// screens-library.jsx

function Library({ navigate, onOpenAsset, openProject }) {
  const { BINS, PROJECTS } = window.ZAMPP_DATA;
  const [view, setView] = React.useState('grid');
  const [filter, setFilter] = React.useState('all');
  const [search, setSearch] = React.useState(window._dfPendingSearch || '');
  React.useEffect(() => { delete window._dfPendingSearch; }, []);
  // Local state lets us re-render after delete / move-to-bin without forcing
  // a full app reload — keeps ZAMPP_DATA in sync as the cache of record.
  const [allAssets, setAllAssets] = React.useState(window.ZAMPP_DATA.ASSETS || []);
  const [ctxMenu, setCtxMenu] = React.useState(null); // { asset, x, y }

  const refreshAssets = React.useCallback(() => {
    window.ZAMPP_API.fetch('/assets?limit=500')
      .then(r => {
        const list = Array.isArray(r) ? r : (r.assets || []);
        const proj = {};
        (PROJECTS || []).forEach(p => { proj[p.id] = p.name; });
        const normalized = list.map(a => window.normalizeAsset ? window.normalizeAsset(a, proj) : a);
        window.ZAMPP_DATA.ASSETS = normalized;
        setAllAssets(normalized);
      })
      .catch(() => {});
  }, [PROJECTS]);

  // Dismiss the context menu on any outside click (capture phase so clicking
  // a menu item still fires before the menu unmounts).
  React.useEffect(() => {
    if (!ctxMenu) return;
    const close = () => setCtxMenu(null);
    window.addEventListener('click', close);
    window.addEventListener('contextmenu', close);
    window.addEventListener('scroll', close, true);
    return () => {
      window.removeEventListener('click', close);
      window.removeEventListener('contextmenu', close);
      window.removeEventListener('scroll', close, true);
    };
  }, [ctxMenu]);

  const openCtx = (asset, e) => {
    e.preventDefault();
    e.stopPropagation();
    setCtxMenu({ asset, x: e.clientX, y: e.clientY });
  };

  let assets = openProject
    ? allAssets.filter(function(a) { return a.project_id === openProject.id; })
    : allAssets;
  const ALL_ASSETS = allAssets;
  if (filter !== 'all') assets = assets.filter(function(a) { return a.status === filter; });
  if (search) assets = assets.filter(function(a) { return a.name.toLowerCase().includes(search.toLowerCase()); });

  const displayTitle = openProject ? openProject.name : 'All Assets';
  const errorCount = ALL_ASSETS.filter(function(a) { return a.status === 'error'; }).length;
  const recentCount = ALL_ASSETS.filter(function(a) { return (Date.now() - new Date(a.created_at)) < 86400000; }).length;

  return (
    <div className="library-layout">
      <aside className="library-rail">
        <div>
          <h4>Projects</h4>
          <div className="rail-list">
            <div className={`rail-item ${!openProject ? 'active' : ''}`} onClick={function() { navigate('library'); }} style={{ cursor: 'pointer' }}>
              <Icon name="library" size={13} className="rail-icon" />
              <span>All projects</span>
              <span className="rail-count">{ALL_ASSETS.length}</span>
            </div>
            {PROJECTS.slice(0, 8).map(function(p) {
              return (
                <div key={p.id} className={`rail-item ${openProject && openProject.id === p.id ? 'active' : ''}`} style={{ cursor: 'pointer' }}
                  onClick={function() { navigate('projects'); }}>
                  <span className="rail-color-dot" style={{ background: p.color }} />
                  <span style={{ overflow: 'hidden', textOverflow: 'ellipsis', whiteSpace: 'nowrap' }}>{p.name}</span>
                  <span className="rail-count">{p.assets}</span>
                </div>
              );
            })}
          </div>
        </div>
        {BINS.length > 0 && (
          <div>
            <h4>Bins</h4>
            <div className="rail-list">
              {BINS.map(function(b) {
                return (
                  <div key={b.id} className="rail-item">
                    <Icon name={binIcon(b.icon)} size={13} className="rail-icon" />
                    <span>{b.name}</span>
                    <span className="rail-count">{b.count}</span>
                  </div>
                );
              })}
            </div>
          </div>
        )}
        <div>
          <h4>Smart filters</h4>
          <div className="rail-list">
            {errorCount > 0 && <div className="rail-item" onClick={function() { setFilter('error'); }} style={{ cursor: 'pointer' }}><Icon name="alert" size={13} className="rail-icon" /><span>Errors</span><span className="rail-count">{errorCount}</span></div>}
            <div className="rail-item" onClick={function() { setFilter('all'); }} style={{ cursor: 'pointer' }}><Icon name="clock" size={13} className="rail-icon" /><span>Last 24h</span><span className="rail-count">{recentCount}</span></div>
            <div className="rail-item" onClick={function() { setFilter('ready'); }} style={{ cursor: 'pointer' }}><Icon name="check" size={13} className="rail-icon" /><span>Ready</span><span className="rail-count">{ALL_ASSETS.filter(function(a) { return a.status === 'ready'; }).length}</span></div>
          </div>
        </div>
      </aside>

