class_name Player
extends CharacterBody3D

const MOVE_SPEED := 5.

static var instance: Player

@export var shake_noise: FastNoiseLite
var shake_duration := 0.
@onready var camera_transform: Transform3D = %Camera3D.transform

var damage_clock := 0.
var aim_angle: float
var health := 3:
	set(v):
		health = v
		if is_node_ready():
			%HealthLabel.text = "Health: %d" % v

func _init() -> void:
	instance = self

func _ready() -> void:
	health = health 

func _process_movement() -> void:
	var input = Input.get_vector("move_left", "move_right", "move_up", "move_down")
	input.normalized()
	velocity = Vector3(input.x, 0., input.y) * MOVE_SPEED
	move_and_slide()

func _process_aim() -> void:
	var viewport_mouse_pos := get_viewport().get_mouse_position()
	var r_origin: Vector3 = %Camera3D.project_ray_origin(viewport_mouse_pos)
	var r_dir: Vector3 = %Camera3D.project_ray_normal(viewport_mouse_pos)

	# y = mx + b
	# 0 = mx + b
	# -b / m = x

	var t := -r_origin.y / r_dir.y
	var world_mouse_pos = r_origin + r_dir * t
	var to_mouse_pos = world_mouse_pos - global_position

	var angle = Vector2(to_mouse_pos.x, -to_mouse_pos.z).angle()
	%Cannon.rotation.y = angle
	aim_angle = angle

	%Reticle.position = to_mouse_pos

func _process_shoot() -> void:
	if Input.is_action_just_pressed("fire"):
		var dir := Vector3.RIGHT.rotated(Vector3.UP, aim_angle)
		var player_projectile: PlayerProjectile = preload("player_projectile.tscn").instantiate()
		player_projectile.init(dir)
		player_projectile.global_position = global_position + Vector3.UP * 0.5
		add_sibling(player_projectile)

func _process_cam_shake(delta: float) -> void:
	shake_duration -= delta
	%Camera3D.transform = camera_transform
	if shake_duration <= 0:
		return
	
	var x := shake_noise.get_noise_1d(shake_duration * 10000)
	var y := shake_noise.get_noise_1d(-shake_duration * 10000)
	var v := \
			camera_transform.basis.x * x + \
			camera_transform.basis.y * y
	
	print("v = ", v)
	%Camera3D.position += v * .5

func _process(delta: float) -> void:
	_process_movement()
	_process_aim()
	_process_shoot()
	_process_cam_shake(delta)

	damage_clock -= delta

func damage() -> void:
	if damage_clock <= 0.:
		health -= 1
		damage_clock = 3
		shake_duration = .25

		if health == 0:
			get_tree().reload_current_scene()