Header = {}

function Header:cwd()
	local cwd = cx.active.current.cwd

	local span
	if not cwd.is_search then
		span = ui.Span(utils.readable_path(tostring(cwd)))
	else
		span = ui.Span(string.format("%s (search: %s)", utils.readable_path(tostring(cwd)), cwd.frag))
	end
	return span:style(THEME.manager.cwd)
end

function Header:tabs()
	local spans = {}
	for i = 1, #cx.tabs do
		local text = i
		if THEME.manager.tab_width > 2 then
			text = utils.truncate(text .. " " .. cx.tabs[i]:name(), THEME.manager.tab_width)
		end
		if i == cx.tabs.idx + 1 then
			spans[#spans + 1] = ui.Span(" " .. text .. " "):style(THEME.manager.tab_active)
		else
			spans[#spans + 1] = ui.Span(" " .. text .. " "):style(THEME.manager.tab_inactive)
		end
	end
	return ui.Line(spans)
end

function Header:render(area)
	local chunks = ui.Layout()
		:direction(ui.Direction.HORIZONTAL)
		:constraints({ ui.Constraint.Percentage(50), ui.Constraint.Percentage(50) })
		:split(area)

	local left = ui.Line { self:cwd() }
	local right = ui.Line { self:tabs() }
	return {
		ui.Paragraph(chunks[1], { left }),
		ui.Paragraph(chunks[2], { right }):align(ui.Alignment.RIGHT),
	}
end