local U = require "scriptbank\\utillib"
local deg  = math.deg
local rad  = math.rad
local atan = math.atan2

local function wrapAng( ang )
	if ang > 180 then
		return ang - 360
	elseif
	   ang <= -180 then
		return ang + 360
	end
	return ang
end

local function getRealWorldYangle( xa, ya, za )  -- Euler in degrees, returns degrees 
	-- Tricky to explain but basically we need world angle as 180 .. -180 for Bullet
	-- Engine angles, whereas the Euler angle for an entity
    -- returned by GetObjectPosAng is not.
	-- In order to get the 'real-world' equivalent we need to do some math.

	-- first rotate a unit 'facing forward' vector by the Euler angles
	local xv, _, zv = U.Rotate3D( 0, 0, 1,  rad( xa ), rad( ya ), rad ( za ) )
	
	-- now work out the angle from the x and z components of the result
	local ang = -deg( atan( xv, zv ) )

	return wrapAng( ang ) 
end	

local state = {}
local epressed = 0
local camPosX = 0
local camPosY = 0
local camPosZ = 0
local camFollowDist = 80
local camFollowHeight = 40
local camFollowAngleX = 5
function rotate_camera_init(e)
	state[e] = "idle"
end 

function rotate_camera_main(e)
	if state[e] == "idle" then 
		if GetPlayerDistance(e) < 200 then 
			PromptLocal(e,"Fix Camera?")
			if g_KeyPressE == 1 and epressed == 0 then 
				epressed = 1
				state[e] = "fixed"	
				SetCameraOverride(3)
			end 
		end 
	elseif state[e] == "fixed" then 
		if g_KeyPressE == 1 and epressed == 0 then 
			epressed = 1
			state[e] = "idle"
			SetCameraOverride(0)
		end 
		CollisionOff(e)
		temp = 0
		if g_KeyPressA == 1 then 
			temp = -1
		elseif g_KeyPressD == 1 then 
			temp = 1
		end 
		SetRotation(e,g_Entity[e]['anglex'],GetEntityAngleY(e)+temp,g_Entity[e]['anglez'])
		if g_KeyPressW == 1 then 
			MoveForward(e,160)
		elseif g_KeyPressS == 1 then 
			MoveForward(e,-160)
		end 
		CollisionOn(e)
		SetCameraAngle(0,camFollowAngleX,GetEntityAngleY(e),0)
		new_y = math.rad(GetEntityAngleY(e))
		camPosX = g_Entity[e]['x'] + (math.sin(new_y) * -camFollowDist)
		camPosY = GetEntityPositionY(e) + camFollowHeight
		camPosZ = g_Entity[e]['z'] + (math.cos(new_y) * -camFollowDist)
		SetCameraPosition(0,camPosX,camPosY,camPosZ)			
	end 
	if g_KeyPressE == 0 then 
		epressed = 0
	end 
end 

function rotate_camera_preexit(e)
end

function rotate_camera_exit(e)

end