import matplotlib.pyplot as plt

def plot_architecture_diagram(config):
    try:
        fig, ax = plt.subplots(figsize=(6, 2))  # reduced size
        layers = config.get("layers", 4)
        heads = config.get("attention_heads", 4)
        ffn = config.get("ffn_dim", 1024)
        mem = config.get("memory", False)

        labels = []
        for i in range(layers):
            lbl = f"L{i+1}\n{heads}H\n{ffn}F"
            if mem and i == layers // 2:
                lbl += "\nMem"
            labels.append(lbl)

        ax.plot(range(layers), [1] * layers, "o-", linewidth=2)
        for i, label in enumerate(labels):
            ax.text(i, 1.02, label, ha="center", fontsize=8)

        ax.set_ylim(0.9, 1.15)
        ax.axis("off")

        fig.savefig("architecture_diagram.png", bbox_inches="tight", dpi=150)
        plt.close(fig)
    except Exception as e:
        print("⚠️ Diagram plot error:", e)