// Visual Control Plane — client (vanilla JS, D3 from CDN)
// Design note: KB data flows from local jsonl files we control, but we
// still use DOM methods (createElement/textContent) for every
// data-derived node to satisfy static analysis and keep a clean XSS
// boundary if the UI ever gets exposed.

const POLL_MS = 3000;

const state = {
  view: "map",
  overlay: "status",
  selected: null,
  services: null,
  reviews: [],
  metrics: [],
  overrides: [],
  trust: [],
  findings: [],
};

// ───── view switcher ─────
document.querySelectorAll("#views button").forEach(b => {
  b.addEventListener("click", () => {
    document.querySelectorAll("#views button").forEach(x => x.classList.remove("on"));
    b.classList.add("on");
    state.view = b.dataset.view;
    document.querySelectorAll(".view").forEach(v => v.classList.remove("on"));
    document.getElementById(`view-${state.view}`).classList.add("on");
    renderView();
  });
});

document.querySelectorAll("#overlay-controls button").forEach(b => {
  b.addEventListener("click", () => {
    document.querySelectorAll("#overlay-controls button").forEach(x => x.classList.remove("on"));
    b.classList.add("on");
    state.overlay = b.dataset.ov;
    if (state.services) drawMap(state.services);
  });
});

// ───── helpers ─────
function el(tag, opts = {}, ...kids) {
  const n = document.createElement(tag);
  if (opts.className) n.className = opts.className;
  if (opts.text != null) n.textContent = String(opts.text);
  if (opts.data) for (const k in opts.data) n.dataset[k] = opts.data[k];
  if (opts.attrs) for (const k in opts.attrs) n.setAttribute(k, opts.attrs[k]);
  if (opts.style) for (const k in opts.style) n.style[k] = opts.style[k];
  for (const k of kids) if (k != null) n.append(k);
  return n;
}
function clear(node) { while (node.firstChild) node.removeChild(node.firstChild); }
function row(k, v, valClass) {
  const r = el("div", { className: "ctx-row" });
  r.append(el("span", { className: "k", text: k }));
  const vv = el("span", { className: "v" + (valClass ? " " + valClass : ""), text: String(v ?? "-") });
  r.append(vv);
  return r;
}
function short(v) {
  if (v == null) return "-";
  if (typeof v === "object") return JSON.stringify(v).slice(0, 80);
  return String(v).slice(0, 80);
}

// ───── polling ─────
async function poll() {
  try {
    const [svc, rev, met, ov, tr, fin] = await Promise.all([
      fetch("/data/services").then(r => r.json()),
      fetch("/data/reviews?tail=80").then(r => r.json()),
      fetch("/data/metrics").then(r => r.json()),
      fetch("/data/overrides").then(r => r.json()),
      fetch("/data/trust").then(r => r.json()),
      fetch("/data/findings").then(r => r.json()),
    ]);
    state.services = svc;
    state.reviews = Array.isArray(rev) ? rev : [];
    state.metrics = Array.isArray(met) ? met : [];
    state.overrides = Array.isArray(ov) ? ov : [];
    state.trust = Array.isArray(tr) ? tr : [];
    state.findings = Array.isArray(fin) ? fin : [];
    document.getElementById("build-ts").textContent = new Date(svc.ts).toLocaleTimeString();
    svc.nodes.forEach(n => {
      const chip = document.querySelector(`.hbchip[data-svc="${n.id}"]`);
      if (chip) chip.setAttribute("data-status", n.status);
    });
    renderView();
    renderContext();
    pollStream();
  } catch (e) { console.error("poll error", e); }
}

async function pollStream() {
  try {
    const j = await fetch("/data/scrum_log").then(r => r.json());
    if (!j.lines) return;
    document.getElementById("stream-file").textContent = j.file ? j.file.split("/").pop() : "—";
    const body = document.getElementById("stream-body");
    clear(body);
    j.lines.slice(-30).forEach(line => {
      const cls = /✓ ACCEPTED/.test(line) ? "ok"
        : /✗ thin/.test(line) ? "thin"
        : /error|failed|FAIL/i.test(line) ? "err"
        : /^\[scrum\] file:/.test(line) ? "head"
        : "info";
      body.append(el("div", { className: "sline " + cls, text: line }));
    });
    body.scrollTop = body.scrollHeight;
  } catch {}
}

function renderView() {
  if (!state.services) return;
  if (state.view === "map") drawMap(state.services);
  else if (state.view === "trace") drawTrace();
  else if (state.view === "trajectory") drawTrajectory();
  else if (state.view === "metrics") drawMetrics();
  else if (state.view === "kb") drawKB();
  else if (state.view === "console") drawConsole();
}

// ───── MAP ─────
const NODES_STATIC = [
  { id: "gateway",  x: 0.5,  y: 0.15 },
  { id: "sidecar",  x: 0.2,  y: 0.3 },
  { id: "observer", x: 0.8,  y: 0.3 },
  { id: "mcp",      x: 0.85, y: 0.1 },
  { id: "context7", x: 0.15, y: 0.1 },
  { id: "journal",  x: 0.35, y: 0.55 },
  { id: "vectord",  x: 0.5,  y: 0.5 },
  { id: "playbook", x: 0.65, y: 0.55 },
  { id: "agent",    x: 0.5,  y: 0.75 },
  { id: "usage",    x: 0.2,  y: 0.75 },
];
const EDGES = [
  ["gateway","sidecar"],["gateway","observer"],["gateway","mcp"],["gateway","context7"],
  ["gateway","journal"],["gateway","vectord"],["gateway","playbook"],["gateway","agent"],["gateway","usage"],
  ["vectord","playbook"],["agent","vectord"],["observer","playbook"],["sidecar","vectord"],
];

