extends SceneTree
## Minimal headless test runner for CI (used in place of an editor-based addon
## until a Godot editor workflow is introduced).
##
## Usage:
##   godot --headless --path . --script res://src/test/test_runner.gd
## Exit code 0 = all passed, 1 = failures.

const TestUtils := preload("res://src/test/test_utils.gd")
const TEST_DIR := "res://src/test/tests"

func _initialize() -> void:
	var test_files := _list_gd_files(TEST_DIR)
	var total_passed := 0
	var total_failed := 0
	var failures: Array[String] = []

	for path in test_files:
		var script: GDScript = load(path)
		if script == null:
			failures.append("Could not load %s" % path)
			total_failed += 1
			continue
		var instance: Object = script.new()
		TestUtils.reset()
		var suite_passed := 0
		var suite_failed := 0
		for method_info in instance.get_method_list():
			var method: StringName = method_info["name"]
			if not String(method).begins_with("test_"):
				continue
			if method_info["flags"] & METHOD_FLAG_STATIC:
				continue
			TestUtils.reset()
			var result: Variant = instance.call(method)
			var errored: bool = TestUtils._errors.size() > 0
			if result == true and not errored:
				suite_passed += 1
			else:
				suite_failed += 1
				var detail := ""
				if errored:
					detail = " :: " + TestUtils.report()
				failures.append("%s.%s%s" % [path.get_file(), method, detail])
		total_passed += suite_passed
		total_failed += suite_failed
		print("Suite %-42s pass=%d fail=%d" % [path.get_file(), suite_passed, suite_failed])

	print("")
	print("==================== TEST SUMMARY ====================")
	print("Passed: %d   Failed: %d" % [total_passed, total_failed])
	if failures.size() > 0:
		print("--------------------------------------------------")
		for f in failures:
			print("FAIL: %s" % f)
	print("======================================================")
	quit(0 if total_failed == 0 else 1)

func _list_gd_files(dir_path: String) -> Array[String]:
	var out: Array[String] = []
	var dir := DirAccess.open(dir_path)
	if dir == null:
		push_error("Cannot open test dir %s" % dir_path)
		return out
	dir.list_dir_begin()
	var file_name := dir.get_next()
	while file_name != "":
		if not dir.current_is_dir() and file_name.ends_with(".gd"):
			out.append(dir_path.path_join(file_name))
		file_name = dir.get_next()
	dir.list_dir_end()
	out.sort()
	return out