local M = {}

function M:peek()
	local folder = cx.active.preview.folder
	if not folder or folder.cwd ~= self.file.url then
		return
	end

	local bound = math.max(0, #folder.files - self.area.h)
	if self.skip > bound then
		return ya.manager_emit("peek", { bound, only_if = self.file.url, upper_bound = true })
	end

	if #folder.files == 0 then
		return ya.preview_widgets(self, {
			ui.Paragraph(self.area, { ui.Line(folder.stage.is_loading and "Loading..." or "No items") })
				:align(ui.Paragraph.CENTER),
		})
	end

	local items = {}
	for _, f in ipairs(folder.window) do
		local entity = Entity:new(f)
		items[#items + 1] = ui.ListItem(entity:render()):style(entity:style())
	end

	ya.preview_widgets(self, {
		ui.List(self.area, items),
		table.unpack(Marker:new(self.area, folder):render()),
	})
end

function M:seek(units)
	local folder = cx.active.preview.folder
	if folder and folder.cwd == self.file.url then
		local step = math.floor(units * self.area.h / 10)
		local bound = math.max(0, #folder.files - self.area.h)
		ya.manager_emit("peek", {
			ya.clamp(0, cx.active.preview.skip + step, bound),
			only_if = self.file.url,
		})
	end
end

return M