local AI = {}
AI.Title = "Follow Player Car Keys"
AI.Author = "Sakarias88"
AI.IsState = true --If this is true it won't be added to the stool

AI.Owner = nil -- This will be the entity that uses the AI

----------------- Variables
AI.CollisionTimer = CurTime()
AI.ColReverseTimer = CurTime()
AI.whiskerHit = false

AI.KeepTargetDistance = 400
AI.Fails = 0

function AI:Init() --Will only run once
	if self.Owner:IsConnectedToSCar() then
		local SCar = self.Owner:GetSCar()
		SCar:DoUnlockEffect()
	end
end

function AI:FastThink()
end


function AI:Think() --Runs 5 times per sec

	if self.Owner:IsConnectedToSCar() then

		local SCar = self.Owner:GetSCar()
		if self.CollisionTimer < CurTime() then


			if ValidEntity(self.Owner.SpawnedBy) then
				self.Owner:SetTarget( self.Owner.SpawnedBy )
			end



			if self.Owner:HasTarget() then

				local target = self.Owner:GetTarget()
				local dist = SCar:GetPos():Distance( target:GetPos() )

				local leftOrRight, frontOrRear = self.Owner:GetTargetSide()

				if dist > self.KeepTargetDistance then
					SCar:HandBrakeOff()

					local vel = SCar:GetPhysicsObject():GetVelocity():Length()

					if vel < 300 then
						if frontOrRear == 1 then
							SCar:GoForward()
						else
							SCar:GoBack()
						end
					elseif vel > 300 and vel < 400 then
						SCar:GoNeutral()
					else
						if frontOrRear == 1 then
							SCar:GoBack()
						else
							SCar:GoForward()
						end
					end



					self.Owner:UseTurning()
				else
					self:KillOperation( SCar )
					return
				end
			else
				SCar:GoNeutral()
				SCar:NotTurning()
			end


		else
			local SCar = self.Owner:GetSCar()

			if self.ColReverseTimer > CurTime() then
				SCar:GoBack()

				self.Owner:UseInvertedTurning()
			elseif self.CollisionTimer > CurTime() then
				SCar:GoForward()

				if self.whiskerHit then
					self.Owner:UseTurning()
					self.whiskerHit = false
				end
			end
		end


		if self.CollisionTimer < CurTime()&& self.Owner:HasTarget() && self.Owner:IsStuck() then
			self.CollisionTimer = CurTime() + 2
			self.ColReverseTimer = CurTime() + 0.7
			self.Fails = self.Fails + 1

			if self.Fails > 3 then
				self:KillOperation( SCar )
				return
			end

		end
	end
end

function AI:KillOperation( SCar )
	SCar:GoNeutral()
	SCar:NotTurning()
	SCar:HandBrakeOn()
	self.Owner:SetFace( "neutral" )
	self.Owner:Remove()

	timer.Create( "SCarSomeAiTimer"..SCar:EntIndex(), 1, 1, function()
		SCar:DoLockEffect()
	end )
end

function AI:OnTakeDamage(dmg)
end

--This is the PhysicsCollide( data, phys ) from the SCar but passed on here
function AI:CarCollide( data, phys )
end

--Runs whenever a player enters the scar
function AI:PlayerEnteredSCar( player )
	self:KillOperation( SCar )
end

--Whiskers
function AI:LeftWhiskerHit()
	self.whiskerHit = true
end

function AI:RightWhiskerHit()
	self.whiskerHit = true
end

function AI:FrontWhiskerHit()

end

function AI:RearWhiskerHit()

end



SCarAiHandler:registerAI( AI )

---------------------AI help funcs

--self.Owner:UseWhiskers( use ) --bool
--When using MoveAwayFromPos(), GoToPositionition(), MoveToTarget(), MoveAwayFromTarget(), UseTurning() or UseInvertedTurning() the car
--will automatically try to avoid obstacles and stay away from walls.
--Off by default


--self.Owner:SetWhiskerLength( length ) --Number
--Sets the length of the whiskers


--self.Owner:SetTarget( newTarget ) --Entity
--Sets the target


--self.Owner:SetAI( newAI ) --AI object
--You can fetch AI objects from the SCarAiHandler.
--Example: self.Owner:SetAI( SCarAiHandler.GetAiByName( "Follow Player" ) )
--Will change the AI to the Follow Player AI.
--It's fully possible to split up a bunch of AI's into states and then make the states automatically change to other states
--and therefore keeping it very simple.
--If you want to create an AI as a "state" you will have to set AI.IsState = true.
--If AI.IsState == true it won't be added to the AI stool.


