// SPEC: PJ2026-01060508 Web哨兵 draft-2026-06-26-p7-web-probe-sentinel-dashboard.
// Responsibility: Browser-side API client, formatting, auto refresh, and base dashboard rendering.

/**
 * @typedef {{runId?: string|null, observerId?: string|null, stateDir?: string|null, reportJsonSha256?: string|null}} Traceability
 * @typedef {{id?: string|null, runId?: string|null, scenarioId?: string|null, status?: string|null, observerId?: string|null, stateDir?: string|null, reportJsonSha256?: string|null, findingCount?: number, artifactCount?: number, updatedAt?: string|null, maxSeverity?: string|null, traceability?: Traceability}} SentinelRun
 * @typedef {{ok: boolean, status?: string, node?: string, lane?: string, publicOrigin?: string|null, latestRun?: SentinelRun|null, runCounts?: Record<string, number>, severityCounts?: Record<string, number>, freshness?: Record<string, unknown>, targetValidation?: {maxSeconds?: number, scenarioId?: string|null}, valuesRedacted?: boolean}} SentinelOverview
 * @typedef {{groups?: Array<{code?: string|null, findingId?: string|null, severity?: string|null, scenarioId?: string|null, count?: number, runCount?: number, latestAt?: string|null, latestRunId?: string|null, summary?: string|null}>}} SentinelFindingsResponse
 * @typedef {{items?: SentinelRun[], runs?: SentinelRun[], page?: {limit?: number, nextCursor?: string|null, hasMore?: boolean}}} SentinelRunsResponse
 */

const root = document.getElementById("sentinel-dashboard");
const refs = {
  statusPill: document.getElementById("status-pill"),
  loadingBanner: document.getElementById("loading-banner"),
  errorBanner: document.getElementById("error-banner"),
  manualRefresh: document.getElementById("manual-refresh"),
  autoRefreshEnabled: document.getElementById("auto-refresh-enabled"),
  autoRefreshInterval: document.getElementById("auto-refresh-interval"),
  overall: document.getElementById("metric-overall"),
  origin: document.getElementById("metric-origin"),
  latestRun: document.getElementById("metric-latest-run"),
  latestAge: document.getElementById("metric-latest-age"),
  findings: document.getElementById("metric-findings"),
  findingsNote: document.getElementById("metric-findings-note"),
  scheduler: document.getElementById("metric-scheduler"),
  budget: document.getElementById("metric-budget"),
  runsBody: document.getElementById("runs-body"),
  runsCount: document.getElementById("runs-count"),
  findingsList: document.getElementById("findings-list"),
  findingsCount: document.getElementById("findings-count"),
  detailSubtitle: document.getElementById("detail-subtitle"),
  detailContent: document.getElementById("detail-content"),
};

const state = {
  loading: false,
  selectedRunId: null,
  /** @type {SentinelOverview|null} */
  overview: null,
  /** @type {SentinelRun[]} */
  runs: [],
  findings: [],
  runDetail: null,
  lastUpdatedAt: null,
};

const dashboardApi = createDashboardApi();
const autoRefresh = createAutoRefresh({
  storageKey: "hwlab.webProbeSentinel.dashboard.autoRefresh",
  intervals: [5, 10, 30],
  defaultInterval: 10,
  onRefresh: () => loadDashboard({ silent: true }),
  shouldPause: () => document.hidden || state.loading,
});

refs.manualRefresh.addEventListener("click", () => loadDashboard({ silent: false }));
refs.autoRefreshEnabled.addEventListener("change", () => autoRefresh.setEnabled(refs.autoRefreshEnabled.checked));
refs.autoRefreshInterval.addEventListener("change", () => autoRefresh.setInterval(Number(refs.autoRefreshInterval.value)));
document.addEventListener("visibilitychange", () => {
  if (!document.hidden && autoRefresh.enabled()) loadDashboard({ silent: true });
});

hydrateControls();
loadDashboard({ silent: false }).catch((error) => renderError(error));

