Z-Order Optimization in Python

class ZOrderLayout:
    """
    Minimal mock for z-order layout optimization using a stacking score.
    Elements overlap; higher z_index is drawn on top.
    """
    def __init__(self):
        self.elements = []

    def add_element(self, name, area, z_index):
        self.elements.append({"name": name, "area": area, "z": z_index})
        self.elements.sort(key=lambda e: (e["z"], e["area"]), reverse=True)

    def optimize(self):
        """Reassign z-indices to match sort order (most area on top)."""
        for pos, el in enumerate(self.elements):
            el["z"] = pos
        self.elements.sort(key=lambda e: e["z"])
        return [(el["name"], el["z"]) for el in self.elements]


if __name__ == "__main__":
    layout = ZOrderLayout()
    layout.add_element("header", 1200, 1)
    layout.add_element("sidebar", 800, 5)
    layout.add_element("content", 2500, 3)
    layout.add_element("footer", 900, 2)

    print("Initial order:", [e["name"] for e in layout.elements])
    result = layout.optimize()
    print("Optimized z-order (area-driven):", result)