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<!DOCTYPE html>
<html lang="de">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>MedMan</title>
<style>
:root {
    --bg: #0f0f1a; --surface: #181825; --surface2: #1e1e2e;
    --border: #313244; --text: #cdd6f4; --text2: #a6adc8;
    --accent: #89b4fa; --red: #f38ba8; --green: #a6e3a1;
    --yellow: #f9e2af; --purple: #cba6f7;
}
* { margin:0; padding:0; box-sizing:border-box; }
body { font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif; background:var(--bg); color:var(--text); min-height:100vh; display:flex; flex-direction:column; }
header { background:var(--surface); border-bottom:1px solid var(--border); padding:8px 16px; display:flex; align-items:center; gap:8px; flex-wrap:wrap; position:sticky; top:0; z-index:100; }
header h1 { font-size:1.1rem; font-weight:700; white-space:nowrap; color:var(--accent); margin-right:auto; }
header button, header .btn { background:var(--surface2); color:var(--text); border:1px solid var(--border); border-radius:5px; padding:4px 10px; cursor:pointer; font-size:0.75rem; white-space:nowrap; }
header button:hover { background:var(--border); }
.btn-a { background:var(--accent)!important; color:#000!important; border-color:var(--accent)!important; font-weight:600; }
.btn-a:hover { filter:brightness(1.1); }
.btn-g { background:var(--green)!important; color:#000!important; border-color:var(--green)!important; font-weight:600; }
.btn-g:hover { filter:brightness(1.1); }
#sel-bar { display:none; align-items:center; gap:6px; padding:4px 16px; background:var(--accent); color:#000; font-size:0.75rem; font-weight:600; }
#sel-bar.on { display:flex; }
#sel-bar button { background:rgba(0,0,0,0.2); color:#000; border:none; border-radius:4px; padding:3px 8px; cursor:pointer; font-size:0.7rem; font-weight:600; }
#sel-bar button:hover { background:rgba(0,0,0,0.35); }

#up-area { display:none; padding:8px 16px; background:var(--surface); border-bottom:1px solid var(--border); }
#up-area.on { display:flex; align-items:center; gap:8px; flex-wrap:wrap; }
#up-area input[type=file] { color:var(--text2); font-size:0.75rem; }
#up-area .prog { color:var(--accent); font-size:0.75rem; }

main { flex:1; display:flex; overflow:hidden; }
#side { width:240px; background:var(--surface); border-right:1px solid var(--border); padding:10px; overflow-y:auto; flex-shrink:0; display:flex; flex-direction:column; gap:6px; }

.section { border:1px solid var(--border); border-radius:7px; overflow:hidden; }
.sec-h { display:flex; align-items:center; justify-content:space-between; padding:7px 10px; background:var(--surface2); cursor:pointer; user-select:none; }
.sec-h:hover { background:var(--border); }
.sec-h .t { font-size:0.72rem; font-weight:600; text-transform:uppercase; letter-spacing:0.04em; color:var(--text2); }
.sec-h .arr { font-size:0.65rem; transition:transform 0.2s; color:var(--text2); }
.sec-h.open .arr { transform:rotate(90deg); }
.sec-b { display:none; padding:8px; }
.sec-b.on { display:block; }

#tag-list { display:flex; flex-wrap:wrap; gap:3px; }
.tc { display:inline-flex; align-items:center; gap:3px; padding:2px 7px; border-radius:999px; font-size:0.72rem; cursor:pointer; transition:all 0.15s; border:1px solid var(--border); user-select:none; background:var(--surface2); color:var(--text); }
.tc:hover { border-color:var(--accent); }
.tc.sel { border-color:#fff; background:var(--accent); color:#000; }
.tc .rm { font-size:0.6rem; opacity:0.4; cursor:pointer; margin-left:1px; }
.tc .rm:hover { opacity:1; }
.ti-row { display:flex; gap:3px; margin-top:6px; }
.ti-row input { flex:1; background:var(--bg); border:1px solid var(--border); border-radius:4px; padding:4px 6px; color:var(--text); font-size:0.72rem; }
.ti-row button { background:var(--accent); color:#000; border:none; border-radius:4px; padding:4px 8px; cursor:pointer; font-weight:600; font-size:0.72rem; }

#si-row { margin-bottom:6px; }
#si-row input { width:100%; background:var(--bg); border:1px solid var(--border); border-radius:4px; padding:4px 6px; color:var(--text); font-size:0.72rem; }
#suggestions { display:flex; flex-wrap:wrap; gap:3px; margin-bottom:4px; }
#suggestions .tc { cursor:pointer; opacity:0.7; }
#suggestions .tc:hover { opacity:1; border-color:var(--accent); }

