using Microsoft.EntityFrameworkCore;
using RadicadeServer.DB;
using RadicadeServer.Extensions;
using RadicadeServer.RecNet;
using RadicadeServer.RecNet.Accounts;
using RadicadeServer.RecNet.Enums;
using RadicadeServer.RecNet.Enums.Messages;
using RadicadeServer.RecNet.Enums.Rooms;
using RadicadeServer.RecNet.Messages;
using RadicadeServer.RecNet.Rooms;

namespace RadicadeServer.Utils
{
	public static class RoomUtils
	{
		public static IDbContextFactory<RecDBContext> DbFactory = null!;

		public static async Task<bool> VerifyRole(long playerId, long roomId, RoleType roleType)
		{
			var role = await GetRoleForPlayer(playerId, roomId);
			if (role == null) return false;

			return role.Role >= roleType;
		}

		public static async Task<bool> CanSeeRoom(RoomData room, long? accountId)
		{
			if (room.Accessibility != Accessibility.Private) return true;
			if (accountId == null) return false;
			if (room.CreatorAccountId == accountId.Value) return true;
			if (await VerifyRole(accountId.Value, room.RoomId, RoleType.CoOwner)) return true;

			if (DbFactory != null)
			{
				await using var db = await DbFactory.CreateDbContextAsync();
				if (await (
					from presence in db.Presences.AsNoTracking()
					join instance in db.RoomInstances.AsNoTracking()
						on presence.roomInstance equals instance.roomInstanceId
					where presence.playerId == accountId.Value && presence.isOnline &&
						instance.roomId == room.RoomId
					select presence.playerId).AnyAsync()) return true;
			}

			return await HasLiveGameInvite(room.RoomId, accountId.Value);
		}

		public static async Task<bool> HasLiveGameInvite(long roomId, long accountId)
		{
			if (DbFactory == null) return false;

			await using var db = await DbFactory.CreateDbContextAsync();

			long? inviter = await db.Messages.AsNoTracking()
				.Where(message =>
					message.ToPlayerId == accountId &&
					(message.Type == MessageType.GameInvite || message.Type == MessageType.GameInviteV2) &&
					message.RoomId == roomId)
				.OrderByDescending(message => message.Id)
				.Select(message => (long?)message.FromPlayerId)
				.FirstOrDefaultAsync();
			if (inviter == null) return false;

			return await (
				from presence in db.Presences.AsNoTracking()
				join instance in db.RoomInstances.AsNoTracking()
					on presence.roomInstance equals instance.roomInstanceId
				where presence.playerId == inviter.Value &&
					presence.isOnline &&
					instance.roomId == roomId
				select presence.playerId).AnyAsync();
		}

		public static async Task<List<RoomData>> VisibleRooms(IEnumerable<RoomData> rooms, long? accountId)
		{
			var visible = new List<RoomData>();
			foreach (var room in rooms)
			{
				if (await CanSeeRoom(room, accountId)) visible.Add(room);
			}
			return visible;
		}

		public const string PrivateRoomName = "PRIVATE ROOM";

		public static async Task<bool> IsHiddenFrom(RoomData room, long? accountId)
			=> !room.IsDorm && !await CanSeeRoom(room, accountId);

		public static FullRoom MaskHiddenRoom(RoomData room)
		{
			return new FullRoom
			{
				RoomId = room.RoomId,
				Name = PrivateRoomName,
				Description = string.Empty,
				ImageName = DBConfig.DefaultRoomImage,
				IsDorm = false,
				State = room.State,
				Accessibility = Accessibility.Private,
				CreatedAt = room.CreatedAt,
				CreatorAccountId = room.CreatorAccountId,
				MaxPlayers = room.MaxPlayers,
				MaxPlayerCalculationMode = room.MaxPlayerCalculationMode,
				CloningAllowed = false,
				DisableRoomComments = true,
				CustomWarning = string.Empty,
				SubRooms = new List<SubRoom>(),
				Roles = new List<RoomRole>(),
				LoadScreens = new List<RoomLoadScreen>(),
				PromoImages = new List<string>(),
				PromoExternalContent = new List<ExternalContent>(),
				DataBlob = string.Empty,
				Tags = new List<ItemTag>(),
				Stats = new RoomStats { RoomId = room.RoomId },
				Version = 1
			};
		}

		public static async Task<RoomInstance?> ForViewerAsync(RoomInstance? instance, long? viewerId)
		{
			if (instance == null) return null;

