import numpy as np

EMOTIONS = ["angry", "happy", "sad", "neutral"]

def simple_rule_classifier(features):
    pitch = features[-2]
    energy = features[-1]

    # Basic heuristics (you can improve later)
    if energy > 0.1 and pitch > 150:
        return "happy", 0.7
    elif energy > 0.15 and pitch < 120:
        return "angry", 0.7
    elif energy < 0.05:
        return "sad", 0.7
    else:
        return "neutral", 0.6