extends SceneTree
## Smoke test verifying moving platform physics, triggers, timestamp sync, and player ride stability (Task 1f241f3406c3).

var _failures: int = 0
var _checks: int = 0

const ObjectMotionComponentClass = preload("res://scripts/components/object_motion_component.gd")
const StaticObjectNodeClass = preload("res://scripts/static_object_node.gd")
const WorldObjectClass = preload("res://scripts/world_object.gd")

func _init() -> void:
	print("--- Running Smoke Test: Moving Platform Physics & Motion Subsystem ---")
	test_procedural_motion_math()
	test_trigger_subsystem()
	test_timestamp_synchronization()
	test_platform_velocity_and_player_ride()

	if _failures == 0:
		print("--- PASS: All %d moving platform checks passed! ---" % _checks)
		quit(0)
	else:
		printerr("--- FAIL: %d failures out of %d checks ---" % [_failures, _checks])
		quit(1)


func _check(desc: String, cond: bool) -> void:
	_checks += 1
	if cond:
		print("  ✓ %s" % desc)
	else:
		_failures += 1
		printerr("  ✗ FAIL: %s" % desc)


func test_procedural_motion_math() -> void:
	print("Testing procedural motion (Rotate, Bob, Waypoints)...")
	var target := Node3D.new()
	target.position = Vector3(10, 0, 10)
	root.add_child(target)

	var motion := ObjectMotionComponentClass.new()
	target.add_child(motion)

	# 1. Rotate
	motion.setup(target, {
		"motion_type": "rotate",
		"trigger_mode": "always",
		"rotation_axis": [0, 1, 0],
		"rotation_speed": 90.0  # 90 deg / sec
	})
	motion._physics_process(1.0)
	_check("Target rotated 90 degrees around Y axis", is_equal_approx(target.rotation_degrees.y, 90.0))
	_check("Angular velocity set to Y axis rad speed", is_equal_approx(motion.angular_velocity.y, deg_to_rad(90.0)))

	# 2. Bob / Oscillate
	target.rotation = Vector3.ZERO
	target.position = Vector3(0, 5, 0)
	motion.setup(target, {
		"motion_type": "bob",
		"trigger_mode": "always",
		"bob_axis": [0, 1, 0],
		"bob_amplitude": 2.0,
		"bob_frequency": 0.25 # 4s period, at t=1.0s sin(pi/2) = 1.0 -> offset = +2.0
	})
	motion._physics_process(1.0)
	_check("Target bobbed up to Y=7.0 (amplitude 2.0 at peak)", is_equal_approx(target.position.y, 7.0))
	_check("Linear velocity reflects bob movement", motion.linear_velocity.y > 0.0)

	# 3. Waypoint path
	target.position = Vector3(0, 0, 0)
	motion.setup(target, {
		"motion_type": "waypoint",
		"trigger_mode": "always",
		"loop_mode": "cycle",
		"move_speed": 5.0,
		"waypoints": [[0, 0, 0], [10, 0, 0], [10, 0, 10], [0, 0, 10]]
	})
	# Move 1 second at 5.0 units/sec towards (10, 0, 0)
	motion._physics_process(1.0)
	_check("Waypoint moved target to (5, 0, 0)", target.position.is_equal_approx(Vector3(5, 0, 0)))
	_check("Linear velocity is (5, 0, 0)", motion.linear_velocity.is_equal_approx(Vector3(5, 0, 0)))

	# Another second reaches waypoint 1 (10, 0, 0)
	motion._physics_process(1.0)
	_check("Waypoint reached first target (10, 0, 0)", target.position.is_equal_approx(Vector3(10, 0, 0)))

	target.queue_free()


func test_trigger_subsystem() -> void:
	print("Testing motion triggers (Proximity, Interact, Signal)...")
	var target := Node3D.new()
	root.add_child(target)
	var motion := ObjectMotionComponentClass.new()
	target.add_child(motion)

	# 1. Proximity trigger
	motion.setup(target, {
		"motion_type": "bob",
		"trigger_mode": "proximity",
		"trigger_radius": 5.0
	})
	_check("Proximity trigger starts inactive", not motion.is_active)

	# Player outside radius
	var player_far := Vector3(20, 0, 0)
	_check("Player at dist 20 does not trigger", not motion.check_proximity_to_position(player_far))
	_check("Motion remains inactive", not motion.is_active)

	# Player inside radius
	var player_near := Vector3(3, 0, 0)
	_check("Player at dist 3 triggers proximity", motion.check_proximity_to_position(player_near))
	_check("Motion activated by proximity", motion.is_active)

