import matplotlib.pyplot as plt
import seaborn as sns
import numpy as np

def plot_scores(scores, outpath):
    plt.figure(figsize=(12,3))
    plt.plot(scores, linewidth=1)
    plt.title('Anomaly scores over time')
    plt.xlabel('Window index')
    plt.ylabel('Score')
    plt.tight_layout()
    plt.savefig(outpath)
    plt.close()

def plot_heatmap(saliency, outpath):
    # saliency: seq_len x channels
    plt.figure(figsize=(8,4))
    sns.heatmap(saliency.T, cmap='viridis')
    plt.xlabel('Time step')
    plt.ylabel('Channel')
    plt.tight_layout()
    plt.savefig(outpath)
    plt.close()