--self.Owner:IsStuck()
--Returns true when the  AI thiks it's stuck.
--Basically it will always return true if it have stayed still for too long.


--self.Owner:HasTarget()
--Returns true if the AI has a target


--self.Owner:IsConnectedToSCar()
--Returns true if the ai is connected to a scar


--self.Owner:GetTarget()
--Returns the target


--self.Owner:GetSCar()
--Returns the SCar


--self.Owner:TargetIsNode()
--Returns true if the target is a node


--self.Owner:GetTargetSide()
-- Returns two integers. The first one is which side of the car the target is located and the second integer says if it's in front or behind the SCar
--Right side: First int = 1
--Left side: First int = -1
--Target is in the middle: First int = 0
--Front: Second int = 1
--Rear: Second int = -1
--Target is in the middle of the right or left side: Second int = 0


--self.Owner:UseTurning()
-- Will turn left if the target is at the SCars left side and right if the target is at the SCars right side


--self.Owner:UseInvertedTurning()
-- Will turn right if the target is at the SCars left side and turn left if the target is at the SCars right side


--self.Owner:GoToPosition( move , pos, distanceComplete ) -- bool, Vector, number
--Makes the car go towards a position whitout obstacle avoidance.
--The car will try to go to the position utill it's whithin the distanceComplete radius.
--Setting move to false will interrupt this function.
--Using MoveAwayFromPos(), MoveToTarget() or MoveAwayFromTarget() will interrupt this function.


--MoveAwayFromPos( move, pos, distanceComplete ) --bool, vector, number
--Makes the car move away from the position utill it's outside the distanceComplete radius.
--Setting move to false will interrupt this function.
--Using GoToPosition(), MoveToTarget() or MoveAwayFromTarget() will interrupt this function.


--self.Owner:HasCompletedGoToPosition()
--Will always return true unless the car is on it's way to a position


--self.Owner:MoveToTarget( move, distanceComplete ) --bool, number
--Makes the car go towards the target whitout obstacle avoidance.
--Setting move to false will interrupt this function.
--Using GoToPosition(), MoveAwayFromPos() or MoveAwayFromTarget() will interrupt this function.


--MoveAwayFromTarget( move, distanceComplete ) --bool, number
--Makes the car move away from the target utill it's outside the distanceComplete radius.
--Setting move to false will interrupt this function.
--Using GoToPosition(), MoveAwayFromPos() or MoveToTarget() will interrupt this function.

--self.Owner:HasCompletedMoveToTarget()
--Will always return true unless the car is on it's way to the target

--self.Owner:AutoLookAtTarget( lookAt )
--Is set to true by default.
--If it's true it will automatically look at it's target if it has one.
--If you want the AI to look at anything else than the target you should switch this one of

--self.Owner:LookAtPosition( pos )
--Will force it to look at a position even if AutoLookAtTarget is set to true

---------------------Useful SCar funcs
--SCar:GoForward()
--Makes the SCar go forward

--SCar:GoBack()
--Makes the car go backwards

--SCar:GoNeutral()
--No throttle

--SCar:TurnLeft()
--Turn left

--SCar:TurnRight()
--Turn right

--SCar:NotTurning()
--Return steering to norlam ( not turning left or right)

--SCar:HandBrakeOn()
--Hand brake on

--SCar:HandBrakeOff()
--Hand brake off

--SCar:InitiateTurbo()
--Start turbo

--SCar:FrontLightsOn( col, alpha, rtOn )
--This function takes 3 arguments. The two first ones are strings and the last one is a bool
--Example: SCar:FrontLightsOn( "255 255 255" , "150" , true )

--SCar:FrontLightsOff()
--Turns front lights off

--SCar:DoBurnout( force )
--Make the car do a burnout. The force is the amount of force used to make the wheels spin.

--SCar:ToggleHydraulics()
--Toggle the car hydraulics on and off.