.srch-acts { display:flex; flex-direction:column; gap:3px; margin-top:4px; }
.srch-acts button { border:none; border-radius:4px; padding:3px 8px; cursor:pointer; font-weight:600; font-size:0.68rem; color:#000; }
.srch-acts .s { background:var(--green); }
.srch-acts .c { background:var(--red); }

.sel-acts { display:flex; flex-direction:column; gap:3px; }
.sel-acts button { background:var(--surface2); color:var(--text2); border:1px solid var(--border); border-radius:4px; padding:3px 8px; cursor:pointer; font-size:0.68rem; text-align:left; }
.sel-acts button:hover { color:var(--text); border-color:var(--accent); }

#dd-info { font-size:0.62rem; color:var(--text2); }
#dd-info .dd { margin:1px 0; }

#content { flex:1; overflow-y:auto; padding:12px; }
#grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(170px,1fr)); gap:8px; }
.card { background:var(--surface); border:1px solid var(--border); border-radius:7px; overflow:hidden; transition:all 0.15s; cursor:pointer; position:relative; }
.card:hover { border-color:var(--accent); transform:translateY(-1px); }
.card.sel { border-color:var(--accent); box-shadow:0 0 0 2px var(--accent); }
.card .th { width:100%; aspect-ratio:4/3; object-fit:cover; background:var(--surface2); display:flex; align-items:center; justify-content:center; font-size:1.6rem; }
.card .th img { width:100%; height:100%; object-fit:cover; }
.card .info { padding:6px 7px; }
.card .hash { font-size:0.65rem; font-weight:500; word-break:break-all; line-height:1.2; font-family:monospace; display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; color:var(--accent); }
.card .meta { font-size:0.58rem; color:var(--text2); margin-top:1px; }
.card .badge { position:absolute; top:4px; right:4px; background:rgba(0,0,0,0.75); color:var(--text); padding:1px 5px; border-radius:3px; font-size:0.5rem; text-transform:uppercase; letter-spacing:0.03em; }
.card .ct { display:flex; flex-wrap:wrap; gap:2px; padding:0 7px 4px; }
.card .ct .mt { font-size:0.5rem; padding:1px 4px; border-radius:999px; background:var(--surface2); color:var(--text2); }
.card .chk { position:absolute; top:4px; left:4px; width:18px; height:18px; border-radius:4px; border:2px solid rgba(255,255,255,0.4); background:rgba(0,0,0,0.5); display:flex; align-items:center; justify-content:center; font-size:0.6rem; color:#fff; cursor:pointer; z-index:5; }
.card.sel .chk { background:var(--accent); border-color:var(--accent); }

#pg { display:flex; justify-content:center; align-items:center; gap:6px; margin-top:12px; }
#pg button { background:var(--surface); color:var(--text); border:1px solid var(--border); padding:3px 10px; border-radius:4px; cursor:pointer; font-size:0.7rem; }
#pg button:hover { border-color:var(--accent); }
#pg span { font-size:0.7rem; color:var(--text2); }

.status { position:fixed; bottom:16px; right:16px; background:var(--surface2); border:1px solid var(--border); padding:8px 14px; border-radius:6px; font-size:0.75rem; z-index:300; opacity:0; transition:opacity 0.2s; pointer-events:none; }
.status.on { opacity:1; }

.modal { display:none; position:fixed; inset:0; z-index:200; background:rgba(0,0,0,0.82); align-items:center; justify-content:center; }
.modal.on { display:flex; }
.mc { background:var(--surface); border:1px solid var(--border); border-radius:10px; max-width:90vw; max-height:90vh; overflow-y:auto; padding:18px; min-width:340px; position:relative; }
.mc .cb { position:absolute; top:5px; right:9px; background:none; border:none; color:var(--text); font-size:1.2rem; cursor:pointer; }
.mc img, .mc video { max-width:100%; max-height:48vh; border-radius:6px; display:block; margin:0 auto; }
.mc h2 { margin-bottom:6px; font-size:0.8rem; word-break:break-all; font-family:monospace; color:var(--accent); }
.mc .ft { display:flex; flex-wrap:wrap; gap:3px; margin-top:6px; }
.mc .mrow { margin-top:5px; font-size:0.68rem; color:var(--text2); }
.mc .ar { margin-top:8px; display:flex; gap:4px; flex-wrap:wrap; }
.mc select, .mc input { background:var(--surface2); color:var(--text); border:1px solid var(--border); border-radius:3px; padding:3px 6px; font-size:0.72rem; }
.mc button.act { background:var(--accent); color:#000; border:none; border-radius:3px; padding:3px 8px; cursor:pointer; font-weight:600; font-size:0.7rem; }
.mc button.act:hover { filter:brightness(1.1); }
.mc button.dng { background:var(--red); }

