// Sidebar — workspace switcher + file tree.

const Sidebar = ({ workspace, workspaces, onCycleWorkspace, openFile, activeFile, onOpenFile }) => {
  const ws = workspaces[workspace];
  return (
    <aside style={ssStyles.root}>
      <button style={ssStyles.ws} onClick={onCycleWorkspace} title="Switch workspace">
        <span style={{ display:'flex', alignItems:'center', gap: 8 }}>
          <Icon name="logo" size={20}/>
          <span style={ssStyles.wsName}>{ws.name}</span>
        </span>
        <span style={ssStyles.wsHint}>⌘1</span>
      </button>

      <div style={ssStyles.search}>
        <Icon name="search" size={14} style={{ color: 'var(--fg-3)' }}/>
        <input placeholder="Search files…" style={ssStyles.searchInput}/>
        <span style={ssStyles.kbd}>⌘K</span>
      </div>

      <div style={ssStyles.head}>EXPLORER</div>
      <div style={ssStyles.tree}>
        {ws.tree.map(node => (
          <TreeNode key={node.path} node={node} depth={0}
            activeFile={activeFile} onOpenFile={onOpenFile}/>
        ))}
      </div>

      <div style={ssStyles.foot}>
        <Icon name="settings" size={14}/>
        <span>settings</span>
      </div>
    </aside>
  );
};

const TreeNode = ({ node, depth, activeFile, onOpenFile }) => {
  const [open, setOpen] = React.useState(node.open !== false);
  const isFile = !node.children;
  const active = activeFile === node.path;

  return (
    <>
      <div
        style={{
          ...ssStyles.row,
          paddingLeft: 8 + depth * 14,
          background: active ? 'rgba(99,136,216,0.18)' : undefined,
          color: active ? '#a4c4ff' : 'var(--fg-1)',
        }}
        onClick={() => isFile ? onOpenFile(node.path) : setOpen(o => !o)}
      >
        {!isFile && <Icon name={open ? "chevron-d" : "chevron-r"} size={12} style={{ color:'var(--fg-3)' }}/>}
        {isFile && <span style={{ width: 12 }}/>}
        <Icon name={isFile ? "file" : "folder"} size={14}
          style={{ color: isFile ? 'var(--fg-2)' : '#42dcd1' }}/>
        <span style={ssStyles.name}>{node.name}</span>
        {node.modified && <span style={ssStyles.modified}>●</span>}
      </div>
      {!isFile && open && node.children.map(c => (
        <TreeNode key={c.path} node={c} depth={depth+1}
          activeFile={activeFile} onOpenFile={onOpenFile}/>
      ))}
    </>
  );
};

const ssStyles = {
  root: {
    width: 260, flex: '0 0 260px',
    background: '#1f222d',
    borderRight: '1px solid #373b46',
    display: 'flex', flexDirection: 'column',
    fontFamily: 'var(--font-sans)',
    color: 'var(--fg-1)',
  },
  ws: {
    display: 'flex', alignItems:'center', justifyContent:'space-between',
    padding: '12px 14px',
    background: 'transparent', border: 0, borderBottom: '1px solid #373b46',
    color: 'var(--fg-0)',
    cursor: 'pointer', textAlign: 'left',
    fontFamily: 'var(--font-sans)',
  },
  wsName: { fontSize: 14, fontWeight: 600, letterSpacing: '-0.005em' },
  wsHint: {
    fontFamily: 'var(--font-mono)', fontSize: 10,
    color: 'var(--fg-3)', background: '#1b1e28',
    padding: '2px 6px', borderRadius: 4, border: '1px solid #414751',
  },
  search: {
    display: 'flex', alignItems:'center', gap: 8,
    margin: '10px 12px',
    padding: '6px 10px',
    background: '#1b1e28',
    border: '1px solid #414751',
    borderRadius: 6,
  },
  searchInput: {
    flex: 1, background: 'transparent', border: 0, outline: 'none',
    color: 'var(--fg-1)', fontFamily: 'var(--font-sans)', fontSize: 12,
  },
  kbd: {
    fontFamily: 'var(--font-mono)', fontSize: 10,
    color: 'var(--fg-3)',
  },
  head: {
    fontFamily: 'var(--font-mono)', fontSize: 10,
    textTransform: 'uppercase', letterSpacing: '0.08em',
    color: 'var(--fg-3)',
    padding: '8px 14px 4px',
  },
  tree: { flex: 1, overflowY: 'auto', paddingBottom: 8 },
  row: {
    display: 'flex', alignItems: 'center', gap: 6,
    height: 26, padding: '0 10px 0 8px',
    fontSize: 13,
    cursor: 'pointer',
    userSelect: 'none',
  },
  name: { flex: 1, whiteSpace:'nowrap', overflow:'hidden', textOverflow:'ellipsis' },
  modified: { color:'#42dcd1', fontSize: 12 },
  foot: {
    display:'flex', alignItems:'center', gap:8,
    padding: '10px 14px',
    borderTop: '1px solid #373b46',
    fontSize: 12, color: 'var(--fg-2)',
  },
};

window.Sidebar = Sidebar;