local u=require(script.Parent.stableKeys)local c=require(script.Parent.sizeOf)local N=(require(script.Parent.var128)).encode local z=newproxy(true);(getmetatable(z)).__tostring=function()return"\060\068\101\102\097\117\108\116\062"end local function r(u,c)if c~=nil then if c==u.default then return z else return c end elseif u.default~=nil then return z end error("\110\111 \118\097\108\117\101\044 \110\111 \100\101\102\097\117\108\116")end local l=nil local function s(u)return N(u)end local function L(u)if u<0 then u=u*-2+1 else u=u*2 end return N(u)end local function v(u)return string.pack("\102",u)end local function x(u)return string.pack("\100",u)end local function e(u)return N(#u)..u end local function w(u)return string.char(u and 1 or 0)end local function P(u,c)local z={}for c,N in ipairs(c)do z[c]=l(u.valueType,N)end return N(#c)..table.concat(z)end local function A(u)local N={}local z=c(u)for c=1,z,1 do local r=8*(z-c)N[c]=math.floor(u/2^r)%256 end return string.char(unpack(N))end local function C(c,N)local s=u(c.data)local L=0 local v=0 for u,N in ipairs(s)do local z=c.data[N]if z.default~=nil then v+=1 end end local x={}for u,s in ipairs(s)do local v=c.data[s]local e=r(v,N[s])if v.default~=nil then L*=2 end if e==z then L+=1 else table.insert(x,l(v,e))end end local e=""if v>0 then e=A(L)end return e..table.concat(x)end function l(u,c)if u.type=="\105\110\116"then return L(c)elseif u.type=="\117\105\110\116"then return s(c)elseif u.type=="\102\108\111\097\116"then return v(c)elseif u.type=="\100\111\117\098\108\101"then return x(c)elseif u.type=="\115\116\114\105\110\103"then return e(c)elseif u.type=="\098\111\111\108"then return w(c)elseif u.type=="\097\114\114\097\121"then return P(u,c)elseif u.type=="\109\101\115\115\097\103\101"then return C(u,c)end end return C
local stableKeys = require(script.Parent.stableKeys)
local sizeOf = require(script.Parent.sizeOf)
local encode128 = require(script.Parent.var128).encode

local Default = newproxy(true)
getmetatable(Default).__tostring = function()
	return "<Default>"
end

local function getValue(entry, value)
	if value ~= nil then
		if value == entry.default then
			return Default
		else
			return value
		end
	elseif entry.default ~= nil then
		return Default
	end
	error("no value, no default") -- todo: descriptive error referencing key
end

local encodeAny = nil

local function encodeUInt(value)
	return encode128(value)
end

local function encodeInt(value)
	if value < 0 then -- zigzag
		value = value * -2 + 1
	else
		value = value * 2
	end
	return encode128(value)
end

local function encodeFloat(value)
	return string.pack("f", value)
end

local function encodeDouble(value)
	return string.pack("d", value)
end

local function encodeString(value)
	return encode128(#value) .. value
end

local function encodeBool(value)
	return string.char(value and 1 or 0)
end

local function encodeArray(entry, value)
	local out = {}
	for i, item in ipairs(value) do
		out[i] = encodeAny(entry.valueType, item)
	end
	return encode128(#value) .. table.concat(out)
end

local function encodeFlags(flags)
	local out = {}
	local size = sizeOf(flags)
	for i = 1, size do
		local sh = 8 * (size - i)
		out[i] = math.floor(flags / 2 ^ sh) % 0x100
	end
	return string.char(unpack(out))
end

local function encodeMessage(message, content)
	local keys = stableKeys(message.data)

	local defaultFlags = 0
	local numOptionalKeys = 0
	for _, key in ipairs(keys) do
		local entry = message.data[key]
		if entry.default ~= nil then
			numOptionalKeys += 1
		end
	end

	local outBody = {}
	for _, key in ipairs(keys) do
		local entry = message.data[key]
		local value = getValue(entry, content[key])
		if entry.default ~= nil then
			defaultFlags *= 2
		end
		if value == Default then
			defaultFlags += 1
		else
			table.insert(outBody, encodeAny(entry, value))
		end
	end

	local pre = ""
	if numOptionalKeys > 0 then
		pre = encodeFlags(defaultFlags)
	end

	return pre .. table.concat(outBody)
end

function encodeAny(entry, value)
	if entry.type == "int" then
		return encodeInt(value)
	elseif entry.type == "uint" then
		return encodeUInt(value)
	elseif entry.type == "float" then
		return encodeFloat(value)
	elseif entry.type == "double" then
		return encodeDouble(value)
	elseif entry.type == "string" then
		return encodeString(value)
	elseif entry.type == "bool" then
		return encodeBool(value)
	elseif entry.type == "array" then
		return encodeArray(entry, value)
	elseif entry.type == "message" then
		return encodeMessage(entry, value)
	end
end

return encodeMessage
