extends SceneTree
## Smoke test for the player character scene and its spawn behavior.
##
## Run with:
##     godot --headless --path . --script res://scripts/smoke_test_player.gd
##
## Loads the test level, verifies the player is present, spawned at the
## PlayerSpawn marker, and has the expected CharacterBody3D structure.

var passed := 0
var failed := 0


func _initialize() -> void:
	_run()


func _run() -> void:
	await process_frame

	# Load the test level scene (which now includes the player).
	var packed: PackedScene = load("res://scenes/worlds/test_level.tscn")
	var level: Node3D = packed.instantiate()
	root.add_child(level)
	await process_frame

	# 1. Verify the player node exists in the scene tree.
	var player: CharacterBody3D = level.get_node("Player") as CharacterBody3D
	_check("Player node exists in test level", player != null)
	_check("Player is a CharacterBody3D", player is CharacterBody3D)

	# 2. Verify the player has the expected child structure.
	var collision: CollisionShape3D = player.get_node("CollisionShape3D") as CollisionShape3D
	_check("Player has CollisionShape3D", collision != null)
	_check("CollisionShape3D has a shape", collision.shape != null)

	var mesh: MeshInstance3D = player.get_node("CapsuleMesh") as MeshInstance3D
	_check("Player has CapsuleMesh", mesh != null)
	_check("CapsuleMesh has a mesh", mesh.mesh != null)

	# 3. Verify the player spawned at the PlayerSpawn marker position.
	var spawn_marker: Marker3D = level.get_node("PlayerSpawn") as Marker3D
	_check("PlayerSpawn marker exists", spawn_marker != null)

	# The player's _ready() should have moved it to the spawn marker's
	# global position.  Since both are direct children of the root, their
	# global positions equal their local positions.
	var expected_pos: Vector3 = spawn_marker.global_position
	_check("Player spawned at PlayerSpawn position",
		   player.global_position == expected_pos)

	# 4. Verify the player script class_name is correct.
	var script: GDScript = player.get_script() as GDScript
	_check("Player has a script attached", script != null)
	_check("Player script is Player class", script is GDScript)

	# 5. Verify the player has movement constants defined.
	_check("Player has WALK_SPEED constant",
		   script.get_constant("WALK_SPEED") != null)
	_check("Player has GRAVITY constant",
		   script.get_constant("GRAVITY") != null)
	_check("Player has JUMP_VELOCITY constant",
		   script.get_constant("JUMP_VELOCITY") != null)

	print("\n=== SMOKE RESULT: %d/%d passed ===" % [passed, passed + failed])
	quit(0 if failed == 0 else 1)


func _check(description: String, condition: bool) -> void:
	if condition:
		print("  PASS: ", description)
		passed += 1
	else:
		printerr("  FAIL: ", description)
		failed += 1