-- force calculation
--------------------
totalForce = nil

local badgeRates = {
	0.5,  -- Played
	1.0,  -- Cleared
	1.02, -- Hard clear
	1.04, -- UC
	1.1   -- PUC
}

local gradeRates = {
	{["min"] = 9900000, ["rate"] = 1.05}, -- S
	{["min"] = 9800000, ["rate"] = 1.02}, -- AAA+
	{["min"] = 9700000, ["rate"] = 1},    -- AAA
	{["min"] = 9500000, ["rate"] = 0.97}, -- AA+
	{["min"] = 9300000, ["rate"] = 0.94}, -- AA
	{["min"] = 9000000, ["rate"] = 0.91}, -- A+
	{["min"] = 8700000, ["rate"] = 0.88}, -- A
	{["min"] = 7500000, ["rate"] = 0.85}, -- B
	{["min"] = 6500000, ["rate"] = 0.82}, -- C
	{["min"] =       0, ["rate"] = 0.8}   -- D
}

calculate_force = function(diff)
	local caseInsensitiveJacketPath = string.upper(diff.jacketPath);
	local isValid = string.find(caseInsensitiveJacketPath, 'SDVX') or string.find(caseInsensitiveJacketPath, 'SOUND VOLTEX')

	if not isValid then
		return 0
	end

	if #diff.scores < 1 then
		return 0
	end
	local score = diff.scores[1]
	local badgeRate = badgeRates[diff.topBadge]
	local gradeRate
    for i, v in ipairs(gradeRates) do
      if score.score >= v.min then
        gradeRate = v.rate
		break
      end
    end
	return math.floor((diff.level * 2) * (score.score / 10000000) * gradeRate * badgeRate * 10) / 1000
end

return {
    calc = calculate_force
}