@icon("res://assets/icons/player.svg")
class_name Player
extends CharacterBody2D

## signals
signal turn_finished

## export variables
@export var attributes: PlayerAttributes ## The attributes resource that defines the player's abilities, vitals etc.

## regular variables
var is_active: bool = false: set = set_active
var player_label_offset: Vector2

## 'onready' variables
## child nodes
@onready var player_camera: Camera2D = $PlayerCamera
@onready var player_label: PlayerLabel = $PlayerLabel
@onready var player_nav: NavigationAgent2D = $PlayerNav
@onready var player_reach_area: Area2D = $PlayerReachArea
@onready var nav_target_sprite: Sprite2D = $NavTargetSprite
@onready var player_sprite: Sprite2D = $PlayerSprite
@onready var player_ui: CanvasLayer = $PlayerUI
#@onready var end_turn_button: Button = %EndTurnButton

## Overrides
func _ready() -> void:
	_connect_signals()
	#set_player_attributes(attributes)
	
	if attributes:
		_set_player_label_values(attributes)
		_set_player_sprite(attributes.player_texture)

	player_label_offset = player_label.position

func _process(_delta: float) -> void:
	_set_player_label_position()
	if is_active:
		_set_nav_sprite_position()

func _physics_process(_delta: float) -> void:
	_set_desired_velocity()
	if get_last_slide_collision():
		var collision = get_last_slide_collision()
		var collider = collision.get_collider()
		if collider is Ball:
			collider.apply_central_impulse(collision.get_normal() * -2.0)

func _input(event: InputEvent) -> void:
	if event.is_action_pressed("end_turn"):
		end_turn()
	if event is InputEventMouseButton and event.is_pressed() and event.button_index == 1:
		var click_position_global = get_global_mouse_position()
		print_debug("%s wants to navigate to %s" % [attributes.player_name, click_position_global])
		player_nav.target_position = click_position_global
		var target_distance = player_nav.distance_to_target()
		print_debug("That's %s pixels/cm away" % target_distance)

## Setters
func set_active(active: bool) -> void:
	is_active = active
	if is_active:
		print_debug("%s says: 'My turn!'" % attributes.player_name)
		player_camera.enabled = true
		player_camera.make_current()
		nav_target_sprite.visible = true
		set_process_input(true)
	else:
		print_debug("%s says: 'It's not my turn'" % attributes.player_name)
		player_camera.enabled = false
		nav_target_sprite.visible = false
		set_process_input(false)

## Actions
func end_turn() -> void:
	print_debug("%s says: I'd like my turn to end." % attributes.player_name)
	is_active = false
	turn_finished.emit()
	
## Helper functions
func _connect_signals() -> void:
	player_nav.connect("velocity_computed", on_velocity_computed)
	player_reach_area.connect("body_entered", on_player_reach_area_body_entered)
	player_reach_area.connect("body_exited", on_player_reach_area_body_exited)

func _set_desired_velocity() -> void:
	var desired_velocity: Vector2 = global_position.direction_to(player_nav.get_next_path_position()) * attributes.speed
	player_nav.velocity = desired_velocity

func _set_player_label_position() -> void:
	player_label.global_position = global_position + player_label_offset

func _set_nav_sprite_position() -> void:
	nav_target_sprite.global_position = get_global_mouse_position()

func _set_player_label_values(attributes_resource: PlayerAttributes) -> void:
	player_label.player_name = attributes_resource.player_name
	player_label.player_number = attributes_resource.player_number
	player_label.player_position = attributes_resource.player_position

func _set_player_sprite(texture: Texture2D) -> void:
	player_sprite.texture = texture

## Signal handlers
func on_player_reach_area_body_entered(body: PhysicsBody2D) -> void:
	if body is Player:
		print_debug((body.attributes.player_name) + " has entered %s's reach area" % attributes.player_name)
	elif body is Ball:
		print_debug("The ball has entered %s's reach area" % attributes.player_name)

func on_player_reach_area_body_exited(body: PhysicsBody2D) -> void:
	if body is Player:
		print_debug((body.attributes.player_name) + " has exited %s's reach area" % attributes.player_name)
	elif body is Ball:
		print_debug("The ball has exited %s's reach area" % attributes.player_name)

func on_velocity_computed(safe_velocity: Vector2) -> void:
	look_at(player_nav.get_next_path_position())
	velocity = safe_velocity
	move_and_slide()