extends SceneTree

# Headless test: run with
#   godot --headless -s res://tests/test_desktop_controls.gd
# Forgejo #118 and #121: two raw-touch controls that a mouse could not
# reach.
#
# Both read InputEventScreenTouch/ScreenDrag, and the project no longer turns
# clicks into them - the same routing gap #93 found in the research tree.
# The boost was unreachable on a desktop and the formation could not be
# rearranged at all.
#
# Driven through the REAL routing in each case - the viewport itself for the
# fader, BuildController for the editor - rather than by calling the
# controls directly, because the routing is what was missing: a test that
# called handle_mouse_button() itself would have passed against both
# reports. It did, in fact, and hid a second one: the fader was dispatched
# from Main, which is the LAST node to see an unhandled press, so
# MouseCombatController fired the guns with it and the knob never moved.
#
# Covers:
#   A. #118 - a click on the fader takes hold of it, dragging moves the
#      boost, and releasing lets go
#   B. the press stops at the fader: not the camera behind it, and not the
#      guns, which claim every other left press on a desktop
#   C. #121 - a click grabs a formation slot, moving drags it, and the
#      formation really changes
#   D. releasing drops the slot, and moving afterwards does not keep dragging
#   E. the wheel zooms the formation panel, which is what replaces the pinch

var game_state: Node
var scene: Node
var controller: Node
var fleet: Node
var fader: Control
var editor: Control
var formation_menu: Control
var stage: int = 0
var elapsed: float = 0.0


func _initialize() -> void:
	# GameState is an autoload: a bare GameState.<instance member> does not
	# compile in a SceneTree script, so the node is fetched by name instead.
	game_state = root.get_node("GameState")
	game_state.buildings.clear()
	game_state.extractors.clear()
	game_state.reset_progression()
	game_state.reset_waves()
	game_state.reset_formation()
	game_state.intro_active = false
	game_state.vessel_levels["unlock_distorder"] = 1
	# #219: fleet capacity is built now - one berth free, one per Fleet
	# Office. This test flies more than one vessel, so it needs the offices
	# standing before the fleet spawns into them.
	load("res://tests/_berths.gd").grant(root.get_node("GameState"), 6)
	scene = load("res://world/Main.tscn").instantiate()
	root.add_child(scene)
	current_scene = scene
	fleet = scene.get_node("Fleet")
	controller = scene.get_node("BuildController")
	fader = scene.get_node("UI/SpeedFader")
	editor = scene.get_node("UI/FormationMenu/Editor")
	formation_menu = scene.get_node("UI/FormationMenu")


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


# Pushed through the viewport, not handed to a node's own _unhandled_input:
# WHICH node sees a press first is the thing under test. #118 shipped a fader
# that only worked when a test called it directly - MouseCombatController
# claims every left press to fire the guns, and it is dispatched well before
# Main's own handler, so on a real desktop the click never arrived.
# `true` keeps the coordinates in viewport space, which is the space the
# controls are laid out in.
func _push(event: InputEvent) -> void:
	root.push_input(event, true)


func _push_click(at: Vector2, pressed: bool) -> void:
	var event: InputEventMouseButton = InputEventMouseButton.new()
	event.button_index = MOUSE_BUTTON_LEFT
	event.pressed = pressed
	event.position = at
	_push(event)


func _push_move(to: Vector2) -> void:
	var event: InputEventMouseMotion = InputEventMouseMotion.new()
	event.position = to
	_push(event)


func _click(at: Vector2, pressed: bool, target: Node) -> void:
	var event: InputEventMouseButton = InputEventMouseButton.new()
	event.button_index = MOUSE_BUTTON_LEFT
	event.pressed = pressed
	event.position = at
	target._unhandled_input(event)


func _move(to: Vector2, target: Node) -> void:
	var event: InputEventMouseMotion = InputEventMouseMotion.new()
	event.position = to
	target._unhandled_input(event)


func _wheel(button: int, at: Vector2) -> void:
	var event: InputEventMouseButton = InputEventMouseButton.new()
	event.button_index = button
	event.pressed = true
	event.position = at
	controller._unhandled_input(event)


func _process(delta: float) -> bool:
	elapsed += delta
	match stage:
		0:
			if elapsed < 0.3:
				return false
			scene.get_node("AsteroidField").set_process(false)
			scene.get_node("EnemySpawner").set_process(false)
			# The fader only exists where the fleet can actually boost.
			fleet.spawn_ships(2, Vector2.ZERO, PackedStringArray([
				GameState.VESSEL_INTERCEPTOR, GameState.VESSEL_DISTORDER]))
			elapsed = 0.0
			stage = 1
			return false
		1:
			if elapsed < 0.3:
				return false
			if not fader.visible:
				return _fail("the fleet has an Energy Propulser and the fader is still hidden")
			if game_state.max_fleet_speed_multiplier <= 1.0:
				return _fail("the boost has no range to move through")