function drawMap(svc) {
  const svg = d3.select("#map");
  const box = svg.node().getBoundingClientRect();
  const W = box.width, H = box.height;
  svg.selectAll("*").remove();
  const statusMap = {};
  [...svc.nodes, ...svc.subsystems].forEach(n => statusMap[n.id] = n);
  svg.selectAll(".edge").data(EDGES).enter().append("line")
    .attr("class", d => "edge" + (overlayEdgeActive(d) ? " active" : ""))
    .attr("x1", d => nodePos(d[0]).x * W).attr("y1", d => nodePos(d[0]).y * H)
    .attr("x2", d => nodePos(d[1]).x * W).attr("y2", d => nodePos(d[1]).y * H);
  const g = svg.selectAll(".node").data(NODES_STATIC).enter().append("g")
    .attr("class", "node")
    .attr("transform", d => `translate(${d.x * W}, ${d.y * H})`)
    .on("click", (_ev, d) => { state.selected = { type:"node", id:d.id }; renderContext(); drawMap(svc); });
  g.append("circle")
    .attr("class", d => "node-circle" + (state.selected?.type==="node" && state.selected.id===d.id ? " node-selected" : ""))
    .attr("r", d => nodeRadius(d, statusMap))
    .attr("fill", d => nodeColor(d, statusMap));
  // SVG tooltip — hover a node, browser shows a native tooltip with
  // what this node DOES, not just its name.
  g.append("title").text(d => nodeTooltip(d.id));
  g.append("text").attr("class","node-label").attr("y", -30).text(d => nodeLabel(d.id));
  g.append("text").attr("class","node-sub").attr("y", 40).text(d => nodeSub(d, statusMap));
}
function nodePos(id) { return NODES_STATIC.find(x => x.id === id) ?? { x:0, y:0 }; }
function nodeLabel(id) {
  return ({gateway:"GATEWAY",sidecar:"SIDECAR",observer:"OBSERVER",mcp:"MCP",context7:"CTX7",
    journal:"JOURNAL",vectord:"VECTORD",playbook:"PLAYBOOK",agent:"AUTOTUNE",usage:"USAGE"})[id] ?? id;
}
function nodeRadius(d, m) {
  const n = m[d.id];
  if (state.overlay === "activity") {
    if (d.id === "journal" && n?.stats?.total_events_created != null) return 14 + Math.min(20, Math.log2(n.stats.total_events_created + 1) * 2);
    if (d.id === "vectord" && n?.stats?.count != null) return 14 + Math.min(20, Math.log2(n.stats.count + 1) * 2);
    if (d.id === "playbook" && n?.stats?.total != null) return 14 + Math.min(20, Math.log2(n.stats.total + 1));
    if (d.id === "observer" && n?.stats?.total != null) return 14 + Math.min(20, Math.log2(n.stats.total + 1));
    if (d.id === "usage" && n?.stats?.requests != null) return 14 + Math.min(20, Math.log2(n.stats.requests + 1) * 2);
  }
  return 18;
}
function nodeColor(d, m) {
  const n = m[d.id];
  const ov = state.overlay;
  if (ov === "status" || ov === "activity") {
    const st = n?.status ?? (n?.stats ? "healthy" : "unknown");
    return { healthy:"#3eed86", degraded:"#ffbf3c", down:"#ff4d6e", unknown:"#525c6f" }[st] ?? "#525c6f";
  }
  if (ov === "confidence") {
    const c = recentAvgConfidence(d.id);
    if (c == null) return "#525c6f";
    if (c >= 88) return "#3eed86";
    if (c >= 70) return "#55c5ff";
    if (c >= 50) return "#ffbf3c";
    return "#ff4d6e";
  }
  if (ov === "gradient") {
    const t = recentGradientTier(d.id);
    return t ? ({auto:"#3eed86",dry_run:"#55c5ff",simulation:"#ffbf3c",block:"#ff4d6e"}[t] ?? "#525c6f") : "#525c6f";
  }
  if (ov === "verdict") {
    const v = recentVerdict(d.id);
    return {pass:"#3eed86",needs_patch:"#ff9f43",fail:"#ff4d6e"}[v] ?? "#525c6f";
  }
  return "#55c5ff";
}
function nodeSub(d, m) {
  const n = m[d.id];
  if (!n) return "…";
  if (d.id === "journal" && n.stats)  return `${n.stats.total_events_created ?? 0} events · ${n.stats.persisted_files ?? 0} parquet`;
  if (d.id === "usage" && n.stats)    return `${n.stats.requests ?? 0} requests · ${Math.round((n.stats.total_tokens ?? 0)/1000)}k tokens`;
  if (d.id === "vectord" && typeof n.stats === "object" && n.stats)  return `${n.stats.count ?? 0} indexes`;
  if (d.id === "playbook" && n.stats) return `${n.stats.active ?? 0} active · ${n.stats.retired ?? 0} retired`;
  if (d.id === "agent" && n.stats)    return `${n.stats.trials_run ?? 0} trials · ${n.stats.promotions ?? 0} promotions`;
  if (d.id === "observer" && n.stats) return `${n.stats.total ?? 0} observed ops`;
  return String(n.status ?? "");
}

