"use strict";
/* ================= 飞行员大厅（主页）：排行榜 + 图鉴展柜背景 ================= */
let LB_SORT = "endless";
let HOME_SHOW = null;

/* 图鉴已收集数（只统计合法 key） */
function codexCount() {
  let n = 0;
  for (const k in SAVE.codex)
    if (SAVE.codex[k] && (WEAPONS[k] || SUBS[k] || DRONES[k] || PASSIVES[k])) n++;
  return n;
}

async function enterHome() {
  G = null;
  UI = "home";
  rollHomeShow();
  show("o-home");
  /* 刷新账号数据（stats/codex），再渲染面板与排行榜 */
  const r = await NET.api("/api/me", "GET");
  if (r.ok) NET._apply(r.data);
  else if (r.status === 401) { NET.user = null; UI = "auth"; show("o-auth"); return; }
  buildHomeStats();
  buildLeaderboard(LB_SORT);
}

function buildHomeStats() {
  const s = NET.stats || { bossKills: 0, endlessHigh: 0 };
  const nm = NET.user ? NET.user.username : "--";
  $("home-stats").textContent =
    `${nm} · 击坠Boss ${s.bossKills} · 图鉴 ${codexCount()}/${NET.codexTotal} · 无尽最高 ${s.endlessHigh}`;
}

/* ---------- 排行榜 ---------- */
document.querySelectorAll(".lb-tabs button").forEach((b) => {
  b.onclick = () => {
    LB_SORT = b.dataset.s;
    document.querySelectorAll(".lb-tabs button").forEach((x) => x.classList.toggle("on", x === b));
    SFX.pick();
    buildLeaderboard(LB_SORT);
  };
});

async function buildLeaderboard(sort) {
  const list = $("lb-list");
  list.innerHTML = '<div class="lb-empty">载入中...</div>';
  const r = await NET.api("/api/leaderboard?sort=" + sort, "GET");
  if (!r.ok) { list.innerHTML = '<div class="lb-empty">载入失败</div>'; return; }
  const rows = r.data.rows || [];
  list.innerHTML = "";
  if (!rows.length) { list.innerHTML = '<div class="lb-empty">虚位以待</div>'; return; }
  const meName = NET.user && NET.user.username;
  rows.forEach((row, i) => {
    const d = document.createElement("div");
    d.className = "lb-row" + (meName && row.username === meName ? " me" : "");
    const cells = [String(i + 1), row.username, String(row.bossKills), row.codexN + "/" + r.data.codexTotal, String(row.endlessHigh)];
    for (const c of cells) {
      const s = document.createElement("span");
      s.textContent = c; // textContent 防注入
      d.appendChild(s);
    }
    list.appendChild(d);
  });
}

/* ---------- 大厅背景：随机军械展柜 + 随机刷怪巡游 ---------- */
const HOME_MOB_TYPES = ["scout", "weaver", "kami", "splitter", "mine", "gunship", "sniper"];

function rollHomeShow() {
  HOME_SHOW = {
    m: shuffle(Object.keys(WEAPONS)).slice(0, 3),
    s: shuffle(Object.keys(SUBS)).slice(0, 3),
    d: shuffle(Object.keys(DRONES)).slice(0, 2),
    t: 0, spawnT: 20, mobs: [],
  };
}

/* 由 render() 在 UI==="home" 时每帧调用（dt=1） */
function drawHomeShowcase(dt) {
  if (!HOME_SHOW || HOME_SHOW.t > 1800) rollHomeShow(); // 30 秒重抽一轮
  const hs = HOME_SHOW;
  hs.t += dt;
  /* 展柜：3主武+3副武+2僚机，两排漂浮 */
  const items = [
    ...hs.m.map((k) => ({ d: WEAPONS[k] })),
    ...hs.s.map((k) => ({ d: SUBS[k] })),
    ...hs.d.map((k) => ({ d: DRONES[k] })),
  ];
  ctx.textAlign = "center";
  items.forEach((it, i) => {
    const col = i % 4, row = (i / 4) | 0;
    const x = W / 2 + (col - 1.5) * 56;
    const y = 118 + row * 52 + Math.sin(hs.t * 0.03 + i * 1.7) * 2.5;
    const img = it.d.icon ? ICONS[it.d.icon] : SPR[it.d.spr];
    if (img) {
      ctx.globalAlpha = 0.85;
      ctx.drawImage(img, x - img.width * 1.5, y - img.height * 1.5, img.width * 3, img.height * 3);
      ctx.globalAlpha = 1;
    }
    ctx.font = "6px 'Press Start 2P',monospace";
    ctx.fillStyle = "#7f8cb8";
    ctx.fillText(it.d.name, x, y + 22);
  });
  /* 随机刷怪：从顶部飘入，正弦摆动 */
  hs.spawnT -= dt;
  if (hs.spawnT <= 0 && hs.mobs.length < 8) {
    hs.spawnT = rndi(50, 110);
    const ty = pick(HOME_MOB_TYPES), elite = Math.random() < 0.2;
    const spr = SPR[(elite ? "e_" : "") + ty] || SPR[ty] || SPR.scout;
    hs.mobs.push({ x: rnd(20, W - 20), y: -16, vy: rnd(0.25, 0.6), ph: rnd(0, TAU), amp: rnd(6, 26), spr, sc: elite ? 1.8 : 1.3, t: 0 });
  }
  for (const m of hs.mobs) {
    m.t += dt;
    m.y += m.vy * dt;
    const mx = m.x + Math.sin(m.t * 0.02 + m.ph) * m.amp;
    ctx.globalAlpha = 0.8;
    ctx.drawImage(m.spr, mx - (m.spr.width * m.sc) / 2, m.y - (m.spr.height * m.sc) / 2, m.spr.width * m.sc, m.spr.height * m.sc);
    ctx.globalAlpha = 1;
  }
  hs.mobs = hs.mobs.filter((m) => m.y < H + 24);
}