(() => {
  const { Bodies } = Matter;
  const scenes = (window.PhysilinksSceneDefs =
    window.PhysilinksSceneDefs || []);

  scenes.push({
    id: "stack-blocks",
    name: "Stack Blocks",
    config: {
      gravity: 1.85,
      spawnIntervalMs: 900,
      autoSpawn: true,
      minChain: 3,
      palette: ["#38bdf8", "#f97316", "#facc15", "#22c55e"],
      ballRadius: 18,
      ballShape: "rect",
      spawnColumns: 10,
      sizeFromColumns: true,
      initialRows: 3,
      requireClearSpawn: true,
      squarePlayArea: true,
      rowGapMultiplier: 1,
      spawnInsets: ({ width }) => {
        const wallThickness = Math.max(20, width * 0.02);
        return { left: 0, right: 0 };
      },
      winCondition: {
        type: "clearCount",
        target: 100,
      },
      link: {
        stiffness: 0.85,
        lengthScale: 1.05,
        damping: 0.08,
        lineWidth: 3,
        rope: true,
        renderType: "line",
        maxLengthMultiplier: 2.5,
        clearAnimation: {
          type: "shatter",
          durationMs: 380,
          sizeScale: 2.2,
        },
      },
    },
    createBodies: (w, h) => {
      const squareSize = Math.min(w, h);
      const left = (w - squareSize) / 2;
      const top = (h - squareSize) / 2;
      const wallThickness = Math.max(20, w * 0.02);
      const floorHeight = Math.max(30, squareSize * 0.06);
      const wallRender = {
        fillStyle: "#1e293b",
        strokeStyle: "#94a3b8",
        lineWidth: 2,
      };
      return [
        Bodies.rectangle(
          left - wallThickness / 2,
          h / 2,
          wallThickness,
          h + wallThickness * 2,
          {
            isStatic: true,
            render: wallRender,
          },
        ),
        Bodies.rectangle(
          left + squareSize + wallThickness / 2,
          h / 2,
          wallThickness,
          h + wallThickness * 2,
          {
            isStatic: true,
            render: wallRender,
          },
        ),
        Bodies.rectangle(
          w / 2,
          h + floorHeight / 2,
          w + wallThickness * 2,
          floorHeight,
          {
            isStatic: true,
            restitution: 0.2,
            render: wallRender,
          },
        ),
      ];
    },
  });
})();