local Experience = {}

--experience = 5(level before)^2
Experience.getExperienceFromLevel = function(level)
	return (5 * (level - 1)) ^ 2
end

Experience.getLevelFromExperience = function(experience)
	--x = 5y^2, solve for y
	--sqrt(x) = 5y
	--sqrt(x)/5 = y
	--add one because x is level BEFORE

	return math.floor(math.sqrt(experience) / 5) + 1
end

local ReplicatedStorage = game:GetService("ReplicatedStorage")
local into = require(ReplicatedStorage.Boilerplate.into)

Experience.getLevelRewards = function(levelRewards, level)
	local allRewards = {}

	allRewards[level] = levelRewards[tostring(level)]

	for cond,rewards in pairs(levelRewards) do --TODO: can we break this once we get to a non-"/"?
		local x = {}

		if into(cond:match("/(%d+)"), x) then
			if level % tostring(x.value) == 0 then
				allRewards[tonumber(x.value)] = rewards
			end
		end
	end

	local finish = {}

	--this could be optimized
	for levelCondition,rewards in pairs(allRewards) do
		for rewardType,rewardCount in pairs(rewards) do
			local count = rewardType:match("_NONMULT$") and rewardCount or (level / levelCondition) * rewardCount

			if rewardType:match("_NONMULT$") then
				rewardType = rewardType:sub(1, -9)
			end

			finish[rewardType] = (finish[rewardType] or 0) + count
		end
	end

	return finish
end

return Experience