SitAnywhere = SitAnywhere or {}
SitAnywhere.NET = {
	["SitWantedAng"] = 0,
	["SitRequestExit"] = 1,
}

SitAnywhere.ClassBlacklist = {
	["gmod_wire_keyboard"] = true,
	["prop_combine_ball"] = true
}

SitAnywhere.DoNotParent = {
	["yava_chunk"] = true
}

SitAnywhere.ModelBlacklist = {}

local EMETA = FindMetaTable("Entity")

function SitAnywhere.GetAreaProfile(pos, resolution, simple)
	local filter = player.GetAll()
	local dists = {}
	local distsang = {}
	local ang_smallest_hori = nil
	local smallest_hori = 90000
	local angPerIt = (360 / resolution)
	
	for I = 0, 360, angPerIt do
		local rad = math.rad(I)
		local dir = Vector(math.cos(rad), math.sin(rad), 0)
		local trace = util.QuickTrace(pos + dir * 20 + Vector(0,0,5), Vector(0,0,-15000), filter)
		trace.HorizontalTrace = util.QuickTrace(pos + Vector(0,0,5), dir * 1000, filter)
		trace.Distance  =  trace.StartPos:Distance(trace.HitPos)
		trace.Distance2 = trace.HorizontalTrace.StartPos:Distance(trace.HorizontalTrace.HitPos)
		trace.ang = I

		if (not trace.Hit or trace.Distance > 14) and (not trace.HorizontalTrace.Hit or trace.Distance2 > 20) then
			if simple then return true end
			table.insert(dists, trace)
		end
		
		if trace.Distance2 < smallest_hori and (not trace.HorizontalTrace.Hit or trace.Distance2 > 3) then
			smallest_hori = trace.Distance2
			ang_smallest_hori = I
		end
		distsang[I] = trace
	end

	if simple then return false end
	return dists, distsang, ang_smallest_hori, smallest_hori
end

function SitAnywhere.CheckValidAngForSit(pos, surfaceAng, ang)
	local rad = math.rad(ang)
	local dir = Vector(math.cos(rad), math.sin(rad), 0)
	local trace2 = util.TraceLine({
		start = pos - dir * (20 - .5) + surfaceAng:Forward() * 5,
		endpos = pos - dir * (20 - .5) + surfaceAng:Forward() * -160,
		filter = player.GetAll()
	})

	local hor_trace = util.TraceLine({
		start = pos + Vector(0, 0, 5),
		endpos = pos + Vector(0, 0, 5) - dir * 1600,
		filter = player.GetAll()
	})

	return hor_trace.StartPos:Distance(hor_trace.HitPos) > 20 and trace2.StartPos:Distance(trace2.HitPos) > 14
end

-- Настройки через ix.config
if SERVER then
	ix.config.Add("sitEntMode", 3, "Режим сидения на объектах: 0=нет, 1=только мировые, 2=свои+мировые, 3=любые", nil, {
		data = {min = 0, max = 3},
		category = "Sit Anywhere"
	})
end

local function GetSitOnEntsMode()
	if SERVER then
		return ix.config.Get("sitEntMode", 3)
	end
	return 3
end

local blacklist = SitAnywhere.ClassBlacklist
local model_blacklist = SitAnywhere.ModelBlacklist

function SitAnywhere.ValidSitTrace(ply, EyeTrace)
	if not EyeTrace.Hit then return false end
	if EyeTrace.HitPos:Distance(EyeTrace.StartPos) > 100 then return false end
	
	local t = hook.Run("CheckValidSit", ply, EyeTrace)
	if t == false or t == true then
		return t
	end

	local mode = GetSitOnEntsMode()
	
	if not EyeTrace.HitWorld and mode == 0 then return false end
	if not EyeTrace.HitWorld and blacklist[string.lower(EyeTrace.Entity:GetClass())] then return false end
	if not EyeTrace.HitWorld and EyeTrace.Entity:GetModel() and model_blacklist[string.lower(EyeTrace.Entity:GetModel())] then return false end

	if EMETA.CPPIGetOwner and mode >= 1 then
		if mode == 1 then
			if not EyeTrace.HitWorld then
				local owner = EyeTrace.Entity:CPPIGetOwner()
				if type(owner) == "Player" and owner ~= nil and owner:IsValid() and owner:IsPlayer() then
					return false
				end
			end
		elseif mode == 2 then
			if not EyeTrace.HitWorld then
				local owner = EyeTrace.Entity:CPPIGetOwner()
				if type(owner) == "Player" and owner ~= nil and owner:IsValid() and owner:IsPlayer() and owner ~= ply then
					return false
				end
			end
		end
	end
	
	return true
end

local seatClass = "prop_vehicle_prisoner_pod"
local PMETA = FindMetaTable("Player")

function PMETA:GetSitters()
	local seats, holders = {}, {}

	local function processSeat(seat, depth)
		depth = (depth or 0) + 1
		if IsValid(seat:GetDriver()) and seat:GetDriver() ~= self then
			table.insert(seats, seat)
		end
		for _, v in pairs(seat:GetChildren()) do
			if IsValid(v) and v:GetClass() == seatClass and IsValid(v:GetDriver()) and #v:GetChildren() > 0 and depth <= 128 then
				processSeat(v, depth)
			end
		end
	end

	local plyVehicle = self:GetVehicle()
	if IsValid(plyVehicle) and plyVehicle:GetClass() == seatClass then
		processSeat(plyVehicle)
	end

	for _, v in pairs(self:GetChildren()) do
		if IsValid(v) and v:GetClass() == seatClass then
			processSeat(v)
		end
	end

	for _, v in pairs(ents.FindByClass("sit_holder")) do
		if v.GetTargetPlayer and v:GetTargetPlayer() == self then
			table.insert(holders, v)
			if v.GetSeat and IsValid(v:GetSeat()) then
				processSeat(v:GetSeat())
			end
		end
	end
	
	return seats, holders
end

function PMETA:IsPlayerSittingOn(ply)
	local seats = ply:GetSitters()
	for _,v in pairs(seats) do
		if IsValid(v:GetDriver()) and v:GetDriver() == self then return true end
	end
	return false
end

function PMETA:GetSitting()
	if not IsValid(self:GetVehicle()) then return false end
	local veh = self:GetVehicle()
	if veh:GetNWBool("playerdynseat", false) then
		local parent = veh:GetParent()
		if IsValid(parent) and parent:GetClass() == "sit_holder" then
			return veh, parent
		else
			return veh
		end
	end
	return false
end

function PMETA:ExitSit()
	if CLIENT then
		if self ~= LocalPlayer() then return end
		net.Start("SitAnywhere")
			net.WriteInt(SitAnywhere.NET.SitRequestExit, 4)
		net.SendToServer()
	else
		local seat, holder = self:GetSitting()
		SafeRemoveEntity(seat)
		SafeRemoveEntity(holder)

		if SitAnywhere.GroundSit and self:GetNWBool("SitGroundSitting", false) then
			self:SetNWBool("SitGroundSitting", false)
		end
	end
end

function EMETA:IsSitAnywhereSeat()
	if self:GetClass() ~= "prop_vehicle_prisoner_pod" then return false end
	if SERVER and self.playerdynseat then return true end
	return self:GetNWBool("playerdynseat", false)
end