class_name ActionEffectCommitResult
extends RefCounted

var _committed := false
var _rolled_back := false
var _event_ids: Array[int] = []
var _reason_code: StringName
var _message := ""
var _reason_trace: Array[StringName] = []
var _valid := false


func _init(
	committed: bool = false,
	rolled_back: bool = false,
	event_ids: Array = [],
	reason_code: StringName = &"",
	message: String = "",
	reason_trace: Array = []
) -> void:
	_committed = committed
	_rolled_back = rolled_back
	_reason_code = reason_code
	_message = message
	_valid = true
	var seen_event_ids := {}
	for event_id_value in event_ids:
		if event_id_value is not int or int(event_id_value) < 0:
			_valid = false
			continue
		var event_id := int(event_id_value)
		if seen_event_ids.has(event_id):
			_valid = false
		seen_event_ids[event_id] = true
		_event_ids.append(event_id)
	for trace_value in reason_trace:
		if trace_value is not String and trace_value is not StringName:
			_valid = false
			continue
		var trace_id := StringName(trace_value)
		if trace_id.is_empty():
			_valid = false
			continue
		_reason_trace.append(trace_id)
	if _reason_trace.is_empty():
		_valid = false
	if _committed:
		_valid = (
			_valid
			and not _rolled_back
			and not _event_ids.is_empty()
			and _reason_code.is_empty()
			and _message.is_empty()
		)
	else:
		_valid = (
			_valid
			and _rolled_back
			and _event_ids.is_empty()
			and not _reason_code.is_empty()
			and not _message.is_empty()
		)


static func committed(
	event_ids: Array, reason_trace: Array = [&"whole_plan_committed"]
) -> ActionEffectCommitResult:
	return ActionEffectCommitResult.new(true, false, event_ids, &"", "", reason_trace)


static func rollback_safe_failure(
	reason_code: StringName, message: String, reason_trace: Array
) -> ActionEffectCommitResult:
	return ActionEffectCommitResult.new(false, true, [], reason_code, message, reason_trace)


func is_valid() -> bool:
	return _valid


func did_commit() -> bool:
	return _committed


func was_rolled_back() -> bool:
	return _rolled_back


func get_event_ids() -> Array[int]:
	return _event_ids.duplicate()


func get_reason_code() -> StringName:
	return _reason_code


func get_message() -> String:
	return _message


func get_reason_trace() -> Array[StringName]:
	return _reason_trace.duplicate()