// ── STATE ──────────────────────────────────────────
let urlMode = false;
let level = 1;
let fpCount = 0;
let primaryClasses = [];
let otherClasses = [];
let spells = [];
let bonds = [
  { name: '', feelings: [] },
  { name: '', feelings: [] },
  { name: '', feelings: [] },
  { name: '', feelings: [] },
  { name: '', feelings: [] },
  { name: '', feelings: [] },
];

const STATUSES = ['Slow', 'Enraged', 'Dazed', 'Weak', 'Poisoned', 'Shaken'];
const FEELINGS = ['Admiration', 'Inferiority', 'Loyalty', 'Mistrust', 'Affection', 'Hatred'];

// ── TABS ───────────────────────────────────────────
function switchTab(tab) {
  document.querySelectorAll('.tab').forEach(t => t.classList.remove('active'));
  document.querySelectorAll('.page').forEach(p => p.classList.remove('active'));
  event.currentTarget.classList.add('active');
  document.getElementById('page-' + tab).classList.add('active');
}

// ── INIT ───────────────────────────────────────────
async function init() {
  const savedTheme = localStorage.getItem('fabulaUltimaTheme')
    || (window.matchMedia('(prefers-color-scheme: light)').matches ? 'light' : 'dark');
  document.getElementById('themeToggle').textContent = savedTheme === 'light' ? '☾ Dark' : '☀ Light';
  renderStatuses();
  renderFP();
  renderBonds();
  renderPrimaryClasses();
  renderOtherClasses();
  renderSpells();
  updateXPBar();
  if (!await tryLoadFromURL()) tryAutoLoad();
}

// ── URL STATE ──────────────────────────────────────
async function compressToBase64(str) {
  const stream = new CompressionStream('deflate-raw');
  const writer = stream.writable.getWriter();
  writer.write(new TextEncoder().encode(str));
  writer.close();
  const buf = await new Response(stream.readable).arrayBuffer();
  const bytes = new Uint8Array(buf);
  let binary = '';
  for (let i = 0; i < bytes.length; i++) binary += String.fromCharCode(bytes[i]);
  return btoa(binary);
}

async function decompressFromBase64(b64) {
  try {
    const bytes = Uint8Array.from(atob(b64), c => c.charCodeAt(0));
    const stream = new DecompressionStream('deflate-raw');
    const writer = stream.writable.getWriter();
    writer.write(bytes);
    writer.close();
    const buf = await new Response(stream.readable).arrayBuffer();
    return new TextDecoder().decode(buf);
  } catch {
    // Fall back to legacy uncompressed URLs
    return decodeURIComponent(escape(atob(b64)));
  }
}

async function tryLoadFromURL() {
  const encoded = new URLSearchParams(window.location.search).get('c');
  if (!encoded) return false;
  try {
    const json = await decompressFromBase64(encoded);
    applyData(JSON.parse(json));
    urlMode = true;
    document.getElementById('urlBanner').style.display = 'block';
    return true;
  } catch (e) {
    console.warn('Could not load state from URL:', e);
    return false;
  }
}

// ── STATUS EFFECTS ─────────────────────────────────
function renderStatuses() {
  const g = document.getElementById('statusGrid');
  g.innerHTML = '';
  STATUSES.forEach(s => {
    const el = document.createElement('div');
    el.className = 'status-item';
    el.dataset.status = s;
    el.onclick = () => { el.classList.toggle('active-status'); el.querySelector('.status-check').textContent = el.classList.contains('active-status') ? '✗' : ''; };
    el.innerHTML = `<div class="status-check"></div><div class="status-label">${s}</div>`;
    g.appendChild(el);
  });
}

// ── FABULA POINTS ──────────────────────────────────
function renderFP() {
  fpCount = parseInt(document.getElementById('fpCount').value) || 0;
  const pips = document.getElementById('fpPips');
  const total = Math.max(10, fpCount);
  pips.innerHTML = '';
  for (let i = 0; i < total; i++) {
    const pip = document.createElement('div');
    pip.className = 'fp-pip' + (i < fpCount ? ' filled' : '');
    pip.onclick = () => {
      const newVal = i < fpCount ? i : i + 1;
      document.getElementById('fpCount').value = newVal;
      renderFP();
    };
    pips.appendChild(pip);
  }
}