.mc .nav-row { display:flex; align-items:center; gap:6px; margin-top:12px; padding-top:8px; border-top:1px solid var(--border); }
.mc .nav-row button { flex:1; background:var(--surface2); color:var(--text); border:1px solid var(--border); border-radius:4px; padding:5px 10px; cursor:pointer; font-size:0.7rem; }
.mc .nav-row button:hover { border-color:var(--accent); }
.mc .nav-row button:disabled { opacity:0.3; cursor:default; }
.mc .nav-row span { font-size:0.62rem; color:var(--text2); white-space:nowrap; min-width:60px; text-align:center; }
</style>
</head>
<body>
<header>
    <h1>🧩 MedMan</h1>
    <button id="b-up" class="btn-a">📤 Upload</button>
    <button id="b-scan" class="btn-g">🔄 Quellen scannen</button>
    <button id="b-exp">📦 Export</button>
    <label class="btn" style="cursor:pointer;">📥 Import <input type="file" id="f-imp" accept=".json" style="display:none;"></label>
</header>

<div id="sel-bar">
    <span id="sel-n">0 ausgewählt</span>
    <button id="sel-tag-btn">🏷 Tags</button>
    <button id="sel-mv-btn">📁 Verschieben</button>
    <button id="sel-del-btn" style="background:rgba(180,0,0,0.4)">🗑 Löschen</button>
    <button id="sel-clr-btn">✕</button>
</div>

<div id="up-area">
    <input type="file" id="up-in" multiple>
    <button id="up-go" class="btn-a">Hochladen</button>
    <span class="prog" id="up-prog"></span>
    <button id="up-cancel">Abbrechen</button>
</div>

<main>
    <aside id="side">

        <!-- Tags section -->
        <div class="section" id="sec-tags">
            <div class="sec-h open" data-sec="tags"><span class="t">🏷 Tags</span><span class="arr">▶</span></div>
            <div class="sec-b on" id="secb-tags">
                <div id="tag-list"></div>
                <div class="ti-row">
                    <input id="ti-in" type="text" placeholder="Neuer Tag..." maxlength="50">
                    <button id="ti-btn">+</button>
                </div>
            </div>
        </div>

        <!-- Search section -->
        <div class="section" id="sec-search">
            <div class="sec-h" data-sec="search"><span class="t">🔍 Suche</span><span class="arr">▶</span></div>
            <div class="sec-b" id="secb-search">
                <div id="si-row">
                    <input id="si-in" type="text" placeholder="Tag-Suche (Substring)..." autocomplete="off">
                </div>
                <div id="suggestions"></div>
                <div style="font-size:0.62rem;color:var(--text2);margin:2px 0;">Ausgewählte Tags:</div>
                <div id="search-tags"></div>
                <div class="srch-acts">
                    <button class="s" id="b-search">🔍 Dateien finden</button>
                    <button class="c" id="b-clear">✕ Suche löschen</button>
                </div>
            </div>
        </div>

        <!-- Selection section -->
        <div class="section" id="sec-sel">
            <div class="sec-h" data-sec="sel"><span class="t">☑ Auswahl</span><span class="arr">▶</span></div>
            <div class="sec-b" id="secb-sel">
                <div style="font-size:0.65rem;color:var(--text2);margin-bottom:4px;" id="sel-info">Keine Auswahl</div>
                <div class="sel-acts">
                    <button id="b-sel-all">✅ Alle auswählen</button>
                    <button id="b-sel-tag">🏷 Tags zuweisen</button>
                    <button id="b-sel-untag">🚫 Tags entfernen</button>
                    <button id="b-sel-mv">📁 Verschieben</button>
                    <button id="b-sel-del" style="color:var(--red)">🗑 Löschen</button>
                    <button id="b-sel-clr">✕ Auswahl aufheben</button>
                </div>
            </div>
        </div>

        <!-- Data dirs section -->
        <div class="section">
            <div class="sec-h open" data-sec="dd"><span class="t">📊 Daten</span><span class="arr">▶</span></div>
            <div class="sec-b on" id="secb-dd">
                <div id="dd-info">Lade...</div>
                <div style="font-size:0.58rem;color:var(--text2);margin-top:6px;">
                    <a href="/api/tags/export" target="_blank" style="color:var(--accent)">Roh-Export (JSON)</a>
                </div>
            </div>
        </div>
    </aside>

