extends KinematicBody2D

# https://godot3tutorials.wordpress.com/2018/03/02/part-3-multiplayer-tutorial-godot-main-multiplayer-concepts/
# https://docs.godotengine.org/en/3.1/tutorials/networking/high_level_multiplayer.html#rpc
# https://www.gamefromscratch.com/page/Godot-3-Tutorial-Networking.aspx

# Declare member variables here. Examples:
# var a = 2
# var b = "text"
const UP = Vector2(0, -1)
const ACCELERATION = 50
#const GRAVITY = 20
const MAX_SPEED = 200
#const JUMP_HEIGHT = -500
var friction = false

var motion = Vector2()

# Called when the node enters the scene tree for the first time.
func _ready():
	# Set Player's Position
#	rpc_unreliable("setPosition", Vector2(position.x, position.y))

	print("Network Master: " + str(get_network_master()))
	print("Player ID: " + str(get_tree().get_network_unique_id()))

	# The idea is the different players will be spawned at different coordinates.
	if get_network_master() == 1:
		# get_tree().get_network_unique_id()
		print("Server Position - Master: " + str(get_network_master()))

		#global_position = Vector2(300,250)
		rpc_unreliable("setPosition", Vector2(300,250), get_network_master()) # The network id should be 1 for the server
	else:
		print("Client Position - Master: " + str(get_network_master()))
		rpc_unreliable("setPosition", Vector2(500,250), get_network_master())

# sync sets for all devices including server
sync func setPosition(pos, playerid):
	# Does This Open Up A Security Hole
	# I Probably Want To Verify Client's Position From Server

	print("Player: " + str(playerid) + " Set Position: " + str(pos))

	if get_tree().get_network_unique_id() == playerid:
		print("Own ID: " + str(get_network_master()) + " Player ID: " + str(playerid))
		print("Caller ID: " + str(get_tree().get_rpc_sender_id())) # What is the caller ID? It just returns 0 for me...
		global_position = pos

# Called every frame. 'delta' is the elapsed time since the previous frame.
func _physics_process(_delta):
	if is_network_master():
		if Input.is_key_pressed(KEY_W):
			#print("Up")
			motion.y = max(motion.y - ACCELERATION, -MAX_SPEED)
		elif Input.is_key_pressed(KEY_S):
			#print("Down")
			motion.y = min(motion.y + ACCELERATION, MAX_SPEED)
		else:
			friction = true;
			#$Sprite.play("Idle");

		if Input.is_key_pressed(KEY_A):
			#print("Left")
			motion.x = max(motion.x - ACCELERATION, -MAX_SPEED)
		elif Input.is_key_pressed(KEY_D):
			#print("Right")
			motion.x = min(motion.x + ACCELERATION, MAX_SPEED)
		else:
			friction = true;
			#$Sprite.play("Idle");

		if friction == true:
			motion.x = lerp(motion.x, 0, 0.2)
			motion.y = lerp(motion.y, 0, 0.2)
			friction = false

		rpc_unreliable("movePlayer", motion)
		motion = move_and_slide(motion, UP)

# puppet (formerly slave) sets for all devices except server
puppet func movePlayer(mot):
	motion = move_and_slide(mot, UP)