extends SceneTree
## End-to-end headless smoke test: register -> login -> fetch worlds list.
##
## Run with:
##     godot --headless --path . --script res://scripts/smoke_test_e2e.gd
##
## Requires the backend to be running (default base URL
## `application/agp/api_base_url` -> http://127.0.0.1:8000, overridable via
## the AGP_API_BASE_URL environment variable).
##
## Steps:
##   1. Health check  GET  /api/health          -> 200, {"status": "ok"}
##   2. Register      POST /api/auth/register   -> 201, access_token present
##   3. Login         POST /api/auth/login      -> 200, access_token present
##   4. Worlds list   GET  /api/worlds          -> 200, JSON array
##
## Exits 0 if all steps pass, 1 otherwise. If the backend is unreachable the
## health check fails with a clear message and the script exits 1 immediately.

# Fixed credentials from the task spec. The username gets a unique numeric
# suffix so the test stays re-runnable (a second run would otherwise hit
# "Username already registered" on step 2).
const TEST_USERNAME_BASE := "smoke_test_user"
const TEST_EMAIL := "smoke@test.com"
const TEST_PASSWORD := "TestPass123"
const TEST_DOB := "2000-01-01"


func _initialize() -> void:
	_run()


func _run() -> void:
	# _initialize() fires before the first frame; wait one frame so freshly
	# created HTTPRequest nodes are reliably inside the tree.
	await process_frame

	# In --script mode the autoload is reachable via get_node(), not as a
	# bare identifier (bare identifiers fail to resolve at compile time here).
	var api := root.get_node("ApiClient")
	assert(api != null, "ApiClient autoload not found in the scene tree")

	var unique_id := int(Time.get_unix_time_from_system() * 1000)
	var username := "%s_%d" % [TEST_USERNAME_BASE, unique_id]
	var email := "smoke_%d@test.com" % unique_id

	var results := {}

	# --- Step 1: Health check -------------------------------------------------
	print("\n=== Step 1: Health check (GET /api/health) ===")
	var health: Dictionary = await api.health_check()
	var health_ok: bool = (
		health.ok
		and health.status == 200
		and health.data is Dictionary
		and str((health.data as Dictionary).get("status", "")) == "ok"
	)
	_record(results, "health", health_ok, "status=%d data=%s" % [
		health.status, health.data
	])

	if not health.ok or health.status == 0:
		printerr("\nERROR: Backend is not reachable at the configured base URL.")
		printerr("       detail: %s" % health.detail)
		printerr("       Start the backend first (see backend/README), then re-run:")
		printerr("       godot --headless --path . --script res://scripts/smoke_test_e2e.gd")
		_summarize(results)
		quit(1)
		return

	# --- Step 2: Register -----------------------------------------------------
	print("\n=== Step 2: Register (POST /api/auth/register) ===")
	var reg: Dictionary = await api.register(username, email, TEST_PASSWORD, TEST_DOB)
	var reg_token := _extract_token(reg)
	var reg_ok: bool = (
		reg.ok
		and reg.status == 201
		and reg_token != ""
	)
	_record(results, "register", reg_ok, "status=%d token=%s detail=%s" % [
		reg.status, "yes" if reg_token != "" else "no", reg.detail
	])

	# --- Step 3: Login --------------------------------------------------------
	print("\n=== Step 3: Login (POST /api/auth/login) ===")
	var login: Dictionary = await api.login(username, TEST_PASSWORD)
	var login_token := _extract_token(login)
	var login_ok: bool = (
		login.ok
		and login.status == 200
		and login_token != ""
	)
	_record(results, "login", login_ok, "status=%d token=%s detail=%s" % [
		login.status, "yes" if login_token != "" else "no", login.detail
	])

	# --- Step 4: Worlds list ---------------------------------------------------
	print("\n=== Step 4: Worlds list (GET /api/worlds) ===")
	# login/register already stored the token; make the auth header explicit by
	# re-applying the extracted token so step 4 is independent of storage order.
	if login_token != "":
		api.set_token(login_token)
	var worlds: Dictionary = await api.get_worlds()
	var worlds_ok: bool = (
		worlds.ok
		and worlds.status == 200
		and worlds.data is Array
	)
	_record(results, "worlds", worlds_ok, "status=%d is_array=%s count=%d detail=%s" % [
		worlds.status,
		"yes" if (worlds.data is Array) else "no",
		(worlds.data as Array).size() if (worlds.data is Array) else -1,
		worlds.detail,
	])

	# --- Summary ---------------------------------------------------------------
	_summarize(results)


func _extract_token(result: Dictionary) -> String:
	if result.ok and result.data is Dictionary:
		return str((result.data as Dictionary).get("access_token", ""))
	return ""


func _record(results: Dictionary, name: String, ok: bool, detail: String) -> void:
	results[name] = {"ok": ok, "detail": detail}
	if ok:
		print("  PASS: %s" % detail)
	else:
		printerr("  FAIL: %s" % detail)


func _summarize(results: Dictionary) -> void:
	var all_pass := true
	print("\n=== Smoke test summary ===")
	for step in ["health", "register", "login", "worlds"]:
		var entry: Dictionary = results.get(step, {"ok": false, "detail": "not run"})
		if not entry["ok"]:
			all_pass = false
		print("  %-8s : %s" % [step, "PASS" if entry["ok"] else "FAIL"])

	if all_pass:
		print("SMOKE RESULT: ALL PASS (4/4)")
		quit(0)
	else:
		printerr("SMOKE RESULT: FAIL")
		quit(1)