extends RigidBody

# Game
export var team = "RED"
export (int) var health = 100
var weapon = null
var world

# Camera
export(float) var mouse_sensitivity = 12.0
export(float) var FOV = 90.0
var mouse_axis := Vector2()
onready var head: Spatial = $Neck/Head
onready var neck: Spatial = $Neck

# Move
var velocity := Vector3()
var direction := Vector3()
var move_axis := Vector2()
var floorspeed := Vector3()
var jumping = false
var can_jump = true
onready var nav = $NavigationAgent

# Walk
const FLOOR_MAX_ANGLE: float = deg2rad(46.0)
export(float) var jump_height = 400.0
var in_water : bool = false
var swim_speed : float = 450.0
var climb_speed : float = 5.0

# Control
var controlling_machine = false #whether character is riding/controlling something
var machine = null
export var is_player = false #whether character is currently controlled by a player
var ladder_m = null

#physics
var player_state : PhysicsDirectBodyState
var is_on_floor:bool
var floor_normal : Vector3 = Vector3.UP
var acceleration = 80.0
export(int) var walk_speed = 5
var c_friction = 4.0
var air_control = 0.3

# Called when the node enters the scene tree
func _ready() -> void:
	weapon = preload("res://scenes/weapons/w_Rockets.tscn").instance()
	add_child(weapon)
	world = get_tree().get_root().get_node("GAMEWORLD")

	$"%UseRay".add_exception(self)
	$"%MeleeRay".add_exception(self)
	$"%UseRay".add_exception($AreaDetect)
	$"%MeleeRay".add_exception($AreaDetect)

func get_init_info():
	return {"linear_velocity" : linear_velocity, "angular_velocity" : angular_velocity, "controlling_machine" : controlling_machine, "team" : team, "health" : health, "nametag" : $Nametag.text}

func mp_init(init_info):
	for variable in init_info.keys():
		set(variable, init_info[variable])
	$Nametag.text = init_info["nametag"]

remote func set_phys_transform(trfrm, lvel):
	transform = trfrm
	linear_velocity = lvel

# Called every frame. 'delta' is the elapsed time since the previous frame
func _process(_delta: float) -> void:
	if is_player and !world.is_chatting:
		if Input.is_action_just_pressed("use"):
			initiate_use()

		if controlling_machine:
			if Input.is_action_just_pressed("fire"):
				machine.attack1()
			if Input.is_action_just_pressed("fire2"):
				machine.attack2()
			machine.direction_input(Input.get_action_strength("move_forward"),Input.get_action_strength("move_backward"), Input.get_action_strength("move_right"),Input.get_action_strength("move_left"), Input.get_action_strength("alt_right"),Input.get_action_strength("alt_left"))
			machine.misc_input(Input.get_action_strength("move_duck"),Input.get_action_strength("move_jump"),Input.get_action_strength("move_walk"))
			machine.mouse_input(Input.get_action_strength("fire"), Input.get_action_strength("fire3"),Input.get_action_strength("fire2"))
		else:
			jumping = Input.get_action_strength("move_jump")
			if Input.is_action_just_pressed("fire"):
				weapon.attack1()
			move_axis.x = Input.get_action_strength("move_forward") - Input.get_action_strength("move_backward")
			move_axis.y = Input.get_action_strength("move_right") - Input.get_action_strength("move_left")


func initiate_use():
	if controlling_machine:
		machine.relinquish_control()
		return
	if ladder_m != null:
		leave_ladder()
		return
	if $"%UseRay".is_colliding():
		var area_c = $"%UseRay".get_collider()
		match area_c.name:
			"SteerArea":
				world.rpc_id(1, "_call_on_server", "_client_request_control_vehicle", {"id" : world.client_id, "machine_path" : area_c.get_parent().get_path(), "char_name" : name})
			"LadderArea":
				mount_ladder(area_c.get_parent())
			"TugArea":
				pass
			"PickupArea":
				pass
			_:
				pass

