extends Node2D

const ARM_TIME := 0.7
const LIFETIME := 60.0
const TRIGGER_RADIUS := 54.0
const DAMAGE_FRACTION := 0.5
const MINE_TEXTURE := preload("res://assets/other/enemy_mine.png")
var player: CharacterBody2D
var drift := Vector2.ZERO
var _age := 0.0
var _triggered := false
var _sprite: Sprite2D

func _ready() -> void:
	add_to_group("enemy_mines")
	z_index = 12
	_sprite = Sprite2D.new()
	_sprite.name = "MineArtwork"
	_sprite.texture = MINE_TEXTURE
	_sprite.texture_filter = CanvasItem.TEXTURE_FILTER_LINEAR_WITH_MIPMAPS
	_sprite.scale = Vector2.ONE * 72.0 / maxf(MINE_TEXTURE.get_width(), MINE_TEXTURE.get_height())
	add_child(_sprite)

func _physics_process(delta: float) -> void:
	_age += delta
	position += drift * delta
	drift = drift.move_toward(Vector2.ZERO, 100.0 * delta)
	if is_instance_valid(_sprite):
		_sprite.rotation = _age * 0.16
		_sprite.modulate = Color.WHITE if _age >= ARM_TIME else Color(0.65, 0.65, 0.7)
		_sprite.modulate.a = clampf(LIFETIME - _age, 0.0, 1.0)
	queue_redraw()
	if _age >= LIFETIME:
		queue_free()
		return
	if _triggered or _age < ARM_TIME or not is_instance_valid(player) or bool(player.get("_is_destroyed")):
		return
	if global_position.distance_to(player.global_position) <= TRIGGER_RADIUS:
		_triggered = true
		player.call("take_damage", float(player.get("max_hull")) * DAMAGE_FRACTION, false, DamageTypes.Type.KINETIC)
		var explosion := Node2D.new()
		explosion.set_script(preload("res://scripts/game/deployment_flash.gd"))
		explosion.set("color", Color("ff4265"))
		explosion.set("blast", true)
		explosion.position = position
		get_parent().add_child(explosion)
		queue_free()

func _draw() -> void:
	var armed := _age >= ARM_TIME
	var pulse := 0.65 + 0.35 * sin(_age * 7.0)
	var accent := Color("ff4265") if armed else Color("ffb45c")
	var fade := clampf(LIFETIME - _age, 0.0, 1.0)
	# The artwork carries the hull; soft warning rings remain visible on dark space.
	draw_circle(Vector2.ZERO, 33.0, Color(accent, 0.07 * pulse * fade))
	draw_circle(Vector2.ZERO, 25.0, Color(accent, 0.1 * pulse * fade))
	var progress := clampf(_age / ARM_TIME, 0.0, 1.0)
	draw_arc(Vector2.ZERO, 31.0, -PI * 0.5, -PI * 0.5 + TAU * progress, 64, Color(accent, (0.22 + 0.28 * pulse) * fade), 1.0, true)