using Microsoft.EntityFrameworkCore;
using RadicadeServer.API.Notifications;
using RadicadeServer.API.Storefront;
using RadicadeServer.DB;
using RadicadeServer.Extensions;
using RadicadeServer.RecNet.Enums.Messages;
using RadicadeServer.RecNet.Enums.Store;
using RadicadeServer.RecNet.Notifications;
using RadicadeServer.RecNet.Progression;

namespace RadicadeServer.Utils
{
    public static class RoomProgressionService
    {
        public const int XpPerInterval = 10;

        public static readonly TimeSpan Interval = TimeSpan.FromMinutes(5);

        public const int RoomXpCap = 60;

        public const int DailyXpCap = 150;

        public static readonly TimeSpan DailyCapCooldown = TimeSpan.FromHours(24);

        public const string ProgressionLevelUpdateNotificationId = "PlayerProgressionLevelUpdate";

        public static async Task<int> AwardRoomXpAsync(RecDBContext db, long playerId, long roomId, bool isPublicRoom)
        {
            if (playerId <= 0 || roomId <= 0 || !isPublicRoom) return 0;

            var progression = await db.Progression.FirstOrDefaultAsync(x => x.PlayerId == playerId);
            if (progression == null)
            {
                progression = new ProgressionData { PlayerId = playerId };
                await db.Progression.AddAsync(progression);
            }

            var json = progression.GetProgressionJson() ?? new ProgressionJson();
            var now = DateTime.UtcNow;

            if (json.XpEarnedTodayDate != now.Date)
            {
                json.XpEarnedToday = 0;
                json.XpEarnedTodayDate = now.Date;
                json.XpDailyCapReachedAt = null;
            }

            if (json.XpEarnedToday >= DailyXpCap)
            {
                if (json.XpDailyCapReachedAt is { } reachedAt && now >= reachedAt.Add(DailyCapCooldown))
                {
                    json.XpEarnedToday = 0;
                    json.XpEarnedTodayDate = now.Date;
                    json.XpDailyCapReachedAt = null;
                }
                else
                {
                    json.XpDailyCapReachedAt ??= now;
                    progression.Progress = json.ToJson();
                    await db.SaveChangesAsync();
                    return 0;
                }
            }

            if (json.RoomXpRoomId != roomId)
            {
                json.RoomXpRoomId = roomId;
                json.RoomXpEarned = 0;
                json.RoomXpLastGrantAt = now;
                progression.Progress = json.ToJson();
                await db.SaveChangesAsync();
                return 0;
            }

            if (json.RoomXpEarned >= RoomXpCap)
            {
                progression.Progress = json.ToJson();
                await db.SaveChangesAsync();
                return 0;
            }

            json.RoomXpLastGrantAt ??= now;

            int granted = 0;
            while (now - json.RoomXpLastGrantAt.Value >= Interval)
            {
                int roomHeadroom = RoomXpCap - (json.RoomXpEarned + granted);
                int dailyHeadroom = DailyXpCap - (json.XpEarnedToday + granted);
                int instalment = Math.Min(XpPerInterval, Math.Min(roomHeadroom, dailyHeadroom));
                if (instalment <= 0) break;

                granted += instalment;
                json.RoomXpLastGrantAt = json.RoomXpLastGrantAt.Value.Add(Interval);
            }

            if (granted == 0 && now - json.RoomXpLastGrantAt.Value >= Interval)
                json.RoomXpLastGrantAt = now;

            if (granted == 0)
            {
                progression.Progress = json.ToJson();
                await db.SaveChangesAsync();
                return 0;
            }

            int applied = (int)Math.Min(granted, int.MaxValue);

            json.RoomXpEarned += applied;
            json.XpEarnedToday += applied;
            json.XpEarnedTodayDate = now.Date;
            json.LastXpEarnedAt = now;
            if (json.XpEarnedToday >= DailyXpCap)
                json.XpDailyCapReachedAt ??= now;

            int oldLevel = progression.Level;
            progression.XP = (int)Math.Min(progression.XP + applied, int.MaxValue);
            progression.Progress = json.ToJson();
            await db.SaveChangesAsync();

            await StorefrontShared.SendXpBalanceUpdateAsync(playerId,
                LevelUpGiftService.XpIntoCurrentLevel(progression), applied,
                StorefrontBalanceAddTypes.DirectBalanceWithMultiplier);

            int computedLevel = LevelUpGiftService.ComputeLevel(LevelUpGiftService.ParseMap(), progression.XP);
            if (computedLevel > progression.Level) progression.Level = computedLevel;

            await LevelUpGiftService.DeliverLevelUpGiftsAsync(db, playerId,
                recomputeFromXp: true, fromLevel: oldLevel, notify: true);

            await SendProgressionLevelUpdateAsync(db, playerId, progression);

            if (progression.Level > oldLevel)
            {
                await PushProgressionUpdateAsync(db, playerId);
            }

            return applied;
        }

        public static async Task SendProgressionLevelUpdateAsync(RecDBContext db, long playerId,
            ProgressionData? progression = null)
        {
            if (playerId <= 0) return;

            try
            {
                progression ??= await db.Progression.AsNoTracking()
                    .FirstOrDefaultAsync(x => x.PlayerId == playerId);
                if (progression == null) return;

                var notification = new Notification
                {
                    Id = ProgressionLevelUpdateNotificationId,
                    Msg = new PlayerProgressionLevelUpdateNotification(progression)
                };

                await Notify.SendNotify(playerId, notification);

                await Notify.SendToSubscribers(playerId, notification);
            }
            catch (Exception)
            {
            }
        }

        public static async Task PushProgressionUpdateAsync(RecDBContext db, long playerId)
        {
            await SendProgressionLevelUpdateAsync(db, playerId);

            try
            {
                var profile = await db.Profiles.AsNoTracking().FirstOrDefaultAsync(x => x.accountId == playerId);
                if (profile == null) return;

                var plrData = await db.Players.AsNoTracking().FirstOrDefaultAsync(x => x.AccountId == playerId);

                var progression = await db.Progression.AsNoTracking().FirstOrDefaultAsync(x => x.PlayerId == playerId);
                if (progression != null)
                    await StorefrontShared.SendXpBalanceUpdateAsync(playerId,
                        LevelUpGiftService.XpIntoCurrentLevel(progression), 0,
                        StorefrontBalanceAddTypes.LevelUp);

                await Notify.SendNotify(playerId, new Notification
                {
                    Id = "AccountUpdate",
                    Msg = profile
                });

                await Notify.UpdateSubscriptions(playerId, Notifs.SubscriptionUpdateProfile, profile);

                if (plrData != null)
                    await Notify.SendNotify(playerId, new Notification
                    {
                        Id = "SelfAccountUpdate",
                        Msg = PlayerUtils.BuildSelfAccount(profile, plrData)
                    });
            }
            catch (Exception)
            {
            }
        }
    }
}