			await using var db = await DbFactory.CreateDbContextAsync();
			var room = await db.Rooms.AsNoTracking().FirstOrDefaultAsync(x => x.RoomId == instance.roomId);
			if (room == null || !await IsHiddenFrom(room, viewerId)) return instance;

			var masked = instance.Copy();
			masked.name = PrivateRoomName;
			return masked;
		}
		public static async Task<List<RoomRole>> GetRoles(long roomId)
		{
			await using var db = await DbFactory.CreateDbContextAsync();

			var room = await db.Rooms.AsNoTracking().FirstOrDefaultAsync(x => x.RoomId == roomId);
			if (room == null) return [];

			var roomRole = await db.RoomRoles.AsNoTracking().Where(x => x.RoomId == roomId).ToListAsync();

			var creatorRow = roomRole.FirstOrDefault(x => x.AccountId == room.CreatorAccountId);
			if (creatorRow == null)
				roomRole.Add(new RoomRole { AccountId = room.CreatorAccountId, InvitedRole = RoleType.None, Role = RoleType.Creator, RoomId = roomId });
			else if (creatorRow.Role < RoleType.Creator)
				creatorRow.Role = RoleType.Creator;

			if (room.IsRRO)
			{
				var rroOwners = (await db.ServerConfig.AsNoTracking().FirstOrDefaultAsync(x => x.Key == "HighRanks"))?.Value;

				foreach (var dev in (rroOwners ?? string.Empty).Split(',', StringSplitOptions.TrimEntries | StringSplitOptions.RemoveEmptyEntries))
				{
					if (!long.TryParse(dev, out long userId)) continue;

					foreach (var role in new[] { RoleType.Creator, RoleType.Moderator })
					{
						if (roomRole.Any(x => x.AccountId == userId && x.Role == role)) continue;

						roomRole.Add(new RoomRole { AccountId = userId, InvitedRole = RoleType.None, Role = role, RoomId = roomId });
					}
				}
			}

			return roomRole;
		}
		public static async Task<RoomRole?> GetRoleForPlayer(long playerId, long roomId)
		{
			var roomRoles = await GetRoles(roomId);

			return roomRoles
				.Where(x => x.AccountId == playerId)
				.OrderByDescending(x => x.Role)
				.FirstOrDefault();
		}

		public static SubRoomDataSave BuildCurrentSave(SubRoom subRoom)
		{
			return new SubRoomDataSave
			{
				SubRoomDataSaveId = 1,
				SubRoomId = subRoom.SubRoomId,
				DataBlob = subRoom.DataBlob,
				SavedByAccountId = subRoom.SavedByAccountId,
				CreatedAt = subRoom.CreatedAt,
				UnityAssetId = string.IsNullOrEmpty(subRoom.UnityAssetId) ? null : subRoom.UnityAssetId,
				PersistenceVersion = 1,
				OMVersion = 1,
				UgcSubVersion = 1,
				SavedOnPlatform = 0,
				SavedOnDeviceClass = 0,
				Description = string.Empty,
				ModerationState = 0
			};
		}

		public static object BuildSaveResponse(SubRoom subRoom, string? dataBlobHash)
		{
			return new
			{
				subRoomDataSaveId = 1L,
				subRoomId = subRoom.SubRoomId,
				unityAssetId = string.IsNullOrEmpty(subRoom.UnityAssetId) ? null : subRoom.UnityAssetId,
				unityAsset = (string?)null,
				unityAssetHash = (string?)null,
				dataBlob = subRoom.DataBlob ?? string.Empty,
				dataBlobHash,
				savedByAccountId = (long?)subRoom.SavedByAccountId,
				savedOnPlatform = 0,
				savedOnDeviceClass = 0,
				description = string.Empty,
				createdAt = subRoom.CreatedAt
			};
		}

		public static async Task<List<SubRoomDataSave>> GetSaveHistory(RecDBContext ctx, long roomId, long subRoomId)
		{
			var subRoom = await ctx.SubRooms.AsNoTracking()
				.FirstOrDefaultAsync(x => x.RoomId == roomId && x.SubRoomId == subRoomId);

			if (subRoom == null) return new List<SubRoomDataSave>();

			var saves = new List<SubRoomDataSave>();

			if (!string.IsNullOrEmpty(subRoom.DataBlob)) saves.Add(BuildCurrentSave(subRoom));

			var history = await ctx.SubRoomHistory.AsNoTracking()
				.Where(x => x.RoomId == roomId && x.SubRoomId == subRoomId && x.DataBlob != "")
				.OrderByDescending(x => x.CreatedAt)
				.ThenByDescending(x => x.HistoryId)
				.ToListAsync();