			# --- A. click, drag, release -----------------------------
			# With mouse aiming live, which is what a desktop always has:
			# the guns are the other thing a left press means, and they used
			# to take every one of them.
			var mouse_combat: Node = scene.get_node("MouseCombatController")
			mouse_combat.pointer_mode = mouse_combat.PointerMode.ON
			var top: Vector2 = fader.global_position + Vector2(fader.size.x * 0.5,
				fader.track_margin + 2.0)
			var bottom: Vector2 = fader.global_position + Vector2(fader.size.x * 0.5,
				fader.size.y - fader.track_margin - 2.0)
			_push_click(bottom, true)
			if not fader.is_active():
				return _fail("a click on the fader did not take hold of it")
			if mouse_combat.firing:
				return _fail("the click that grabbed the fader also fired the fleet's guns")
			var at_bottom: float = game_state.fleet_speed_multiplier
			_push_move(top)
			var at_top: float = game_state.fleet_speed_multiplier
			if at_top <= at_bottom:
				return _fail("dragging the fader from bottom to top left the boost at %.2f" % at_top)
			_push_click(top, false)
			if fader.is_active():
				return _fail("the fader is still held after the button came up")
			_push_move(bottom)
			if not is_equal_approx(game_state.fleet_speed_multiplier, at_top):
				return _fail("the fader kept following the pointer after release")
			print("fader: %.2fx at the bottom, %.2fx at the top, released cleanly" \
				% [at_bottom, at_top])

			# --- B. it claims the press ------------------------------
			var zoom_before: float = scene.get_node("Camera2D").zoom.x
			_push_click(bottom, true)
			_push_click(bottom, false)
			if not is_equal_approx(scene.get_node("Camera2D").zoom.x, zoom_before):
				return _fail("pressing the fader also moved the camera behind it")
			if mouse_combat.firing:
				return _fail("the fader's press reached the guns behind it")
			mouse_combat.pointer_mode = mouse_combat.PointerMode.AUTO
			print("the press stops at the fader; the world behind it is untouched")

			# --- C/D/E. the formation editor -------------------------
			formation_menu.visible = true
			editor.queue_redraw()
			elapsed = 0.0
			stage = 2
			return false
		2:
			if elapsed < 0.2:
				return false
			var slot_before: Vector2 = game_state.formation[0]
			var grab: Vector2 = editor.global_position + editor._slot_screen_pos(0)
			_click(grab, true, controller)
			if editor.dragging_index != 0:
				return _fail("a click on the first formation slot grabbed %d" % editor.dragging_index)
			_move(grab + Vector2(70.0, 40.0), controller)
			if game_state.formation[0] == slot_before:
				return _fail("dragging the slot did not move it")
			var dragged: Vector2 = game_state.formation[0]
			print("slot 0 moved from %s to %s under a mouse" % [str(slot_before), str(dragged)])

			# --- D. release lets go ----------------------------------
			_click(grab + Vector2(70.0, 40.0), false, controller)
			if editor.dragging_index != -1:
				return _fail("the slot is still held after the button came up")
			_move(grab + Vector2(200.0, 200.0), controller)
			if game_state.formation[0] != dragged:
				return _fail("the slot kept following the pointer after release")
			print("released, and the slot stopped following")

			# --- E. the wheel zooms ----------------------------------
			var scale_before: float = editor.scale_factor
			_wheel(MOUSE_BUTTON_WHEEL_UP, editor.global_position + editor.size * 0.5)
			if editor.scale_factor <= scale_before:
				return _fail("the wheel did not zoom the formation panel in")
			_wheel(MOUSE_BUTTON_WHEEL_DOWN, editor.global_position + editor.size * 0.5)
			_wheel(MOUSE_BUTTON_WHEEL_DOWN, editor.global_position + editor.size * 0.5)
			if editor.scale_factor >= scale_before:
				return _fail("the wheel did not zoom back out")
			print("the wheel zooms the panel both ways (%.2f -> %.2f)" \
				% [scale_before, editor.scale_factor])

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