"use strict";

const state = { games: [], snaps: [], byId: {}, a: null, b: null, jobStatus: {}, axes: { types: true, methods: true, events: true, fields: true, layout: false } };

// tiny DOM helper
function el(tag, props, ...kids) {
  const e = document.createElement(tag);
  for (const [k, v] of Object.entries(props || {})) {
    if (k === "class") e.className = v;
    else if (k === "html") e.innerHTML = v;
    else if (k.startsWith("on") && typeof v === "function") e.addEventListener(k.slice(2), v);
    else if (v !== false && v != null) e.setAttribute(k, v === true ? "" : v);
  }
  for (const k of kids.flat()) {
    if (k == null || k === false) continue;
    e.append(k.nodeType ? k : document.createTextNode(String(k)));
  }
  return e;
}
const $ = (id) => document.getElementById(id);

async function jget(url) {
  const r = await fetch(url);
  if (!r.ok) throw new Error(url + " → " + r.status);
  return r.json();
}

// --- axis configuration (mirrors ams.diff / ams.render) --------------------------------------
const AXES = [
  { key: "types", title: "Typy",
    fmt: (t) => `${t.script_name} → ${t.cpp_class || "?"} (size ${t.object_size})${t.via_module_iface ? "  ⟨iface⟩" : ""}`,
    name: (t) => t.script_name },
  { key: "methods", title: "Metody",
    fmt: (m) => `${m.owner} · ${m.name} (id ${m.id})`, name: (m) => `${m.owner}.${m.name}` },
  { key: "events", title: "Eventy",
    fmt: (e) => `${e.owner} · ${e.name} (#${e.order})`, name: (e) => `${e.owner}.${e.name}` },
  { key: "fields", title: "Pola skryptowe",
    fmt: (f) => `${f.owner} · ${f.name} : ${f.type}`, name: (f) => `${f.owner}.${f.name}` },
  { key: "struct_layout", uikey: "layout", title: "Layout C++ (bonus)",
    fmt: (x) => `${x.owner} @${hex(x.offset)} size ${x.size}${x.is_vtable ? " vtable" : ""}`,
    name: (x) => `${x.owner}@${x.offset}` },
];
const hex = (n) => "0x" + Number(n).toString(16);

// --- sidebar ----------------------------------------------------------------------------------
async function load() {
  const [games, snaps] = await Promise.all([jget("/games"), jget("/snapshots")]);
  state.games = games; state.snaps = snaps;
  state.byId = Object.fromEntries(snaps.map((s) => [s.id, s]));
  renderSidebar();
  renderAxesControl();
}

function renderSidebar() {
  const root = $("games"); root.innerHTML = "";
  const byGame = new Map();
  for (const s of state.snaps) {
    const g = s.game_id == null ? 0 : s.game_id;
    if (!byGame.has(g)) byGame.set(g, []);
    byGame.get(g).push(s);
  }
  const gameName = (id) => (state.games.find((g) => g.id === id) || {}).name || "(bez gry)";
  for (const [gid, list] of byGame) {
    const box = el("div", { class: "game" }, el("div", { class: "game-name" }, gameName(gid)));
    for (const s of list) box.append(snapRow(s));
    root.append(box);
  }
}

function snapRow(s) {
  const mkAB = (slot) => el("button", {
    class: state[slot] === s.id ? "on" : "", title: "ustaw jako " + slot.toUpperCase(),
    onclick: () => { state[slot] = state[slot] === s.id ? null : s.id; refreshSelection(); },
  }, slot.toUpperCase());
  return el("div", { class: "snap", "data-id": s.id },
    el("div", { class: "info", onclick: () => browse(s.id) },
      el("div", { class: "bin" }, s.binary_name,
        el("span", { class: "pill" }, `${s.engine || "?"}/${s.compiler || "?"}`)),
      el("div", { class: "meta" }, `T${s.n_types} · M${s.n_methods} · E${s.n_events} · F${s.n_fields}`)),
    el("div", { class: "ab" }, mkAB("a"), mkAB("b")));
}

function refreshSelection() {
  document.querySelectorAll(".snap").forEach((row) => {
    const id = Number(row.dataset.id);
    const [a, b] = row.querySelectorAll(".ab button");
    a.className = state.a === id ? "on" : "";
    b.className = state.b === id ? "on" : "";
  });
  const lbl = (id) => { const s = state.byId[id]; return s ? `${s.binary_name} [${s.engine}]` : "—"; };
  $("slot-a").innerHTML = "A: "; $("slot-a").append(el("em", {}, lbl(state.a)));
  $("slot-b").innerHTML = "B: "; $("slot-b").append(el("em", {}, lbl(state.b)));
  $("compare").disabled = !(state.a && state.b);
}

function renderAxesControl() {
  const box = $("axes"); box.innerHTML = "";
  for (const ax of AXES) {
    const k = ax.uikey || ax.key;
    box.append(el("label", {},
      el("input", { type: "checkbox", ...(state.axes[k] ? { checked: true } : {}),
        onchange: (e) => { state.axes[k] = e.target.checked; } }), " " + ax.title.split(" ")[0]));
  }
}

