extends SceneTree

## P05-02 F6, writer phase. Plays the day script, writes ordinary save files at
## mid-day, just before the day 2 00:00 close and just after it, and hands the
## exact save packages to the reader suite (test_p05_funds_restart_2_read.gd),
## which runs as a separate engine process. The handoff is the declared generated
## report res://artifacts/p05-02/restart-handoff.json
## (tools/regression/suite-policy.json fixed_generated_report_routes).

const Fixture := preload("res://tests/helpers/p05_funds_restart_fixture.gd")

var _checks := 0
var _failures := 0


func _initialize() -> void:
	call_deferred("_run")


func _run() -> void:
	print("P05-02: restart writer")
	var fixtures := Fixture.new(_expect)
	var straight := fixtures.new_fixture()
	fixtures.play(straight, 0, Fixture.LAST_MINUTE, Callable())
	var straight_runtime: Variant = straight[&"runtime"]
	_expect(straight_runtime.economy_service.get_balance(Fixture.FRONT) == 35 and straight_runtime.economy_service.get_balance(Fixture.BACK) == 695, "uninterrupted day script ends with front 35 and hidden 695")
	_expect(fixtures.category_count(straight_runtime, [FinancePolicy.TOP_UP_CATEGORY]) == 1, "uninterrupted day script tops up once (day 2)")
	var saving := fixtures.new_fixture()
	var saved_paths: Dictionary = {}
	fixtures.play(saving, 0, Fixture.LAST_MINUTE, func(minute: int) -> void:
		if minute in Fixture.SAVE_MINUTES:
			var path := Fixture.WRITER_SAVE % minute
			_expect(bool(saving[&"runtime"].save_to_path(path).get(&"ok", false)), "save file at minute %d" % minute)
			saved_paths[minute] = path)
	_expect(fixtures.economy_bytes(saving[&"runtime"]) == fixtures.economy_bytes(straight_runtime), "writing the save files leaves the ledger as without saving")
	var saves: Array = []
	for minute: int in Fixture.SAVE_MINUTES:
		var directory := ProjectSettings.globalize_path(str(saved_paths.get(minute, Fixture.WRITER_SAVE % minute)))
		_expect(DirAccess.dir_exists_absolute(directory) and DirAccess.get_directories_at(directory).is_empty(), "save package at minute %d holds only files" % minute)
		var files := {}
		for name: String in DirAccess.get_files_at(directory):
			var bytes := FileAccess.get_file_as_bytes(directory.path_join(name))
			files[name] = {"sha256": Fixture.sha256(bytes), "bytes": bytes.size(), "base64": Marshalls.raw_to_base64(bytes)}
		_expect(files.has("manifest.json") and files.has("world.bin"), "save package at minute %d has its manifest and world" % minute)
		saves.append({"minute": minute, "files": files})
	var handoff := {
		"schema": Fixture.HANDOFF_SCHEMA,
		"writer_pid": OS.get_process_id(),
		"writer_source_sha256": FileAccess.get_sha256(Fixture.WRITER_SOURCE),
		"seed": Fixture.SEED,
		"last_minute": Fixture.LAST_MINUTE,
		"straight_economy_sha256": Fixture.sha256(fixtures.economy_bytes(straight_runtime)),
		"straight_days_base64": Marshalls.raw_to_base64(var_to_bytes(fixtures.days_value(straight_runtime))),
		"saves": saves,
	}
	DirAccess.make_dir_recursive_absolute(Fixture.HANDOFF_PATH.get_base_dir())
	var file := FileAccess.open(Fixture.HANDOFF_PATH, FileAccess.WRITE)
	_expect(file != null, "handoff file opens for writing")
	if file != null:
		file.store_string(JSON.stringify(handoff, "\t") + "\n")
		file.close()
	print("P05_RESTART_WRITER pid=%d handoff_sha256=%s" % [OS.get_process_id(), FileAccess.get_sha256(Fixture.HANDOFF_PATH)])
	fixtures.free_fixture(straight)
	fixtures.free_fixture(saving)
	await process_frame
	if _failures == 0:
		print("PASS: %d checks" % _checks)
	else:
		push_error("FAIL: %d of %d checks failed" % [_failures, _checks])
	quit(_failures)


func _expect(condition: bool, message: String) -> void:
	_checks += 1
	if not condition:
		_failures += 1
		push_error(message)