// ── BONDS ──────────────────────────────────────────
function renderBonds() {
  const container = document.getElementById('bondsContainer');
  container.innerHTML = '';
  bonds.forEach((bond, idx) => {
    const el = document.createElement('div');
    el.className = 'bond-block';
    el.innerHTML = `
      <div class="bond-header">
        <div class="bond-num">${idx + 1}</div>
        <input type="text" placeholder="Bond target name…" value="${bond.name}" oninput="bonds[${idx}].name=this.value">
      </div>
      <div class="bond-feelings">
        ${FEELINGS.map(f => `
          <div class="bond-feeling${bond.feelings.includes(f) ? ' active' : ''}" onclick="toggleFeeling(${idx},'${f}',this)">
            <div class="bond-feeling-box">${bond.feelings.includes(f) ? '✓' : ''}</div>
            <span>${f}</span>
          </div>`).join('')}
      </div>`;
    container.appendChild(el);
  });
}

function toggleFeeling(bondIdx, feeling, el) {
  const bond = bonds[bondIdx];
  if (bond.feelings.includes(feeling)) {
    bond.feelings = bond.feelings.filter(f => f !== feeling);
    el.classList.remove('active');
    el.querySelector('.bond-feeling-box').textContent = '';
  } else {
    bond.feelings.push(feeling);
    el.classList.add('active');
    el.querySelector('.bond-feeling-box').textContent = '✓';
  }
}

// ── LEVEL ──────────────────────────────────────────
function adjustLevel(delta) {
  level = Math.max(1, Math.min(50, level + delta));
  document.getElementById('levelDisplay').textContent = level;
}

// ── XP BAR ─────────────────────────────────────────
function updateXPBar() {
  const xp = parseInt(document.getElementById('xpCurrent').value) || 0;
  const pct = Math.min((xp % 10) * 10, 100);
  document.getElementById('xpBar').style.width = pct + '%';
  document.getElementById('xpVal').textContent = xp + ' XP';
}

// ── STAT CALC ──────────────────────────────────────
function recalcStats() { /* auto-calc on keyup */ }

function calcHP() {
  const mig = parseInt(document.getElementById('mig-base').value) || 6;
  const max = mig * 5 + level;
  document.getElementById('hpMax').value = max;
  if (!document.getElementById('hpCur').value) document.getElementById('hpCur').value = max;
  updateCrisis();
}

function calcMP() {
  const wlp = parseInt(document.getElementById('wlp-base').value) || 6;
  const max = wlp * 5 + level;
  document.getElementById('mpMax').value = max;
  if (!document.getElementById('mpCur').value) document.getElementById('mpCur').value = max;
}

function updateCrisis() {
  const max = parseInt(document.getElementById('hpMax').value) || 0;
  const cur = parseInt(document.getElementById('hpCur').value) || 0;
  const badge = document.getElementById('crisisBadge');
  badge.style.display = (max > 0 && cur <= Math.floor(max / 2)) ? 'block' : 'none';
}

// ── MARTIAL ────────────────────────────────────────
function toggleMartial(el) { el.classList.toggle('checked'); el.querySelector('.martial-box').textContent = el.classList.contains('checked') ? '✓' : ''; }

// ── DISCIPLINES ────────────────────────────────────
function toggleDisc(el) { el.classList.toggle('checked'); el.querySelector('.disc-box').textContent = el.classList.contains('checked') ? '✓' : ''; }

// ── CLASSES ────────────────────────────────────────
function classBlockHTML(cls, idx, type) {
  return `
    <div class="class-block" id="${type}-class-${idx}">
      <div class="class-header">
        <input type="text" placeholder="Class name…" value="${cls.name || ''}" oninput="${type}Classes[${idx}].name=this.value">
        <input type="text" placeholder="Free benefits…" value="${cls.benefits || ''}" oninput="${type}Classes[${idx}].benefits=this.value">
      </div>
      <div class="class-skills">
        <textarea placeholder="Skill information…" oninput="${type}Classes[${idx}].skills=this.value">${cls.skills || ''}</textarea>
      </div>
      <div style="padding:6px 10px; border-top:1px solid var(--border); display:flex; justify-content:flex-end;">
        <button class="spell-del-btn" onclick="removeClass('${type}',${idx})">✕ Remove</button>
      </div>
    </div>`;
}

