using System.Text.Json;
using RadicadeServer.RecNet.Enums;

namespace RadicadeServer.RecNet.VersionCheck
{
	public static class GameUpdateVersionCheck
	{

		public const string AppVersionUpdateNotificationId = "AppVersionUpdate";

		public const string AnnouncementConfigKey = "Announcement";

		public const string GameUpdateType = "Game Update";

		public const int UpdateStage = 1;

		public static VersionCheckResult Resolve(string? announcementJson, DateTime nowUtc)
			=> HasLiveGameUpdate(announcementJson, nowUtc)
				? new VersionCheckResult
				{
					VersionStatus = VersionCheckStatus.UpdateRequired,
					UpdateNotificationStage = UpdateStage
				}
				: new VersionCheckResult { VersionStatus = VersionCheckStatus.ValidForPlay };


		public static bool HasLiveGameUpdate(string? announcementJson, DateTime nowUtc)
		{
			if (string.IsNullOrWhiteSpace(announcementJson)) return false;

			try
			{
				using var doc = JsonDocument.Parse(announcementJson);
				if (doc.RootElement.ValueKind != JsonValueKind.Array) return false;

				foreach (var row in doc.RootElement.EnumerateArray())
				{
					if (row.ValueKind != JsonValueKind.Object) continue;
					if (!row.TryGetProperty("type", out var type) || type.ValueKind != JsonValueKind.String) continue;
					if (!string.Equals(type.GetString(), GameUpdateType, StringComparison.OrdinalIgnoreCase)) continue;

					if (row.TryGetProperty("expires_at", out var expires) && expires.ValueKind == JsonValueKind.String
						&& DateTime.TryParse(expires.GetString(), out var expiry) && expiry <= nowUtc)
						continue;

					return true;
				}
			}
			catch
			{
			}

			return false;
		}
	}
}