function createDashboardApi() {
  return {
    /** @returns {Promise<SentinelOverview>} */
    overview: () => getJson("/api/overview"),
    /** @returns {Promise<SentinelRunsResponse>} */
    runs: () => getJson("/api/runs?limit=20&sort=updated&direction=desc"),
    /** @returns {Promise<SentinelFindingsResponse>} */
    findings: () => getJson("/api/findings?limit=20&window=24h"),
    runDetail: (runId) => getJson(`/api/runs/${encodeURIComponent(runId)}`),
  };
}

async function getJson(path) {
  const response = await fetch(path, { headers: { accept: "application/json" } });
  const body = await response.json().catch(() => ({}));
  if (!response.ok || body.ok === false) {
    const message = body.error || `${response.status} ${response.statusText}`;
    throw new Error(message);
  }
  return body;
}

function createAutoRefresh(options) {
  let enabled = false;
  let intervalSeconds = options.defaultInterval;
  let countdown = intervalSeconds;
  let timer = null;

  try {
    const saved = JSON.parse(localStorage.getItem(options.storageKey) || "{}");
    if (saved.enabled === true) enabled = true;
    if (options.intervals.includes(Number(saved.intervalSeconds))) intervalSeconds = Number(saved.intervalSeconds);
  } catch {
    enabled = false;
  }

  function persist() {
    try {
      localStorage.setItem(options.storageKey, JSON.stringify({ enabled, intervalSeconds }));
    } catch {
      /* ignore */
    }
  }

  async function tick() {
    if (!enabled || options.shouldPause()) return;
    if (countdown > 0) {
      countdown -= 1;
      return;
    }
    countdown = intervalSeconds;
    await options.onRefresh();
  }

  function start() {
    if (timer !== null) return;
    timer = window.setInterval(tick, 1000);
  }

  function stop() {
    if (timer === null) return;
    window.clearInterval(timer);
    timer = null;
  }

  return {
    enabled: () => enabled,
    intervalSeconds: () => intervalSeconds,
    setEnabled(value) {
      enabled = value;
      countdown = intervalSeconds;
      persist();
      if (enabled) start();
      else stop();
    },
    setInterval(value) {
      if (!options.intervals.includes(value)) return;
      intervalSeconds = value;
      countdown = value;
      persist();
    },
    start,
  };
}

function hydrateControls() {
  refs.autoRefreshEnabled.checked = autoRefresh.enabled();
  refs.autoRefreshInterval.value = String(autoRefresh.intervalSeconds());
  if (autoRefresh.enabled()) autoRefresh.start();
}

async function loadDashboard(options) {
  if (state.loading) return;
  state.loading = true;
  renderLoading(!options.silent);
  try {
    const [overview, runs, findings] = await Promise.all([
      dashboardApi.overview(),
      dashboardApi.runs(),
      dashboardApi.findings(),
    ]);
    state.overview = overview;
    state.runs = Array.isArray(runs.items) ? runs.items : Array.isArray(runs.runs) ? runs.runs : [];
    state.findings = Array.isArray(findings.groups) ? findings.groups : [];
    state.lastUpdatedAt = new Date();
    if (state.selectedRunId && !state.runs.some((run) => run.runId === state.selectedRunId || run.id === state.selectedRunId)) {
      state.selectedRunId = null;
      state.runDetail = null;
    }
    renderDashboard();
  } catch (error) {
    renderError(error);
  } finally {
    state.loading = false;
    renderLoading(false);
  }
}

async function selectRun(runId) {
  if (!runId) return;
  state.selectedRunId = runId;
  refs.detailSubtitle.textContent = runId;
  refs.detailContent.innerHTML = '<div class="empty-state">Loading</div>';
  try {
    state.runDetail = await dashboardApi.runDetail(runId);
    renderDetail();
  } catch (error) {
    refs.detailContent.innerHTML = `<div class="empty-state">${escapeHtml(error.message || String(error))}</div>`;
  }
}