function renderPrimaryClasses() {
  document.getElementById('primaryClassContainer').innerHTML = primaryClasses.map((c, i) => classBlockHTML(c, i, 'primary')).join('');
}

function renderOtherClasses() {
  document.getElementById('otherClassContainer').innerHTML = otherClasses.map((c, i) => classBlockHTML(c, i, 'other')).join('');
}

function addPrimaryClass() { primaryClasses.push({}); renderPrimaryClasses(); }
function addOtherClass() { otherClasses.push({}); renderOtherClasses(); }
function removeClass(type, idx) {
  if (type === 'primary') { primaryClasses.splice(idx, 1); renderPrimaryClasses(); }
  else { otherClasses.splice(idx, 1); renderOtherClasses(); }
}

// ── SPELLS ─────────────────────────────────────────
function renderSpells() {
  const tbody = document.getElementById('spellsBody');
  tbody.innerHTML = spells.map((s, i) => `
    <tr>
      <td class="spell-name-col">
        <input type="text" placeholder="Spell / Arcana name…" value="${s.name || ''}" oninput="spells[${i}].name=this.value">
        <textarea placeholder="Notes / effect description…" oninput="spells[${i}].notes=this.value">${s.notes || ''}</textarea>
      </td>
      <td class="spell-mp-col"><input type="number" placeholder="0" value="${s.mp || ''}" oninput="spells[${i}].mp=this.value" style="min-height:32px;"></td>
      <td class="spell-targets-col"><input type="text" placeholder="Target(s)…" value="${s.targets || ''}" oninput="spells[${i}].targets=this.value"></td>
      <td class="spell-dur-col"><input type="text" placeholder="Duration…" value="${s.duration || ''}" oninput="spells[${i}].duration=this.value"></td>
      <td class="spell-del-col"><button class="spell-del-btn" onclick="removeSpell(${i})">✕</button></td>
    </tr>`).join('');
}

function addSpell() { spells.push({}); renderSpells(); }
function removeSpell(i) { spells.splice(i, 1); renderSpells(); }

// ── SAVE / LOAD ────────────────────────────────────
// Short key legend (serialized form only; in-memory objects use full names):
//   n=name, pn=pronouns, id=identity, th=theme, og=origin, tr=traits
//   lv=level, xp=xp, z=zenit
//   im=initMod, df=defense, md=magDef
//   dxb=dexBase, dxc=dexCur, inb=insBase, inc=insCur
//   mgb=migBase, mgc=migCur, wpb=wlpBase, wpc=wlpCur
//   hx=hpMax, hc=hpCur, mx=mpMax, mc=mpCur, ix=ipMax, ic=ipCur
//   fp=fp, bp=backpack
//   acn=accName, acd=accDesc, amn=armName, amd=armDesc
//   mhn=mhName, mhd=mhDesc, ohn=ohName, ohd=ohDesc
//   hs=heroicSkills, rn=ritualsNotes
//   sa=statusesActive, ma=martialChecked, da=disciplinesChecked
//   bo=bonds, pc=primaryClasses, oc=otherClasses, sp=spells
// Nested bonds:        n=name, f=feelings
// Nested classes:      n=name, b=benefits, s=skills
// Nested spells:       n=name, nt=notes, mp=mp, tg=targets, dr=duration
function collectData() {
  const get = id => { const el = document.getElementById(id); return el ? el.value : ''; };
  const sa = [...document.querySelectorAll('.status-item.active-status')].map(el => el.dataset.status);
  const ma = [...document.querySelectorAll('.martial-item.checked')].map(el => el.querySelector('span').textContent);
  const da = [...document.querySelectorAll('.disc-item.checked')].map(el => el.querySelector('span').textContent);

