import { useConfirm } from '../confirm.jsx';
import { useState, useMemo, useEffect, useRef } from 'react';
import { api, S } from '../lib.js';

const DEFAULTS = {
  materialpreis_pro_gramm: 0.01, stromverbrauch_kw: 0.15,
  strompreis_pro_kwh: 0.38,      druckerpreis: 550,
  gesamtdruckstunden: 5000,      verschleiss_pro_stunde: 0.06,
};
const getFarbFaktor = n => Math.round((1.0 + Math.max(0, n - 1) * 0.1) * 100) / 100;
const STUFEN = [
  { key:'f', emoji:'💖', label:'Freundschaft', mult:1.0, c:'#ff6b9d' },
  { key:'n', emoji:'🤝', label:'Normal',       mult:1.5, c:'#4ecdc4' },
  { key:'a', emoji:'💼', label:'Auftrag',      mult:2.5, c:'#ffe66d' },
];

// ── Bild komprimieren (client-seitig, max 800px, JPEG 0.75) ──────────────────
function compressImage(file) {
  return new Promise((resolve, reject) => {
    const reader = new FileReader();
    reader.onload = e => {
      const img = new Image();
      img.onload = () => {
        const MAX = 800;
        let w = img.width, h = img.height;
        if (w > MAX || h > MAX) {
          if (w > h) { h = Math.round(h * MAX / w); w = MAX; }
          else       { w = Math.round(w * MAX / h); h = MAX; }
        }
        const canvas = document.createElement('canvas');
        canvas.width = w; canvas.height = h;
        canvas.getContext('2d').drawImage(img, 0, 0, w, h);
        resolve(canvas.toDataURL('image/jpeg', 0.75));
      };
      img.onerror = reject;
      img.src = e.target.result;
    };
    reader.onerror = reject;
    reader.readAsDataURL(file);
  });
}

// ── Stepper ───────────────────────────────────────────────────────────────────
function Stepper({ label, value, onChange, step, unit, min = 0, hint }) {
  const dec = () => onChange(Math.max(min, Math.round((value - step) * 10000) / 10000));
  const inc = () => onChange(Math.round((value + step) * 10000) / 10000);
  return (
    <div>
      <div style={{ color:'rgba(255,255,255,0.4)', fontSize:10, fontFamily:'monospace', marginBottom:5, letterSpacing:1 }}>
        {label.toUpperCase()}{unit ? ` (${unit})` : ''}
      </div>
      <div style={{ display:'flex', alignItems:'center', background:'rgba(255,255,255,0.05)', borderRadius:8, border:'1px solid rgba(255,255,255,0.1)', overflow:'hidden' }}>
        <button onClick={dec} style={{ padding:'10px 12px', background:'transparent', border:'none', color:'rgba(255,255,255,0.6)', fontSize:20, cursor:'pointer', flexShrink:0, lineHeight:1 }}>−</button>
        <input type="number" value={value} step={step}
          onChange={e => onChange(parseFloat(e.target.value) || 0)}
          style={{ flex:1, background:'transparent', border:'none', color:'#fff', fontSize:15, fontFamily:"'Space Mono',monospace", textAlign:'center', outline:'none', minWidth:0, padding:'10px 4px' }}
        />
        <button onClick={inc} style={{ padding:'10px 12px', background:'transparent', border:'none', color:'rgba(255,255,255,0.6)', fontSize:20, cursor:'pointer', flexShrink:0, lineHeight:1 }}>+</button>
      </div>
      {hint && <div style={{ color:'rgba(255,255,255,0.2)', fontSize:10, fontFamily:'monospace', marginTop:3 }}>{hint}</div>}
    </div>
  );
}

function SmallInput({ label, value, onChange, step = 0.01 }) {
  return (
    <div>
      <div style={{ color:'rgba(255,255,255,0.35)', fontSize:9, fontFamily:'monospace', marginBottom:3 }}>{label}</div>
      <input type="number" value={value} step={step}
        onChange={e => onChange(parseFloat(e.target.value) || 0)}
        style={{ ...S.inp, padding:'7px 8px', fontSize:13 }}
      />
    </div>
  );
}

