// /dashboard.html entry point: tab renderers + tab routing + refreshState.
// Reads /api/state on cold load and after every async-form submit; live
// updates run through `applyXxx` mutation handlers triggered by the
// dashboard event stream (subscribed via `openStream` from common.js). See
// docs/web-ui/shape.md::Shape (shared by both) for the broader contract.
//
// Pure helpers (DOM, side panel, path linkification)
// live in `./common.js`; the flow-page surface (broker
// terminal, @-mention composer) lives in `./flow.js` — `flow.html` and
// `dashboard.html` each load their own bundle.
// SW4RM (containers) domain lives in `./swarm.js`.

import { marked } from "marked";
import { $, openStream, renderServerWarnings } from "./common.js";
import { el } from "@hive/shared/dom.js";
import { bindAsyncForms } from "@hive/shared/forms.js";
import { createTabStrip } from "@hive/shared/tabs.js";
import { containersState, syncContainersFromSnapshot } from "./state.js";
import {
  applyCapabilitiesChanged,
  applyToolGroupsChanged,
  fetchAndRenderCapabilities,
  fetchAndRenderToolGroups,
  initPermissions,
} from "./permissions.js";
import {
  initJobqRollup,
  syncTransientsFromSnapshot,
  applyRebuildQueueChanged,
  applyContainerStateChanged,
  applyContainerRemoved,
  applyTransientSet,
  applyTransientCleared,
  renderContainers,
  renderSelectionBar,
} from "./swarm.js";

// mdNode (in common.js) reads `window.marked` for the markdown side
// panel preview path. Set it here on the dashboard entry so file
// previews work; flow.js does the same for the flow-page entry.
window.marked = marked;

(() => {
  // ─── async forms ────────────────────────────────────────────────────────
  // Shared `data-async` submit interceptor (now in common.js so /core.html's
  // bundle gets it too). On success it re-runs refreshState unless the form
  // opts out via `data-no-refresh` (its mutation arrives via an SSE event).
  bindAsyncForms(() => refreshState());

  // ─── state polling ──────────────────────────────────────────────────────
  let pollTimer = null;
  // Sections whose innerHTML gets blown away on each refresh. If the
  // operator is typing in one of them, skip the refresh — the next
  // tick (or a manual action) will pick it up after they blur.
  const MANAGED_SECTION_IDS = [
    "containers-section",
    "inbox-section",
    "capabilities-section",
    "tool-groups-section",
  ];
  // <details> sections that should survive a refresh need a stable
  // `data-restore-key` attribute. snapshotOpenDetails walks managed
  // sections and records which keys are currently open; restoreOpenDetails
  // re-applies after the render. (Long-content drill-ins — file
  // previews, diffs, logs, config — open in the side panel instead,
  // which lives outside the managed sections and survives re-render
  // on its own.)
  function snapshotOpenDetails() {
    const open = new Set();
    for (const id of MANAGED_SECTION_IDS) {
      const sect = document.getElementById(id);
      if (!sect) continue;
      for (const d of sect.querySelectorAll("details[data-restore-key]")) {
        if (d.open) open.add(d.dataset.restoreKey);
      }
    }
    return open;
  }
  function restoreOpenDetails(open) {
    if (!open.size) return;
    for (const id of MANAGED_SECTION_IDS) {
      const sect = document.getElementById(id);
      if (!sect) continue;
      for (const d of sect.querySelectorAll("details[data-restore-key]")) {
        if (open.has(d.dataset.restoreKey)) d.open = true;
      }
    }
  }

  function operatorIsTyping() {
    const el_ = document.activeElement;
    if (!el_ || el_ === document.body) return false;
    const tag = el_.tagName;
    if (tag !== "INPUT" && tag !== "TEXTAREA" && tag !== "SELECT") return false;
    return MANAGED_SECTION_IDS.some((id) => {
      const sect = document.getElementById(id);
      return sect && sect.contains(el_);
    });
  }

