/* query.js —— 筛选与搜索（纯函数，可单独测试）。
 * 维度的取值放在 hash 里，多选维度用逗号连接；结果 = 各维度条件的交集。 */
(function () {
  "use strict";

  const T = window.KF_TAXONOMY;

  function parseList(v) {
    return v ? String(v).split(",").map((s) => s.trim()).filter(Boolean) : [];
  }

  /* 构造"生效中的筛选条件" */
  function criteria(q) {
    return {
      priority: parseList(q.priority),
      stage: parseList(q.stage),
      category: parseList(q.category),
      evidence: parseList(q.evidence),
      layer: parseList(q.layer),
      member: parseList(q.member),
      q: (q.q || "").trim().toLowerCase(),
      sort: q.sort || "",
      ins: q.ins || "",
      focus: q.focus || ""
    };
  }

  function isEmpty(c) {
    return !c.priority.length && !c.stage.length && !c.category.length && !c.evidence.length &&
      !c.layer.length && !c.member.length && !c.q;
  }

  /* 多个维度各自"任一命中"即通过，维度之间取交集 */
  function test(row, c) {
    if (c.priority.length && !c.priority.includes(row.priority)) return false;
    if (c.stage.length && !(row.stageObj && c.stage.includes(row.stageObj.code))) return false;
    if (c.category.length && !c.category.includes(row.category)) return false;
    if (c.evidence.length && !c.evidence.includes(row.evidenceKey || row.evidenceLevel)) return false;
    if (c.layer.length && !c.layer.includes(row.layer)) return false;
    if (c.member.length && !c.member.includes(row.ownerName)) return false;
    if (c.q) {
      const hay = [row.title, row.ownerName, row.category, row.projectTitle, row.summary, row.body]
        .filter(Boolean).join(" ").toLowerCase();
      if (!hay.includes(c.q)) return false;
    }
    return true;
  }

  /* 逐维度计数：用于在筛选条上显示"如果只点这一项会有几条"，且该计数会受其他维度约束 */
  function facetCounts(rows, c, dim, keyFn) {
    const rest = { ...c, [dim]: [] };
    const m = new Map();
    for (const r of rows) {
      if (!test(r, rest)) continue;
      const k = keyFn(r);
      if (k == null) continue;
      m.set(k, (m.get(k) || 0) + 1);
    }
    return m;
  }

  /* 组内去重成员数（归纳交叉人数用同一口径） */
  function distinctOwners(rows) {
    return new Set(rows.map((r) => r.ownerKey || r.ownerName).filter(Boolean)).size;
  }

  window.KF_QUERY = { parseList, criteria, isEmpty, test, facetCounts, distinctOwners };
})();