// ── Bild-Modal ────────────────────────────────────────────────────────────────
function ImageModal({ src, onClose }) {
  return (
    <div style={{ position:'fixed', inset:0, background:'rgba(0,0,0,0.9)', zIndex:9000,
      display:'flex', alignItems:'center', justifyContent:'center', padding:20 }}
      onClick={onClose}>
      <img src={src} alt="Vorschau"
        style={{ maxWidth:'100%', maxHeight:'90vh', borderRadius:10, objectFit:'contain' }} />
    </div>
  );
}

// ── Kostenrechner ─────────────────────────────────────────────────────────────
export default function Kalkulator3D({ toast, editData, onEditDone, mobile }) {
  const [gramm,   setGramm]   = useState(editData?.gramm   ?? 50);
  const [stunden, setStunden] = useState(editData?.stunden ?? 3);
  const [farben,  setFarben]  = useState(editData?.farben  ?? 1);
  const [vars,    setVars]    = useState(editData ? {
    materialpreis_pro_gramm: editData.materialpreis_pro_gramm,
    stromverbrauch_kw:        editData.stromverbrauch_kw,
    strompreis_pro_kwh:       editData.strompreis_pro_kwh,
    druckerpreis:             editData.druckerpreis,
    gesamtdruckstunden:       editData.gesamtdruckstunden,
    verschleiss_pro_stunde:   editData.verschleiss_pro_stunde,
  } : { ...DEFAULTS });
  const [showAdv,   setShowAdv]   = useState(false);
  const [name,      setName]      = useState(editData?.name      ?? '');
  const [bemerkung, setBemerkung] = useState(editData?.bemerkung ?? '');
  const [image,     setImage]     = useState(editData?.image     ?? null);
  const [saving,    setSaving]    = useState(false);
  const fileRef = useRef(null);
  const sv = (k, v) => setVars(p => ({ ...p, [k]: v }));

  const calc = useMemo(() => {
    const f   = getFarbFaktor(farben);
    const mat = gramm   * vars.materialpreis_pro_gramm * f;
    const str = stunden * vars.stromverbrauch_kw       * vars.strompreis_pro_kwh;
    const ver = stunden * vars.verschleiss_pro_stunde;
    return { mat, str, ver, grund: mat + str + ver };
  }, [gramm, stunden, farben, vars]);

  const handleImagePick = async e => {
    const file = e.target.files?.[0];
    if (!file) return;
    try {
      const compressed = await compressImage(file);
      setImage(compressed);
    } catch { toast('Bild konnte nicht geladen werden', 'error'); }
    e.target.value = '';
  };

  const save = async () => {
    if (!name.trim()) { toast('Bitte einen Namen eingeben', 'error'); return; }
    setSaving(true);
    try {
      const payload = { name, gramm, stunden, farben, ...vars,
        preis_freundschaft: calc.grund * 1.0,
        preis_normal:       calc.grund * 1.5,
        preis_auftrag:      calc.grund * 2.5,
        image, bemerkung };
      if (editData?.id) {
        await api(`/tools/kalkulator3d/${editData.id}`, { method:'PUT', body:payload });
        toast('Aktualisiert ✓'); onEditDone?.();
      } else {
        await api('/tools/kalkulator3d', { body:payload });
        toast('Gespeichert ✓'); setName(''); setBemerkung(''); setImage(null);
      }
    } catch(e) { toast(e.message, 'error'); } finally { setSaving(false); }
  };

  const pad = mobile ? '14px 14px 90px' : '36px 44px';

  return (
    <div style={{ padding:pad, maxWidth:860 }}>
      <div style={{ display:'flex', justifyContent:'space-between', alignItems:'flex-start', marginBottom:20 }}>
        <div>
          {editData && <div style={{ color:'#ffe66d', fontSize:10, fontFamily:'monospace', marginBottom:4 }}>✎ {editData.name}</div>}
          <h1 style={{ color:'#fff', fontFamily:"'Space Mono',monospace", fontSize:mobile?18:22, margin:0 }}>Kostenrechner</h1>
        </div>
        {editData && <button onClick={onEditDone} style={S.btn('#ff6b9d', true)}>✕ Abbrechen</button>}
      </div>