  async function refreshState() {
    // Don't yank the form out from under the operator. Try again
    // shortly on the next tick; eventually they'll blur and the
    // refresh lands.
    if (operatorIsTyping()) {
      if (pollTimer) clearTimeout(pollTimer);
      pollTimer = setTimeout(refreshState, 2000);
      return;
    }
    try {
      const resp = await fetch("/api/state");
      if (!resp.ok) throw new Error("http " + resp.status);
      const s = await resp.json();
      // Stash the latest snapshot for any sub-widget that wants a
      // synchronous read (e.g. the compose autocomplete pulls agent
      // names from here instead of refetching on every keystroke).
      window.__hyperhive_state = s;
      renderServerWarnings(s.server_warnings);
      // Hive identity: render the swarm/hive name as a headline at the
      // top of the SW4RM pane + update the page title once the
      // server-side display names are known. `hive_name` / `swarm_name`
      // come from HYPERHIVE_HIVE_NAME / HYPERHIVE_SWARM_NAME env vars
      // (set by services.hyperhive.{hiveName,swarmName} nix options).
      // When unset we fall back gracefully — the headline stays hidden.
      const hiveId = $("swarm-identity");
      if (hiveId) {
        const hive = s.hive_name;
        const swarm = s.swarm_name;
        if (hive || swarm) {
          const label = swarm && hive ? `${swarm} / ${hive}` : hive || swarm;
          hiveId.textContent = label;
          hiveId.hidden = false;
          document.title = label + " // h1ve-c0re";
        }
      }
      const openDetails = snapshotOpenDetails();
      // Sync transients + containers first so renderContainers below
      // sees the current derived maps (it reads from
      // `transientsState` + `containersState`, not from `s.*`).
      syncTransientsFromSnapshot(s);
      syncContainersFromSnapshot(s);
      // Job-queue rollup feeds only the SW4RM queue-summary banner
      // (per-agent card badges are transient-only — see swarm.js). Its
      // own `JobqRollup` mount self-fetches GET /api/jobq/rollup — not
      // read off `s` (this page's snapshot carries no jobq field).
      // initJobqRollup mounts once and is a no-op on later calls; the
      // mount's own effect handles the actual fetch.
      initJobqRollup();
      renderContainers(s);
      restoreOpenDetails(openDetails);
      // No periodic refresh timer. Phase 6 covers every container
      // mutation with `ContainerStateChanged` / `ContainerRemoved`
      // (lifecycle ops, destroy, rebuild, crash_watch's 10s poll);
      // transients have their own events;
      // broker traffic flows through the SSE channel. The only
      // /api/state fetches are the initial cold load and the
      // post-submit refetch on forms without `data-no-refresh`
      // (tombstones, meta-input updates).
      if (pollTimer) {
        clearTimeout(pollTimer);
        pollTimer = null;
      }
    } catch (err) {
      console.error("refreshState failed", err);
      // Schedule a single retry on transient errors so the page
      // recovers from a brief network blip without making the
      // operator reload.
      pollTimer = setTimeout(refreshState, 5000);
    }
  }
  refreshState();

  // ─── live updates: dashboard event stream ──────────────────────────────
  // The dashboard subscribes to /dashboard/stream for live mutation
  // events so the SW4RM / SYST3M panes update without an
  // operator action triggering a refreshState.
  //
  // Bare `EventSource` (no terminal infrastructure needed — the
  // dashboard doesn't render broker rows). Each event's `kind` is
  // looked up against `MUTATION_HANDLERS`; unknown kinds (broker
  // `sent` / `delivered`, anything new the backend adds) silently
  // no-op. On (re)connect we kick a refreshState() to recover events
  // lost during the disconnect window (same pattern as flow.js's
  // onStreamOpen).
  //
  // Both /dashboard.html and /flow.html subscribe to `/api/dashboard/stream`
  // and filter client-side — the dashboard ignores broker traffic
  // and FL0W ignores mutation events.
  const MUTATION_HANDLERS = {
    transient_set: applyTransientSet,
    transient_cleared: applyTransientCleared,
    container_state_changed: applyContainerStateChanged,
    container_removed: applyContainerRemoved,
    // rebuild_queue_changed: refreshes the SW4RM queue-summary banner
    // (see swarm.js) — a payload-less push trigger, same treatment
    // /builds.html gives it for its JobqGraph mount handle's .refresh()
    // (its own separate subscription).
    rebuild_queue_changed: applyRebuildQueueChanged,
    capabilities_changed: applyCapabilitiesChanged,
    tool_groups_changed: applyToolGroupsChanged,
  };
  (function bindDashboardStream() {
    // Route through the SharedWorker so all open hyperhive tabs on the
    // SAME kinds= filter share one upstream SSE connection — see
    // docs/web-ui/shape.md (SSE multiplexing paragraph) for the design
    // + Firefox throttling motivation. `openStream` returns an
    // EventSource-shaped facade with a graceful direct-EventSource
    // fallback when SharedWorker isn't supported.
    //
    // kinds= matches MUTATION_HANDLERS verbatim, so the stream carries
    // only the 7 wire kinds this page acts on.
    const es = openStream(
      "/api/dashboard/stream?kinds=" +
        "transient_set,transient_cleared," +
        "container_state_changed,container_removed,rebuild_queue_changed," +
        "capabilities_changed,tool_groups_changed",
    );
    es.onmessage = (e) => {
      let ev;
      try {
        ev = JSON.parse(e.data);
      } catch {
        return;
      }
      const h = MUTATION_HANDLERS[ev.kind];
      if (!h) return; // broker rows + future kinds — dashboard doesn't care
      try {
        h(ev);
      } catch (err) {
        console.error("dashboard SSE handler", ev.kind, err);
      }
    };
    es.onopen = () => {
      // Re-sync to recover events that fired during the SSE disconnect
      // window. Initial connect also fires onopen — the first
      // refreshState() above and this one race, but refreshState is
      // idempotent so the second call just overwrites with the
      // freshest snapshot. Cheap on a quiescent server, fine to repeat.
      refreshState();
    };
    es.onerror = () => {
      // EventSource auto-reconnects; nothing to do beyond logging.
      console.debug("dashboard SSE error, will retry");
    };
  })();

