--[[
| This file was obtained through the combined efforts
| of Madbluntz & Plymouth Antiquarian Society.
|
| Credits: lifestorm, Gregory Wayne Rossel JR.,
| 	Maloy, DrPepper10 @ RIP, Atle!
|
| Visit for more: https://plymouth.thetwilightzone.ru/
--]]


ITEM.name = "#00000's Identity Card"
ITEM.model = Model("models/n7/props/n7_cid_card.mdl")
ITEM.description = "A citizen identification card assigned to %s, CID #%s.\n\nCard Number: %s\nGenetic description:\n%s.\n\nThis card is property of the Combine Civil Administration. Illegal possession and identity fraud are punishable by law and will result in prosecution by Civil Protection. If found, please return this card immediately to the nearest Civil Protection team."
ITEM.category = "Combine"
ITEM.iconCam = {
	pos = Vector(0, 0, 10),
	ang = Angle(90, 90, 0),
	fov = 45,
}

if (CLIENT) then
	function ITEM:PaintOver(item, w, h)
		surface.SetDrawColor(110, 255, 110, 100)
		surface.DrawRect(w - 14, h - 14, 8, 8)
	end
end

function ITEM:GetName()
	return "#"  ..  self:GetData("cid", "00000")  ..  "'s Identity Card"
end

function ITEM:GetDescription()
	return string.format(self.description,
		self:GetData("name", "Nobody"),
		self:GetData("cid", "00000"),
		self:GetData("cardNumber", "00-0000-0000-00"),
		self:GetData("geneticDesc", "N/A | N/A | N/A EYES | N/A HAIR"))
end

local prime = 9999999787 -- prime % 4 = 3! DO NOT CHANGE EVER
local offset = 100000 -- slightly larger than sqrt(prime) is ok. DO NOT CHANGE EVER
local block = 100000000
local function generateCardNumber(id)
	id = (id + offset) % prime

	local cardNum = 0

	for _ = 1, math.floor(id/block) do
		cardNum = (cardNum + (id * block) % prime) % prime
	end

	cardNum = (cardNum + (id * (id % block) % prime)) % prime

	if (2 * id < prime) then
		return cardNum
	else
		return prime - cardNum
	end
end

function ITEM:OnInstanced()
	local cardNum = Schema:ZeroNumber(generateCardNumber(self:GetID()), 10)

	self:SetData("cardNumber", string.utf8sub(cardNum, 1, 2) .. "-" .. string.utf8sub(cardNum, 3, 6) .. "-" .. string.utf8sub(cardNum, 7, 10) .. "-" .. Schema:ZeroNumber(cardNum % 97, 2))
end