// Describes what each node DOES — shown as SVG <title> tooltip.
function nodeTooltip(id) {
  return ({
    gateway:  "GATEWAY — Rust/Axum HTTP on :3100. Every external call enters here: /v1/chat, /ingest, /query, /tools, /journal, /vectors. Also hosts gRPC on :3101.",
    sidecar:  "SIDECAR — Python FastAPI on :3200. Adapter from Rust to local Ollama (:11434). Handles /embed /generate /rerank. Stateless.",
    observer: "OBSERVER — Bun on :3800. Ring buffer of recent ops across the system. Feeds analyzeErrors + PLAYBOOK_BUILDER loops. Scrum events now land here (P45 fix).",
    mcp:      "MCP — Bun on :3700. Model Context Protocol tool gateway. Agent-facing tool endpoints.",
    context7: "CONTEXT7 — Bun on :3900. Doc-drift resolver — checks playbook doc_refs against current docs for version drift (Phase 45 target).",
    journal:  "JOURNAL — ADR-012 append-only mutation log inside the gateway. Every ingest/delta-write/tombstone should record here. Currently ~1 real event (P9-001 still mostly unwired).",
    vectord:  "VECTORD — Embeddings store + HNSW index + autotune harness. The 'indexes' count = named vector indexes live right now (one per source × model_version).",
    playbook: "PLAYBOOK — Meta-index. Each entry = a successful past pattern + geo/role + 768d embedding. Active entries boost future vector-search results (Phase 19).",
    agent:    "AUTOTUNE — Background agent that continuously proposes HNSW config trials, picks Pareto winners above min_recall, promotes, and rolls back. Self-tuning vector index.",
    usage:    "USAGE — /v1/chat token counters. Tracks requests, prompt/completion tokens, per-provider breakdown. Grows with scrum + audit traffic.",
  })[id] ?? id;
}
function overlayEdgeActive(edge) {
  if (!state.reviews.length) return false;
  const latest = state.reviews[state.reviews.length - 1];
  if (!latest?.reviewed_at) return false;
  const age = Date.now() - new Date(latest.reviewed_at).getTime();
  if (age > 60000) return false;
  return edge.includes("gateway") && (edge.includes("observer") || edge.includes("vectord"));
}
function matchesNode(r, id) {
  if (!r?.file) return false;
  const f = r.file.toLowerCase();
  if (id === "gateway") return f.includes("/gateway/");
  if (id === "vectord") return f.includes("/vectord");
  if (id === "journal") return f.includes("/journald");
  if (id === "playbook")return f.includes("playbook_memory");
  if (id === "sidecar") return f.includes("sidecar");
  if (id === "agent")   return f.includes("agent.rs") || f.includes("autotune");
  return false;
}
function recentAvgConfidence(id) {
  const rs = state.reviews.filter(r => matchesNode(r, id));
  const vs = rs.map(r => r.confidence_avg).filter(v => v != null);
  return vs.length ? vs.reduce((a,b)=>a+b,0)/vs.length : null;
}
function recentGradientTier(id) {
  const rs = state.reviews.filter(r => matchesNode(r, id));
  const ts = rs.map(r => r.gradient_tier).filter(Boolean);
  return ts[ts.length - 1] ?? null;
}
function recentVerdict(id) {
  const rs = state.reviews.filter(r => matchesNode(r, id));
  const vs = rs.map(r => r.verdict).filter(Boolean);
  return vs[vs.length - 1] ?? null;
}

// ───── CONTEXT ─────
function renderContext() {
  const target = document.getElementById("ctx-target");
  const body = document.getElementById("ctx-body");
  clear(body);
  if (!state.selected) {
    target.textContent = "no selection";
    body.append(el("div", { className: "ctx-hint", text: "Click a node or a file in KB to inspect. Context persists across view switches." }));
    body.append(el("div", { className: "ctx-section-hd", text: "System totals" }));
    appendSummaryKV(body);
    return;
  }
  if (state.selected.type === "node") renderNodeContext(state.selected.id, target, body);
  else if (state.selected.type === "file") renderFileContext(state.selected.id, target, body);
}

function appendSummaryKV(body) {
  const s = state.services;
  if (!s) { body.append(el("div", { className: "ctx-hint", text: "loading…" })); return; }
  const get = id => s.nodes.concat(s.subsystems).find(n => n.id === id);
  const journal = get("journal")?.stats ?? {};
  const usage = get("usage")?.stats ?? {};
  const playbook = get("playbook")?.stats ?? {};
  const agent = get("agent")?.stats ?? {};
  const observer = get("observer")?.stats ?? {};
  body.append(row("scrum reviews", state.reviews.length));
  body.append(row("journal events", journal.total_events_created ?? 0));
  body.append(row("usage tokens", (usage.total_tokens ?? 0).toLocaleString()));
  body.append(row("playbook active", playbook.active ?? 0));
  body.append(row("autotune trials", agent.trials_run ?? 0));
  body.append(row("observer ops", observer.total ?? 0));
  body.append(row("findings (h/m/l)", `${countFindingsSev("high")}/${countFindingsSev("medium")}/${countFindingsSev("low")}`));
}

function countFindingsSev(sev) {
  let n = 0;
  for (const row of state.findings) for (const f of row.findings ?? []) if (f.severity === sev) n++;
  return n;
}

