extends Node
const UI := preload("res://scripts/planets/expedition_ui.gd")
var game: Node2D
var player: CharacterBody2D
var freighter: Node2D
var screen: Control
var _layer: CanvasLayer
var _prompt: PanelContainer
var _text: Label
var _scan_button: Button
var _land_button: Button
var _near_planet: Node2D
var _message := ""
var _message_time := 0.0
var _previous_pause := false
var _previous_docked := false
var _hud_was_visible := true
var _prompt_refresh_time := 0.0

func _ready() -> void:
	process_mode = Node.PROCESS_MODE_ALWAYS
	name = "PlanetExpeditions"
	get_tree().auto_accept_quit = false
	freighter = Node2D.new()
	freighter.name = "Freighter"
	freighter.position = Vector2(480,-270)
	game.add_child(freighter)
	var sprite := Sprite2D.new()
	sprite.texture = preload("res://assets/planets/freighter.png")
	sprite.scale = Vector2.ONE * 190.0 / maxf(sprite.texture.get_width(),sprite.texture.get_height())
	freighter.add_child(sprite)
	var label := Label.new()
	label.text = "FRACHTOWIEC  [L]"
	label.position = Vector2(-95,75)
	label.add_theme_font_size_override("font_size",15)
	label.add_theme_color_override("font_color",UI.CYAN)
	freighter.add_child(label)
	_layer = CanvasLayer.new()
	_layer.layer = 60
	add_child(_layer)
	_prompt = UI.panel(_layer,Vector2(440,0))
	var column := VBoxContainer.new()
	_prompt.add_child(column)
	_text = UI.label(column,"",14)
	_text.custom_minimum_size.x = 420
	_text.autowrap_mode = TextServer.AUTOWRAP_WORD_SMART
	var row := HBoxContainer.new()
	column.add_child(row)
	_scan_button = UI.button(row,"SKANUJ  [F]",scan_nearby)
	_land_button = UI.button(row,"LĄDUJ  [L]",land_nearby)
	_prompt.hide()
	get_viewport().size_changed.connect(_layout_prompt)

func combat_blocked() -> bool:
	if float(player.get("landing_combat_lock")) > 0:
		return true
	for enemy in get_tree().get_nodes_in_group("enemies"):
		if enemy is Node2D and player.global_position.distance_to(enemy.global_position) < 650:
			return true
	return false

func _process(delta: float) -> void:
	_message_time = maxf(0, _message_time - delta)
	if is_instance_valid(screen) or get_tree().paused or bool(player.get("_is_destroyed")):
		_prompt.hide()
		return
	_prompt_refresh_time += delta
	# Proximity hints do not need to rebuild at the rendering frame rate.
	if delta > 0 and _prompt_refresh_time < 0.1:
		return
	_prompt_refresh_time = 0
	_refresh_prompt()

func _refresh_prompt() -> void:
	_near_planet = null
	var best := INF
	for planet in get_tree().get_nodes_in_group("scanner_planets"):
		if not bool(planet.get("earthlike")):
			continue
		var distance: float = player.global_position.distance_to(planet.global_position) - float(planet.get("radius"))
		if distance < 190 and distance < best:
			best = distance
			_near_planet = planet
	var nearby_freighter := player.global_position.distance_squared_to(freighter.global_position) < 230.0 * 230.0
	var has_destination := nearby_freighter or is_instance_valid(_near_planet)
	if not has_destination and _message_time <= 0:
		_prompt.hide()
		# Never accumulate combat text while the hint is hidden.
		if not _text.text.is_empty():
			_text.text = ""
		return
	var blocked := combat_blocked()
	if blocked:
		_prompt.hide()
		return
	var text := ""
	if _message_time > 0:
		text = _message
	elif nearby_freighter:
		text = "FRACHTOWIEC  ·  Hangar / Warsztat / Laboratorium"
	else:
		var profile: Dictionary = _near_planet.planet_profile
		if GameState.captain.expedition.scans.has(profile.id):
			text = preload("res://scripts/planets/planet_profiles.gd").scan_description(profile,GameState.captain)
		else:
			text = "%s  /  EARTHLIKE\nZeskanuj warunki przed lądowaniem." % profile.name
	if blocked and _message_time <= 0:
		text += "\nDokowanie i lądowanie zablokowane podczas walki."
	var changed := _text.text != text or _scan_button.visible != (is_instance_valid(_near_planet) and not nearby_freighter) or _land_button.visible != has_destination
	if _text.text != text:
		_text.text = text
	_scan_button.visible = is_instance_valid(_near_planet) and not nearby_freighter
	_land_button.visible = has_destination
	_land_button.text = "DOKUJ  [L]" if nearby_freighter else "LĄDUJ  [L]"
	_land_button.disabled = blocked
	_prompt.show()
	if changed:
		# A standalone PanelContainer otherwise keeps its previous large height.
		_layout_prompt.call_deferred()