      {/* Eingaben */}
      <div style={{ ...S.card, marginBottom:10 }}>
        <div style={{ display:'flex', flexDirection:'column', gap:10, marginBottom:10 }}>
          <Stepper label="Gewicht"    value={gramm}   onChange={setGramm}   step={1}   unit="g" min={0} />
          <Stepper label="Druckdauer" value={stunden} onChange={setStunden} step={0.5} unit="h" min={0} />
          <Stepper label="Anzahl Farben" value={farben}
            onChange={v => setFarben(Math.max(1, Math.round(v)))} step={1} min={1}
            hint={`Farbfaktor: ×${getFarbFaktor(farben).toFixed(2)}`} />
        </div>

        <button onClick={() => setShowAdv(v => !v)} style={{
          width:'100%', marginTop:4, background:'rgba(255,255,255,0.02)',
          border:'1px solid rgba(255,255,255,0.06)', borderRadius:7,
          padding:'9px 12px', color:'rgba(255,255,255,0.35)', cursor:'pointer',
          fontFamily:'monospace', fontSize:11, textAlign:'left',
          display:'flex', alignItems:'center', gap:7,
        }}>
          <span style={{ display:'inline-block', transform:showAdv?'rotate(90deg)':'rotate(0)', transition:'transform 0.18s' }}>▶</span>
          Erweiterte Einstellungen
          <span style={{ marginLeft:'auto', fontSize:9, background:'rgba(78,205,196,0.1)', borderRadius:3, padding:'2px 6px', color:'#4ecdc4' }}>
            {Object.entries(vars).some(([k,v]) => v !== DEFAULTS[k]) ? 'GEÄNDERT' : 'STANDARD'}
          </span>
        </button>
        {showAdv && (
          <div style={{ marginTop:10, background:'rgba(0,0,0,0.2)', border:'1px solid rgba(255,255,255,0.05)', borderRadius:9, padding:12 }}>
            <div style={{ display:'grid', gridTemplateColumns:'1fr 1fr', gap:10 }}>
              <SmallInput label="Material €/g"  value={vars.materialpreis_pro_gramm} onChange={v=>sv('materialpreis_pro_gramm',v)} step={0.001}/>
              <SmallInput label="Strom kW"       value={vars.stromverbrauch_kw}        onChange={v=>sv('stromverbrauch_kw',v)}        step={0.01}/>
              <SmallInput label="Strom €/kWh"    value={vars.strompreis_pro_kwh}       onChange={v=>sv('strompreis_pro_kwh',v)}       step={0.01}/>
              <SmallInput label="Drucker €"      value={vars.druckerpreis}             onChange={v=>sv('druckerpreis',v)}             step={10}/>
              <SmallInput label="Lebensdauer h"  value={vars.gesamtdruckstunden}       onChange={v=>sv('gesamtdruckstunden',v)}       step={100}/>
              <SmallInput label="Verschleiß €/h" value={vars.verschleiss_pro_stunde}   onChange={v=>sv('verschleiss_pro_stunde',v)}   step={0.01}/>
            </div>
            <button onClick={() => setVars({...DEFAULTS})} style={{ ...S.btn('#ff6b9d', true), marginTop:10 }}>↺ Standard</button>
          </div>
        )}
      </div>

