import { Transaction } from "@codemirror/state";

enum UserEvent {
	INPUT = "input",
	INPUT_TYPE = "input.type",
	INPUT_TYPE_COMPOSE = "input.type.compose",
	INPUT_PASTE = "input.paste",
	INPUT_DROP = "input.drop",
	INPUT_COMPLETE = "input.complete",
	DELETE = "delete",
	DELETE_SELECTION = "delete.selection",
	DELETE_FORWARD = "delete.forward",
	DELETE_BACKWARDS = "delete.backward",
	DELETE_CUT = "delete.cut",
	MOVE = "move",
	MOVE_DROP = "move.drop",
	CURSOR_MOVED = "select",
	CURSOR_MOVED_BY_MOUSE = "select.pointer",
	UNDO = "undo",
	REDO = "redo",
}

// eslint-disable-next-line @typescript-eslint/no-namespace
namespace UserEvent {
	export function isDelete(event: UserEvent) {
		return event.contains("delete");
	}

	export function values_string(): Array<string> {
		return Object.values(UserEvent).map((event) => event.toString());
	}

	export function fromString(event: string) {
		const keys = Object.keys(UserEvent) as Array<keyof typeof UserEvent>;
		for (const key of keys) {
			if (event === UserEvent[key]) {
				return UserEvent[key] as UserEvent;
			}
		}
		return null;
	}

	export function fromTransaction(transaction: Transaction) {
		for (const inputType of UserEvent.values_string()) {
			if (transaction.isUserEvent(inputType)) {
				const event = UserEvent.fromString(inputType);
				if (event) {
					return event;
				}
			}
		}
		return null;
	}
}

export default UserEvent;