"""
Shunollo Network Physics
========================
Physics of signal propagation, impedance, and topology.
Handles Cable Theory and Reflection logic.
"""
import math

class PropagationPhysics:
    """Cable theory: length constant for signal propagation."""
    @staticmethod
    def calculate_length_constant(membrane_resistance: float, axial_resistance: float) -> float:
        if axial_resistance <= 0: return float('inf')
        return math.sqrt(membrane_resistance / axial_resistance)
    
    @staticmethod
    def signal_at_distance(initial_amplitude: float, distance: float, length_constant: float) -> float:
        if length_constant <= 0: return 0.0
        return initial_amplitude * math.exp(-distance / length_constant)
    
    @staticmethod
    def propagation_radius(initial_amplitude: float, threshold: float, length_constant: float) -> float:
        if initial_amplitude <= threshold: return 0.0
        return length_constant * math.log(initial_amplitude / threshold)

class ImpedanceAnalyzer:
    """Acoustic impedance matching for protocol boundary analysis."""
    @staticmethod
    def calculate_impedance(density: float, velocity: float) -> float:
        return density * velocity
    
    @staticmethod
    def reflection_coefficient(z1: float, z2: float) -> float:
        if z1 + z2 <= 0: return 1.0
        ratio = (z2 - z1) / (z2 + z1)
        return ratio ** 2
    
    @staticmethod
    def transmission_efficiency(z1: float, z2: float) -> float:
        return 1.0 - ImpedanceAnalyzer.reflection_coefficient(z1, z2)
    
    @staticmethod
    def required_transformer_ratio(z_source: float, z_load: float) -> float:
        if z_source <= 0: return 1.0
        return math.sqrt(z_load / z_source)

def calculate_manifold_distance(current_dist: dict, baseline_dist: dict) -> float:
    """Information Geometry (Proxy)."""
    # Placeholder until full Fisher Metric
    return 0.5 