function renderNodeContext(id, target, body) {
  target.textContent = `NODE · ${id.toUpperCase()}`;
  const n = [...state.services.nodes, ...state.services.subsystems].find(x => x.id === id);
  if (n?.health) {
    body.append(el("div", { className: "ctx-section-hd", text: "Health" }));
    // Fix 2026-04-24: some /health endpoints return a plain string like
    // "lakehouse ok". Don't Object.entries() on strings — that iterates
    // characters. Detect primitive vs object explicitly.
    if (typeof n.health === "string" || typeof n.health === "number" || typeof n.health === "boolean") {
      body.append(row("response", String(n.health).slice(0, 80)));
    } else if (typeof n.health === "object" && n.health !== null) {
      Object.entries(n.health).slice(0, 8).forEach(([k,v]) => body.append(row(k, short(v))));
    }
  }
  if (n?.stats) {
    body.append(el("div", { className: "ctx-section-hd", text: "Stats" }));
    if (typeof n.stats === "string") {
      body.append(row("raw", String(n.stats).slice(0, 80)));
    } else if (typeof n.stats === "object" && n.stats !== null) {
      Object.entries(n.stats).slice(0, 10).forEach(([k,v]) => body.append(row(k, short(v))));
    }
  }
  const related = state.reviews.filter(r => matchesNode(r, id)).slice(-5).reverse();
  if (related.length) {
    body.append(el("div", { className: "ctx-section-hd", text: "Recent reviews" }));
    related.forEach(r => {
      const rr = row(r.file.split("/").pop(), `${r.confidence_avg ?? "-"}% · ${r.alignment_score ?? "?"}/10`);
      rr.style.cursor = "pointer";
      rr.addEventListener("click", () => { state.selected = { type:"file", id:r.file }; renderContext(); });
      body.append(rr);
    });
  }
  if (!body.firstChild) body.append(el("div", { className: "ctx-hint", text: "no data yet" }));
}

function renderFileContext(fpath, target, body) {
  target.textContent = fpath.split("/").slice(-3).join("/");
  const fileReviews = state.reviews.filter(r => r.file === fpath).slice(-6);
  if (!fileReviews.length) {
    body.append(el("div", { className: "ctx-hint", text: `no reviews for ${fpath}` }));
    return;
  }
  const latest = fileReviews[fileReviews.length - 1];
  const pillRow = el("div", { style: { paddingBottom: "6px" } });
  if (latest.gradient_tier) pillRow.append(el("span", { className: `pill tier-${latest.gradient_tier}`, text: latest.gradient_tier }));
  if (latest.verdict)       pillRow.append(el("span", { className: `pill ver-${latest.verdict}`, text: latest.verdict }));
  if (latest.output_format) pillRow.append(el("span", { className: `pill fmt-${latest.output_format}`, text: latest.output_format }));
  body.append(pillRow);
  const rows = [
    ["file", fpath],
    ["score", latest.alignment_score != null ? `${latest.alignment_score}/10` : "-"],
    ["conf avg", latest.confidence_avg != null ? `${latest.confidence_avg}%` : "-"],
    ["conf min", latest.confidence_min != null ? `${latest.confidence_min}%` : "-"],
    ["findings", latest.findings_count ?? 0],
    ["critical", latest.critical_failures_count ?? 0],
    ["verified", latest.verified_components_count ?? 0],
    ["missing", latest.missing_components_count ?? 0],
    ["model", latest.accepted_model ?? "-"],
    ["attempts", latest.attempts_made ?? 1],
    ["tree split", latest.tree_split_fired ? "yes" : "no"],
  ];
  rows.forEach(([k,v]) => body.append(row(k, short(v))));
  body.append(el("div", { className: "ctx-section-hd", text: "Score history" }));
  fileReviews.forEach(r => body.append(row(new Date(r.reviewed_at).toLocaleTimeString(), `${r.alignment_score ?? "?"}/10 · ${r.confidence_avg ?? "-"}%`)));
  body.append(el("div", { className: "ctx-section-hd", text: "Preview" }));
  const pre = el("pre", { text: latest.suggestions_preview ?? "", style: { whiteSpace: "pre-wrap", fontFamily: "var(--mono)", fontSize: "10px", color: "var(--fg-dim)", maxHeight: "200px", overflowY: "auto" } });
  body.append(pre);
  document.getElementById("stream-file").textContent = fpath.split("/").pop();
}

// ───── TRACE ─────
async function drawTrace() {
  const fpath = state.selected?.type === "file" ? state.selected.id : state.reviews[state.reviews.length-1]?.file;
  const tl = document.getElementById("trace-timeline");
  const detail = document.getElementById("trace-detail");
  clear(tl); clear(detail);
  document.getElementById("trace-file").textContent = fpath ?? "—";
  if (!fpath) { tl.append(el("div", { className: "ctx-hint", text: "no file selected — pick one in KB view" })); return; }
  const r = await fetch(`/data/file/${encodeURIComponent(fpath)}`).then(r => r.json());
  const history = r.history ?? [];
  document.getElementById("trace-runs").textContent = `${history.length} runs`;
  history.forEach((h, i) => {
    const node = el("div", { className: "trace-node" + (i === history.length - 1 ? " active" : "") });
    node.append(el("div", { className: "tn-run", text: h.run_id }));
    node.append(el("div", { className: "tn-score", text: h.score != null ? String(h.score) : "?" }));
    node.append(el("div", { className: "tn-conf", text: `conf ${h.conf_avg ?? "-"}% · ${h.findings}f` }));
    node.append(el("div", { className: "tn-model", text: (h.model ?? "").split("/").pop() }));
    node.addEventListener("click", () => {
      tl.querySelectorAll(".trace-node").forEach(x => x.classList.remove("active"));
      node.classList.add("active");
      clear(detail);
      detail.append(el("pre", { text: h.preview ?? "" }));
    });
    tl.append(node);
  });
  if (history.length) { clear(detail); detail.append(el("pre", { text: history[history.length-1].preview ?? "" })); }
}

