using System.Globalization;

namespace InnovEnergy.Lib.Devices.BatteryDeligreen;

public class TelemetryFrameParser
{
   private static Int32 _currentIndex;
   private const Int32 FrameLenght = 286;

    public void ParsingTelemetryFrame(String response)
    {
        
        _currentIndex = 0;  // Reset currentIndex to the start

        if (string.IsNullOrEmpty(response) || response.Length < FrameLenght)
        {
            Console.WriteLine("Response is too short to contain valid data.");
            return;
        }

        // Check starting byte
        string startingByte = response.Substring(_currentIndex, 2).ToUpper();
        if (startingByte == "7E")
        {
            Console.WriteLine($"Starting byte: {startingByte} (Hex)");
        }
        else
        {
            Console.WriteLine($"Incorrect starting byte: {startingByte}");
            return;
        }
        _currentIndex += 2;

        // Extract firmware version
        var versionBytes = response.Substring(_currentIndex, 4);
        try
        {
            String versionAscii = HexToAscii(versionBytes);
            Console.WriteLine($"Firmware version: {versionBytes} (Hex), ASCII: {versionAscii}");
        }
        catch (Exception)
        {
            Console.WriteLine($"Failed to decode firmware version from bytes: {versionBytes}");
            return;
        }
        _currentIndex += 4;

        // Extract and parse other fields
        ParseAndPrintHexField(response, "Device Address", 4);
        ParseAndPrintHexField(response, "Device Code (CID1)", 4);
        ParseAndPrintHexField(response, "Function Code", 4);
        ParseAndPrintHexField(response, "Length Code", 8);
        ParseAndPrintHexField(response, "Data Flag", 4);
        ParseAndPrintHexField(response, "Command Group", 4);
        ParseAndPrintHexField(response, "Number of Cells", 4);

        // Process voltages for all 16 cells
        for (var i = 0; i < 16; i++)
        {
            String cellVoltageBytes = response.Substring(_currentIndex, 8);
            try
            {
                var cellVoltageAscii = HexToAscii(cellVoltageBytes);
                var cellVoltageDecimal = HexToDecimal(cellVoltageAscii) / 1000.0;  // cell voltage are divided 1000
                Console.WriteLine($"Voltage of Cell {i + 1}: {cellVoltageBytes} (Hex), ASCII: {cellVoltageAscii}, Voltage: {cellVoltageDecimal:F3} V");
            }
            catch (Exception)
            {
                Console.WriteLine($"Failed to decode Voltage of Cell {i + 1} from bytes: {cellVoltageBytes}");
            }
            _currentIndex += 8;
        }

        // Parse other fields
        ParseAndPrintHexField(response, "Number of Temperature Sensors", 4);

        // Parse cell temperatures
        for (var i = 1; i <= 4; i++)
        {
            ParseAndPrintTemperatureField(response, $"Cell Temperature {i}");
        }

        // Parse other temperature and battery information
        ParseAndPrintTemperatureField(response, "Environment Temperature");
        ParseAndPrintTemperatureField(response, "Power Temperature");
        ParseAndPrintField(response, "Charge/Discharge Current", 8, value => value / 100.0, "A");
        ParseAndPrintField(response, "Total Battery Voltage", 8, value => value / 100.0, "V");
        ParseAndPrintField(response, "Residual Capacity", 8, value => value / 100.0, "Ah");
        ParseAndPrintHexField(response, "Custom Number", 4);
        ParseAndPrintField(response, "Battery Capacity", 8, value => value / 100.0, "Ah");
        ParseAndPrintField(response, "SOC", 8, value => value / 10.0, "%");
        ParseAndPrintField(response, "Rated Capacity", 8, value => value / 100.0, "Ah");
        ParseAndPrintHexField(response, "Number of Cycles", 8);
        ParseAndPrintField(response, "SOH", 8, value => value / 10.0, "%");
        ParseAndPrintField(response, "Bus Voltage", 8, value => value / 100.0, "V");
    }

    private static void ParseAndPrintHexField(String response, String fieldName, int length)
    {
        var hexBytes = response.Substring(_currentIndex, length);
        try
        {
            var asciiValue = HexToAscii(hexBytes);
            var decimalValue = int.Parse(asciiValue, NumberStyles.HexNumber);
            Console.WriteLine($"{fieldName}: {hexBytes} (Hex), ASCII: {asciiValue}, Decimal: {decimalValue}");
        }
        catch (Exception)
        {
            Console.WriteLine($"Failed to decode {fieldName} from bytes: {hexBytes}");
        }
        _currentIndex += length;
    }

    private static void ParseAndPrintTemperatureField(String response, String fieldName)
    {
        var tempBytes = response.Substring(_currentIndex, 8);
        try
        {
            var tempAscii = HexToAscii(tempBytes);
            var tempDecimal = (HexToDecimal(tempAscii) - 2731) / 10.0;
            Console.WriteLine($"{fieldName}: {tempBytes} (Hex), ASCII: {tempAscii}, Temperature: {tempDecimal:F2} °C");
        }
        catch (Exception)
        {
            Console.WriteLine($"Failed to decode {fieldName} from bytes: {tempBytes}");
        }
        _currentIndex += 8;
    }

    private static void ParseAndPrintField(String response, String fieldName, Int32 length, Func<Double, Double> conversion, String unit)
    {
        var fieldBytes = response.Substring(_currentIndex, length);
        try
        {
            var fieldAscii = HexToAscii(fieldBytes);
            var fieldDecimal = conversion(HexToDecimal(fieldAscii));
            Console.WriteLine($"{fieldName}: {fieldBytes} (Hex), ASCII: {fieldAscii}, {fieldName}: {fieldDecimal:F3} {unit}");
        }
        catch (Exception)
        {
            Console.WriteLine($"Failed to decode {fieldName} from bytes: {fieldBytes}");
        }
        _currentIndex += length;
    }

    private static String HexToAscii(String hex)
    {
        var bytes = new Byte[hex.Length / 2];
        for (var i = 0; i < hex.Length; i += 2)
        {
            bytes[i / 2] = byte.Parse(hex.Substring(i, 2), NumberStyles.HexNumber);
        }
        return System.Text.Encoding.ASCII.GetString(bytes);
    }

    private static double HexToDecimal(String hex)
    {
        return int.Parse(hex, NumberStyles.HexNumber);
    }
}