      {/* Ergebnis */}
      <div style={{ ...S.card, marginBottom:10 }}>
        <div style={{ display:'grid', gridTemplateColumns:'1fr 1fr', gap:0 }}>
          {[['Material',calc.mat,'#a78bfa'],['Strom',calc.str,'#60a5fa'],['Verschleiß',calc.ver,'#f59e0b'],['Grundkosten',calc.grund,'#4ecdc4']].map(([l,v,c],i) => (
            <div key={l} style={{
              padding:'10px 14px',
              borderBottom: i < 2 ? '1px solid rgba(255,255,255,0.05)' : 'none',
              borderRight:  i % 2 === 0 ? '1px solid rgba(255,255,255,0.05)' : 'none',
            }}>
              <div style={{ color:'rgba(255,255,255,0.3)', fontSize:9, fontFamily:'monospace', marginBottom:2 }}>{l.toUpperCase()}</div>
              <div style={{ color:c, fontSize:i===3?18:14, fontFamily:"'Space Mono',monospace", fontWeight:i===3?700:400 }}>
                {v.toFixed(2)} €
              </div>
            </div>
          ))}
        </div>
      </div>

      {/* Preise */}
      <div style={{ display:'grid', gridTemplateColumns:'1fr 1fr 1fr', gap:8, marginBottom:12 }}>
        {STUFEN.map((s, i) => (
          <div key={s.key} style={{
            background:`${s.c}10`, border:`1px solid ${s.c}30`, borderRadius:10,
            padding:'12px 10px', textAlign:'center', transform:i===1?'scale(1.04)':'scale(1)',
          }}>
            <div style={{ fontSize:20, marginBottom:3 }}>{s.emoji}</div>
            <div style={{ color:'rgba(255,255,255,0.35)', fontSize:9, fontFamily:'monospace', marginBottom:4 }}>{s.label}</div>
            <div style={{ color:s.c, fontSize:mobile?16:20, fontFamily:"'Space Mono',monospace", fontWeight:700 }}>
              {(calc.grund * s.mult).toFixed(2)}€
            </div>
            <div style={{ color:'rgba(255,255,255,0.2)', fontSize:8, fontFamily:'monospace', marginTop:2 }}>×{s.mult}</div>
          </div>
        ))}
      </div>

      {/* Speichern */}
      <div style={S.card}>
        <div style={{ ...S.head, marginBottom:10 }}>BERECHNUNG SPEICHERN</div>

        {/* Name */}
        <div style={{ marginBottom:10 }}>
          <label style={{ ...S.head, display:'block', marginBottom:4 }}>NAME</label>
          <input value={name} onChange={e => setName(e.target.value)}
            onKeyDown={e => e.key === 'Enter' && save()}
            placeholder='z.B. "Halterung Müller"'
            style={{ ...S.inp, fontSize:15 }} />
        </div>

        {/* Bemerkung */}
        <div style={{ marginBottom:10 }}>
          <label style={{ ...S.head, display:'block', marginBottom:4 }}>BEMERKUNG</label>
          <textarea value={bemerkung} onChange={e => setBemerkung(e.target.value)}
            placeholder="Material, Infill, Notizen…"
            rows={3}
            style={{ ...S.inp, resize:'vertical', lineHeight:1.6, fontSize:14, padding:'9px 12px' }} />
        </div>

        {/* Bild */}
        <div style={{ marginBottom:14 }}>
          <label style={{ ...S.head, display:'block', marginBottom:6 }}>BILD (optional)</label>
          <input ref={fileRef} type="file" accept="image/*" onChange={handleImagePick}
            style={{ display:'none' }} />
          {image ? (
            <div style={{ position:'relative', display:'inline-block' }}>
              <img src={image} alt="Vorschau"
                style={{ width:'100%', maxWidth:240, height:140, objectFit:'cover', borderRadius:8,
                  border:'1px solid rgba(255,255,255,0.1)', display:'block' }} />
              <button onClick={() => setImage(null)} style={{
                position:'absolute', top:6, right:6,
                width:24, height:24, borderRadius:'50%',
                background:'rgba(0,0,0,0.7)', border:'none',
                color:'#fff', fontSize:13, cursor:'pointer', lineHeight:1,
              }}>✕</button>
            </div>
          ) : (
            <button onClick={() => fileRef.current?.click()} style={{
              width:'100%', padding:'20px', background:'rgba(255,255,255,0.03)',
              border:'1px dashed rgba(255,255,255,0.15)', borderRadius:8,
              color:'rgba(255,255,255,0.3)', cursor:'pointer', fontFamily:'monospace', fontSize:12,
            }}>📷 Bild hinzufügen</button>
          )}
        </div>