// ───── TRAJECTORY — refactor signals + reverse index + per-file delta ─────

let trajectorySearchTimer = null;
document.getElementById("traj-search")?.addEventListener("input", (e) => {
  const q = e.target.value.trim();
  clearTimeout(trajectorySearchTimer);
  trajectorySearchTimer = setTimeout(() => runReverseIndex(q), 300);
});

async function runReverseIndex(query) {
  const body = document.getElementById("traj-body");
  if (!query) { drawTrajectory(); return; }
  clear(body);
  const res = await fetch(`/data/search?q=${encodeURIComponent(query)}`).then(r => r.json());
  const hdr = el("div", { className: "traj-section-head", text: `REVERSE INDEX · "${query}" · ${res.hits?.length ?? 0} hits` });
  body.append(hdr);
  (res.hits ?? []).forEach(h => {
    const card = el("div", { className: "traj-hit" });
    card.append(el("div", { className: "traj-hit-top" },
      el("span", { className: "traj-hit-file", text: h.file }),
      el("span", { className: "traj-hit-meta", text: `${h.run_id} · ${(h.model ?? "").split("/").pop()}` })
    ));
    card.append(el("div", { className: "traj-hit-snip", text: h.snippet }));
    card.addEventListener("click", () => {
      state.selected = { type: "file", id: `/home/profit/lakehouse/${h.file}` };
      renderContext();
      document.querySelector('#views button[data-view="trace"]').click();
    });
    body.append(card);
  });
}

async function drawTrajectory() {
  const body = document.getElementById("traj-body");
  clear(body);
  const statsEl = document.getElementById("traj-stats");
  clear(statsEl);

  // SECTION 1 — refactor signals
  const sig = await fetch("/data/refactor_signals").then(r => r.json());
  const sigs = sig.signals ?? [];
  const totalHits = sigs.reduce((a,s) => a + s.hits, 0);
  statsEl.textContent = `${sig.scanned ?? 0} files scanned · ${sigs.length} with refactor hints · ${totalHits} phrase hits total`;

  const sigHead = el("div", { className: "traj-section-head", text: "REFACTOR SIGNALS · files the scrum repeatedly flagged as dead / redundant / stub / needs-rewrite" });
  body.append(sigHead);

  const explain = el("div", { className: "traj-section-explain", text:
    "Aggregates across all scrum iterations. A phrase hit = one time the reviewer used language like 'remove', 'duplicate', 'refactor', 'pseudocode', 'orphaned'. " +
    "Files near the top are the strongest refactor candidates — the scrum keeps calling them out. Click a row to jump to its per-iteration trace."
  });
  body.append(explain);

  const table = el("div", { className: "traj-table" });
  sigs.slice(0, 30).forEach(s => {
    const r = el("div", { className: "traj-row" });
    r.append(el("div", { className: "traj-col-rank", text: String(sigs.indexOf(s) + 1) }));
    r.append(el("div", { className: "traj-col-file", text: s.file }));
    r.append(el("div", { className: "traj-col-hits", text: `${s.hits}×` }));
    const topPhrases = Object.entries(s.phrases).sort((a,b)=>b[1]-a[1]).slice(0,3)
      .map(([p,n]) => `${p} (${n})`).join(", ");
    r.append(el("div", { className: "traj-col-phrases", text: topPhrases }));
    r.append(el("div", { className: "traj-col-iters", text: `${s.iterations} iter` }));
    r.addEventListener("click", () => {
      state.selected = { type: "file", id: `/home/profit/lakehouse/${s.file}` };
      renderContext();
      document.querySelector('#views button[data-view="trace"]').click();
    });
    table.append(r);
  });
  body.append(table);

  // SECTION 2 — per-file trajectory: pick the top-5 refactor candidates and
  // show their score/conf delta across iterations inline.
  if (sigs.length) {
    body.append(el("div", { className: "traj-section-head", text: "SCORE TRAJECTORY — top refactor candidates" }));
    const grid = el("div", { className: "traj-spark-grid" });
    for (const s of sigs.slice(0, 6)) {
      const card = el("div", { className: "traj-spark" });
      card.append(el("div", { className: "traj-spark-file", text: s.file }));
      // pull history
      const hist = await fetch(`/data/file/${encodeURIComponent("/home/profit/lakehouse/" + s.file)}`)
        .then(r => r.json()).catch(() => ({ history: [] }));
      const runs = hist.history ?? [];
      if (runs.length === 0) { card.append(el("div", { className: "traj-spark-empty", text: "no history" })); }
      else {
        const line = el("div", { className: "traj-spark-line" });
        runs.forEach((h,i) => {
          const pt = el("div", { className: "traj-spark-pt" });
          pt.append(el("div", { className: "traj-pt-score", text: h.score != null ? `${h.score}/10` : "?" }));
          pt.append(el("div", { className: "traj-pt-conf", text: `${h.conf_avg ?? "-"}%` }));
          pt.append(el("div", { className: "traj-pt-label", text: `iter${i+1}` }));
          line.append(pt);
          if (i < runs.length - 1) line.append(el("div", { className: "traj-spark-arrow", text: "→" }));
        });
        card.append(line);
        // delta summary
        if (runs.length >= 2) {
          const first = runs[0], last = runs[runs.length - 1];
          const dScore = (last.score != null && first.score != null) ? (last.score - first.score) : null;
          const dConf = (last.conf_avg != null && first.conf_avg != null) ? (last.conf_avg - first.conf_avg) : null;
          const delta = el("div", { className: "traj-spark-delta" });
          if (dScore != null) delta.append(el("span", { text: `Δscore ${dScore > 0 ? "+" : ""}${dScore.toFixed(1)}`, className: dScore < 0 ? "delta-down" : dScore > 0 ? "delta-up" : "" }));
          if (dConf != null) delta.append(el("span", { text: ` · Δconf ${dConf > 0 ? "+" : ""}${dConf}%`, className: dConf > 0 ? "delta-up" : dConf < 0 ? "delta-down" : "" }));
          card.append(delta);
        }
      }
      card.addEventListener("click", () => {
        state.selected = { type: "file", id: `/home/profit/lakehouse/${s.file}` };
        renderContext();
        document.querySelector('#views button[data-view="trace"]').click();
      });
      grid.append(card);
    }
    body.append(grid);
  }
}