// --- upload + jobs ----------------------------------------------------------------------------
const ACTIVE = new Set(["queued", "started"]);

function setupUpload() {
  const form = $("upload-form");
  $("upload-toggle").addEventListener("click", () => {
    form.hidden = !form.hidden;
    if (!form.hidden) $("upload-file").focus();
  });
  form.addEventListener("submit", submitUpload);
}

async function submitUpload(e) {
  e.preventDefault();
  const file = $("upload-file").files[0];
  if (!file) return;
  const msg = $("upload-msg");
  const fd = new FormData();
  fd.append("file", file);
  const game = $("upload-game").value.trim();
  if (game) fd.append("game", game);

  $("upload-submit").disabled = true;
  msg.className = "upload-msg";
  msg.textContent = "wysyłanie…";
  try {
    const r = await fetch("/jobs", { method: "POST", body: fd });
    if (!r.ok) {
      const detail = await r.json().catch(() => ({}));
      throw new Error(detail.detail || ("HTTP " + r.status));
    }
    const job = await r.json();
    msg.textContent = "zlecono #" + job.id + " — analiza w toku…";
    $("upload-form").reset();
    pollJobs();  // kick the poller so the new job shows up + tracks to completion
  } catch (err) {
    msg.className = "upload-msg err";
    msg.textContent = "błąd: " + err.message;
  } finally {
    $("upload-submit").disabled = false;
  }
}

let _jobTimer = null;
async function pollJobs() {
  let jobs;
  try { jobs = await jget("/jobs"); }
  catch { return; }  // endpoint may be absent in a stripped deploy — fail quiet

  // when a tracked job flips to finished, a new snapshot is in the catalog → refresh the list
  let finished = false;
  for (const j of jobs) {
    if (state.jobStatus[j.id] && state.jobStatus[j.id] !== j.status && j.status === "finished")
      finished = true;
    state.jobStatus[j.id] = j.status;
  }
  renderJobs(jobs);
  if (finished) load();

  clearTimeout(_jobTimer);
  if (jobs.some((j) => ACTIVE.has(j.status)))
    _jobTimer = setTimeout(pollJobs, 2500);
}

function jobBadge(status) {
  const cls = { queued: "b-q", started: "b-s", finished: "b-add", failed: "b-del" }[status] || "b-q";
  return el("span", { class: "badge " + cls }, status);
}

function renderJobs(jobs) {
  const root = $("jobs"); root.innerHTML = "";
  if (!jobs.length) return;
  root.append(el("div", { class: "jobs-title" }, "Zadania"));
  for (const j of jobs.slice(0, 8)) {
    const row = el("div", { class: "job", title: j.error || "" },
      el("span", { class: "jname" }, j.source_name),
      jobBadge(j.status));
    if (j.status === "finished" && j.snapshot_id != null)
      row.append(el("span", { class: "jlink", onclick: () => browse(j.snapshot_id) },
        j.dll_name || "snapshot"));
    if (j.status === "failed" && j.error)
      row.append(el("span", { class: "jerr" }, j.error));
    root.append(row);
  }
}

// --- diff -------------------------------------------------------------------------------------
async function compare() {
  if (!state.a || !state.b) return;
  const owner = $("owner").value.trim();
  const q = new URLSearchParams({ old: state.a, new: state.b });
  if (owner) q.set("owner", owner);
  const out = $("results"); out.innerHTML = "ładowanie…";
  try {
    const d = await jget("/diff?" + q.toString());
    renderDiff(d, owner);
  } catch (e) {
    out.innerHTML = ""; out.append(el("div", { class: "err" }, "Błąd: " + e.message));
  }
}

function renderDiff(d, owner) {
  const out = $("results"); out.innerHTML = "";
  const bf = d.binary.from, bt = d.binary.to;
  out.append(el("div", { class: "diff-head" },
    "from ", el("b", {}, `${bf.name} [${bf.engine}/${bf.compiler}]`),
    "  →  to ", el("b", {}, `${bt.name} [${bt.engine}/${bt.compiler}]`),
    owner ? `   (klasa: ${owner})` : ""));

  let any = false;
  for (const ax of AXES) {
    const k = ax.uikey || ax.key;
    if (!state.axes[k]) continue;
    const block = d[ax.key];
    if (!block) continue;
    const n = block.added.length + block.removed.length + block.changed.length;
    if (n === 0) continue;
    any = true;
    out.append(axisCard(ax, block));
  }
  if (d.moved_methods && d.moved_methods.length) {
    any = true;
    out.append(movedCard(d.moved_methods));
  }
  if (!any) out.append(el("div", { class: "empty" }, "Brak różnic w wybranych osiach."));
}

function badge(cls, label, n) { return el("span", { class: "badge " + cls }, `${label} ${n}`); }