      <div className="library-main">
        <div className="library-toolbar">
          <div className="toolbar-title">{displayTitle}</div>
          <span className="count">· {assets.length} assets</span>
          <div style={{ flex: 1 }} />
          <div className="search" style={{ width: 220 }}>
            <Icon name="search" className="search-icon" />
            <input value={search} onChange={function(e) { setSearch(e.target.value); }} placeholder="Filter assets…" />
          </div>
          <div className="tab-group">
            {['all', 'ready', 'processing', 'live', 'error'].map(function(f) {
              return (
                <button key={f} className={filter === f ? 'active' : ''} onClick={function() { setFilter(f); }}>
                  {f === 'all' ? 'All' : f[0].toUpperCase() + f.slice(1)}
                </button>
              );
            })}
          </div>
          <div className="tab-group">
            <button className={view === 'grid' ? 'active' : ''} onClick={function() { setView('grid'); }}><Icon name="grid" size={12} /></button>
            <button className={view === 'list' ? 'active' : ''} onClick={function() { setView('list'); }}><Icon name="list" size={12} /></button>
          </div>
          <button className="btn primary" onClick={function() { navigate('upload'); }}><Icon name="upload" />Upload</button>
        </div>

        {assets.length === 0 ? (
          <div style={{ padding: 60, textAlign: 'center', color: 'var(--text-3)' }}>No assets match this filter.</div>
        ) : view === 'grid' ? (
          <div className="library-grid">
            {assets.map(function(a) {
              return <AssetCard key={a.id} asset={a}
                       onOpen={function() { onOpenAsset(a); }}
                       onContextMenu={function(e) { openCtx(a, e); }} />;
            })}
          </div>
        ) : (
          <div className="library-list">
            <div className="list-row head">
              <div></div><div>Name</div><div>Duration</div><div>Resolution</div><div>Codec</div><div>Size</div><div>Updated</div><div></div>
            </div>
            {assets.map(function(a) {
              return (
                <div key={a.id} className="list-row" onClick={function() { onOpenAsset(a); }} onContextMenu={function(e) { openCtx(a, e); }} style={{ cursor: 'pointer' }}>
                  <div className="thumb"><AssetThumb asset={a} /></div>
                  <div>
                    <div className="name">{a.name}</div>
                    <div style={{ display: 'flex', gap: 6, marginTop: 2 }}>
                      <StatusDot status={a.status} />
                      <span style={{ fontSize: 11, color: 'var(--text-3)' }}>{a.status}</span>
                    </div>
                  </div>
                  <div className="col-sub">{a.duration}</div>
                  <div className="col-sub">{a.res}</div>
                  <div className="col-sub">{a.codec || '—'}</div>
                  <div className="col-sub">{a.size}</div>
                  <div className="col-sub">{a.updated}</div>
                  <button className="icon-btn" onClick={function(e) { e.stopPropagation(); openCtx(a, e); }}><Icon name="more" /></button>
                </div>
              );
            })}
          </div>
        )}
      </div>
      {ctxMenu && (
        <AssetContextMenu
          asset={ctxMenu.asset}
          x={ctxMenu.x}
          y={ctxMenu.y}
          bins={BINS}
          onClose={function() { setCtxMenu(null); }}
          onChanged={refreshAssets}
          onOpen={function() { onOpenAsset(ctxMenu.asset); }}
        />
      )}
    </div>
  );
}

function AssetContextMenu({ asset, x, y, bins, onClose, onChanged, onOpen }) {
  const ref = React.useRef(null);
  // Pin the menu inside the viewport even if the user right-clicked near
  // the bottom-right edge of the grid.
  const [pos, setPos] = React.useState({ left: x, top: y });
  React.useLayoutEffect(() => {
    if (!ref.current) return;
    const r = ref.current.getBoundingClientRect();
    const margin = 8;
    let nx = x, ny = y;
    if (x + r.width  + margin > window.innerWidth)  nx = window.innerWidth  - r.width  - margin;
    if (y + r.height + margin > window.innerHeight) ny = window.innerHeight - r.height - margin;
    setPos({ left: Math.max(margin, nx), top: Math.max(margin, ny) });
  }, [x, y]);

  const rename = function() {
    onClose();
    const next = prompt('Rename asset', asset.display_name || asset.name || '');
    if (next == null) return;
    const trimmed = next.trim();
    if (!trimmed || trimmed === (asset.display_name || asset.name)) return;
    window.ZAMPP_API.fetch('/assets/' + asset.id, { method: 'PATCH', body: JSON.stringify({ display_name: trimmed }) })
      .then(onChanged)
      .catch(function(e) { alert('Rename failed: ' + e.message); });
  };

  const moveToBin = function(binId) {
    onClose();
    window.ZAMPP_API.fetch('/assets/' + asset.id, { method: 'PATCH', body: JSON.stringify({ bin_id: binId }) })
      .then(onChanged)
      .catch(function(e) { alert('Move failed: ' + e.message); });
  };

  const copyId = function() {
    onClose();
    if (navigator.clipboard) navigator.clipboard.writeText(asset.id).catch(function() {});
  };