  return {
    n: get('charName'), pn: get('charPronouns'),
    id: get('charIdentity'), th: get('charTheme'), og: get('charOrigin'),
    tr: get('charTraits'),
    lv: level, xp: get('xpCurrent'), z: get('zenit'),
    im: get('initMod'), df: get('defense'), md: get('magDef'),
    dxb: get('dex-base'), dxc: get('dex-cur'),
    inb: get('ins-base'), inc: get('ins-cur'),
    mgb: get('mig-base'), mgc: get('mig-cur'),
    wpb: get('wlp-base'), wpc: get('wlp-cur'),
    hx: get('hpMax'), hc: get('hpCur'),
    mx: get('mpMax'), mc: get('mpCur'),
    ix: get('ipMax'), ic: get('ipCur'),
    fp: get('fpCount'),
    bp: get('backpack'),
    acn: get('acc-name'), acd: get('acc-desc'),
    amn: get('arm-name'), amd: get('arm-desc'),
    mhn: get('mh-name'), mhd: get('mh-desc'),
    ohn: get('oh-name'), ohd: get('oh-desc'),
    hs: get('heroicSkills'),
    rn: get('ritualsNotes'),
    sa, ma, da,
    bo: bonds.map(b => ({ n: b.name, f: b.feelings })),
    pc: primaryClasses.map(c => ({ n: c.name, b: c.benefits, s: c.skills })),
    oc: otherClasses.map(c => ({ n: c.name, b: c.benefits, s: c.skills })),
    sp: spells.map(s => ({ n: s.name, nt: s.notes, mp: s.mp, tg: s.targets, dr: s.duration })),
  };
}

function saveSheet(isAuto = false) {
  if (isAuto && urlMode) return;
  const data = collectData();
  localStorage.setItem('fabulaUltimaSheet', JSON.stringify(data));
  const st = document.getElementById('saveStatus');
  st.classList.add('show');
  setTimeout(() => st.classList.remove('show'), 2000);
}

function tryAutoLoad() {
  const raw = localStorage.getItem('fabulaUltimaSheet');
  if (raw) try { applyData(JSON.parse(raw)); } catch (e) { }
}

function loadSheet() {
  const raw = localStorage.getItem('fabulaUltimaSheet');
  if (!raw) return alert('No saved sheet found.');
  try { applyData(JSON.parse(raw)); } catch (e) { alert('Could not load sheet.'); }
}

function applyData(d) {
  const set = (id, val) => { const el = document.getElementById(id); if (el && val !== undefined) el.value = val; };
  set('charName',    d.n   ?? d.name);       set('charPronouns', d.pn ?? d.pronouns);
  set('charIdentity',d.id  ?? d.identity);   set('charTheme',    d.th ?? d.theme);
  set('charOrigin',  d.og  ?? d.origin);     set('charTraits',   d.tr ?? d.traits);
  level = d.lv ?? d.level ?? 1;
  document.getElementById('levelDisplay').textContent = level;
  set('xpCurrent', d.xp);                   set('zenit',   d.z  ?? d.zenit);
  set('initMod',   d.im ?? d.initMod);      set('defense', d.df ?? d.defense);
  set('magDef',    d.md ?? d.magDef);
  set('dex-base',  d.dxb ?? d.dexBase);     set('dex-cur', d.dxc ?? d.dexCur);
  set('ins-base',  d.inb ?? d.insBase);     set('ins-cur', d.inc ?? d.insCur);
  set('mig-base',  d.mgb ?? d.migBase);     set('mig-cur', d.mgc ?? d.migCur);
  set('wlp-base',  d.wpb ?? d.wlpBase);     set('wlp-cur', d.wpc ?? d.wlpCur);
  set('hpMax',     d.hx  ?? d.hpMax);       set('hpCur',   d.hc ?? d.hpCur);
  set('mpMax',     d.mx  ?? d.mpMax);       set('mpCur',   d.mc ?? d.mpCur);
  set('ipMax',     d.ix  ?? d.ipMax);       set('ipCur',   d.ic ?? d.ipCur);
  set('fpCount',   d.fp);
  set('backpack',  d.bp  ?? d.backpack);
  set('acc-name',  d.acn ?? d.accName);     set('acc-desc', d.acd ?? d.accDesc);
  set('arm-name',  d.amn ?? d.armName);     set('arm-desc', d.amd ?? d.armDesc);
  set('mh-name',   d.mhn ?? d.mhName);      set('mh-desc',  d.mhd ?? d.mhDesc);
  set('oh-name',   d.ohn ?? d.ohName);      set('oh-desc',  d.ohd ?? d.ohDesc);
  set('heroicSkills',  d.hs ?? d.heroicSkills);
  set('ritualsNotes',  d.rn ?? d.ritualsNotes);