        <button onClick={save} disabled={saving} style={{
          width:'100%', background:'linear-gradient(135deg,#4ecdc4,#45b7d1)', border:'none',
          borderRadius:8, padding:'12px 0', color:'#0d0d0f',
          fontFamily:"'Space Mono',monospace", fontWeight:700,
          fontSize:13, cursor:saving?'default':'pointer', opacity:saving?0.7:1,
        }}>{saving ? '…' : editData?.id ? '✓ Aktualisieren' : '↓ Speichern'}</button>
      </div>
    </div>
  );
}

// ── Archiv ──────────────────────────────────────────────────────────────
export function SavedList({ toast, mobile }) {
  const { confirm, ConfirmDialog } = useConfirm();
  const [items,    setItems]    = useState([]);
  const [loading,  setLoading]  = useState(true);
  const [delId,    setDelId]    = useState(null);
  const [editData, setEditData] = useState(null);
  const [search,   setSearch]   = useState('');
  const [lightbox, setLightbox] = useState(null);

  useEffect(() => {
    api('/tools/kalkulator3d').then(setItems).catch(e => toast(e.message, 'error')).finally(() => setLoading(false));
  }, []);

  const del = async id => {
    try { await api(`/tools/kalkulator3d/${id}`, { method:'DELETE' }); setItems(p => p.filter(i => i.id !== id)); toast('Gelöscht'); }
    catch(e) { toast(e.message, 'error'); } finally { setDelId(null); }
  };

  const filtered = search.trim()
    ? items.filter(i =>
        i.name.toLowerCase().includes(search.toLowerCase()) ||
        (i.bemerkung && i.bemerkung.toLowerCase().includes(search.toLowerCase()))
      )
    : items;

  if (editData) return (
    <Kalkulator3D toast={toast} mobile={mobile} editData={editData} onEditDone={() => {
      setEditData(null);
      api('/tools/kalkulator3d').then(setItems).catch(() => {});
    }} />
  );

  return (
    <div style={{ padding: mobile ? '14px 14px 90px' : '36px 44px', maxWidth:900 }}>
      {lightbox && <ImageModal src={lightbox} onClose={() => setLightbox(null)} />}

      <h1 style={{ color:'#fff', fontFamily:"'Space Mono',monospace", fontSize:mobile?18:22, marginBottom:14 }}>Archiv</h1>

      {/* Suche */}
      <div style={{ position:'relative', marginBottom:12 }}>
        <span style={{ position:'absolute', left:12, top:'50%', transform:'translateY(-50%)',
          color:'rgba(255,255,255,0.3)', fontSize:14, pointerEvents:'none' }}>⌕</span>
        <input value={search} onChange={e => setSearch(e.target.value)}
          placeholder="Name oder Bemerkung suchen…"
          style={{ ...S.inp, paddingLeft:34, fontSize:15 }} />
        {search && (
          <button onClick={() => setSearch('')} style={{
            position:'absolute', right:10, top:'50%', transform:'translateY(-50%)',
            background:'transparent', border:'none', color:'rgba(255,255,255,0.3)',
            cursor:'pointer', fontSize:16,
          }}>✕</button>
        )}
      </div>

      <p style={{ color:'rgba(255,255,255,0.25)', fontFamily:'monospace', fontSize:10, marginBottom:14 }}>
        {filtered.length} von {items.length} Einträgen{search ? ` für „${search}"` : ''}
      </p>

