--  Crit simulator to estimate killing time based on attack damage, speed and crit rates.

critSim = {}
critSim.Simulate = function(attack, critRate)
	if not attack then
		attack = critSim.A
	end
	if not critRate then
		critRate = critSim.critRates.Penwize
	end
	if attack.Damage <= 0 then
		cecho("<tomato>Can't simulate non-positive damage!")
	end

	local critTable = {}
	local critTotal = 0
	for k,v in pairs(critRate) do
		critTotal = critTotal+v
	end
	critTable[2] = critTotal
	critTable[4] = critTable[2]+critRate[4]
	critTable[8] = critTable[4]+critRate[8]
	critTable[16] = critTable[8]+critRate[16]
	critTable[32] = critTable[16]+critRate[32]

	local time = 0
	local kills = 0
	local damage = 0
	local multiplier
	local roll
	local hits = 0
	math.randomseed(critSim.seed)
	while(kills < critSim.killCount) do
		roll = math.random()*100
		if roll < critTable[32] then
			multiplier = 32
		elseif roll < critTable[16] then
			multiplier = 16
		elseif roll < critTable[8] then
			multiplier = 8
		elseif roll < critTable[4] then
			multiplier = 4
		elseif roll < critTable[2] then
			multiplier = 2
		else
			multiplier = 1
		end
		damage = damage + (attack.Damage*multiplier)
		hits = hits + 1
		time = time + attack.Speed
		if damage > critSim.mobHealth then
			kills = kills + 1
			damage = 0
		end
	end
	cecho(string.format("<white><green>%3dd<white> / <green>%0.1fs<white> = <green>%0.1f dps",attack.Damage,attack.Speed,(attack.Damage/attack.Speed)))
	cecho(string.format("<white> needed <tomato>%5d<white> hits to kill <cyan>%4d<white> mobs in <yellow>%6d<white>s =",hits,kills,time))
	cecho(string.format("<gold> %1.2f <white>kills / min.\n",kills/(time/60)));
end
critSim.SimulateMultiple = function(critRate)
	if not critRate then
		critRate = critSim.critRates.Penwize
	end
	local topDamage = 200
	local targetDPS = 50
	local damage
	for i=1,(topDamage-50+1),5 do
		damage = (topDamage+1)-i
		critSim.Simulate({
			["Damage"] = damage,
			["Speed"] = (damage/targetDPS)},
			critRate)
	end
end
critSim.SimAll = function()
	cecho("<white>Simulating with Penwize-level crits:\n")
	critSim.SimulateMultiple(critSim.critRates.Penwize)
	cecho("<white>=======================================\n")
	cecho("<white>Simulating with artied level 104 dragon crits:\n")
	critSim.SimulateMultiple(critSim.critRates.ArtieDragon104)
	cecho("<white>=======================================\n")
	cecho("<white>Simulating with low estimated crit rate:\n")
	critSim.SimulateMultiple(critSim.critRates.LowEstimate)
	cecho("<white>=======================================\n")
	cecho("<white>Simulating with zero crits:\n")
	critSim.SimulateMultiple(critSim.critRates.Zero)
	cecho("<white>=======================================\n")
end

critSim.seed = 1234
critSim.mobHealth = 2000
critSim.killCount = 1000



critSim.A = {
	Damage = 100,
	Speed = 2
}
critSim.critRates = {}
critSim.critRates.Penwize = {
	[2] = 24.6,
	[4] = 13.6,
	[8] = 7.6,
	[16] = 4.2,
	[32] = 5.2
}
critSim.critRates.ArtieDragon104 = {
	[2] = 24.3,
	[4] = 11.4,
	[8] = 5.8,
	[16] = 2.69,
	[32] = 2.65
}
critSim.critRates.LowEstimate = {
	[2] = 10,
	[4] = 5,
	[8] = 2.5,
	[16] = 1.2,
	[32] = 0.6
}
critSim.critRates.Zero = {
	[2] = 0,
	[4] = 0,
	[8] = 0,
	[16] = 0,
	[32] = 0
}