remotesync func set_net_owner(owner_id):
	$Nametag.text = ""
	set_network_master(owner_id)
	if owner_id != 1:
		$Nametag.text = world.players_info[owner_id][0]
	if get_tree().get_network_unique_id() != 1:
		if owner_id == world.client_id:
			$Nametag.visible = false
			world.player_char = self
			is_player = true
			world.cam.attach(self, "FIRSTPERSON", "./Neck/Head")
		else:
			$Nametag.visible = true
			is_player = false
		world.get_node("HUD").update_characters()

func deselect_character():
	if is_network_master():
		world.player_char = null
		if world.client_id != 1: world.cam.attach(world, "STATIC", "./DEFAULTCAM")
		rpc("set_net_owner", 1)

func take_control_of_machine(slave_machine):
	machine = slave_machine
	controlling_machine = true

func lose_machine():
	if is_network_master(): world.cam.attach(self, "FIRSTPERSON", "./Neck/Head")
	controlling_machine = false
	machine = null

# Called every physics tick. 'delta' is constant
func _physics_process(delta: float) -> void:
	if is_network_master():
		if ladder_m != null:
			climb_ladder(delta)
		elif !on_floor_test() and in_water:
			swim(delta)
		else:
			walk(delta)
		is_on_floor = false #reset whether is on floor in between frames

# called each physics frame
func on_floor_test() -> bool:
	if $Feet.is_colliding():
		is_on_floor = true
		floor_normal = Vector3.UP
		floorspeed = $Feet.get_collider().get_linear_velocity() if $Feet.get_collider().has_method("get_linear_velocity") else Vector3.ZERO
		return true
	if player_state:
		for i in range(player_state.get_contact_count()):
			var contact_angle_from_up : float = Vector3.UP.angle_to(player_state.get_contact_local_normal(i))
			if contact_angle_from_up < FLOOR_MAX_ANGLE:
				floor_normal = player_state.get_contact_local_normal(i)
				is_on_floor = true
				return true
	return false

#modify simulated physics results
func _integrate_forces(state) -> void:
	player_state = state
	velocity = state.get_linear_velocity()
	$normal_vis.look_at($normal_vis.global_transform.origin + global_transform.basis.z, floor_normal)
	for i in range(player_state.get_contact_count()):
		var contact_angle_from_up : float = Vector3.UP.angle_to(player_state.get_contact_local_normal(i))
		if contact_angle_from_up > FLOOR_MAX_ANGLE and !is_on_floor:
			friction = 0
			break
		if i == player_state.get_contact_count() - 1:
			friction = 1
	if is_network_master():
		rpc("set_phys_transform", transform, linear_velocity)
		if global_transform.origin.y < -30:
			rpc("damage", 500000, "drown", [1, "Davy Jones"])

func walk(_delta:float) -> void:
	# Input
	direction = Vector3()
	var aim: Basis = head.get_global_transform().basis
	direction += -move_axis.x * aim.z + move_axis.y * aim.x
	direction.y = 0
	direction = direction.normalized()
	
	if floor_normal != Vector3.UP: direction = direction.rotated(floor_normal.cross(Vector3.UP).normalized(), Vector3.UP.angle_to(floor_normal))
	
	# Jump
	if is_player and jumping and is_on_floor and can_jump:
		jump()
	
	#max walk speed
	var _speed = walk_speed
	var _temp_accel: float = acceleration
	var _cspeed = sqrt(pow(velocity.x-floorspeed.x,2)+pow(velocity.z-floorspeed.z,2))
	
	if not is_on_floor:
		_temp_accel *= air_control

	var projVel = Vector2(velocity.x-floorspeed.x,velocity.z-floorspeed.z).dot(Vector2(direction.x,direction.z))
	
