extends Node2D

# Bootstraps the surviving fleet on this scene's own startup (from
# GameState, since this is a fresh scene tree - nothing here carries
# over automatically) and handles the always-available exit prompt that
# fades back out to Main.tscn, restoring the fleet at wherever it left
# space from.

@export var fade_duration: float = 0.4

@onready var fleet: Node2D = get_node("../Fleet")
@onready var camera: Camera2D = get_node("../Camera2D")
@onready var planet_name_label: Label = get_node("../UI/PlanetNameLabel")
@onready var exit_button: IconButton = get_node("../UI/ExitButton")
@onready var fade_rect: ColorRect = get_node("../FadeOverlay/FadeRect")

var transitioning: bool = false


func _ready() -> void:
	if GameState.planet_type == "gas_giant":
		# A gas giant is not lunar terrain: its surface view uses a deep,
		# coloured atmosphere instead of the rocky field.
		get_node("../RockField").visible = false
		get_node("../GasVentField").visible = true
		get_node("../BackgroundLayer/LunarBackground").color = Color(0.16, 0.035, 0.26, 1.0)
	fleet.spawn_ships(GameState.surviving_ship_count, Vector2.ZERO)
	camera.position = Vector2.ZERO
	camera.zoom = Vector2(GameState.return_camera_zoom, GameState.return_camera_zoom)
	planet_name_label.text = GameState.planet_name
	exit_button.pressed.connect(_on_exit_pressed)

	fade_rect.color.a = 1.0
	var tween: Tween = create_tween()
	tween.tween_property(fade_rect, "color:a", 0.0, fade_duration)


func _on_exit_pressed() -> void:
	if transitioning:
		return
	transitioning = true

	GameState.surviving_ship_count = fleet.ships.size()

	var tween: Tween = create_tween()
	tween.tween_property(fade_rect, "color:a", 1.0, fade_duration)
	tween.tween_callback(_return_to_space)


func _return_to_space() -> void:
	get_tree().change_scene_to_file("res://Main.tscn")