function axisCard(ax, block) {
  const body = el("div", { class: "body" });
  const sortByName = (arr) => arr.slice().sort((x, y) => ax.name(x).localeCompare(ax.name(y)));
  for (const it of sortByName(block.added)) body.append(el("div", { class: "row r-add" }, ax.fmt(it)));
  for (const it of sortByName(block.removed)) body.append(el("div", { class: "row r-del" }, ax.fmt(it)));
  for (const ch of block.changed.slice().sort((x, y) => ax.name(x.item).localeCompare(ax.name(y.item)))) {
    const deltas = Object.entries(ch.changes).map(([f, v]) => `${f}: ${v[0]} → ${v[1]}`).join(", ");
    body.append(el("div", { class: "row r-chg" }, ax.name(ch.item), "  ", el("span", { class: "delta" }, deltas)));
  }
  return el("details", { class: "axis", open: true },
    el("summary", {}, el("span", { class: "title" }, ax.title),
      badge("b-add", "+", block.added.length),
      badge("b-del", "−", block.removed.length),
      badge("b-chg", "~", block.changed.length)),
    body);
}

function movedCard(moves) {
  const body = el("div", { class: "body" });
  for (const m of moves.slice().sort((a, b) => a.name.localeCompare(b.name)))
    body.append(el("div", { class: "row moved" }, `${m.name}: ${m.from_owners.join(",")} → ${m.to_owners.join(",")}`));
  return el("details", { class: "axis", open: true },
    el("summary", {}, el("span", { class: "title" }, "Metody przeniesione w hierarchii"),
      badge("b-chg", "↦", moves.length)), body);
}

// --- single-snapshot browse -------------------------------------------------------------------
async function browse(id) {
  const out = $("results"); out.innerHTML = "ładowanie…";
  let snap;
  try { snap = await jget("/snapshots/" + id); }
  catch (e) { out.innerHTML = ""; out.append(el("div", { class: "err" }, "Błąd: " + e.message)); return; }
  const d = snap.data;
  const tabs = [
    ["Typy", (d.types || []).map((t) => `${t.script_name} → ${t.cpp_class || "?"} (size ${t.object_size})`)],
    ["Metody", (d.methods || []).map((m) => `${m.owner} · ${m.name} (id ${m.id})`)],
    ["Eventy", (d.events || []).map((e) => `${e.owner} · ${e.name}`)],
    ["Pola", (d.fields || []).map((f) => `${f.owner} · ${f.name} : ${f.type}`)],
  ];
  out.innerHTML = "";
  out.append(el("div", { class: "diff-head" }, "Przegląd: ", el("b", {}, `${snap.binary_name} [${snap.engine}/${snap.compiler}]`)));
  const simBox = el("div", { class: "similar" });
  out.append(simBox);
  loadSimilar(id, simBox);
  const filter = el("input", { class: "owner browse-filter", placeholder: "filtruj…", oninput: () => render() });
  const tabbar = el("div", {});
  const list = el("div", {});
  let active = 0;
  function render() {
    tabbar.innerHTML = "";
    tabs.forEach(([name, items], i) =>
      tabbar.append(el("span", { class: "btab" + (i === active ? " on" : ""), onclick: () => { active = i; render(); } },
        `${name} (${items.length})`)));
    const q = filter.value.trim().toLowerCase();
    list.innerHTML = "";
    const items = tabs[active][1].filter((s) => !q || s.toLowerCase().includes(q));
    for (const s of items) list.append(el("div", { class: "bitem" }, s));
    if (!items.length) list.append(el("div", { class: "empty" }, "—"));
  }
  out.append(tabbar, filter, list);
  render();
}

async function loadSimilar(targetId, box) {
  let hits;
  try { hits = await jget("/snapshots/" + targetId + "/similar"); }
  catch { return; }  // endpoint absent / single-snapshot catalog — just show nothing
  if (!hits.length) return;
  box.append(el("div", { class: "similar-title" }, "Podobne wersje (overlap powierzchni)"));
  for (const h of hits.slice(0, 6)) {
    const s = h.snapshot;
    const bar = el("span", { class: "simbar" },
      el("span", { class: "simfill", style: "width:" + h.overall + "%" }));
    box.append(el("div", { class: "simrow" },
      el("span", { class: "simscore" }, h.overall + "%"),
      bar,
      el("span", { class: "simname", title: "przejrzyj", onclick: () => browse(s.id) },
        `${s.binary_name} [${s.engine || "?"}]`),
      h.fuzzy != null ? el("span", { class: "simfuzzy", title: "ssdeep binarki" }, "fuzzy " + h.fuzzy) : null,
      el("span", { class: "simdiff", title: "porównaj tę wersję z aktualną",
        onclick: () => { state.a = targetId; state.b = s.id; refreshSelection(); compare(); } }, "⇄ diff")));
  }
}

// --- boot -------------------------------------------------------------------------------------
$("compare").addEventListener("click", compare);
$("owner").addEventListener("keydown", (e) => { if (e.key === "Enter") compare(); });
setupUpload();
pollJobs();
load().catch((e) => { $("results").innerHTML = ""; $("results").append(el("div", { class: "err" }, "Nie udało się załadować: " + e.message)); });