extends Panel

@onready var tech_container = $Technologies



# Ścieżka do tekstur technologii (tu możesz dać swoje grafiki)
const DEFAULT_ICON = preload("res://assets/tech/Mining_Drill.png")

var dragging := false
var drag_offset := Vector2.ZERO
signal building_buttons_update

func _gui_input(event):
	if event is InputEventMouseButton:
		if event.button_index == MOUSE_BUTTON_LEFT:
			if event.pressed:
				# Kliknięto na panel → zaczynamy drag
				dragging = true
				drag_offset = get_local_mouse_position()
			else:
				# Zwolniono przycisk → kończymy drag
				dragging = false
	elif event is InputEventMouseMotion and dragging:
		# Przesuwamy panel względem pozycji myszy
		position += event.relative

func _ready():
	_create_technology_buttons()


func _create_technology_buttons():
	# Wyczyść stare przyciski
	for c in tech_container.get_children():
		c.queue_free()
	
	for tech_id in Technologies.TECHNOLOGIES.keys():
		var tech = Technologies.TECHNOLOGIES[tech_id]
		var btn = TextureButton.new()

		# 🔹 Ustaw ikonę technologii z pola "texture"
		if tech.has("texture") and tech.texture != "":
			btn.texture_normal = load(tech.texture)
		else:
			# Fallback na domyślną ikonę, jeśli brak tekstury w danych
			btn.texture_normal = DEFAULT_ICON

		btn.custom_minimum_size = Vector2(96, 96)
		
		btn.stretch_mode = TextureButton.STRETCH_KEEP_ASPECT_CENTERED

		# 🔹 Tooltip z opisem i kosztami
		var cost_text = ""
		for cost_name in tech.cost.keys():
			cost_text += "%s: %d " % [tr(cost_name), tech.cost[cost_name]]

		btn.tooltip_text = "%s\n%s\n%s %s" % [
			tr(tech.name),
			tr(tech.description),
			tr("Koszt:"),
			cost_text.strip_edges()
		]

		# 🔹 Jeśli gracz już ma tę technologię
		if tech_id in PlayerData.unlocked_techs:
			btn.modulate = Color(0.6, 0.6, 0.6)  # wyszarz
			btn.disabled = true
			btn.tooltip_text += "\n[✓] " + tr("Odkryta")
		
		# 🔹 Jeśli brakuje wymaganych technologii
		elif not _check_requirements(tech.requires):
			btn.modulate = Color(0.5, 0.5, 0.5)
			btn.disabled = true
			btn.tooltip_text += "\n[!] " + tr("Wymagania niespełnione")
		
		else:
			# 🔹 Po kliknięciu rozpocznij badanie technologii
			btn.connect("pressed", Callable(self, "_on_technology_pressed").bind(tech_id))
		
		tech_container.add_child(btn)



func _check_requirements(requirements: Array) -> bool:
	if requirements.is_empty():
		return true
	for req in requirements:
		if req not in PlayerData.unlocked_techs:
			return false
	return true


func _on_technology_pressed(tech_id):
	var tech = Technologies.TECHNOLOGIES[tech_id]

	# Jeśli gracz już ma tę technologię — nic nie rób
	if tech_id in PlayerData.unlocked_techs:
		print("Gracz już ma technologię:", tech_id)
		return

	# Sprawdź wymagania
	for req in tech.requires:
		if req not in PlayerData.unlocked_techs:
			print("Brak wymaganej technologii:", req)
			return

	# Sprawdź, czy gracz ma wystarczające zasoby i naukę
	for cost_name in tech.cost.keys():
		var required_amount = tech.cost[cost_name]
		var has_enough = false

		if cost_name == "science":
			has_enough = PlayerData.since_doc >= required_amount
		else:
			if PlayerData.resources.has(cost_name):
				has_enough = PlayerData.resources[cost_name] >= required_amount

		if not has_enough:
			print("Brak zasobu:", cost_name)
			return

	# Odejmij koszty
	for cost_name in tech.cost.keys():
		if cost_name == "science":
			PlayerData.since_doc -= tech.cost[cost_name]
		else:
			PlayerData.resources[cost_name] -= tech.cost[cost_name]

	# Dodaj technologię do odblokowanych
	PlayerData.unlocked_techs.append(tech_id)
	print("Odblokowano technologię:", tech.name)
	emit_signal("building_buttons_update")


	# Opcjonalnie: powiadom o zmianach
	PlayerData.emit_signal("stats_changed")

	_create_technology_buttons()


func _on_button_pressed() -> void:
	hide()