  // Statuses
  const sa = d.sa ?? d.statusesActive ?? [];
  document.querySelectorAll('.status-item').forEach(el => {
    const active = sa.includes(el.dataset.status);
    el.classList.toggle('active-status', active);
    el.querySelector('.status-check').textContent = active ? '✗' : '';
  });

  // Martial
  const ma = d.ma ?? d.martialChecked ?? [];
  document.querySelectorAll('.martial-item').forEach(el => {
    const checked = ma.includes(el.querySelector('span').textContent);
    el.classList.toggle('checked', checked);
    el.querySelector('.martial-box').textContent = checked ? '✓' : '';
  });

  // Disciplines
  const da = d.da ?? d.disciplinesChecked ?? [];
  document.querySelectorAll('.disc-item').forEach(el => {
    const checked = da.includes(el.querySelector('span').textContent);
    el.classList.toggle('checked', checked);
    el.querySelector('.disc-box').textContent = checked ? '✓' : '';
  });

  const rawBonds = d.bo ?? d.bonds;
  if (rawBonds) {
    bonds = rawBonds.map(b => ({ name: b.n ?? b.name, feelings: b.f ?? b.feelings ?? [] }));
    renderBonds();
  }
  const rawPrimary = d.pc ?? d.primaryClasses;
  if (rawPrimary) {
    primaryClasses = rawPrimary.map(c => ({ name: c.n ?? c.name, benefits: c.b ?? c.benefits, skills: c.s ?? c.skills }));
    renderPrimaryClasses();
  }
  const rawOther = d.oc ?? d.otherClasses;
  if (rawOther) {
    otherClasses = rawOther.map(c => ({ name: c.n ?? c.name, benefits: c.b ?? c.benefits, skills: c.s ?? c.skills }));
    renderOtherClasses();
  }
  const rawSpells = d.sp ?? d.spells;
  if (rawSpells) {
    spells = rawSpells.map(s => ({ name: s.n ?? s.name, notes: s.nt ?? s.notes, mp: s.mp, targets: s.tg ?? s.targets, duration: s.dr ?? s.duration }));
    renderSpells();
  }

  renderFP();
  updateXPBar();
  updateCrisis();
}

// ── EXPORT / IMPORT JSON ───────────────────────────
function exportSheet() {
  const data = collectData();
  const json = JSON.stringify(data, null, 2);
  const blob = new Blob([json], { type: 'application/json' });
  const url = URL.createObjectURL(blob);
  const a = document.createElement('a');
  const charName = (data.n || 'character').replace(/[^a-z0-9_\- ]/gi, '').trim() || 'character';
  a.href = url;
  a.download = charName + '-fabula-ultima.json';
  a.click();
  URL.revokeObjectURL(url);
}

function importSheet() {
  document.getElementById('importFileInput').value = '';
  document.getElementById('importFileInput').click();
}

function handleImportFile(input) {
  const file = input.files[0];
  if (!file) return;
  const reader = new FileReader();
  reader.onload = e => {
    try {
      const data = JSON.parse(e.target.result);
      applyData(data);
      saveSheet();
      const st = document.getElementById('saveStatus');
      st.textContent = 'Imported!';
      st.classList.add('show');
      setTimeout(() => { st.classList.remove('show'); st.textContent = 'Saved!'; }, 2500);
    } catch (err) {
      alert('Could not import: invalid JSON file.');
    }
  };
  reader.readAsText(file);
}

async function copyShareURL() {
  const json = JSON.stringify(collectData());
  const encoded = await compressToBase64(json);
  const url = window.location.origin + window.location.pathname + '?c=' + encodeURIComponent(encoded);
  await navigator.clipboard.writeText(url);
  const st = document.getElementById('copyStatus');
  st.classList.add('show');
  setTimeout(() => st.classList.remove('show'), 2000);
}

// ── THEME ──────────────────────────────────────────
function toggleTheme() {
  const html = document.documentElement;
  const goLight = html.dataset.theme !== 'light';
  html.dataset.theme = goLight ? 'light' : 'dark';
  document.getElementById('themeToggle').textContent = goLight ? '☾ Dark' : '☀ Light';
  localStorage.setItem('fabulaUltimaTheme', html.dataset.theme);
}

// Auto-save every 30s
setInterval(() => saveSheet(true), 30000);

init();