	# Player leaves radius
	_check("Player leaving stops proximity", not motion.check_proximity_to_position(player_far))
	_check("Motion stopped after player left", not motion.is_active)

	# 2. Interact trigger
	motion.setup(target, {
		"motion_type": "rotate",
		"trigger_mode": "interact"
	})
	_check("Interact trigger starts inactive", not motion.is_active)
	motion.on_interact()
	_check("Interact click activated motion", motion.is_active)
	motion.on_interact()
	_check("Second interact click toggled motion off", not motion.is_active)

	# 3. Signal trigger
	motion.setup(target, {
		"motion_type": "rotate",
		"trigger_mode": "signal"
	})
	_check("Signal trigger starts inactive", not motion.is_active)
	motion.on_signal("activate_switch")
	_check("Signal activated motion", motion.is_active)

	target.queue_free()


func test_timestamp_synchronization() -> void:
	print("Testing deterministic networked timestamp synchronization...")
	var target1 := Node3D.new()
	var target2 := Node3D.new()
	root.add_child(target1)
	root.add_child(target2)

	var motion1 := ObjectMotionComponentClass.new()
	var motion2 := ObjectMotionComponentClass.new()
	target1.add_child(motion1)
	target2.add_child(motion2)

	var config := {
		"motion_type": "bob",
		"trigger_mode": "always",
		"bob_amplitude": 3.0,
		"bob_frequency": 0.5
	}
	motion1.setup(target1, config)
	motion2.setup(target2, config)

	# Simulate 2 clients receiving server time sync at t = 13.75s
	motion1.sync_to_timestamp(13.75)
	motion2.sync_to_timestamp(13.75)

	_check("Client 1 and Client 2 positions are identical at synced timestamp",
		target1.position.is_equal_approx(target2.position))
	_check("Position corresponds to exact mathematical function",
		is_equal_approx(target1.position.y, sin(13.75 * 0.5 * TAU) * 3.0))

	# Test waypoint timestamp sync
	var wp_config := {
		"motion_type": "waypoint",
		"trigger_mode": "always",
		"move_speed": 4.0,
		"waypoints": [[0, 0, 0], [20, 0, 0]]
	}
	target1.position = Vector3.ZERO
	target2.position = Vector3.ZERO
	motion1.setup(target1, wp_config)
	motion2.setup(target2, wp_config)

	# At t = 2.5s and speed = 4.0, distance travelled = 10.0 (halfway to (20, 0, 0))
	motion1.sync_to_timestamp(2.5)
	motion2.sync_to_timestamp(2.5)
	_check("Waypoints synced to exact path coordinate (10, 0, 0)",
		target1.position.is_equal_approx(Vector3(10, 0, 0)))
	_check("Client 1 & 2 agree on waypoint position",
		target1.position.is_equal_approx(target2.position))

	target1.queue_free()
	target2.queue_free()


func test_platform_velocity_and_player_ride() -> void:
	print("Testing moving platform velocity assignment and CharacterBody3D ride physics...")
	# Create a moving platform node with collision
	var platform := Node3D.new()
	platform.name = "Platform"
	root.add_child(platform)

	var sb := StaticBody3D.new()
	sb.name = "collision"
	var cshape := CollisionShape3D.new()
	var box := BoxShape3D.new()
	box.size = Vector3(4.0, 0.5, 4.0)
	cshape.shape = box
	sb.add_child(cshape)
	platform.add_child(sb)

	var motion := ObjectMotionComponentClass.new()
	platform.add_child(motion)
	motion.setup(platform, {
		"motion_type": "waypoint",
		"trigger_mode": "always",
		"move_speed": 3.0,
		"waypoints": [[0, 0, 0], [15, 0, 0]]
	})

	# Step physics on platform
	motion._physics_process(1.0)

	_check("StaticBody3D constant_linear_velocity reflects platform speed",
		sb.constant_linear_velocity.is_equal_approx(Vector3(3.0, 0, 0)))

	# Create a CharacterBody3D player resting on the platform
	var player := CharacterBody3D.new()
	player.position = Vector3(0, 1.0, 0)
	var p_shape := CollisionShape3D.new()
	var p_capsule := CapsuleShape3D.new()
	p_capsule.radius = 0.4
	p_capsule.height = 1.8
	p_shape.shape = p_capsule
	player.add_child(p_shape)
	root.add_child(player)

	# Verify CharacterBody3D recognizes platform
	_check("Player CharacterBody3D instantiated cleanly", player != null)
	_check("Platform collision layer is active", sb.get_collision_layer_value(1))

	platform.queue_free()
	player.queue_free()