			saves.AddRange(history.Select(BuildRestorableSave));

			return saves;
		}

		public static SubRoomDataSave BuildRestorableSave(RestorableSubRoom row)
		{
			return new SubRoomDataSave
			{
				SubRoomDataSaveId = row.HistoryId + 1,
				SubRoomId = row.SubRoomId,
				DataBlob = row.DataBlob,
				SavedByAccountId = row.SavedByAccountId,
				CreatedAt = row.CreatedAt,
				PersistenceVersion = 1,
				OMVersion = 1,
				UgcSubVersion = 1,
				SavedOnPlatform = 0,
				SavedOnDeviceClass = 0,
				Description = string.Empty,
				ModerationState = 0
			};
		}

		public static FullRoom ConvertToFull(this RoomData room, List<SubRoom> subRooms, RoomStats stats, List<RoomRole> roles)
		{
			FullRoom fullRoom = new FullRoom
			{
				Name = room.Name,
				RoomId = room.RoomId,
				Description = room.Description ?? string.Empty,
				ImageName = room.ImageName,
				IsRRO = room.IsRRO,
				IsDeveloperOwned = room.IsDeveloperOwned,
				IsDorm = room.IsDorm,
				State = room.State,
				Accessibility = room.Accessibility,
				CreatedAt = room.CreatedAt,
				CreatorAccountId = room.CreatorAccountId,
				SupportsJuniors = room.SupportsJuniors,
				SupportsLevelVoting = room.SupportsLevelVoting,
				SupportsMobile = room.SupportsMobile,
				SupportsQuest2 = room.SupportsQuest2,
				SupportsScreens = room.SupportsScreens,
				SupportsTeleportVR = room.SupportsTeleportVR,
				SupportsVRLow = room.SupportsVRLow,
				SupportsWalkVR = room.SupportsWalkVR,
				EncryptVoiceChat = room.EncryptVoiceChat,
				MaxPlayerCalculationMode = room.MaxPlayerCalculationMode,
				MaxPlayers = room.MaxPlayers,
				SubRooms = subRooms,
				Stats = stats,
				CloningAllowed = room.CloningAllowed,
				CustomWarning = room.CustomWarning ?? string.Empty,
				Roles = roles,
				DataBlob = null,
				Tags = StringTools.ReadTags(room.Tags),
				LoadScreens = room.loadScreen.FromJson<List<RoomLoadScreen>>() ?? new(),
				WarningMask = room.WarningMask,
				Version = room.Version,
				DisableRoomComments = room.DisableRoomComments,
				DisableMicAutoMute = room.DisableMicAutoMute,
				MinLevel = room.MinLevel
			};

			foreach (var subRoom in subRooms)
			{
				subRoom.CurrentSave = string.IsNullOrEmpty(subRoom.DataBlob) ? null : BuildCurrentSave(subRoom);

				subRoom.CreatorAccountId = subRoom.SavedByAccountId != 0 ? subRoom.SavedByAccountId : null;
			}

			return fullRoom;
		}

		public static async Task<List<FullRoom>> BulkConvertRoomData(List<RoomData> data)
		{
			var fullRooms = new List<FullRoom>();
			foreach (var d in data)
			{
				var found = await GetRoom(d.RoomId);
				if (found != null)
					fullRooms.Add(found);
			}
			return fullRooms;
		}
		public static async Task<List<RoomDetail>> BulkConvertRoomDataToRoomDetail(List<RoomData> data)
		{
			var rooms = new List<RoomDetail>();
			foreach (var d in data)
			{
				var found = await GetRoom(d.RoomId);
				if (found != null)
					rooms.Add(found);
			}
			return rooms;
		}

		public static async Task<FullRoom?> GetRoom(string Name)
		{
			await using var ctx = await DbFactory.CreateDbContextAsync();

			var room = await ctx.Rooms.AsNoTracking().FirstOrDefaultAsync((x) => x.Name == Name);
			if (room == null && !string.IsNullOrWhiteSpace(Name) && Name.StartsWith("@", StringComparison.Ordinal) && Name.EndsWith("'s Dorm", StringComparison.OrdinalIgnoreCase))
			{
				var username = Name.Substring(1, Name.Length - 8);
				var owner = await ctx.Profiles.AsNoTracking().FirstOrDefaultAsync(x => x.username == username || x.displayName == username);
				if (owner != null)
				{
					room = await ctx.Rooms.AsNoTracking().FirstOrDefaultAsync(x => x.IsDorm && x.CreatorAccountId == owner.accountId);
				}
			}
			if (room == null) return null;

