local M = {}

local _cache = {}

---@param buffer integer
function M:cache_buffer(buffer, value)
	_cache[buffer] = value
end

---@param buffer integer
function M:invalidate_buffer(buffer)
	_cache[buffer] = nil
end

---@param buffer integer
---@return string[]|nil
function M:get_cache(buffer)
	return _cache[buffer]
end

local _listening_buffers = {}

---@param buffer integer
function M:register_listeners(buffer)
	if _listening_buffers[buffer] then
		return
	end

	_listening_buffers[buffer] = true

	vim.api.nvim_buf_attach(buffer, false, {
		on_lines = function()
			self:invalidate_buffer(buffer)
		end,
		on_detach = function()
			self:invalidate_buffer(buffer)
			_listening_buffers[buffer] = nil
		end,
	})
end

return M