	if is_on_floor:
		add_central_force(-mass*_cspeed*linear_velocity.normalized()*c_friction)#friction
		if _speed - _cspeed > 0:
			add_central_force (mass*Vector3(direction.x*_temp_accel, 0, direction.z*_temp_accel))#velocity.x += direction.x*_temp_accel
		else:
			add_central_force(mass*Vector3(direction.x*(_speed-projVel), 0, direction.z*(_speed-projVel)))
	elif 1.0 - projVel > 0:
		add_central_force (mass*Vector3(direction.x*_temp_accel, 0, direction.z*_temp_accel))

func jump():
	can_jump = false
	apply_central_impulse(Vector3.UP*jump_height)
	yield(get_tree().create_timer(0.05),"timeout")
	can_jump = true

func swim(_delta):
	#drag and buoyancy
	add_central_force(Vector3.UP*weight*1.0)
	add_central_force(-1*linear_velocity*100)
	#controls
	var dir: Basis = head.get_global_transform().basis
	var m_dir: Vector3 = -move_axis.x * dir.z + move_axis.y * dir.x
	m_dir = m_dir.normalized()
	add_central_force(swim_speed*m_dir)
	if jumping:
		add_central_force(Vector3.UP*weight*0.5)
	
func enter_water():
	in_water = true

func exit_water():
	in_water = false

func mount_ladder(target_ladder):
	var ladder_tracker = Spatial.new()
	ladder_tracker.name = name
	target_ladder.add_child(ladder_tracker)
	ladder_tracker.transform = target_ladder.bottom.transform
	
	ladder_tracker.global_transform.origin = target_ladder.get_nearest_point_to_route(global_transform.origin)
	look_at(global_transform.origin + target_ladder.global_transform.basis.x, target_ladder.global_transform.basis.y)
	
	ladder_m = ladder_tracker
	global_transform.origin = ladder_m.global_transform.origin
	global_transform.basis = ladder_m.global_transform.basis.orthonormalized()
	linear_velocity = Vector3.ZERO
	set_gravity_scale(0.0)

#called each frame while climbing ladder
func climb_ladder(delta):
	var new_ladder_pos = ladder_m.global_transform.origin + ladder_m.global_transform.basis.y.normalized() * move_axis.x * delta * climb_speed
	var prog = ladder_m.get_parent().get_climb_scalar(new_ladder_pos)
	if prog >= 0.0 and prog <= 1.0:
		ladder_m.global_transform.origin = new_ladder_pos
	global_transform.origin = ladder_m.global_transform.origin
	global_transform.basis = ladder_m.global_transform.basis.orthonormalized()

func leave_ladder():
	if (ladder_m.get_parent().top.global_transform.origin - global_transform.origin).length_squared() < 0.01:
		apply_central_impulse(-400*ladder_m.global_transform.basis.z)
	global_transform.basis = world.global_transform.basis
	set_gravity_scale(1.0)
	ladder_m.queue_free()
	ladder_m = null

remotesync func damage(dmg_amt, _type, shooter, extra = ""):
	health -= dmg_amt
	if health <= 0 and is_network_master():
		if shooter[0] != get_network_master() and shooter[0] != 1: world.rpc_id(shooter[0], "game_killsound")
		if get_network_master() == 1:
			world._call_on_server("_character_death", {"killer_id" : shooter[0], "killer" : shooter[1], "victim_mp_id" : get_network_master(), "victim" : name, "extra" : extra})
		else:
			world.rpc_id(1, "_call_on_server", "_character_death", {"killer_id" : shooter[0], "killer" : shooter[1], "victim_mp_id" : get_network_master(), "victim" : name, "extra" : extra})
	elif is_network_master():
		if shooter[0] != get_network_master() and shooter[0] != 1: world.rpc_id(shooter[0], "game_hitsound")

remotesync func remove_dead_character():
	if is_network_master() and machine != null:
		machine.relinquish_control()
	deselect_character()
	queue_free()

remotesync func net_apply_impulse(impulse_v):
	apply_central_impulse(impulse_v)