"""
Conversion factors and constants for unit conversions.

This module contains all the numerical constants used for converting between
different units of measurement in the BasicAgent calculation tools.

Extracted from BasicAgent._init_calculation_tools() for better modularity
and maintainability.
"""

# Length conversion factors
LENGTH_CONVERSIONS = {
    "meters_to_feet": 3.28084,
    "feet_to_meters": 0.3048,
    "inches_to_cm": 2.54,
    "cm_to_inches": 0.393701,
    "miles_to_km": 1.60934,
    "km_to_miles": 0.621371,
}

# Weight conversion factors
WEIGHT_CONVERSIONS = {
    "kg_to_pounds": 2.20462,
    "pounds_to_kg": 0.453592,
}

# Area conversion factors
AREA_CONVERSIONS = {
    "sqft_to_sqm": 0.092903,
    "sqm_to_sqft": 10.7639,
}

# Temperature conversion formulas (as constants for reference)
# Note: Temperature conversions are handled by formulas, not simple factors
TEMPERATURE_CONVERSION_INFO = {
    "celsius_to_fahrenheit": "F = (C * 9/5) + 32",
    "fahrenheit_to_celsius": "C = (F - 32) * 5/9",
}

# Combined conversion factors dictionary
# This maintains compatibility with the original implementation
CONVERSION_FACTORS = {
    **LENGTH_CONVERSIONS,
    **WEIGHT_CONVERSIONS,
    **AREA_CONVERSIONS,
}

# Additional conversion factors that might be useful for future expansion
EXTENDED_CONVERSIONS = {
    # Volume conversions
    "liters_to_gallons": 0.264172,
    "gallons_to_liters": 3.78541,
    "ml_to_fl_oz": 0.033814,
    "fl_oz_to_ml": 29.5735,
    
    # Time conversions
    "minutes_to_seconds": 60,
    "hours_to_minutes": 60,
    "days_to_hours": 24,
    "weeks_to_days": 7,
    
    # Speed conversions
    "mph_to_kph": 1.60934,
    "kph_to_mph": 0.621371,
    "mps_to_mph": 2.23694,
    "mph_to_mps": 0.44704,
    
    # Energy conversions
    "joules_to_calories": 0.239006,
    "calories_to_joules": 4.184,
    "kWh_to_joules": 3600000,
    "joules_to_kWh": 2.77778e-7,
}

# Utility functions for conversion operations
def get_conversion_factor(from_unit: str, to_unit: str) -> float:
    """
    Get conversion factor for converting from one unit to another.
    
    Args:
        from_unit (str): Source unit
        to_unit (str): Target unit
        
    Returns:
        float: Conversion factor, or None if not found
        
    Example:
        >>> get_conversion_factor("meters", "feet")
        3.28084
    """
    key = f"{from_unit}_to_{to_unit}"
    return CONVERSION_FACTORS.get(key)

def get_all_conversions():
    """
    Get all available conversion factors.
    
    Returns:
        dict: All conversion factors including extended ones
    """
    return {**CONVERSION_FACTORS, **EXTENDED_CONVERSIONS}

def get_conversion_categories():
    """
    Get conversion factors organized by category.
    
    Returns:
        dict: Conversion factors grouped by type
    """
    return {
        "length": LENGTH_CONVERSIONS,
        "weight": WEIGHT_CONVERSIONS,
        "area": AREA_CONVERSIONS,
        "extended": EXTENDED_CONVERSIONS,
    }

# Constants for precision and formatting
CONVERSION_PRECISION = 2  # Default decimal places for conversion results
MAX_DECIMAL_PLACES = 6   # Maximum decimal places to avoid floating point errors