extends Area2D


signal damage_taken
# signal shield_damage
# signal shield_ui

@export var speed: int = 150
@export var cooldown: float = 0.25
@export var bullet_scene : PackedScene
@export var max_shield: int = 10
var shield: int = 0:
    set = set_shield

var can_shoot = true
var shader_active = false
var clamp_shield = clamp(shield, 0, max_shield)

@onready var screensize = get_viewport_rect().size
@onready var explosion = $Explosion
@onready var wait_time = $GunCooldown
@onready var ship = $Ship

func _ready():
    print(shield)
    $Ship.hide()
    # start()

func start():
    print(shield)
    set_process(true)
    $Ship.show()
    position = Vector2(screensize.x / 2, screensize.y + 32)
    var tween = create_tween()
    tween.tween_property($Ship, "position:y",  32 * -1, .25)
    $GunCooldown.wait_time = cooldown
    set_shield(max_shield)
    print(shield)
    # EventBus.shield_changed.emit(max_shield, old_value, shield)

func _process(delta):
    var input = Input.get_vector("left", "right", "up", "down")
    if input.x > 0:
        $Ship.frame = 2
        $Ship/Boosters.animation = "right"
    elif input.x < 0:
        $Ship.frame = 0
        $Ship/Boosters.animation = "left"
    else:
        $Ship.frame = 1
        $Ship/Boosters.animation = "forward"
    position += input * speed * delta
    position = position.clamp(Vector2(8, 8), screensize - Vector2(8, 8))
    if Input.is_action_pressed("shoot"):
        shoot()

func shoot():
    if not can_shoot:
      return
    can_shoot = false
    $GunCooldown.start()
    var b = bullet_scene.instantiate()
    get_tree().root.add_child(b)
    b.start(position + $Ship.position + Vector2(0, -1))
    var tween = create_tween().set_parallel(false)
    tween.tween_property($Ship, "position:y", 1, 0.1).as_relative()
    tween.tween_property($Ship, "position:y", 0, 0.05).as_relative()

func set_shield(value: int):
    var old_value = shield
    shield = clamp(value, 0, max_shield)
    EventBus.shield_changed.emit(max_shield, old_value, shield)
    print("Shield set to:", shield)
    if shield <= 0:
      EventBus.player_died.emit()
      set_process(false)
      $Ship.hide()
      $Explosion.show()
      $Explosion/AnimationPlayer.play("explosion-one-shot")
      await $Explosion/AnimationPlayer.animation_finished

func _on_gun_cooldown_timeout() -> void:
            can_shoot = true

func _on_area_entered(area):
    if area.is_in_group("enemies"):
        area.explode()
        shield -= int(max_shield / 2)
        damage_taken.emit()
    if area.is_in_group("enemy_bullets"):
        damage_taken.emit()


func _on_damage_taken() -> void:
  # emit_signal("shield_ui")
  shader_active = true
  $Ship.material.set_shader_parameter("toggle", 1.0)
  await get_tree().create_timer(1).timeout
  shader_active = false
  $Ship.material.set_shader_parameter("toggle", 0.0)