  const remove = function() {
    onClose();
    if (!confirm('Delete "' + (asset.display_name || asset.name) + '" permanently?\nThis removes the database row and the S3 objects.\nThis cannot be undone.')) return;
    window.ZAMPP_API.fetch('/assets/' + asset.id + '?hard=true', { method: 'DELETE' })
      .then(onChanged)
      .catch(function(e) { alert('Delete failed: ' + e.message); });
  };

  return (
    <div ref={ref} className="ctx-menu" style={{ left: pos.left, top: pos.top }}
         onClick={function(e) { e.stopPropagation(); }}
         onContextMenu={function(e) { e.preventDefault(); e.stopPropagation(); }}>
      <div className="ctx-header">{asset.display_name || asset.name}</div>
      <button onClick={function() { onClose(); onOpen(); }}><Icon name="play" size={11} />Open</button>
      <button onClick={rename}><Icon name="edit" size={11} />Rename…</button>
      <div className="ctx-divider" />
      {(bins && bins.length > 0) ? (
        <>
          <div className="ctx-section-label">Move to bin</div>
          {bins
            .filter(function(b) { return !asset.project_id || b.project_id === asset.project_id; })
            .slice(0, 10)
            .map(function(b) {
              const isCurrent = asset.bin_id === b.id;
              return (
                <button key={b.id} onClick={function() { moveToBin(b.id); }} disabled={isCurrent}
                  title={b.project_name ? 'in ' + b.project_name : ''}>
                  <Icon name="folder" size={11} />{b.name}{isCurrent && <span style={{ marginLeft: 'auto', fontSize: 10, color: 'var(--text-3)' }}>current</span>}
                </button>
              );
            })}
          {asset.bin_id && (
            <button onClick={function() { moveToBin(null); }}>
              <Icon name="x" size={11} />Remove from bin
            </button>
          )}
        </>
      ) : (
        <div className="ctx-empty">No bins — create one inside a project</div>
      )}
      <div className="ctx-divider" />
      <button onClick={copyId}><Icon name="library" size={11} />Copy asset ID</button>
      <button className="danger" onClick={remove}><Icon name="trash" size={11} />Delete permanently</button>
    </div>
  );
}

function AssetCard({ asset, onOpen, onContextMenu }) {
  const [hoverStream, setHoverStream] = React.useState(null);
  const [hovered, setHovered] = React.useState(false);
  const timerRef = React.useRef(null);
  const hlsRef = React.useRef(null);
  const videoRef = React.useRef(null);

  const handleMouseEnter = function() {
    timerRef.current = setTimeout(function() {
      setHovered(true);
      if (!hoverStream) {
        window.ZAMPP_API.fetch('/assets/' + asset.id + '/stream')
          .then(function(r) { if (r && r.url) setHoverStream(r); })
          .catch(function() {});
      }
    }, 350);
  };

  const handleMouseLeave = function() {
    clearTimeout(timerRef.current);
    setHovered(false);
  };

  // HLS wiring
  React.useEffect(function() {
    if (!hovered || !hoverStream || hoverStream.type !== 'hls' || !videoRef.current) return;
    if (!window.Hls) return;
    hlsRef.current = new window.Hls({ maxBufferLength: 10 });
    hlsRef.current.loadSource(hoverStream.url);
    hlsRef.current.attachMedia(videoRef.current);
    return function() {
      if (hlsRef.current) { hlsRef.current.destroy(); hlsRef.current = null; }
    };
  }, [hovered, hoverStream]);

  const showVideo = hovered && hoverStream;

  return (
    <div className="asset-card" onClick={onOpen} onContextMenu={onContextMenu} onMouseEnter={handleMouseEnter} onMouseLeave={handleMouseLeave}>
      <div style={{ position: 'relative' }}>
        <AssetThumb asset={asset} />
        {showVideo && (
          <video
            key={hoverStream.url}
            ref={videoRef}
            src={hoverStream.type !== 'hls' ? hoverStream.url : undefined}
            autoPlay
            muted
            loop
            playsInline
            style={{
              position: 'absolute',
              inset: 0,
              width: '100%',
              height: '100%',
              objectFit: 'cover',
              borderRadius: 6,
            }}
          />
        )}
      </div>
      <div className="thumb-status">
        {asset.status === 'live' && <span className="badge live">LIVE</span>}
        {asset.status === 'processing' && <span className="badge warning">Processing</span>}
        {asset.status === 'error' && <span className="badge danger">Error</span>}
      </div>
      {(asset.type === 'video' || !asset.type) && asset.duration !== '—' && <div className="thumb-duration">{asset.duration}</div>}
      <div className="meta">
        <div className="name">{asset.name}</div>
        <div className="sub">
          <span>{asset.res}</span>
          <span>·</span>
          <span>{asset.size}</span>
        </div>
      </div>
    </div>
  );
}

function binIcon(name) {
  return { grid: 'library', live: 'record', film: 'film', proxy: 'proxy', audio: 'audio', package: 'package' }[name] || 'folder';
}

window.Library = Library;
window.AssetCard = AssetCard;