    <section id="content">
        <div id="grid"></div>
        <div id="empty" style="color:var(--text2);text-align:center;padding:40px;display:none;">Keine Dateien gefunden.</div>
        <div id="pg"></div>
    </section>
</main>

<div class="status" id="status"></div>
<div class="modal" id="prev-modal"><div class="mc"><button class="cb" id="m-close">&times;</button><div id="m-body"></div></div></div>
<div class="modal" id="conf-modal"><div class="mc" style="min-width:260px;text-align:center;"><p id="conf-msg"></p><button id="conf-yes" style="background:var(--red);color:#fff;border:none;padding:6px 16px;border-radius:4px;margin:6px;cursor:pointer;">Ja</button><button id="conf-no" style="background:var(--border);color:var(--text);border:none;padding:6px 16px;border-radius:4px;margin:6px;cursor:pointer;">Nein</button></div></div>

<script>
const S = {files:[],disp:[],page:0,ps:50,sel:new Set(),tags:[],stags:[],sm:false,ph:null,_navKd:null};

function st(msg){let e=document.getElementById('status');e.textContent=msg;e.classList.add('on');clearTimeout(e._t);e._t=setTimeout(()=>e.classList.remove('on'),2200);}
async function api(u,o={}){let r=await fetch(u,o);if(!r.ok){let e=await r.json().catch(()=>({error:r.statusText}));throw new Error(e.error||r.statusText);}return r.json();}

// --- Section toggling ---
document.querySelectorAll('.sec-h').forEach(h=>{
    h.addEventListener('click',()=>{
        let sec=h.dataset.sec, b=document.getElementById('secb-'+sec);
        h.classList.toggle('open'); b.classList.toggle('on');
    });
});

// --- Tags ---
async function lt(){S.tags=await api('/api/tags');rTagList();rSearchSuggestions('');}
function rTagList(){
    let l=document.getElementById('tag-list');
    l.innerHTML=S.tags.map(t=>{
        let sel=S.stags.includes(t.name)?'sel':'';
        return `<span class="tc ${sel}" data-tag="${t.name}">${t.name}<span class="rm" data-tid="${t.id}">&times;</span></span>`;
    }).join('');
    l.querySelectorAll('.tc').forEach(c=>{c.addEventListener('click',e=>{
        if(e.target.classList.contains('rm'))return;
        toggleSearchTag(c.dataset.tag);
    });});
    l.querySelectorAll('.rm').forEach(b=>{b.addEventListener('click',async e=>{
        e.stopPropagation(); await api(`/api/tags/${b.dataset.tid}`,{method:'DELETE'}); await lt(); if(S.files.length) await lf(); st('Tag gelöscht');
    });});
}

function toggleSearchTag(name){
    let i=S.stags.indexOf(name);
    if(i>=0) S.stags.splice(i,1); else S.stags.push(name);
    rTagList(); rSearchTags();
}

// --- Search ---
function rSearchTags(){
    document.getElementById('search-tags').innerHTML=S.stags.map(n=>
        `<span class="tc sel">${n}<span class="rm" data-rm="${n}">&times;</span></span>`
    ).join('');
    document.querySelectorAll('#search-tags .rm').forEach(b=>{b.addEventListener('click',e=>{
        e.stopPropagation(); S.stags=S.stags.filter(x=>x!==b.dataset.rm); rTagList(); rSearchTags();
    });});
}

function rSearchSuggestions(q){
    let el=document.getElementById('suggestions');
    if(!q){el.innerHTML='';return;}
    let re=new RegExp(q.replace(/[.*+?^${}()|[\]\\]/g,'\\$&'),'i');
    let matches=S.tags.filter(t=>re.test(t.name)&&!S.stags.includes(t.name)).slice(0,12);
    el.innerHTML=matches.map(t=>`<span class="tc" data-tag="${t.name}">${t.name}</span>`).join('');
    el.querySelectorAll('.tc').forEach(c=>{c.addEventListener('click',()=>{
        S.stags.push(c.dataset.tag); rTagList(); rSearchTags(); rSearchSuggestions('');
        document.getElementById('si-in').value='';
    });});
}

document.getElementById('si-in').addEventListener('input',function(){rSearchSuggestions(this.value.trim());});

document.getElementById('b-search').addEventListener('click',()=>{
    if(!S.stags.length){st('Keine Tags ausgewählt');return;}
    S.sm=true; let t=S.stags.join(',');
    api(`/api/search?tags=${encodeURIComponent(t)}`).then(d=>{S.files=d;S.page=0;rGrid();}).catch(e=>{st('Suche fehlgeschlagen');S.files=[];rGrid();});
});
document.getElementById('b-clear').addEventListener('click',()=>{S.sm=false;S.stags=[];S.page=0;rTagList();rSearchTags();lf();});

