBattCurrent(value);
    }

    /// <summary>Discharge cutoff current [A]. If discharge current falls below this, it disconnects (optional according to sheet).</summary>
    public float DischargeCutoffCurrent
    {
        get => ScaleBattCurrent(_disCutoffARaw);
        set => _disCutoffARaw = UnscaleBattCurrent(value);
    }

    // ───────────────────────────────────────────────
    // Battery charge limits (scaled, RW)
    // ───────────────────────────────────────────────

    /// <summary>Maximum charge voltage [V].</summary>
    public float MaxChargeVoltage
    {
        get => ScaleBattVoltage(_chaMaxVRaw);
        set => _chaMaxVRaw = UnscaleBattVoltage(value);
    }

    /// <summary>Maximum charge current [A].</summary>
    public float MaxChargeCurrent
    {
        get => ScaleBattCurrent(_chaMaxARaw);
        set => _chaMaxARaw = UnscaleBattCurrent(value);
    }

    /// <summary>Charge cutoff current [A]. If charge current falls below this, it disconnects.</summary>
    public float ChargeCutoffCurrent
    {
        get => ScaleBattCurrent(_chaCutoffARaw);
        set => _chaCutoffARaw = UnscaleBattCurrent(value);
    }

    // ───────────────────────────────────────────────
    // Limit enable flag
    // ───────────────────────────────────────────────

    /// <summary>
    /// When EnLimit = 1, new battery limits are activated.
    /// </summary>
    public EnableDisableEnum BatteryLimitsEnable
    {
        get => (EnableDisableEnum)_enLimitRaw;
        set => _enLimitRaw = (UInt16)value;
    }

    /// <summary>Convenience bool wrapper for EnLimit.</summary>
    public bool BatteryLimitsEnabled
    {
        get => BatteryLimitsEnable == EnableDisableEnum.Enabled;
        set => BatteryLimitsEnable = value ? EnableDisableEnum.Enabled : EnableDisableEnum.Disabled;
    }

}