function renderDashboard() {
  refs.errorBanner.hidden = true;
  renderOverview();
  renderRuns();
  renderFindings();
  renderDetail();
}

function renderOverview() {
  const overview = state.overview || {};
  const status = overview.status || (overview.ok ? "healthy" : "degraded");
  refs.statusPill.textContent = status;
  refs.statusPill.className = `status-pill ${statusClass(status)}`;
  refs.overall.textContent = status;
  refs.origin.textContent = overview.publicOrigin || root.dataset.publicOrigin || "-";

  const latest = overview.latestRun || null;
  refs.latestRun.textContent = latest?.runId || latest?.id || "-";
  refs.latestAge.textContent = latest?.updatedAt ? `${formatRelative(latest.updatedAt)} updated` : "-";

  const severityCounts = overview.severityCounts || {};
  const totalFindings = Object.values(severityCounts).reduce((sum, value) => sum + Number(value || 0), 0);
  refs.findings.textContent = formatNumber(totalFindings);
  refs.findingsNote.textContent = formatSeveritySummary(severityCounts);

  const scheduler = overview.scheduler || {};
  const heartbeat = scheduler.heartbeat || {};
  refs.scheduler.textContent = heartbeat.at ? formatRelative(heartbeat.at) : "unknown";
  const maxSeconds = overview.targetValidation?.maxSeconds ?? 120;
  refs.budget.textContent = `targetValidation ${maxSeconds}s`;
}

function renderRuns() {
  refs.runsCount.textContent = `${state.runs.length} visible`;
  if (state.runs.length === 0) {
    refs.runsBody.innerHTML = '<tr><td class="empty-state" colspan="5">No runs</td></tr>';
    return;
  }
  refs.runsBody.innerHTML = state.runs.map((run) => {
    const runId = run.runId || run.id || "-";
    return `<tr data-run-id="${escapeAttr(runId)}">
      <td><div class="mono">${escapeHtml(runId)}</div><small>${escapeHtml(run.observerId || "-")}</small></td>
      <td><span class="status-pill ${statusClass(run.status)}">${escapeHtml(run.status || "-")}</span></td>
      <td>${escapeHtml(run.scenarioId || "-")}</td>
      <td>${escapeHtml(String(run.findingCount ?? 0))}${run.maxSeverity ? ` <span class="severity-pill ${severityClass(run.maxSeverity)}">${escapeHtml(run.maxSeverity)}</span>` : ""}</td>
      <td>${escapeHtml(run.updatedAt ? formatRelative(run.updatedAt) : "-")}</td>
    </tr>`;
  }).join("");
  for (const row of refs.runsBody.querySelectorAll("tr[data-run-id]")) {
    row.addEventListener("click", () => selectRun(row.dataset.runId));
  }
}

function renderFindings() {
  refs.findingsCount.textContent = `${state.findings.length} groups`;
  if (state.findings.length === 0) {
    refs.findingsList.innerHTML = '<div class="empty-state">No findings</div>';
    return;
  }
  refs.findingsList.innerHTML = state.findings.map((item) => {
    const code = item.code || item.findingId || "finding";
    const latestRunId = item.latestRunId || "-";
    return `<article class="finding-item">
      <div class="finding-row">
        <span class="finding-title">${escapeHtml(code)}</span>
        <span class="severity-pill ${severityClass(item.severity)}">${escapeHtml(item.severity || "unknown")}</span>
      </div>
      <div class="finding-meta">${escapeHtml(item.scenarioId || "-")} · count=${escapeHtml(String(item.count ?? 0))} · runs=${escapeHtml(String(item.runCount ?? 0))}</div>
      <div class="finding-meta mono">${escapeHtml(latestRunId)}</div>
      <div class="finding-meta">${escapeHtml(item.summary || "")}</div>
    </article>`;
  }).join("");
}