// --- Tag create ---
document.getElementById('ti-btn').addEventListener('click',async()=>{
    let i=document.getElementById('ti-in'),n=i.value.trim(); if(!n)return;
    await api('/api/tags',{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify({name:n})});
    i.value=''; await lt(); st('Tag erstellt');
});
document.getElementById('ti-in').addEventListener('keydown',e=>{if(e.key==='Enter')document.getElementById('ti-btn').click();});

// --- Files ---
async function lf(tf=null){let u='/api/files'+(tf?`?tag=${encodeURIComponent(tf)}`:'');S.files=await api(u);S.page=0;rGrid();}

function rGrid(){
    let s=S.page*S.ps; S.disp=S.files.slice(s,s+S.ps);
    let g=document.getElementById('grid'),e=document.getElementById('empty');
    if(!S.files.length){g.innerHTML='';e.style.display='block';document.getElementById('pg').innerHTML='';updateSelUI();return;}
    e.style.display='none';
    g.innerHTML=S.disp.map(f=>{
        let sel=S.sel.has(f.hash)?'sel':'',mt=f.mt||'other',
            tg=(f.tags||[]).map(t=>`<span class="mt">${t.name}</span>`).join(''),
            sz=fs(f.size), ico={video:'🎬',image:'🖼️',audio:'🎵',doc:'📄',other:'📁'}[mt]||'📁',
            ts=mt==='audio'?ico:`<img src="/thumb/${f.hash}" loading="lazy" alt="">`;
        return `<div class="card ${sel}" data-hash="${f.hash}">
            <div class="chk">✓</div>
            <div class="th">${ts}</div><div class="badge">${mt}</div>
            <div class="info"><div class="hash" title="${f.hash}">${f.hash}</div><div class="meta">${sz} · DD${f.didx}</div></div>
            <div class="ct">${tg}</div></div>`;
    }).join('');
    g.querySelectorAll('.card').forEach(c=>{
        c.addEventListener('click',e=>{
            let h=c.dataset.hash;
            if(e.ctrlKey||e.metaKey){toggleSel(h,c);return;}
            // If the click was on the checkbox itself: toggle selection, don't open
            if(e.target.classList.contains('chk')||e.target.closest('.chk')){
                toggleSel(h,c); e.stopPropagation(); return;
            }
            op(h);
        });
    });
    let tp=Math.ceil(S.files.length/S.ps);
    document.getElementById('pg').innerHTML=tp<=1?'':`<button onclick="S.page=Math.max(0,S.page-1);rGrid();" ${S.page===0?'disabled':''}>←</button><span>${S.page+1}/${tp}</span><button onclick="S.page=Math.min(${tp-1},S.page+1);rGrid();" ${S.page>=tp-1?'disabled':''}>→</button>`;
    updateSelUI();
}

function fs(b){if(!b)return'';if(b<1024)return b+' B';if(b<1048576)return (b/1024).toFixed(1)+' KB';if(b<1073741824)return (b/1048576).toFixed(1)+' MB';return (b/1073741824).toFixed(1)+' GB';}

// --- Selection ---
function toggleSel(h,cardEl){
    if(S.sel.has(h)){S.sel.delete(h);if(cardEl)cardEl.classList.remove('sel');}
    else{S.sel.add(h);if(cardEl)cardEl.classList.add('sel');}
    updateSelUI();
}
function updateSelUI(){
    let n=S.sel.size;
    document.getElementById('sel-n').textContent=n+' ausgewählt';
    document.getElementById('sel-bar').classList.toggle('on',n>0);
    document.getElementById('sel-info').textContent=n?n+' Dateien ausgewählt':'Keine Auswahl';
}
function clearSel(){S.sel.clear();updateSelUI();rGrid();}
function selAll(){let pageStart=S.page*S.ps;for(let f of S.disp){S.sel.add(f.hash);}updateSelUI();rGrid();}

// --- Navigation helpers ---
function _clearNavKd(){
    if(S._navKd){document.removeEventListener('keydown',S._navKd);S._navKd=null;}
}
function opNav(delta){
    if(!S.ph)return; let idx=S.files.findIndex(x=>x.hash===S.ph); if(idx<0)return;
    let nidx=idx+delta; if(nidx<0||nidx>=S.files.length)return;
    let page=Math.floor(nidx/S.ps);
    if(page!==S.page){S.page=page;rGrid();}
    op(S.files[nidx].hash);
}

