extends SceneTree

# Headless gameplay test: run with
#   godot --headless -s res://tests/test_resource_readout.gd
# Verifies ResourceReadout.gd (#49) generalizes ResourceCounter/GasCounter/
# CargoCounter/GasCargoCounter into one row per GameState.resource_types()
# entry, in both Main.tscn and PlanetSurface.tscn, with no per-resource
# code:
#   1. exactly one banked + one fleet NeonNumber per current resource type,
#      each correctly reading its own resource's amount
#   2. fleet rows hide at zero and show once carried, banked rows always show
#   3. banked and fleet rows are visually distinct (colour, position)
#   4. the script itself contains no hardcoded resource id - the row count
#      and mapping come entirely from GameState.resource_types()
#   5. PlanetSurface.tscn's instance renders too, with its own bright-
#      background contrast
#
# A -s entry-point script can only reach the GameState autoload's CONSTANTS
# through the bare "GameState" identifier (GameState.RESOURCE_ORE etc.) -
# calling any of its METHODS that way fails to compile with "Identifier not
# found: GameState", even from _initialize(). Every other test in this suite
# already routes method calls through the actual instance
# (root.get_node("GameState")) instead, and this file follows the same rule.

var game_state: Node
var main: Node
var readout: Node
var stage: int = 0
var elapsed: float = 0.0


func _initialize() -> void:
	game_state = root.get_node("GameState")
	game_state.bank_inventory.set_amount(GameState.RESOURCE_ORE, 11)
	game_state.bank_inventory.set_amount(GameState.RESOURCE_GAS, 4)
	game_state.fleet_inventory.set_amount(GameState.RESOURCE_ORE, 6)
	# Gas left at 0 in the fleet hold deliberately, to check the hide-at-zero
	# rule holds per-resource, not just per-readout.

	# --- 4. no hardcoded resource id in the generalized script ---
	var source: String = FileAccess.get_file_as_string("res://ResourceReadout.gd")
	for literal in ['"ore"', '"gas"', 'RESOURCE_ORE', 'RESOURCE_GAS']:
		if literal in source:
			return _fail("ResourceReadout.gd hardcodes %s - it must read GameState.resource_types() only" % literal)

	main = load("res://Main.tscn").instantiate()
	root.add_child(main)
	readout = main.get_node("UI/ResourceReadout")


func _process(delta: float) -> bool:
	elapsed += delta
	match stage:
		0:
			if elapsed < 0.2:
				return false

			# --- 1. one row per resource type, correctly mapped ---
			var types: PackedStringArray = game_state.resource_types()
			for resource_type in types:
				var banked: Node = readout.banked_number(resource_type)
				var fleet: Node = readout.fleet_number(resource_type)
				if banked == null or fleet == null:
					return _fail("no readout row for resource '%s'" % resource_type)
				if banked.amount != game_state.banked_resource(resource_type):
					return _fail("banked row for '%s' shows %d, bank has %d" % [
						resource_type, banked.amount, game_state.banked_resource(resource_type)
					])

			# --- 2. hide-at-zero is per resource ---
			var ore_fleet: Node = readout.fleet_number(GameState.RESOURCE_ORE)
			var gas_fleet: Node = readout.fleet_number(GameState.RESOURCE_GAS)
			if not ore_fleet.visible:
				return _fail("fleet ore is 6 but its row is hidden")
			if gas_fleet.visible:
				return _fail("fleet gas is 0 but its row is showing")
			if ore_fleet.amount != 6:
				return _fail("fleet ore row shows %d, hold has 6" % ore_fleet.amount)

			# --- 3. banked and fleet are visually distinct ---
			var ore_banked: Node = readout.banked_number(GameState.RESOURCE_ORE)
			if ore_banked.glow_color == ore_fleet.glow_color:
				return _fail("banked and fleet rows share a colour")
			if ore_banked.position == ore_fleet.position:
				return _fail("banked and fleet rows share a position")

			# Depositing gas into the fleet hold should reveal its row live.
			game_state.fleet_inventory.deposit(GameState.RESOURCE_GAS, 3)
			elapsed = 0.0
			stage = 1
			return false
		1:
			if elapsed < 0.2:
				return false
			var gas_fleet: Node = readout.fleet_number(GameState.RESOURCE_GAS)
			if not gas_fleet.visible or gas_fleet.amount != 3:
				return _fail("fleet gas row did not update live after a deposit (visible=%s amount=%d)" % [
					gas_fleet.visible, gas_fleet.amount
				])

			# --- 5. the surface scene's instance also works, bright-background ---
			main.free()
			var surface: Node = load("res://PlanetSurface.tscn").instantiate()
			root.add_child(surface)
			var surface_readout: Node = surface.get_node("UI/ResourceReadout")
			if not surface_readout.bright_background:
				surface.free()
				return _fail("PlanetSurface's ResourceReadout instance is not set to bright_background")
			elapsed = 0.0
			stage = 2
			return false
		2:
			if elapsed < 0.2:
				return false
			print("TEST_RESOURCE_READOUT: PASS")
			quit(0)
			return true
	return false


func _fail(message: String) -> bool:
	print("TEST_RESOURCE_READOUT: FAIL (%s)" % message)
	quit(1)
	return true