// ═══════════════════════════════════════════════════════════════════════
// UI OVERLAYS — cooldowns, durations, alerts, monster numbers, monster HP
// ═══════════════════════════════════════════════════════════════════════

function updateCooldownDisplay() {
    if (!CFG.showCooldowns) return;
    $$('.hv-cd-overlay').forEach(e => e.remove());
    $$('.btqb').forEach(el => {
        const img = el.querySelector('img');
        if (!img) return;
        const src = (img.src || '').toLowerCase();
        for (const [k, v] of Object.entries(STATE.cooldowns)) {
            if (v <= 0) continue;
            if (src.includes(k.toLowerCase()) || src.includes(k.replace(/_/g, ''))) {
                const o = document.createElement('div');
                o.className = 'hv-cd-overlay';
                o.style.cssText = 'position:absolute;top:0;right:0;background:rgba(0,0,0,0.7);color:#f00;font-size:9px;font-weight:bold;padding:0 2px;border-radius:2px;pointer-events:none';
                o.textContent = v;
                el.style.position = 'relative';
                el.appendChild(o);
                break;
            }
        }
    });
}

function updateDurationDisplay() {
    if (!CFG.showDurations) return;
    $$('.hv-dur-overlay').forEach(e => e.remove());
    const pane = document.getElementById('pane_effects');
    if (!pane) return;
    $$('img[onmouseover]', pane).forEach(img => {
        const omo = img.getAttribute('onmouseover') || '';
        const dur = omo.match(/(\d+)\s*turns?\s*rem/);
        if (!dur) return;
        const t = parseInt(dur[1]);
        const st = omo.match(/(\d+)\s*stacks?/i);
        const o = document.createElement('div');
        o.className = 'hv-dur-overlay';
        o.style.cssText = `position:absolute;bottom:-2px;left:50%;transform:translateX(-50%);background:${t < 3 ? '#f44' : '#44f'};color:#fff;font-size:8px;font-weight:bold;padding:0 2px;border-radius:2px;pointer-events:none;z-index:1`;
        o.textContent = st ? `${t}x${parseInt(st[1])}` : t;
        img.parentElement.style.position = 'relative';
        img.parentElement.appendChild(o);
    });
}

function updateAlertColours() {
    if (!CFG.alertColours) return;
    let bg = '#EDEBDF';
    STATE.interruptAlert = false;

    if (!$('img[src$="bar_dgreen.png"]') && $('img[src$="fallenshield.png"]')) {
        bg = 'magenta';
        STATE.interruptAlert = true;
    } else if (STATE.hp < 0.25) {
        bg = '#ff4488';
        STATE.interruptAlert = true;
    } else if (STATE.mp < 0.15) {
        bg = '#4444aa';
    } else if (Object.values(STATE.buffs).some(d => d < 2 && d > 0)) {
        bg = '#88ccff';
    }

    const v = document.getElementById('pane_vitals');
    if (v) v.style.background = bg;
}

function addMonsterNumbers() {
    if (!CFG.showMonsterNumbers) return;
    STATE.monsters.forEach((m, i) => {
        if (!m || !m.querySelector || m.querySelector('.hv-monster-num')) return;
        const b = m.querySelector('.btm1');
        if (!b) return;
        const s = document.createElement('span');
        s.className = 'hv-monster-num';
        s.style.cssText = 'font-weight:bold;margin-right:3px;color:#999';
        s.textContent = (i + 1);
        b.insertBefore(s, b.firstChild);
    });
}

function updateMonsterHPDisplay() {
    if (!CFG.showMonsterHP) return;
    STATE.monsters.forEach((m, i) => {
        if (!m || !m.hasAttribute || !m.hasAttribute('onclick')) return;
        const n = m.querySelector('.btm1');
        if (!n) return;
        const nm = (n.textContent || '').replace(/^\d+\s*/, '').trim();
        const md = STATE.monsterData[nm];
        if (!md || !md.hp || md.seen < 3) return;
        const hpBar = m.querySelector('img[src$="nbargreen.png"]');
        if (!hpBar) return;
        const r = clamp(parseInt(hpBar.style.width || '') / 120, 0.01, 1);
        const txt = `HP: ${Math.max(1, Math.round(r * md.hp)).toLocaleString()} / ${md.hp.toLocaleString()}`;
        const ex = m.querySelector('.hv-monster-hp');
        if (ex) { ex.textContent = txt; return; }
        const d = document.createElement('div');
        d.className = 'hv-monster-hp';
        d.style.cssText = 'display:inline-block;position:relative;left:204px;top:-20px;font-size:9px;color:#888';
        d.textContent = txt;
        m.appendChild(d);
    });
}

function saveMonsterData() {
    STATE.monsters.forEach((m, i) => {
        if (!m || !m.hasAttribute || !m.hasAttribute('onclick')) return;
        const n = m.querySelector('.btm1');
        if (!n) return;
        const nm = (n.textContent || '').replace(/^\d+\s*/, '').trim();
        if (!nm) return;
        const hpBar = m.querySelector('img[src$="nbargreen.png"]');
        if (hpBar) {
            const r = clamp(parseInt(hpBar.style.width || '') / 120, 0.01, 1);
            if (!STATE.monsterData[nm]) STATE.monsterData[nm] = { hp: 0, seen: 0 };
            STATE.monsterData[nm].hp = Math.max(
                STATE.monsterData[nm].hp,
                Math.round(STATE.monsterData[nm].hp * 0.7 + 1000 / r * 0.3)
            );
            STATE.monsterData[nm].seen++;
        }
    });
    try { localStorage[SP + 'monsters'] = JSON.stringify(STATE.monsterData); } catch (e) {}
}

function refreshUI() {
    if (CFG.showDurations) updateDurationDisplay();
    if (CFG.showCooldowns) updateCooldownDisplay();
    if (CFG.alertColours) updateAlertColours();
    if (CFG.showMonsterNumbers) addMonsterNumbers();
    if (CFG.showMonsterHP) updateMonsterHPDisplay();
}