extends SceneTree

# Headless gameplay test: run with
#   godot --headless -s res://tests/test_build_info_popup.gd
# Every build option explains itself before anything is spent. Picking a
# structure costs ore and, for a mothership, can destroy the one you already
# have, so no option may build straight off the menu press.
#
# Verifies, for EVERY option in the build menu:
#   1. pressing it opens the popup with that building's own title and a
#      non-empty description, and shows its price
#   2. nothing is built and no ore is spent until the confirm is pressed
#   3. confirming builds exactly that structure and charges exactly its cost
#   4. closing the popup instead drops the pending build entirely - a later
#      confirm press does nothing

var scene: Node
var game_state: Node
var controller: Node
var popup: Control
var title: Label
var message: Label
var cost_number: NeonNumber
var build_button: IconButton
var stage: int = 0
var elapsed: float = 0.0

# Extractor is excluded: it needs a planet underneath, which
# test_extractor_building covers in full.
const OPTIONS: Array = [
	{"type": "mothership", "title": "Mothership"},
	{"type": "ship_crafter", "title": "Ship Crafter"},
	{"type": "command_center", "title": "Command Center"},
]


func _initialize() -> void:
	game_state = root.get_node("GameState")
	game_state.rocks = 500
	game_state.buildings.clear()
	game_state.extractors.clear()
	# Structures are gated behind the mothership's research tree. That gate
	# is test_skill_tree's subject, not this one's - here every option needs
	# to be available so the popup itself can be exercised.
	game_state.reset_progression()
	for node in GameState.SKILL_TREE:
		game_state.unlocked.append(node.id)

	scene = load("res://Main.tscn").instantiate()
	root.add_child(scene)
	controller = scene.get_node("BuildController")
	popup = scene.get_node("UI/BuildMenu/InfoPopup")
	title = popup.get_node("Panel/TitleLabel")
	message = popup.get_node("Panel/MessageLabel")
	cost_number = popup.get_node("Panel/CostNumber")
	build_button = popup.get_node("Panel/BuildButton")


func _count(type: String) -> int:
	var n: int = 0
	for b in game_state.buildings:
		if b.type == type:
			n += 1
	return n


func _process(delta: float) -> bool:
	elapsed += delta
	match stage:
		0:
			scene.get_node("AsteroidField").set_process(false)
			scene.get_node("EnemySpawner").set_process(false)
			elapsed = 0.0
			stage = 1
			return false
		1:
			if elapsed < 0.2:
				return false

			for option in OPTIONS:
				var type: String = option.type
				var expected_cost: int = controller.cost_of(type)
				var rocks_before: int = game_state.rocks
				var built_before: int = _count(type)

				controller._on_build_pressed()
				controller._show_building_info(type)

				var informed: bool = popup.visible \
					and title.text == option.title \
					and message.text.length() > 40 \
					and cost_number.amount == expected_cost \
					and build_button.visible
				var untouched: bool = game_state.rocks == rocks_before and _count(type) == built_before
				print("%s: popup=%s title='%s' cost=%d offered=%s nothing_spent_yet=%s" % [
					type, popup.visible, title.text, cost_number.amount,
					build_button.visible, untouched
				])
				if not (informed and untouched):
					print("TEST_BUILD_INFO_POPUP: FAIL (%s did not explain itself before building)" % type)
					quit(1)
					return true

				# --- closing drops it, it must not build later ------------
				controller._close_info()
				controller._confirm_build()
				if _count(type) != built_before or game_state.rocks != rocks_before:
					print("TEST_BUILD_INFO_POPUP: FAIL (%s built after the popup was dismissed)" % type)
					quit(1)
					return true

				# --- reopening and confirming builds it ------------------
				controller._on_build_pressed()
				controller._show_building_info(type)
				controller._confirm_build()
				var built: bool = _count(type) == built_before + 1
				var charged: bool = game_state.rocks == rocks_before - expected_cost
				print("%s: confirmed -> built=%s rocks %d->%d charged=%s" % [
					type, built, rocks_before, game_state.rocks, charged
				])
				if not (built and charged):
					print("TEST_BUILD_INFO_POPUP: FAIL (%s did not build on confirmation)" % type)
					quit(1)
					return true

			print("TEST_BUILD_INFO_POPUP: PASS")
			quit(0)
			return true
	return false