// --- Selection actions ---
async function selTag(){
    if(!S.sel.size){st('Keine Dateien ausgewählt');return;}
    let opts=S.tags.map(t=>`<option value="${t.id}">${t.name}</option>`).join('');
    document.getElementById('m-body').innerHTML=
        `<h3>${S.sel.size} Dateien: Tag zuweisen</h3>
        <select id="stag-sel" style="width:100%;margin-top:6px;"><option value="">-- Tag wählen --</option>${opts}</select>
        <div style="margin-top:6px;"><button class="act" id="stag-go">Zuweisen</button></div>`;
    document.getElementById('prev-modal').classList.add('on');
    document.getElementById('stag-go').onclick=async()=>{
        let s=document.getElementById('stag-sel'); if(!s.value)return;
        let tid=parseInt(s.value),c=0;
        for(let h of[...S.sel]){try{await api(`/api/files/${h}/tags`,{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify({tid})});c++;}catch(e){}}
        document.getElementById('prev-modal').classList.remove('on'); st(`${c} getaggt`); await lf(S.sm?S.stags[0]:null);
    };
}

async function selUntag(){
    if(!S.sel.size){st('Keine Dateien ausgewählt');return;}
    let allTids=new Map();
    let promises=[...S.sel].map(h=>api(`/api/files/${h}/tags`));
    let results=await Promise.allSettled(promises);
    for(let r of results){if(r.status==='fulfilled'){for(let t of r.value){allTids.set(t.id,t.name);}}}
    if(!allTids.size){st('Keine Tags auf der Auswahl');return;}
    let opts=[...allTids.entries()].map(([id,name])=>`<option value="${id}">${name}</option>`).join('');
    document.getElementById('m-body').innerHTML=
        `<h3>${S.sel.size} Dateien: Tag entfernen</h3>
        <select id="suntag-sel" style="width:100%;margin-top:6px;"><option value="">-- Tag wählen --</option>${opts}</select>
        <div style="margin-top:6px;"><button class="act dng" id="suntag-go">Entfernen</button></div>`;
    document.getElementById('prev-modal').classList.add('on');
    document.getElementById('suntag-go').onclick=async()=>{
        let s=document.getElementById('suntag-sel'); if(!s.value)return;
        let tid=parseInt(s.value),c=0;
        for(let h of[...S.sel]){try{await api(`/api/files/${h}/tags/${tid}`,{method:'DELETE'});c++;}catch(e){}}
        document.getElementById('prev-modal').classList.remove('on'); st(`${c} Tags entfernt`); await lf(S.sm?S.stags[0]:null);
    };
}

async function selMove(){
    if(!S.sel.size){st('Keine Dateien ausgewählt');return;}
    let dd=await api('/api/dat'),opts=dd.dat.map(d=>`<option value="${d.i}">DD${d.i} (${d.path})</option>`).join('');
    document.getElementById('m-body').innerHTML=
        `<h3>${S.sel.size} Dateien verschieben</h3>
        <select id="smv-sel" style="width:100%;margin-top:6px;"><option value="">-- Ziel --</option>${opts}</select>
        <div style="margin-top:6px;"><button class="act" id="smv-go">Verschieben</button></div>`;
    document.getElementById('prev-modal').classList.add('on');
    document.getElementById('smv-go').onclick=async()=>{
        let s=document.getElementById('smv-sel'); if(!s.value)return;
        let ti=parseInt(s.value),c=0;
        for(let h of[...S.sel]){try{await api(`/api/files/${h}/move`,{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify({didx:ti})});c++;}catch(e){}}
        document.getElementById('prev-modal').classList.remove('on'); clearSel(); st(`${c} verschoben`); await lf(S.sm?S.stags[0]:null);
    };
}

async function selDel(){
    if(!S.sel.size){st('Keine Dateien ausgewählt');return;}
    sc(`${S.sel.size} Dateien wirklich löschen?`,async()=>{
        let c=0; for(let h of[...S.sel]){try{await api(`/api/files/${h}`,{method:'DELETE'});c++;}catch(e){}}
        clearSel(); st(`${c} gelöscht`); await lf(S.sm?S.stags[0]:null);
    });
}

function sc(msg,cb){document.getElementById('conf-msg').textContent=msg;document.getElementById('conf-modal').classList.add('on');document.getElementById('conf-yes').onclick=()=>{document.getElementById('conf-modal').classList.remove('on');cb();};}