  // ─── tab routing ───────────────────────────────────────────────────────
  // Hash-based: `#swarm` / `#system` / `#permissions` activate the
  // matching pane on the dashboard. Empty
  // hash defaults to SW4RM. FL0W and ST4TS are NOT tabs —
  // they're separate pages (`/flow.html`, `/stats.html`) reached from
  // the H0M3 hub. Tab routing only
  // applies when the tab DOM is present (e.g. not on the flow page
  // itself, where these elements don't exist and the loop no-ops).
  // The shared hash-routed tab strip (@hive/shared/tabs.js) owns the
  // tab/pane toggle + aria-selected + routing; `activateTab` runs the
  // per-tab side-effects via the strip's onShow. Constructed below (after
  // the lazy-load fns it calls are defined). The responsive overflow menu
  // was dropped — if the strip ever runs out of room we move panes
  // to their own pages rather than hide them in a dropdown.
  function activateTab(target) {
    // Track active tab on the body so renderSelectionBar can gate
    // visibility (bar only belongs on SW4RM where agent cards live).
    document.body.dataset.activeTab = target;
    renderSelectionBar(Array.from(containersState.values()));
    // Permissions tables: SSE covers worker-applied changes
    // (capabilities_changed / tool_groups_changed); re-fetch on
    // activation as a safety net for any gap between SSE events and
    // the cold-load snapshot.
    if (target === "permissions") {
      initPermissions();
      fetchAndRenderCapabilities();
      fetchAndRenderToolGroups();
    }
  }

  // Wire the shared tab strip now that activateTab + the lazy-load fns it
  // calls are defined. The strip resolves the active tab from the hash
  // (default SW4RM), toggles the active tab/pane + aria-selected, and
  // fires activateTab for the per-tab side-effects on every change.
  createTabStrip($("tabbar"), { defaultId: "swarm", onShow: activateTab });

  // Tab count pills — pure derived data from the existing state
  // stores so SSE-driven updates flow through without extra plumbing.
  // Set `hidden` when the count is zero so the pill doesn't draw
  // attention to an empty room.

  function setTabCount(tab, n) {
    const el_ = $("tab-count-" + tab);
    if (!el_) return;
    el_.textContent = String(n);
    el_.hidden = n <= 0;
  }
  /** Recompute every tab's count from the current state. Called on
   *  every renderXxx that's tab-relevant. */
  function refreshTabCounts() {
    // SW4RM — flag any container that's stale (needs_update). Empty
    // when everyone's current. Container-row pulse signals state
    // transitions; the pill catches "deploy-pending" specifically.
    let swarm = 0;
    for (const c of containersState.values()) {
      if (c.needs_update) swarm++;
    }
    setTabCount("swarm", swarm);
  }
  // Poll the state stores on a 1s tick to keep the pill counts in
  // sync. The state stores are mutated synchronously by every SSE
  // event + refreshState call, so polling them is correct and cheap
  // — no per-renderer hookup needed.
  refreshTabCounts();
  setInterval(refreshTabCounts, 1000);

  // Flow-specific code (broker terminal init + the @-mention composer)
  // lives in ./flow.js — loaded only by /flow.html.
})();