// ───── METRICS ─────
function metricBox(label, big, kind, opts = {}) {
  // opts: { source, good, explain }
  // source = where the number comes from (data path)
  // good   = the "what's a healthy value" sentence
  // explain = one-line definition of what this counts
  const box = el("div", { className: "metric" + (kind ? " " + kind : "") });
  box.append(el("div", { className: "m-label", text: label }));
  box.append(el("div", { className: "m-big", text: big }));
  if (opts.explain) box.append(el("div", { className: "m-sub m-explain", text: opts.explain }));
  if (opts.source)  box.append(el("div", { className: "m-sub m-source", text: "SOURCE · " + opts.source }));
  if (opts.good)    box.append(el("div", { className: "m-sub m-good",   text: "GOOD · " + opts.good }));
  return box;
}
function drawMetrics() {
  const grid = document.getElementById("metric-grid");
  clear(grid);
  const byTier = { auto:0, dry_run:0, simulation:0, block:0, unknown:0 };
  state.reviews.forEach(r => { const t = r.gradient_tier ?? "unknown"; if (byTier[t] != null) byTier[t]++; });
  const total = state.reviews.length || 1;
  const confRows = state.reviews.filter(r => r.confidence_avg != null);
  const avg = confRows.length ? Math.round(confRows.reduce((a,r)=>a+r.confidence_avg,0)/confRows.length) : 0;
  const verdictCount = { pass:0, needs_patch:0, fail:0, unknown:0 };
  state.reviews.forEach(r => { const v=r.verdict??"unknown"; if(verdictCount[v]!=null) verdictCount[v]++; });
  const findingsTotal = state.reviews.reduce((a,r)=>a+(r.findings_count??0),0);
  const critTotal = state.reviews.reduce((a,r)=>a+(r.critical_failures_count??0),0);
  const verTotal = state.reviews.reduce((a,r)=>a+(r.verified_components_count??0),0);
  const usage = state.services?.subsystems?.find(n=>n.id==="usage")?.stats ?? {};
  const journal = state.services?.subsystems?.find(n=>n.id==="journal")?.stats ?? {};

  grid.append(metricBox("avg confidence", `${avg}%`, avg>=85?"good":avg>=70?"warn":"bad", {
    explain: "Self-assessed probability per suggestion, averaged across every review.",
    source: "scrum_reviews.jsonl .confidence_avg",
    good: "≥85% — model is confident. 70-84% routine. <70% means the scrum is uncertain and findings need human review.",
  }));
  grid.append(metricBox("scrum reviews", String(state.reviews.length), "good", {
    explain: "Every source file reviewed by the scrum master, across all iterations.",
    source: `${state.metrics.length} scrum runs tracked in scrum_loop_metrics.jsonl`,
    good: "Grows every run — 21 files × N iterations. Stall = pipeline broken.",
  }));
  grid.append(metricBox("critical failures", String(critTotal), critTotal>50?"bad":critTotal>10?"warn":"good", {
    explain: "Hard FAILs flagged by the forensic reviewer — pseudocode, fake implementations, unwired invariants. Each one is a concrete code-level gap.",
    source: "scrum_reviews.jsonl .critical_failures_count (forensic JSON format only)",
    good: "Trending DOWN each iteration = fixes are landing. Rising = new gaps surfacing faster than we close them.",
  }));
  grid.append(metricBox("verified components", String(verTotal), verTotal>0?"good":"warn", {
    explain: "What the scrum CONFIRMED is working — with file/line evidence. The inverse of critical_failures.",
    source: "scrum_reviews.jsonl .verified_components_count",
    good: "Trending UP = the system has more provably-real parts over time. Should grow as fixes land.",
  }));
  grid.append(metricBox("findings captured", String(findingsTotal), "good", {
    explain: "Total individual suggestions the scrum produced across all reviews (tables + JSON).",
    source: "scrum_reviews.jsonl .findings_count summed",
    good: "Higher = more scrutiny per file. Per-file average ≥10 means the review is substantive.",
  }));
  grid.append(metricBox("journal events", String(journal.total_events_created ?? 0), "good", {
    explain: "Mutation events recorded via ADR-012 append-only journal. Every ingest/delta-write should emit one.",
    source: "/journal/stats → total_events_created",
    good: "Should grow with ingest traffic. 1 = only a test probe fired; internal callers still unwired on most paths (P9-001).",
  }));
  grid.append(metricBox("v1 requests", String(usage.requests ?? 0), "good", {
    explain: "Calls through the Universal API /v1/chat endpoint (Phase 38). Captures all scrum + audit traffic.",
    source: `/v1/usage → requests. ${(usage.total_tokens ?? 0).toLocaleString()} tokens total`,
    good: "Every iteration adds ~21 requests. Stall = scrum paused OR callers bypassing the gateway (P44-style bypass).",
  }));

