Untitled

import math

class GHICalculator:
    # Dew point ranges and their corresponding comfort levels and colors
    COMFORT_RANGES = [
        {'max': 10, 'label': 'dry', 'color': '#5ECBFC'},
        {'max': 15, 'label': 'very comfortable', 'color': '#62FF3B'},
        {'max': 18, 'label': 'comfortable', 'color': '#CBFF73'},
        {'max': 20, 'label': 'alright', 'color': '#FFFF9E'},
        {'max': 24, 'label': 'uncomfortable', 'color': '#FFD239'},
        {'max': 26, 'label': 'very uncomfortable', 'color': '#FF981E'},
        {'max': float('inf'), 'label': 'severely uncomfortable', 'color': '#FF6610'}
    ]

    @staticmethod
    def calculate_relative_humidity(temperature: float, dew_point: float) -> float:
        """
        Calculate relative humidity using Magnus-Tetens formula
        
        Args:
            temperature (float): Temperature in Celsius
            dew_point (float): Dew point in Celsius
            
        Returns:
            float: Relative humidity as a percentage
        """
        # Constants for Magnus-Tetens formula
        a = 17.27
        b = 237.7
        
        # Calculate saturation vapor pressure at temperature
        sat_vapor_pressure = 6.112 * pow(2.71828, (a * temperature) / (temperature + b))
        
        # Calculate actual vapor pressure using dew point
        act_vapor_pressure = 6.112 * pow(2.71828, (a * dew_point) / (dew_point + b))
        
        # Calculate relative humidity
        rh = (act_vapor_pressure / sat_vapor_pressure) * 100
        return min(100, max(0, rh))  # Ensure RH is between 0-100%

    @staticmethod
    def calculate_ghi(dew_point: float, temperature: float = None) -> dict:
        """
        Calculate the Global Humidity Index (GHI) based on dew point.
        
        Args:
            dew_point (float): Dew point temperature in Celsius
            temperature (float): Not used in new calculation, kept for backwards compatibility
            
        Returns:
            dict: Contains GHI value, comfort level label, and color code
        """
        # Normalize dew point to 0-100 scale
        normalized_ghi = math.ceil((dew_point / 38) * 100)
        normalized_ghi = max(0, min(100, normalized_ghi))  # Ensure it's between 0-100

        # Determine comfort level and color based on dew point
        comfort_info = None
        for range_info in GHICalculator.COMFORT_RANGES:
            if dew_point <= range_info['max']:
                comfort_info = range_info
                break

        return {
            'ghi': normalized_ghi,
            'comfort_level': comfort_info['label'],
            'color': comfort_info['color']
        }
    
    @staticmethod
    def get_comfort_level(ghi: float) -> str:
        """
        Get comfort level based on dew point (GHI value).
        
        Args:
            ghi (float): Dew point value in Celsius
            
        Returns:
            str: Comfort level description
        """
        for range_info in GHICalculator.COMFORT_RANGES:
            if ghi <= range_info['max']:
                return range_info['label']
        return GHICalculator.COMFORT_RANGES[-1]['label']