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// Copyright 2025 Shota FUJI
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at https://mozilla.org/MPL/2.0/.
//
// SPDX-License-Identifier: MPL-2.0

using GLib;

namespace TimeTracker.Storage {
	private class LocalEnvelope : Object {
		public string? parent { get; set; default = null; }
		public string id { get; construct; }
		public Event.EventType event_type { get; construct; }
		public string event_data { get; construct; }

		public LocalEnvelope(Event.Event event) throws Error {
			var node = Json.gobject_serialize(event);

			var generator = new Json.Generator();
			generator.set_root(node);

			Object(
				id: event.event_id,
				event_data: generator.to_data(null),
				event_type: Event.EventType.from_event(event)
			);
		}

		public static LocalEnvelope new_from_stream(InputStream stream) throws Error {
			var parser = new Json.Parser();
			parser.load_from_stream(stream);
			var node = parser.get_root();

			var envelope = Json.gobject_deserialize(typeof(LocalEnvelope), node) as LocalEnvelope;
			assert(envelope != null);

			return envelope;
		}

		public Event.Event parse_event() throws Error {
			var type = event_type.to_type();

			var parser = new Json.Parser();
			parser.load_from_data(event_data);
			var node = parser.get_root();

			var event = Json.gobject_deserialize(type, node) as Event.Event;
			assert(event != null);

			return event;
		}

		public void write_stream(OutputStream stream) throws Error {
			var node = Json.gobject_serialize(this);

			var generator = new Json.Generator();
			generator.set_root(node);
			generator.to_stream(stream);
		}
	}
}