// --- Single file preview ---
async function op(h){
    _clearNavKd();
    S.ph=h; let f=S.files.find(x=>x.hash===h); if(!f)return;
    let ft=await api(`/api/files/${h}/tags`),dd=await api('/api/dat'),
        ht=`<h2>${h}</h2>`,mt=f.mt||'other';
    if(mt==='image')ht+=`<img src="/raw/${h}" alt="">`;
    else if(mt==='video')ht+=`<video controls src="/raw/${h}" style="max-width:100%;max-height:48vh;"></video>`;
    else if(mt==='audio')ht+=`<audio controls src="/raw/${h}" style="width:100%;"></audio>`;
    else ht+=`<p style="color:var(--text2)">Keine Vorschau</p>`;
    ht+=`<div class="mrow">Typ: ${mt} · Größe: ${fs(f.size)} · DD${f.didx}<br>${f.w&&f.h?`${f.w}×${f.h} · `:''}${f.dur?parseFloat(f.dur).toFixed(1)+'s · ':''}${f.ts||''}</div>`;
    ht+=`<div class="ft">`;
    for(let t of ft)ht+=`<span class="tc" style="background:var(--surface2)">${t.name}<span class="rm" data-tid="${t.id}" data-hash="${h}">&times;</span></span>`;
    ht+=`</div>`;
    ht+=`<div class="ar"><select id="ats"><option value="">-- Tag hinzufügen --</option>`;
    for(let t of S.tags)if(!ft.some(x=>x.id===t.id))ht+=`<option value="${t.id}">${t.name}</option>`;
    ht+=`</select><button class="act" id="atb">+</button></div>`;
    ht+=`<div class="ar"><select id="mds"><option value="">-- Verschieben nach --</option>`;
    for(let d of dd.dat)if(d.i!==f.didx)ht+=`<option value="${d.i}">DD${d.i}</option>`;
    ht+=`</select><button class="act" id="mvb">Verschieben</button></div>`;
    ht+=`<div class="ar"><button class="act dng" id="delb">🗑 Löschen</button></div>`;
    ht+=`<p style="margin-top:6px;font-size:0.6rem;"><a href="/raw/${h}" target="_blank" style="color:var(--accent)">Direktlink</a></p>`;

    // ── Prev / Next navigation row ────────────────────────────────────
    let idx=S.files.findIndex(x=>x.hash===h);
    let hasPrev=idx>0, hasNext=idx>=0 && idx<S.files.length-1;
    let prevLabel=hasPrev?`← ${S.files[idx-1].hash.slice(0,8)}…`:'← ──';
    let nextLabel=hasNext?`${S.files[idx+1].hash.slice(0,8)}… →`:'── →';
    ht+=`<div class="nav-row">
        <button id="nav-prev" ${hasPrev?'':'disabled'}>${prevLabel}</button>
        <span>${idx+1} / ${S.files.length}</span>
        <button id="nav-next" ${hasNext?'':'disabled'}>${nextLabel}</button>
    </div>`;

    document.getElementById('m-body').innerHTML=ht; document.getElementById('prev-modal').classList.add('on');

    // Prev / Next button handlers
    let np=document.getElementById('nav-prev'), nn=document.getElementById('nav-next');
    if(np)np.onclick=e=>{e.stopPropagation();opNav(-1);};
    if(nn)nn.onclick=e=>{e.stopPropagation();opNav(1);};

    // Keyboard left/right navigation while modal is open
    S._navKd=(e)=>{
        if(e.key==='ArrowLeft'){e.preventDefault();opNav(-1);}
        else if(e.key==='ArrowRight'){e.preventDefault();opNav(1);}
    };
    document.addEventListener('keydown',S._navKd);

    let ab=document.getElementById('atb'); if(ab)ab.onclick=async()=>{
        let s=document.getElementById('ats'); if(!s.value)return;
        await api(`/api/files/${h}/tags`,{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify({tid:parseInt(s.value)})});
        st('Tag hinzugefügt'); await lf(S.sm?S.stags[0]:null); op(h);};
    let mb=document.getElementById('mvb'); if(mb)mb.onclick=async()=>{
        let s=document.getElementById('mds'); if(!s.value)return;
        await api(`/api/files/${h}/move`,{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify({didx:parseInt(s.value)})});
        st('Verschoben'); await lf(S.sm?S.stags[0]:null); op(h);};
    let db=document.getElementById('delb'); if(db)db.onclick=()=>{
        sc(`Diese Datei wirklich löschen?`,async()=>{await api(`/api/files/${h}`,{method:'DELETE'}); st('Gelöscht'); S.sel.delete(h); document.getElementById('prev-modal').classList.remove('on'); await lf(S.sm?S.stags[0]:null);});};
    document.querySelectorAll('#m-body .rm').forEach(b=>{b.onclick=async e=>{e.stopPropagation();
        await api(`/api/files/${h}/tags/${b.dataset.tid}`,{method:'DELETE'}); st('Tag entfernt'); await lf(S.sm?S.stags[0]:null); op(h);};});
}

