-- Dark was here.

local nearplayer 
local Players = game:GetService("Players")
function MakeAMove()
	nearplayer = false
	if (tick()-holdOrder < holdDuration) then return end
	if stance == "wander" then
		
		for _,Player in next, Players:GetPlayers() do 
			if Player.Character and Player.Character.PrimaryPart then
				local dis = (Player.Character.PrimaryPart.CFrame.Position - root.CFrame.Position).Magnitude
				if dis >= 500 then
					nearplayer = true
					break
				end
			end
		end

		if nearplayer then
			task.wait(math.random(1, 1 + 1/2))
			return
		end
		
		local collisionRay = Ray.new(
			(root.CFrame*CFrame.new(0,100,-15)).p ,
			Vector3.new(0,-1000,0)
		)
		local part,pos,norm,mat = workspace:FindPartOnRayWithIgnoreList(collisionRay,shark:GetDescendants())
		--local asdf = Instance.new("Part")
		--asdf.Anchored = true
		--asdf.Size = Vector3.new(2,2,2)
		--asdf.CFrame = CFrame.new(pos)
		--asdf.Parent = workspace
		if part then
			if part == workspace.Terrain and mat ~= Enum.Material.Water then
				-- redirect
				destination =( (root.CFrame*CFrame.Angles(0,math.rad(math.random(90,270)),0))*CFrame.new(0,0,-40)).p
				holdOrder = tick()
			elseif part == workspace.Terrain and mat == Enum.Material.Water then
				if (tick()-lastAdjustment) > nextAdjustment then
					lastAdjustment = tick()
					nextAdjustment = math.random(10,30)
					destination =( (root.CFrame*CFrame.Angles(0,math.rad(math.random(0,359)),0))*CFrame.new(0,0,-40)).p
					holdDuration = 2
					holdOrder = tick()
				else
					destination = (root.CFrame*CFrame.new(0,0,-25)).p
				end

			end
		elseif part and part~= workspace.Terrain then
			destination = (root.CFrame*CFrame.new(0,0,-25)).p
		elseif not part then
			destination = ((root.CFrame*CFrame.Angles(0,math.rad(180),0))*CFrame.new(0,0,-40)).p
			holdDuration = 4
			holdOrder = tick()
		end
		bodyPos.Position = Vector3.new(destination.X,-6,destination.Z)
		bodyGyro.CFrame = CFrame.new(CFrame.new(root.CFrame.p.X,-6,root.CFrame.p.Z).p,CFrame.new(destination.X,-6,destination.Z).p)

	elseif stance == "attack" then
		bodyPos.Position = destination
		bodyGyro.CFrame = CFrame.new(root.Position,Vector3.new(destination.X,root.Position.Y,destination.Z))

		if (shark.PrimaryPart.Position-target.PrimaryPart.Position).magnitude < 10 then
			-- lunge and hold
			if target.Humanoid.SeatPart then
				game.ReplicatedStorage.Events.NPCAttack:Fire(target.Humanoid.SeatPart.Parent,math.random(5,15))
			else
				game.ReplicatedStorage.Events.NPCAttack:Fire(game.Players:GetPlayerFromCharacter(target),25)
			end

			shark.Head.SharkEat:Play()
			local emitter = game.ReplicatedStorage.Particles.Teeth:Clone()
			emitter.Parent = shark.Head
			emitter.EmissionDirection = Enum.NormalId.Top
			wait()
			emitter:Emit(1)




			holdOrder = tick()
			holdDuration = 2
		end

	end
end -- end of MakeAMove()
MakeAMove()


local scanSurroundings = coroutine.wrap(function()
	while true do
		stance = "wander"
		local surroundingParts = workspace:FindPartsInRegion3WithIgnoreList(Region3.new(
			shark.PrimaryPart.Position+Vector3.new(-60,-3,-60),
			shark.PrimaryPart.Position+Vector3.new(60,10,60)),
			shark:GetChildren())
		for _,v in next,surroundingParts do
			if v.Parent:FindFirstChild("Humanoid") and v.Parent.Humanoid.Health > 0 then
				-- we have a player in the radius
				local playerRay = Ray.new(v.Position+Vector3.new(0,10,0),Vector3.new(0,-50,0))
				local part,pos,norm,mat = workspace:FindPartOnRay(playerRay,v.Parent)
				if part == workspace.Terrain and mat ~= Enum.Material.Water then
					-- don't set to attack
				else
					stance = "attack"
					target = v.Parent
					-- destination = v.Parent.PrimaryPart.Position
					destination = (CFrame.new(root.CFrame.p,Vector3.new(v.Parent.PrimaryPart.CFrame.p.x, -9,v.Parent.PrimaryPart.CFrame.p.z))*CFrame.new(0,0,-50)).p
					break
					-- change y height of shark
				end
			end
		end

		if stance == "wander" then
			scanInterval = 1
			target = nil
			MakeAMove()
		elseif stance == "attack" then
			scanInterval = .1
			MakeAMove()
		end

		wait(scanInterval)
	end -- end of wtd
end)
scanSurroundings()


