local M = {}
local B = bit or bit32 or require "folk.lib.vim.bit"

local hash_str = function(str) -- djb2, https://theartincode.stanis.me/008-djb2/
	local hash = 5381
	for i = 1, #str do
		hash = B.lshift(hash, 5) + hash + string.byte(str, i)
	end
	return hash
end

function M.hash(v) -- Xor hashing: https://codeforces.com/blog/entry/85900
	local t = type(v)
	if t == "table" then
		local hash = 0
		for p, u in next, v do
			hash = B.bxor(hash, hash_str(p .. M.hash(u)))
		end
		return hash
	elseif t == "function" then
		return M.hash(v(require("folk.palettes").get_palette()))
	end
	return tostring(v)
end

return M