      {loading && <div style={{ color:'rgba(255,255,255,0.3)', fontFamily:'monospace' }}>Lädt…</div>}

      {!loading && items.length === 0 && (
        <div style={{ ...S.card, textAlign:'center', padding:40 }}>
          <div style={{ fontSize:28, marginBottom:10 }}>◉</div>
          <div style={{ color:'rgba(255,255,255,0.25)', fontFamily:'monospace', fontSize:12 }}>Noch keine Berechnungen.</div>
        </div>
      )}

      {!loading && search && filtered.length === 0 && (
        <div style={{ ...S.card, textAlign:'center', padding:24 }}>
          <div style={{ color:'rgba(255,255,255,0.25)', fontFamily:'monospace', fontSize:12 }}>Keine Treffer.</div>
        </div>
      )}

      {filtered.map(item => (
        <div key={item.id} style={{ ...S.card, marginBottom:10, padding:'14px' }}>
          <div style={{ display:'flex', gap:12 }}>

            {/* Bild Thumbnail */}
            {item.image && (
              <img src={item.image} alt={item.name}
                onClick={() => setLightbox(item.image)}
                style={{ width:72, height:72, objectFit:'cover', borderRadius:8, flexShrink:0,
                  border:'1px solid rgba(255,255,255,0.1)', cursor:'pointer' }} />
            )}

            <div style={{ flex:1, minWidth:0 }}>
              {/* Name + Datum */}
              <div style={{ display:'flex', justifyContent:'space-between', alignItems:'flex-start', marginBottom:4 }}>
                <div style={{ color:'#fff', fontFamily:'monospace', fontSize:13, fontWeight:700 }}>{item.name}</div>
                <div style={{ color:'rgba(255,255,255,0.2)', fontFamily:'monospace', fontSize:10, flexShrink:0, marginLeft:8 }}>
                  {new Date(item.created_at).toLocaleDateString('de-DE')}
                </div>
              </div>

              {/* Infos */}
              <div style={{ color:'rgba(255,255,255,0.3)', fontFamily:'monospace', fontSize:10, marginBottom:6 }}>
                {item.gramm}g · {item.stunden}h · {item.farben} Farbe{item.farben > 1 ? 'n' : ''}
              </div>

              {/* Bemerkung */}
              {item.bemerkung && (
                <div style={{ color:'rgba(255,255,255,0.45)', fontFamily:'monospace', fontSize:11,
                  lineHeight:1.5, marginBottom:8, wordBreak:'break-word' }}>
                  {item.bemerkung}
                </div>
              )}

              {/* Preise */}
              <div style={{ display:'grid', gridTemplateColumns:'1fr 1fr 1fr', gap:6, marginBottom:10 }}>
                {[['💖',item.preis_freundschaft,'#ff6b9d'],['🤝',item.preis_normal,'#4ecdc4'],['💼',item.preis_auftrag,'#ffe66d']].map(([e,v,c]) => (
                  <div key={e} style={{ background:`${c}10`, border:`1px solid ${c}25`, borderRadius:7, padding:'6px 4px', textAlign:'center' }}>
                    <div style={{ fontSize:12 }}>{e}</div>
                    <div style={{ color:c, fontFamily:"'Space Mono',monospace", fontSize:12, fontWeight:700 }}>{v.toFixed(2)}€</div>
                  </div>
                ))}
              </div>
            </div>
          </div>

          {/* Aktionen */}
          <div style={{ display:'flex', gap:6, marginTop:10 }}>
            <button onClick={() => setEditData(item)} style={{ ...S.btn('#4ecdc4', true), flex:1, textAlign:'center' }}>✎ Bearbeiten</button>
            <button onClick={() => del(item.id)} style={{ ...S.btn('#ff6b9d', true), flex:1, textAlign:'center' }}>✕ Löschen</button>
          </div>
        </div>
      ))}
    </div>
  );
}