extends SceneTree

# Headless test: run with
#   godot --headless -s res://tests/test_setup_file_identity.gd
# A setup's id and its FILENAME are not the same thing. res://PlanetSetups/
# holds authored resources named however their author named them, and shipped
# content already contains a mismatch: ResearchLabSetup.tres holds setup_id
# "research_lab_1".
#
# The editor's save and delete both rebuilt the path from the id, which
# produced two bugs that looked unrelated:
#   - deleting such a setup looked for a file that does not exist, refused,
#     and reported nothing useful. It was always the same entry, so it read
#     as "the first item in the list cannot be deleted"
#   - saving such a setup wrote a SECOND file under the derived name and left
#     the original in place, so the pool then held two setups claiming one id
#     and the stale one could still be served
# A third bug hid behind those: rescan() re-read through Godot's resource
# CACHE, so even a correctly written file came back with its pre-save values.
# All three present identically to a player - "my change was not saved".
#
# Covers:
#   A. shipped content really does contain an id/filename mismatch, so this is
#      guarding a live case (checked read-only - see the note on isolation)
#   B. saving a mismatched setup writes back to ITS file and creates no twin
#   C. the edit is what the registry serves afterwards, cache and all
#   D. such a setup can be deleted
#   E. a brand-new setup still lands at PlanetSetups/<id>.tres
#
# ISOLATION: every mutation happens on a scratch file this test creates, never
# on shipped content. The suite runs tests in parallel against one project
# directory, and deleting a real setup mid-run - even briefly, even restored
# afterwards - would make some other test fail for reasons of its own.

const SCRATCH_FILE := "res://PlanetSetups/_identity_scratch_file.tres"
const SCRATCH_ID := "_identity_scratch_id"
const DERIVED_PATH := "res://PlanetSetups/_identity_scratch_id.tres"
const NEW_ID := "test_identity_new"
const NEW_PATH := "res://PlanetSetups/test_identity_new.tres"

var editor: Node
var elapsed: float = 0.0
var stage: int = 0


func _initialize() -> void:
	_cleanup()
	editor = load("res://surface/PlanetSetupEditor.tscn").instantiate()
	root.add_child(editor)


func _process(delta: float) -> bool:
	elapsed += delta
	if stage != 0:
		return false
	if elapsed < 0.15:
		return false
	stage = 1

	# --- A. shipped content has a mismatch (read-only) ---------------------
	var shipped_mismatch: String = ""
	for setup in PlanetSetups.all():
		var path: String = String(setup.resource_path)
		if path != "" and String(setup.setup_id) != path.get_file().get_basename():
			shipped_mismatch = "%s holds id '%s'" % [path.get_file(), setup.setup_id]
			break
	if shipped_mismatch == "":
		print("note: no shipped setup currently has an id/filename mismatch; the scratch case below still covers the behaviour")
	else:
		print("shipped mismatch present: %s" % shipped_mismatch)

	# A setup whose FILE NAME deliberately differs from its id.
	var scratch: Resource = load("res://surface/PlanetSetup.gd").new()
	scratch.setup_id = SCRATCH_ID
	scratch.display_name = "Identity Scratch"
	scratch.surface_profile_id = "rocky"
	scratch.research_point_reward = 1
	if ResourceSaver.save(scratch, SCRATCH_FILE) != OK:
		return _fail("could not write the scratch setup")
	PlanetSetups.rescan()
	if PlanetSetups.path_for_id(SCRATCH_ID) != SCRATCH_FILE:
		return _fail("the registry resolved '%s' to %s, not the file it lives in (%s)" \
			% [SCRATCH_ID, PlanetSetups.path_for_id(SCRATCH_ID), SCRATCH_FILE])
	print("'%s' lives in %s - id and filename disagree" % [SCRATCH_ID, SCRATCH_FILE.get_file()])

	# --- B/C. edit, save, and see the edit served -------------------------
	if not editor.load_setup(SCRATCH_ID):
		return _fail("the editor could not open '%s'" % SCRATCH_ID)
	var before: int = int(editor.current_setup.research_point_reward)
	editor._on_reward_pressed()
	var chosen: int = int(editor.current_setup.research_point_reward)
	if chosen == before:
		return _fail("cycling the reward did not change it")
	var outcome: Dictionary = editor.save_setup()
	if not outcome.ok:
		return _fail("saving failed: %s" % outcome.message)
	if FileAccess.file_exists(ProjectSettings.globalize_path(DERIVED_PATH)):
		return _fail("saving wrote a twin at %s instead of back to the file it was loaded from" % DERIVED_PATH)

	PlanetSetups.rescan()
	var served: Resource = PlanetSetups.find_by_id(SCRATCH_ID)
	if served == null:
		return _fail("'%s' vanished from the pool after saving" % SCRATCH_ID)
	if int(served.research_point_reward) != chosen:
		return _fail("saved reward %d but the pool still serves %d - the rescan read the resource cache rather than the file" \
			% [chosen, int(served.research_point_reward)])
	var duplicates: int = 0
	for setup in PlanetSetups.all():
		if String(setup.setup_id) == SCRATCH_ID:
			duplicates += 1
	if duplicates != 1:
		return _fail("the pool holds %d setups all claiming id '%s'" % [duplicates, SCRATCH_ID])
	print("reward %d -> %d saved back into %s, no twin, and the pool serves the edit" \
		% [before, chosen, SCRATCH_FILE.get_file()])

	# --- E. a NEW setup still lands under its id --------------------------
	editor.new_setup(NEW_ID, "Identity New", "rocky")
	editor.add_enemy("chaser", Vector2(20.0, 30.0))
	if not editor.save_setup().ok:
		return _fail("saving a brand-new setup failed")
	if not FileAccess.file_exists(ProjectSettings.globalize_path(NEW_PATH)):
		return _fail("a new setup did not land at %s" % NEW_PATH)
	PlanetSetups.rescan()
	if not editor.delete_setup(NEW_ID).ok:
		return _fail("could not delete the new setup")
	print("a new setup still saves to PlanetSetups/<id>.tres, and deletes again")

	# --- D. the mismatched setup can be deleted ---------------------------
	PlanetSetups.rescan()
	var deleted: Dictionary = editor.delete_setup(SCRATCH_ID)
	if not deleted.ok:
		return _fail("deleting '%s' failed: %s" % [SCRATCH_ID, deleted.message])
	if FileAccess.file_exists(ProjectSettings.globalize_path(SCRATCH_FILE)):
		return _fail("delete reported success but %s is still there" % SCRATCH_FILE)
	print("a setup whose filename differs from its id can be deleted")

	_cleanup()
	print("TEST_SETUP_FILE_IDENTITY: PASS")
	quit(0)
	return true


func _cleanup() -> void:
	for path in [SCRATCH_FILE, DERIVED_PATH, NEW_PATH]:
		var absolute: String = ProjectSettings.globalize_path(path)
		if FileAccess.file_exists(absolute):
			DirAccess.remove_absolute(absolute)
		if FileAccess.file_exists(absolute + ".uid"):
			DirAccess.remove_absolute(absolute + ".uid")
	PlanetSetups.rescan()


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