func _layout_prompt() -> void:
	if not is_instance_valid(_prompt):
		return
	_prompt.size = Vector2(460, _prompt.get_combined_minimum_size().y)
	var viewport_size := get_viewport().get_visible_rect().size
	_prompt.position = Vector2((viewport_size.x - _prompt.size.x) * 0.5, maxf(16, viewport_size.y - _prompt.size.y - 160))


func _unhandled_key_input(event: InputEvent) -> void:
	if is_instance_valid(screen) or get_tree().paused or not event.pressed or event.echo:
		return
	if event.keycode == KEY_F:
		scan_nearby()
	elif event.keycode == KEY_L:
		land_nearby()
	else:
		return
	get_viewport().set_input_as_handled()

func scan_nearby() -> void:
	_refresh_prompt()
	if not is_instance_valid(_near_planet):
		return
	GameState.captain.expedition.scan(_near_planet.planet_profile)
	_message_time = 0
	_refresh_prompt()

func land_nearby() -> void:
	_refresh_prompt()
	if is_instance_valid(screen) or bool(player.get("_is_destroyed")):
		return
	if combat_blocked():
		_notice("Odsuń się od przeciwników i zakończ walkę.")
		return
	if player.global_position.distance_to(freighter.global_position) < 230:
		open_freighter()
		return
	if not is_instance_valid(_near_planet):
		return
	var progress: Resource = GameState.captain.expedition
	if not progress.scans.has(_near_planet.planet_profile.id):
		scan_nearby()
		return
	if not progress.begin_visit(_near_planet.planet_profile):
		_notice("Lądownik wymaga naprawy do 100% we frachtowcu.")
		return
	_enter()
	screen = Control.new()
	screen.set_script(preload("res://scripts/planets/surface_screen.gd"))
	screen.captain = GameState.captain
	screen.progress = progress
	screen.flight_ship = player
	screen.finished.connect(finish_surface)
	_layer.add_child(screen)

func open_freighter() -> void:
	_enter()
	screen = Control.new()
	screen.set_script(preload("res://scripts/planets/freighter_screen.gd"))
	screen.captain = GameState.captain
	screen.inventory = player.get_node("ShipInventory")
	screen.closed.connect(_leave)
	_layer.add_child(screen)

func _enter() -> void:
	_previous_pause = get_tree().paused
	_previous_docked = player.is_docked
	_hud_was_visible = game.get_node("HUD/HUDRoot").visible
	game.get_node("HUD/HUDRoot").hide()
	player.is_docked = true
	player.velocity = Vector2.ZERO
	get_tree().paused = true
	_prompt.hide()

func finish_surface(success: bool) -> void:
	var progress: Resource = GameState.captain.expedition
	var result: Dictionary = progress.finish_visit(GameState.captain,success)
	progress.deliver_modules(player.get_node("ShipInventory"))
	_leave()
	var cargo_text := UI.material_text(result.get("materials",{}))
	_notice(("POWRÓT Z WYPRAWY · " + (cargo_text if not cargo_text.is_empty() else "brak łupu")) if result.get("success",false) else "LĄDOWNIK ZNISZCZONY · Utracono łup bieżącej wyprawy.")
	if not progress.delivered_modules.is_empty():
		_message += "\nBrak miejsca: %d modułów czeka we frachtowcu." % progress.delivered_modules.size()

func _leave() -> void:
	if is_instance_valid(screen):
		_layer.remove_child(screen)
		screen.queue_free()
	screen = null
	player.is_docked = _previous_docked
	game.get_node("HUD/HUDRoot").visible = _hud_was_visible
	get_tree().paused = _previous_pause

func _notice(message: String) -> void:
	_message = message
	_message_time = 7
	_prompt_refresh_time = 0.1

func _notification(what: int) -> void:
	if what == NOTIFICATION_WM_CLOSE_REQUEST:
		if GameState.captain.expedition.active:
			GameState.captain.expedition.finish_visit(GameState.captain,true)
		get_tree().quit()

func _exit_tree() -> void:
	if is_instance_valid(GameState.captain) and GameState.captain.expedition.active:
		GameState.captain.expedition.finish_visit(GameState.captain,true)
	if is_instance_valid(screen):
		get_tree().paused = _previous_pause
	get_tree().auto_accept_quit = true