  // gradient bar
  const gb = el("div", { className: "metric" });
  gb.append(el("div", { className: "m-label", text: "permission gradient" }));
  gb.append(el("div", { className: "m-big", text: String(state.reviews.length) }));
  gb.append(el("div", { className: "m-sub m-explain", text: "Tiers the scrum's suggestions by confidence: how much auto-apply we can trust per file." }));
  const bar = el("div", { className: "bar" });
  bar.append(el("span", { className: "seg-auto",       style: { width: `${100*byTier.auto/total}%` } }));
  bar.append(el("span", { className: "seg-dry_run",    style: { width: `${100*byTier.dry_run/total}%` } }));
  bar.append(el("span", { className: "seg-simulation", style: { width: `${100*byTier.simulation/total}%` } }));
  bar.append(el("span", { className: "seg-block",      style: { width: `${100*byTier.block/total}%` } }));
  gb.append(bar);
  gb.append(el("div", { className: "m-sub", text: `auto ${byTier.auto} · dry_run ${byTier.dry_run} · sim ${byTier.simulation} · block ${byTier.block}` }));
  gb.append(el("div", { className: "m-sub m-good", text:
    "AUTO (≥90%): ship the suggestion. DRY_RUN (70-89): apply then diff. SIMULATION (50-69): test first. BLOCK (<50): human review — the model doesn't trust itself."
  }));
  grid.append(gb);

  const vb = el("div", { className: "metric" });
  vb.append(el("div", { className: "m-label", text: "verdict distribution" }));
  vb.append(el("div", { className: "m-big", text: String(verdictCount.pass + verdictCount.needs_patch + verdictCount.fail) }));
  vb.append(el("div", { className: "m-sub m-explain", text: "Forensic audit verdict per file: pass = works, needs_patch = fixable gaps, fail = not trustable." }));
  vb.append(el("div", { className: "m-sub", text: `pass ${verdictCount.pass} · needs_patch ${verdictCount.needs_patch} · fail ${verdictCount.fail}` }));
  vb.append(el("div", { className: "m-sub m-source", text: "SOURCE · scrum_reviews.jsonl .verdict (forensic JSON only — markdown rows count as unknown)" }));
  grid.append(vb);
}

// ───── KB ─────
function drawKB() {
  const grid = document.getElementById("kb-grid");
  clear(grid);

  // Explanatory banner — each iteration the scrum re-reviews every
  // target file and writes a row here. A card = one file's latest
  // review. Click to drill into its trace across all iterations.
  const banner = el("div", { className: "kb-banner" });
  banner.append(el("div", { className: "kb-banner-title", text: "KNOWLEDGE BASE — every source file reviewed by the scrum master" }));
  banner.append(el("div", { className: "kb-banner-body", text:
    "Each card below is the LATEST scrum review of one source file. The review itself lives in data/_kb/scrum_reviews.jsonl. " +
    "Fields: score (scrum's alignment rating, 1-10 vs PRD intent), conf (model's self-assessed confidence per suggestion, avg'd), " +
    "findings (# of suggestions), crit (critical_failures — hard FAILs found), verified (verified_components — what's confirmed working). " +
    "Pills show: permission gradient (can we trust auto-apply), verdict (pass/needs_patch/fail), output format (JSON = forensic, markdown = legacy). " +
    "Click a card to see its trace across all iterations (iter 1 → iter N) and watch scores trend."
  }));
  grid.append(banner);

  const byFile = new Map();
  state.reviews.forEach(r => { if (r.file) byFile.set(r.file, r); });
  const rows = [...byFile.values()].sort((a,b) => (b.confidence_avg??0) - (a.confidence_avg??0));

  // Quick stats above the cards
  const statLine = el("div", { className: "kb-statline" });
  const avgConf = rows.length ? Math.round(rows.reduce((a,r)=>a+(r.confidence_avg??0),0) / rows.length) : 0;
  const scoreMean = rows.filter(r=>r.alignment_score!=null);
  const avgScore = scoreMean.length ? (scoreMean.reduce((a,r)=>a+r.alignment_score,0) / scoreMean.length).toFixed(1) : "?";
  const blockCount = rows.filter(r => r.gradient_tier === "block").length;
  statLine.append(el("span", { text: `${rows.length} files tracked` }));
  statLine.append(el("span", { text: `mean score ${avgScore}/10` }));
  statLine.append(el("span", { text: `mean confidence ${avgConf}%` }));
  statLine.append(el("span", { text: `${blockCount} blocked (need human review)`, className: blockCount > 0 ? "stat-warn" : "" }));
  grid.append(statLine);