// --- Data dirs ---
async function ldd(){let d=await api('/api/dat');document.getElementById('dd-info').innerHTML=d.dat.map(x=>`<div class="dd" style="margin-bottom:4px;"><strong>DD${x.i}</strong> (${(x.w*100).toFixed(0)}%)<br>${x.n} Dateien, ${(x.bytes/(1024*1024*1024)).toFixed(1)} GB<br><span style="opacity:0.5;word-break:break-all;font-size:0.55rem;">${x.path}</span></div>`).join('')+(d.src.length?`<div style="margin-top:6px;"><strong>Quellen:</strong><br>${d.src.map(s=>'<span style="opacity:0.5;font-size:0.55rem;">'+s+'</span>').join('<br>')}</div>`:'');}

// --- Header buttons ---
document.getElementById('b-up').addEventListener('click',()=>document.getElementById('up-area').classList.toggle('on'));
document.getElementById('up-cancel').addEventListener('click',()=>document.getElementById('up-area').classList.remove('on'));
document.getElementById('up-go').addEventListener('click',async()=>{
    let i=document.getElementById('up-in'),p=document.getElementById('up-prog'); if(!i.files.length)return;
    let fd=new FormData(); for(let f of i.files)fd.append('file',f);
    p.textContent=`Lade ${i.files.length} Datei(en)...`;
    try{let r=await fetch('/api/upload',{method:'POST',body:fd}),d=await r.json(),ok=d.results.filter(x=>x.status==='ok').length;
        p.textContent=`${ok} von ${d.results.length} hochgeladen.`; i.value=''; await lf(); await ldd();
        setTimeout(()=>p.textContent='',3000);}catch(e){p.textContent='Fehler: '+e.message;}
});
document.getElementById('b-scan').addEventListener('click',async()=>{st('Scanne...');let r=await api('/api/scan',{method:'POST'});st(`Scan: ${r.ingested} neu`);await lf();await ldd();});
document.getElementById('b-exp').addEventListener('click',async()=>{
    let d=await api('/api/tags/export'),bl=new Blob([JSON.stringify(d,null,2)],{type:'application/json'}),u=URL.createObjectURL(bl),a=document.createElement('a');
    a.href=u;a.download='medman_tags_'+new Date().toISOString().slice(0,10)+'.json';a.click();URL.revokeObjectURL(u);st('Exportiert');
});
document.getElementById('f-imp').addEventListener('change',async e=>{
    let f=e.target.files[0];if(!f)return;let t=await f.text(),d=JSON.parse(t),r=await api('/api/tags/import',{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify(d)});
    await lt();if(S.files.length)await lf();st(`${r.imported||0} importiert`);
});

// --- Selection bar ---
document.getElementById('sel-tag-btn').addEventListener('click',selTag);
document.getElementById('sel-mv-btn').addEventListener('click',selMove);
document.getElementById('sel-del-btn').addEventListener('click',selDel);
document.getElementById('sel-clr-btn').addEventListener('click',clearSel);

// --- Selection section ---
document.getElementById('b-sel-all').addEventListener('click',selAll);
document.getElementById('b-sel-tag').addEventListener('click',selTag);
document.getElementById('b-sel-untag').addEventListener('click',selUntag);
document.getElementById('b-sel-mv').addEventListener('click',selMove);
document.getElementById('b-sel-del').addEventListener('click',selDel);
document.getElementById('b-sel-clr').addEventListener('click',clearSel);

// --- Modals ---
function closeModal(){
    _clearNavKd();
    document.getElementById('prev-modal').classList.remove('on');
    S.ph=null;
    lf(S.sm?S.stags[0]:null);
}
document.getElementById('m-close').addEventListener('click',closeModal);
document.getElementById('prev-modal').addEventListener('click',e=>{if(e.target===e.currentTarget)closeModal();});
document.getElementById('conf-no').addEventListener('click',()=>document.getElementById('conf-modal').classList.remove('on'));
document.addEventListener('keydown',e=>{if(e.key==='Escape'){if(document.getElementById('prev-modal').classList.contains('on'))closeModal();}});

// --- Init ---
lt(); lf(); ldd();
</script>
</body>
</html>