function renderDetail() {
  if (!state.selectedRunId || !state.runDetail) {
    refs.detailSubtitle.textContent = "No run selected";
    refs.detailContent.innerHTML = '<div class="empty-state">Select a run</div>';
    return;
  }
  const detail = state.runDetail;
  const run = detail.run || {};
  refs.detailSubtitle.textContent = run.runId || state.selectedRunId;
  refs.detailContent.innerHTML = [
    detailBlock("Traceability", [
      ["run", run.runId || "-"],
      ["observer", run.observerId || "-"],
      ["stateDir", run.stateDir || "-"],
      ["report", run.reportJsonSha256 || "-"],
    ]),
    detailBlock("Summary", [
      ["status", run.status || "-"],
      ["scenario", run.scenarioId || "-"],
      ["findings", String(run.findingCount ?? 0)],
      ["artifacts", String(run.artifactCount ?? 0)],
    ]),
    detailBlock("Commands", [
      ["summary", detail.commands?.summary || "-"],
      ["trace", detail.commands?.traceFrame || "-"],
    ]),
    detailBlock("Redaction", [
      ["values", detail.valuesRedacted === true ? "redacted" : "-"],
      ["prompt", detail.redaction?.prompt || "-"],
      ["assistant", detail.redaction?.assistantFinal || "-"],
    ]),
  ].join("");
}

function detailBlock(title, rows) {
  return `<article class="detail-block"><strong>${escapeHtml(title)}</strong><div class="detail-grid">${
    rows.map(([key, value]) => `<div><span>${escapeHtml(key)}:</span> <span class="mono">${escapeHtml(value)}</span></div>`).join("")
  }</div></article>`;
}

function renderLoading(show) {
  refs.loadingBanner.hidden = !show;
  refs.manualRefresh.disabled = state.loading;
}

function renderError(error) {
  refs.errorBanner.hidden = false;
  refs.errorBanner.textContent = error?.message || String(error);
}

function statusClass(value) {
  const normalized = String(value || "idle").toLowerCase();
  if (["healthy", "observed", "analyzed", "pass", "ok"].includes(normalized)) return "status-healthy";
  if (["warning", "degraded", "planned", "running", "queued"].includes(normalized)) return "status-warning";
  if (["blocked", "failed", "error", "timeout", "interrupted"].includes(normalized)) return "status-blocked";
  return "status-idle";
}

function severityClass(value) {
  const normalized = String(value || "unknown").toLowerCase();
  if (["red", "critical", "error"].includes(normalized)) return `severity-${normalized}`;
  if (["warning", "amber"].includes(normalized)) return `severity-${normalized}`;
  if (["info"].includes(normalized)) return "severity-info";
  return "severity-unknown";
}

function formatSeveritySummary(counts) {
  const entries = Object.entries(counts || {}).filter(([, value]) => Number(value || 0) > 0);
  if (entries.length === 0) return "none";
  return entries.map(([key, value]) => `${key} ${formatNumber(Number(value || 0))}`).join(" · ");
}

function formatNumber(value) {
  return new Intl.NumberFormat("en-US").format(Number(value || 0));
}

function formatRelative(iso) {
  const ms = Date.parse(String(iso || ""));
  if (!Number.isFinite(ms)) return "-";
  const seconds = Math.max(0, Math.floor((Date.now() - ms) / 1000));
  if (seconds < 60) return `${seconds}s ago`;
  const minutes = Math.floor(seconds / 60);
  if (minutes < 60) return `${minutes}m ago`;
  const hours = Math.floor(minutes / 60);
  if (hours < 24) return `${hours}h ago`;
  return `${Math.floor(hours / 24)}d ago`;
}

function escapeHtml(value) {
  return String(value ?? "")
    .replace(/&/gu, "&amp;")
    .replace(/</gu, "&lt;")
    .replace(/>/gu, "&gt;")
    .replace(/"/gu, "&quot;")
    .replace(/'/gu, "&#39;");
}

function escapeAttr(value) {
  return escapeHtml(value);
}