//! MEM8 Lite - Minimal wave-based memory for Smart Tree
//!
//! This is a self-contained subset of mem8-core from the Aye project.
//! It provides the Wave struct for hot directory tracking without
//! requiring the full MEM8 crate as a dependency.
//!
//! "Memory is wave interference patterns in cognitive space." - MEM8
use serde::{Deserialize, Serialize};
/// A wave pattern representing activity/state
///
/// For hot directory tracking, we use:
/// - frequency: Change rate (events per hour)
/// - emotional_valence: Security concern (-1.0 danger to +1.0 safe)
/// - arousal: Activity level (0.0 cold to 1.0 hot)
#[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
pub struct Wave {
/// Frequency in Hz (for directories: change rate)
pub frequency: f64,
/// Emotional valence (-1.0 to 1.0) - security concern level
pub emotional_valence: f64,
/// Arousal level (0.0 to 1.0) - activity/hotness
pub arousal: f64,
}
impl Wave {
/// Create a new wave
pub fn new(frequency: f64, emotional_valence: f64, arousal: f64) -> Self {
Self {
frequency,
emotional_valence: emotional_valence.clamp(-1.0, 1.0),
arousal: arousal.clamp(0.0, 1.0),
}
}
/// Compute resonance score with another wave
///
/// Higher score = more similar frequencies and emotional states.
/// Used to detect directories with correlated activity patterns.
pub fn resonance_with(&self, other: &Wave) -> f64 {
// Frequency similarity (closer = higher score)
let freq_diff = (self.frequency - other.frequency).abs();
let max_freq = self.frequency.max(other.frequency);
let freq_score = if max_freq > 0.0 {
(-freq_diff / max_freq).exp()
} else {
1.0
};
// Emotional similarity
let valence_diff = (self.emotional_valence - other.emotional_valence).abs();
let arousal_diff = (self.arousal - other.arousal).abs();
let emotion_score = 1.0 - ((valence_diff + arousal_diff) / 4.0);
// Combined resonance (weighted average)
0.7 * freq_score + 0.3 * emotion_score
}
}
impl Default for Wave {
fn default() -> Self {
Self::new(1.0, 0.0, 0.5)
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_wave_creation() {
let wave = Wave::new(10.0, 0.5, 0.8);
assert_eq!(wave.frequency, 10.0);
assert_eq!(wave.emotional_valence, 0.5);
assert_eq!(wave.arousal, 0.8);
}
#[test]
fn test_clamping() {
let wave = Wave::new(1.0, 2.0, -0.5);
assert_eq!(wave.emotional_valence, 1.0); // Clamped
assert_eq!(wave.arousal, 0.0); // Clamped
}
#[test]
fn test_resonance_identical() {
let wave1 = Wave::new(10.0, 0.5, 0.5);
let wave2 = Wave::new(10.0, 0.5, 0.5);
let resonance = wave1.resonance_with(&wave2);
assert!(resonance > 0.95); // Nearly identical
}
#[test]
fn test_resonance_different() {
let wave1 = Wave::new(10.0, 0.5, 0.5);
let wave2 = Wave::new(100.0, -0.5, 0.1);
let similar_resonance = wave1.resonance_with(&Wave::new(11.0, 0.5, 0.5));
let different_resonance = wave1.resonance_with(&wave2);
assert!(similar_resonance > different_resonance);
}
}
