auto-context

  on('ui.render', { component: 'AbovePrompt' }, async ($, e, next) => {
    if (e.props.hasSurvey || e.props.view.agentId !== undefined || opts.showBand === false) return next(e)
    const attached = await read($, attachedAtom)
    if (attached === null) return next(e)
    const { Box, Text, Button } = $.ui.resolve(e)
    const below = await next(e)
    const make = { Box, Text, Button } as unknown as BandMake
    if (attached.items.length === 0) {
      return band(make, [{ key: 'auto-context-attached', tone: 'idle', title: 'auto-context', text: `nothing new to attach (${attached.skipped.join('; ')})` }], e.props.bodyColumns, below)
    }
    const list = attached.items.map(i => `+ ${i.label}`).join(', ')
    const see = { key: 'autocontext-see', label: 'See', isQuiet: true, onPress: () => void openPane($) }
    if (attached.isRemoved) {
      return band(make, [{ key: 'auto-context-attached', tone: 'idle', title: 'auto-context', text: `removed (${list}); Claude was told to ignore it`, actions: [see] }], e.props.bodyColumns, below)
    }
    const row = {
      key: 'auto-context-attached',
      tone: 'info' as const,
      title: 'auto-context',
      text: list,
      ...(attached.skipped.length > 0 ? { note: attached.skipped.join('; ') } : {}),
      actions: [see, { key: 'autocontext-remove', hotkey: 'z', label: 'Remove', onPress: () => void remove($) }],
    }
    return band(make, [row], e.props.bodyColumns, below)
  })

export function band(make: BandMake, rows: readonly BandRow[], columns: number, below?: RenderElement | null, glyphs: BandGlyphs = 'full'): RenderElement {
  const drawn = rows.map(r => bandRow(make, r, columns, glyphs))
  return make.Box({ flexDirection: 'column', children: isNothing(below) ? drawn : [...drawn, below as RenderElement] })
}

export function bandRow(make: BandMake, row: BandRow, columns: number, glyphs: BandGlyphs = 'full'): RenderElement {
  const tone = TONES[row.tone]
  const mark = glyphs === 'full' && row.icon ? row.icon[0] : tone.glyph
  const actions = row.actions ?? []
  const buttons = actions.reduce((n, a) => n + buttonWidth(a) + 1, 0)
  // a full icon (an emoji, say) may take two cells
  const markWidth = glyphs === 'full' && row.icon ? 3 : 2
  const head = row.title ? row.title.length + 3 : 0
  const tail = row.note ? row.note.length + 3 : 0
  const isStacked = actions.length > 0 && columns - markWidth - buttons - head - tail < 24
  const lines = Math.max(1, row.maxLines ?? 2)
  // the first line shares its width with the glyph, the title, the note and (beside it) the buttons; the others have it all
  const firstLine = Math.max(10, columns - markWidth - (isStacked ? 0 : buttons) - head - tail)
  const room = firstLine + (lines - 1) * Math.max(10, columns - markWidth)
  const children: RenderElement[] = []
  if (row.title) children.push(make.Text({ bold: true, children: [row.title] }), make.Text({ dimColor: true, children: [' · '] }))
  children.push(make.Text({ children: [clipText(row.text, room)] }))
  if (row.note) children.push(make.Text({ dimColor: true, children: [` · ${row.note}`] }))
  const glyph = make.Text({ color: tone.color, bold: true, children: [mark] })
  const text = make.Box({ flexShrink: 1, flexGrow: 1, children: [make.Text({ wrap: 'wrap', children })] })
  const drawn = actions.map(a =>
    make.Button({
      key: a.key,
      label: a.label,
      ...(a.hotkey ? { hotkey: a.hotkey } : {}),
      ...(a.isPrimary ? { variant: 'primary' } : {}),
      ...(a.isQuiet ? { dimColor: true } : {}),
      ...(a.isDismiss ? { role: 'dismiss' } : {}),
      onPress: a.onPress,
    }),
  )
  if (!isStacked) return make.Box({ key: row.key, flexDirection: 'row', columnGap: 1, children: [glyph, text, ...drawn] })
  return make.Box({
    key: row.key,
    flexDirection: 'column',
    children: [
      make.Box({ flexDirection: 'row', columnGap: 1, children: [glyph, text] }),
      make.Box({ flexDirection: 'row', flexWrap: 'wrap', columnGap: 1, paddingLeft: 2, children: drawn }),
    ],
  })
}

  on('ui.render', { component: 'Pane', requestId: PANE }, async ($, e) => {
    const { Box, Text, Button, Markdown } = $.ui.resolve(e)
    const attached = await read($, attachedAtom)
    const isEnabled = await isOn($)
    const t = await read($, totalsAtom)
    return (
      <Box flexDirection="column">
        <Text bold>
          auto-context <Text color={isEnabled ? 'green' : 'yellow'}>{isEnabled ? 'on' : 'off'}</Text>
          <Text dimColor>{` · ${t.prompts} ${t.prompts === 1 ? 'prompt' : 'prompts'}, ${t.items} ${t.items === 1 ? 'item' : 'items'}, ${fmtChars(t.chars)} this session · no model calls`}</Text>
        </Text>
        <Text> </Text>
        {(attached === null || attached.items.length === 0) && (
          <Text dimColor>Nothing attached to your last prompt. Say "this error", "the tests", "this file", "what you just did" or "the plan" and what it points at goes along.</Text>
        )}
        {attached !== null &&
          attached.items.map(item => (
            <Box flexDirection="column" marginBottom={1}>
              <Text bold color={attached.isRemoved ? undefined : 'cyan'} dimColor={attached.isRemoved}>
                {`+ ${item.label}${attached.isRemoved ? ' (removed)' : ''}`}
              </Text>
              <Markdown text={item.block.length > 9_000 ? `${item.block.slice(0, 9_000)}\n…` : item.block} />
            </Box>
          ))}
        <Box gap={1}>
          {attached !== null && attached.items.length > 0 && !attached.isRemoved && <Button key="remove" hotkey="z" label="Remove" onPress={() => void remove($)} />}
          <Button key="toggle" hotkey="t" label={isEnabled ? 'Turn off' : 'Turn on'} onPress={() => void toggle($)} />
          <Button key="close" hotkey="x" role="dismiss" label="Close" onPress={() => void $.ui.close({ id: PANE })} />
        </Box>
      </Box>
    )
  })