  rows.forEach(r => {
    const card = el("div", { className: "kb-file", data: { file: r.file } });
    card.append(el("div", { className: "kf-path", text: r.file }));
    const meta = el("div", { className: "kf-meta" });
    const scoreSpan = el("span", { className: "kf-score", text: `${r.alignment_score ?? "?"}/10` });
    scoreSpan.title = "Scrum's alignment score (1-10) — how well this file matches PRD intent. Lower = more gaps.";
    meta.append(scoreSpan);
    const confSpan = el("span", { text: `conf ${r.confidence_avg ?? "-"}%` });
    confSpan.title = "Average self-confidence across suggestions. <70% = model uncertain, treat carefully.";
    meta.append(confSpan);
    const findingsSpan = el("span", { text: `${r.findings_count ?? 0} findings` });
    findingsSpan.title = "Total suggestions in this review (table rows or JSON array entries).";
    meta.append(findingsSpan);
    const critSpan = el("span", { text: `${r.critical_failures_count ?? 0} crit` });
    critSpan.title = "Critical failures: pseudocode, fake implementations, unwired invariants. Hard FAILs.";
    if ((r.critical_failures_count ?? 0) > 0) critSpan.style.color = "var(--red)";
    meta.append(critSpan);
    const verSpan = el("span", { text: `${r.verified_components_count ?? 0} verified` });
    verSpan.title = "Verified components: things the scrum CONFIRMED work, with file/line evidence.";
    if ((r.verified_components_count ?? 0) > 0) verSpan.style.color = "var(--green)";
    meta.append(verSpan);
    meta.append(el("span", { text: (r.accepted_model ?? "").split("/").pop(), attrs: { title: "Which model produced this review" } }));
    card.append(meta);
    const pills = el("div", { className: "kf-meta" });
    if (r.gradient_tier) {
      const p = el("span", { className: `pill tier-${r.gradient_tier}`, text: r.gradient_tier });
      p.title = ({
        auto: "AUTO — confidence ≥90%, suggestions safe to apply automatically",
        dry_run: "DRY_RUN — confidence 70-89%, apply then review the diff",
        simulation: "SIMULATION — confidence 50-69%, test in sandbox first",
        block: "BLOCK — confidence <50%, requires human review, do not auto-apply",
      })[r.gradient_tier] ?? r.gradient_tier;
      pills.append(p);
    }
    if (r.verdict) {
      const p = el("span", { className: `pill ver-${r.verdict}`, text: r.verdict });
      p.title = ({
        pass: "PASS — scrum confirms this file meets its PRD intent",
        needs_patch: "NEEDS_PATCH — gaps exist but are fixable; scrum has concrete suggestions",
        fail: "FAIL — file cannot be trusted for its claimed purpose without structural changes",
      })[r.verdict] ?? r.verdict;
      pills.append(p);
    }
    if (r.output_format) {
      const p = el("span", { className: `pill fmt-${r.output_format}`, text: r.output_format });
      p.title = r.output_format === "forensic_json"
        ? "FORENSIC_JSON — structured output with verdict/critical/verified/missing fields. Richer signal."
        : "MARKDOWN — legacy tabular output. Lower structure; we only extract confidence scalars from these.";
      pills.append(p);
    }
    card.append(pills);
    card.addEventListener("click", () => {
      state.selected = { type: "file", id: r.file };
      renderContext();
      document.querySelector('#views button[data-view="trace"]').click();
    });
    grid.append(card);
  });
}

// ───── CONSOLE ─────
// Persistent selection across polls so tab switches survive.
state.consoleSvc = "gateway";

// Hook tab buttons once
document.querySelectorAll("#con-tabs button").forEach(b => {
  b.addEventListener("click", () => {
    document.querySelectorAll("#con-tabs button").forEach(x => x.classList.remove("on"));
    b.classList.add("on");
    state.consoleSvc = b.dataset.svc;
    drawConsole();
  });
});

async function drawConsole() {
  const log = document.getElementById("console-log");
  clear(log);
  const unit = document.getElementById("con-unit");
  if (unit) unit.textContent = "";

  if (state.consoleSvc === "summary") {
    drawConsoleSummary(log);
    return;
  }

  // Per-service log tail
  const svc = state.consoleSvc;
  try {
    const res = await fetch(`/data/logs/${svc}?n=120`).then(r => r.json());
    if (unit && res.unit) unit.textContent = `unit · ${res.unit}`;
    if (res.error) {
      log.append(lineInfo(`[error] ${res.error}`, "cl-err"));
      return;
    }
    const lines = res.lines ?? [];
    if (!lines.length) { log.append(lineInfo("(no log lines — unit may have just started)", "cl-info")); return; }
    lines.forEach(l => {
      const cls = /\berror\b|\bERROR\b|panic|\[ERROR|failed/.test(l) ? "cl-err"
        : /\bwarn\b|\bWARN\b|\bwarning\b|\[WARN/.test(l) ? "cl-warn"
        : /\baccepted\b|\bok\b|\bOK\b|success|complete|ready/.test(l) ? "cl-ok"
        : "cl-info";
      log.append(lineInfo(l, cls));
    });
    // autoscroll to bottom
    log.scrollTop = log.scrollHeight;
  } catch (e) {
    log.append(lineInfo(`[fetch-error] ${e}`, "cl-err"));
  }
}

function lineInfo(text, cls) {
  return el("div", { className: "cl-line " + cls, text });
}

function drawConsoleSummary(log) {
  const info = t => lineInfo(t, "cl-info");
  const ok   = t => lineInfo(t, "cl-ok");
  const warn = t => lineInfo(t, "cl-warn");
  const err  = t => lineInfo(t, "cl-err");
  log.append(info(`# Lakehouse VCP · ${new Date().toLocaleTimeString()}`));
  log.append(info(`# Services`));
  for (const n of state.services?.nodes ?? []) {
    const line = `[${String(n.status).padEnd(8)}] ${n.label}`;
    log.append(n.status === "healthy" ? ok(line) : n.status === "down" ? err(line) : warn(line));
  }
  log.append(info(`# Subsystems`));
  for (const s of state.services?.subsystems ?? []) {
    log.append(info(`  ${String(s.id).padEnd(10)} ${JSON.stringify(s.stats ?? {}).slice(0, 120)}`));
  }
  log.append(info(`# Recent overrides (layer 10)`));
  for (const o of state.overrides.slice(-6)) {
    log.append(warn(`  [${o.ts}] ${o.task_signature}: ${o.human_fix}`));
  }
  log.append(info(`# Model trust accumulated`));
  const agg = {};
  for (const t of state.trust) {
    const k = t.accepted_model ?? "?";
    agg[k] = agg[k] ?? { accepts:0, thin:0, attempts:0 };
    agg[k].accepts++;
    agg[k].thin += t.thin_rejections ?? 0;
    agg[k].attempts += t.attempts_made ?? 0;
  }
  for (const [m, s] of Object.entries(agg)) {
    log.append(info(`  ${String(m).padEnd(48)} accepts=${s.accepts} thin=${s.thin} attempts=${s.attempts}`));
  }
}

// ───── boot ─────
poll();
setInterval(poll, POLL_MS);
window.addEventListener("resize", () => { if (state.services && state.view === "map") drawMap(state.services); });