// Display-only summaries of the records already authorized by the server.
export function summarizeHomes(homes = []) {
  const kinds = [
    { key: 'home', label: '家庭', color: '#258b76', count: 0 },
    { key: 'office', label: '办公', color: '#5c83cb', count: 0 },
    { key: 'factory', label: '工厂', color: '#c69a52', count: 0 },
    { key: 'other', label: '其他', color: '#8997a9', count: 0 },
  ];
  let devices = 0, areas = 0;
  for (const home of homes) {
    (kinds.find(k => k.key === (home.kind || 'home')) || kinds[3]).count++;
    devices += Math.max(0, Number(home.deviceCount) || 0);
    areas += Math.max(0, Number(home.sites) || 0);
  }
  let offset = 0;
  return { total: homes.length, devices, areas, kinds: kinds.filter(k => k.count).map(k => {
    const value = { ...k, share: k.count / homes.length * 100, offset };
    offset += value.share;
    return value;
  }) };
}

export function layoutNetwork(rows = []) {
  const nodes = rows.map((row, index) => ({
    ...row, x: 28 + Math.max(0, row.depth) * 300, y: 26 + index * 112,
  }));
  const byId = new Map(nodes.map(n => [n.device.id, n]));
  const edges = nodes.flatMap(node => {
    const parent = byId.get(node.device.uplinkId);
    // Only draw an edge when the validated hierarchy confirms the parent.
    if (!parent || parent.depth + 1 !== node.depth) return [];
    const x = parent.x + 244, y = parent.y + 40, endY = node.y + 40;
    return [{ id: node.device.id, path: `M${x},${y} H${x + 24} V${endY} H${node.x}` }];
  });
  return { nodes, edges, width: Math.max(640, ...nodes.map(n => n.x + 272)), height: Math.max(172, nodes.length * 112 + 26) };
}