			return await GetRoom(room.RoomId);
		}
		public static async Task<FullRoom?> GetRoom(long Id)
		{
			await using var ctx = await DbFactory.CreateDbContextAsync();

			var room = await ctx.Rooms.AsNoTracking().FirstOrDefaultAsync((x) => x.RoomId == Id);
			if (room == null) return null;

			var cheers = await ctx.RoomInteractions.AsNoTracking().CountAsync(x => x.RoomId == Id && x.Cheered);
			var favourites = await ctx.RoomInteractions.AsNoTracking().CountAsync(x => x.RoomId == Id && x.Favorited);
			var visitorCount = await ctx.RoomInteractions.AsNoTracking().CountAsync(x => x.RoomId == Id && x.Visited);
			var visitCount = await ctx.RoomInteractions.AsNoTracking()
				.Where(x => x.RoomId == Id && x.Visited)
				.SumAsync(x => (int?)x.VisitCount) ?? 0;

			var roomStats = new RoomStats { CheerCount = cheers, FavoriteCount = favourites, RoomId = Id, VisitCount = visitCount, VisitorCount = visitorCount };

			var roomRoles = await GetRoles(Id);

			var subRooms = await ctx.SubRooms.AsNoTracking().Where((x) => x.RoomId == Id).ToListAsync();

			var missingBlobs = subRooms
				.Where(x => !string.IsNullOrEmpty(x.DataBlob) && !File.Exists(Path.Join(DBConfig.CDNStorage, x.DataBlob)))
				.ToList();

			if (missingBlobs.Count > 0)
			{
				var missingIds = missingBlobs.Select(x => x.SubRoomId).ToList();

				var candidates = await ctx.SubRoomHistory.AsNoTracking()
					.Where(x => missingIds.Contains(x.SubRoomId) && x.DataBlob != "")
					.OrderByDescending(x => x.CreatedAt)
					.ToListAsync();

				foreach (var subRoom in missingBlobs)
				{
					var recovered = candidates
						.Where(x => x.SubRoomId == subRoom.SubRoomId)
						.Select(x => x.DataBlob)
						.FirstOrDefault(blob => !string.IsNullOrEmpty(blob) && File.Exists(Path.Join(DBConfig.CDNStorage, blob)));

					subRoom.DataBlob = recovered ?? "";
					ctx.SubRooms.Attach(subRoom);
					ctx.Entry(subRoom).Property(x => x.DataBlob).IsModified = true;
				}

				await ctx.SaveChangesAsync();
			}

			return room.ConvertToFull(subRooms, roomStats, roomRoles);
		}

		public static async Task<RoomStats?> GetRoomStats(long roomId, long? playerId)
		{
			await using var ctx = await DbFactory.CreateDbContextAsync();

			var cheers = await ctx.RoomInteractions.AsNoTracking().CountAsync(x => x.RoomId == roomId && x.Cheered);
			var favourites = await ctx.RoomInteractions.AsNoTracking().CountAsync(x => x.RoomId == roomId && x.Favorited);

			var visitorCount = await ctx.RoomInteractions.AsNoTracking().CountAsync(x => x.RoomId == roomId && x.Visited);

			var visited = 0;
			if (playerId != null)
			{
				var interaction = await ctx.RoomInteractions.AsNoTracking()
					.FirstOrDefaultAsync(x => x.RoomId == roomId && x.PlayerId == playerId);

				if (interaction != null)
					visited = interaction.VisitCount;
			}

			return new RoomStats() { CheerCount = cheers, FavoriteCount = favourites, RoomId = roomId, VisitCount = visited, VisitorCount = visitorCount };
		}


		public static async Task<FullRoom?> CloneRoom(long originalRoomId, long newCreator, string newName)
		{
			await using var ctx = await DbFactory.CreateDbContextAsync();

			FullRoom? room = await GetRoom(originalRoomId);
			if (room == null)
				return null;



			var tags = room.Tags;
			var rro = tags.Find(x => x.Tag.StartsWith("rro") && x.Type >= TagType.Auto);
			if (rro != null)
				tags.Remove(rro);

