package com.mojang.realmsclient.dto;

import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.mojang.logging.LogUtils;
import com.mojang.realmsclient.util.JsonUtils;
import java.time.Instant;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import org.jspecify.annotations.Nullable;
import org.slf4j.Logger;

public class Backup extends ValueObject {
	private static final Logger LOGGER = LogUtils.getLogger();
	public final String backupId;
	public final Instant lastModified;
	public final long size;
	public boolean uploadedVersion;
	public final Map<String, String> metadata;
	public final Map<String, String> changeList = new HashMap<>();

	private Backup(final String backupId, final Instant lastModified, final long size, final Map<String, String> metadata) {
		this.backupId = backupId;
		this.lastModified = lastModified;
		this.size = size;
		this.metadata = metadata;
	}

	public ZonedDateTime lastModifiedDate() {
		return ZonedDateTime.ofInstant(this.lastModified, ZoneId.systemDefault());
	}

	public static @Nullable Backup parse(final JsonElement node) {
		JsonObject object = node.getAsJsonObject();

		try {
			String backupId = JsonUtils.getStringOr("backupId", object, "");
			Instant lastModifiedDate = JsonUtils.getDateOr("lastModifiedDate", object);
			long size = JsonUtils.getLongOr("size", object, 0L);
			Map<String, String> metadata = new HashMap<>();
			if (object.has("metadata")) {
				JsonObject metadataObject = object.getAsJsonObject("metadata");

				for (Entry<String, JsonElement> elem : metadataObject.entrySet()) {
					if (!elem.getValue().isJsonNull()) {
						metadata.put(elem.getKey(), elem.getValue().getAsString());
					}
				}
			}

			return new Backup(backupId, lastModifiedDate, size, metadata);
		} catch (Exception e) {
			LOGGER.error("Could not parse Backup", e);
			return null;
		}
	}
}