// Generated, do not edit. sha256:50118a60294dbc8f28d9357f89a87533bb1550041305794ac6ceb8f28c573fcc
import { compare } from './table-rows.js';

const SEP = '\u0000';

export function groupSections(rows, { columns, groupKey, groupKey2 = null, groupKey3 = null, sort = null, collapsed = null }) {
  const col = columns.find(c => c.key === groupKey);
  const col2 = groupKey2 ? columns.find(c => c.key === groupKey2) : null;
  const col3 = groupKey3 ? columns.find(c => c.key === groupKey3) : null;
  const orderOf = (c, key) => ((sort && sort.key === key) ? sort.dir : (c.group.order || 'asc'));
  const order = orderOf(col, groupKey);
  const order2 = col2 ? orderOf(col2, groupKey2) : 'asc';
  const order3 = col3 ? orderOf(col3, groupKey3) : 'asc';

  const buckets = new Map();
  for (const r of rows) {
    const v1 = col.group.value(r);
    const v2 = col2 ? col2.group.value(r) : null;
    const v3 = col3 ? col3.group.value(r) : null;
    const key = [String(v1), col2 ? String(v2) : '', col3 ? String(v3) : ''].join(SEP);
    if (!buckets.has(key)) buckets.set(key, { v1, v2, v3, items: [] });
    buckets.get(key).items.push(r);
  }
  const entries = [...buckets.values()].sort((a, b) => {
    const c1 = compare(a.v1, b.v1, order);
    if (c1 !== 0 || !col2) return c1;
    const c2 = compare(a.v2, b.v2, order2);
    return (c2 !== 0 || !col3) ? c2 : compare(a.v3, b.v3, order3);
  });

  let itemsByV1 = null;
  if (collapsed) {
    itemsByV1 = new Map();
    for (const e of entries) {
      const tk = String(e.v1);
      if (!itemsByV1.has(tk)) itemsByV1.set(tk, []);
      itemsByV1.get(tk).push(...e.items);
    }
  }
  const shownCollapsed = new Set();
  const out = [];
  for (const { v1, v2, v3, items } of entries) {
    const token = String(v1);
    const l1 = col.group.label ? col.group.label(v1) : v1;
    if (collapsed && collapsed.has(token)) {
      if (shownCollapsed.has(token)) continue;
      shownCollapsed.add(token);
      out.push({ token, value: v1, label: l1, items: itemsByV1.get(token) || items, collapsed: true });
      continue;
    }
    let label = l1;
    if (col2) label += ` - ${col2.group.label ? col2.group.label(v2) : v2}`;
    if (col3) label += ` - ${col3.group.label ? col3.group.label(v3) : v3}`;
    out.push({ token, value: v1, label, items, collapsed: false });
  }
  return out;
}