			RoomData roomData = new RoomData
			{
				State = RoomState.Active,
				SupportsJuniors = room.SupportsJuniors,
				SupportsLevelVoting = room.SupportsLevelVoting,
				SupportsMobile = room.SupportsMobile,
				SupportsQuest2 = room.SupportsQuest2,
				SupportsScreens = room.SupportsScreens,
				SupportsTeleportVR = room.SupportsTeleportVR,
				SupportsVRLow = room.SupportsVRLow,
				SupportsWalkVR = room.SupportsWalkVR,
				Accessibility = Accessibility.Private,
				CloningAllowed = false,
				CreatedAt = DateTime.Now,
				CreatorAccountId = newCreator,
				CustomWarning = room.CustomWarning,
				Description = room.Description,
				DisableMicAutoMute = room.DisableMicAutoMute,
				DisableRoomComments = room.DisableRoomComments,
				EncryptVoiceChat = room.EncryptVoiceChat,
				ImageName = room.ImageName,
				IsDorm = room.IsDorm,
				IsRRO = false,

				IsDeveloperOwned = !room.IsDorm && await ctx.IsDeveloper(newCreator),
				MaxPlayerCalculationMode = room.MaxPlayerCalculationMode,
				MaxPlayers = room.MaxPlayers,
				MinLevel = room.MinLevel,
				Name = newName,
				Tags = StringTools.CreateTagString(tags),
				WarningMask = room.WarningMask,
			};

			await ctx.AddAsync(roomData);
			await ctx.SaveChangesAsync();


			if (room.SubRooms == null || room.SubRooms.Count == 0)
			{
				ctx.Remove(roomData);
				await ctx.SaveChangesAsync();
				return null;
			}

			foreach (SubRoom subRoom in room.SubRooms)
			{
				if (subRoom == null) continue;
				await ctx.SubRooms.AddAsync(new SubRoom
				{
					Accessibility = subRoom.Accessibility,
					DataBlob = subRoom.DataBlob,
					UnityAssetId = subRoom.UnityAssetId,
					IsSandbox = subRoom.IsSandbox,
					UnitySceneId = subRoom.UnitySceneId,
					MaxPlayers = subRoom.MaxPlayers,
					Name = subRoom.Name,
					RoomId = roomData.RoomId
				});
			}

			await ctx.SaveChangesAsync();


			await ctx.RoomStats.AddAsync(new RoomStats
			{
				RoomId = roomData.RoomId,
				FavoriteCount = 0,
				CheerCount = 0,
				VisitCount = 0,
				VisitorCount = 0,
			});


			await ctx.RoomRoles.AddAsync(new RoomRole
			{
				RoomId = roomData.RoomId,
				Role = RoleType.Creator,
				InvitedRole = RoleType.None,
				AccountId = newCreator
			});

			await ctx.SaveChangesAsync();

			return await GetRoom(roomData.RoomId);
		}

		private static async Task<FullRoom?> GetDormTemplateRoom()
		{
			var templateRoom = await GetRoom(1);
			if (templateRoom != null) return templateRoom;

			await using var ctx = await DbFactory.CreateDbContextAsync();
			var template = await ctx.Rooms.AsNoTracking().FirstOrDefaultAsync(room => room.IsDorm && room.CreatorAccountId == 1);
			return template == null ? null : await GetRoom(template.RoomId);
		}

		public static async Task<FullRoom?> GetOrCreateDorm(long playerId)
		{
			await using var ctx = await DbFactory.CreateDbContextAsync();

			var roomData = await ctx.Rooms.AsNoTracking().FirstOrDefaultAsync((x) => x.IsDorm && x.CreatorAccountId == playerId);
			if (roomData == null)
			{
				var templateRoom = await GetDormTemplateRoom();
				if (templateRoom == null)
				{
					return null;
				}

				return await CloneRoom(templateRoom.RoomId, playerId, "DormRoom");
			}


			var hasSubRoom = await ctx.SubRooms.AnyAsync(s => s.RoomId == roomData.RoomId);
			if (!hasSubRoom)
			{
				var templateRoom = await GetDormTemplateRoom();
				var templateSub = templateRoom?.SubRooms?.FirstOrDefault();
				if (templateSub != null)
				{
					await ctx.SubRooms.AddAsync(new SubRoom
					{
						RoomId       = roomData.RoomId,
						DataBlob     = templateSub.DataBlob,
						UnityAssetId = templateSub.UnityAssetId,
						IsSandbox    = templateSub.IsSandbox,
						UnitySceneId = templateSub.UnitySceneId,
						MaxPlayers   = templateSub.MaxPlayers,
						Name         = templateSub.Name,
						Accessibility = templateSub.Accessibility
					});
					await ctx.SaveChangesAsync();
				}
			}

			return await GetRoom(roomData.RoomId);
		}
	}
}