using Yuanshen.Common.Data.Excel;
using Yuanshen.Gameserver.Database;

namespace Yuanshen.Gameserver.Game;

internal sealed class Player
{
    public uint Uid { get; private set; } = 1;
    public const uint PeerId = 1;
    public const uint TeamEntityId = 0x09000001;
    private const uint StarterReliquaryRank = 5;
    public const uint MpLevelEntityId = 0x0B000001;

    public static readonly uint[] Flycloaks = { 140001, 140002, 140003, 140004, 140005 };

    public string Nickname { get; } = "Traveler";

    public List<GameAvatar> Avatars { get; } = new();
    public List<GameWeapon> Weapons { get; } = new();
    public List<GameReliquary> Reliquaries { get; } = new();
    public List<GameMonster> Monsters { get; } = new();
    public List<GameGadget> Gadgets { get; } = new();
    public HashSet<uint> KilledNodeIds { get; } = new();
    public HashSet<uint> OpenedGadgetIds { get; } = new();
    public Dictionary<uint, uint> Materials { get; } = new();

    public bool IsInitialized { get; private set; }

    public uint CurrentTeamId { get; set; } = 1;
    public List<ulong> TeamAvatarGuids { get; } = new();
    public ulong CurrentAvatarGuid { get; set; }

    private readonly ExcelTableCollection _excel;
    private uint _guidSeq;
    private uint _defaultGuidCeiling;
    private uint _avatarEntitySeq;
    private uint _weaponEntitySeq;
    private uint _monsterEntitySeq;
    private uint _gadgetEntitySeq;

    public Player(ExcelTableCollection excel) => _excel = excel;

    public void AssignUid(uint uid) => Uid = uid;

    public const uint StartingHcoin = 1_600_000;
    public const uint StartingScoin = 9_999_999;

    public const uint CurrentSpawnDataVersion = 2;

    public ulong NextGuid() => ((ulong)Uid << 32) | ++_guidSeq;

    public GameAvatar? ActiveAvatar => FindAvatar(CurrentAvatarGuid);
    public GameAvatar? FindAvatar(ulong guid) => Avatars.FirstOrDefault(avatar => avatar.Guid == guid);
    public GameWeapon? FindWeapon(ulong guid) => Weapons.FirstOrDefault(weapon => weapon.Guid == guid);
    public GameReliquary? FindReliquary(ulong guid) => Reliquaries.FirstOrDefault(item => item.Guid == guid);

    public GameReliquary? FindReliquaryByItemId(uint itemId) => Reliquaries.FirstOrDefault(item => item.ItemId == itemId);

    public IEnumerable<GameAvatar> TeamAvatars
        => TeamAvatarGuids.Select(FindAvatar).OfType<GameAvatar>();

    public void InitDefault()
    {
        if (IsInitialized)
            return;

        List<AvatarSkillDepotExcel> depots = _excel.GetTable(ExcelType.AvatarSkillDepot)
            .Items.OfType<AvatarSkillDepotExcel>().ToList();
        List<AvatarAbilitiesExcel> abilities = _excel.GetTable(ExcelType.AvatarAbilities)
            .Items.OfType<AvatarAbilitiesExcel>().ToList();

        foreach (AvatarExcel excel in _excel.GetTable(ExcelType.Avatar).Items.OfType<AvatarExcel>())
        {
            AvatarAbilitiesExcel? avatarAbilities = abilities.FirstOrDefault(a => a.Id == excel.Id);
            if (avatarAbilities is null)
                continue;

            AvatarSkillDepotExcel? depot = depots.FirstOrDefault(d => d.Id == excel.SkillDepotId);
            GameAvatar avatar = new(excel, NextGuid(), 0x01000000 + ++_avatarEntitySeq, 0x06000000 + ++_weaponEntitySeq, depot,
                avatarAbilities);
            GameWeapon weapon = CreateWeapon(excel.InitialWeapon);
            avatar.WeaponGuid = weapon.Guid;
            avatar.OwnerUid = Uid;
            Avatars.Add(avatar);
        }

        foreach (WeaponExcel excel in _excel.GetTable(ExcelType.Weapon).Items.OfType<WeaponExcel>())
            CreateWeapon(excel.Id);

        CreateReliquaries();

        CurrentAvatarGuid = Avatars[0].Guid;
        TeamAvatarGuids.Add(Avatars[0].Guid);
        _defaultGuidCeiling = _guidSeq;
        IsInitialized = true;
    }

    public GameAvatar? GrantAvatar(uint avatarId)
    {
        if (Avatars.Any(existing => existing.AvatarId == avatarId))
            return null;

        AvatarExcel? excel = _excel.GetTable(ExcelType.Avatar).Items.OfType<AvatarExcel>()
            .FirstOrDefault(candidate => candidate.Id == avatarId);
        AvatarAbilitiesExcel? abilities = _excel.GetTable(ExcelType.AvatarAbilities).Items.OfType<AvatarAbilitiesExcel>()
            .FirstOrDefault(candidate => candidate.Id == avatarId);

        if (excel is null)
            return null;

        AvatarSkillDepotExcel? depot = _excel.GetTable(ExcelType.AvatarSkillDepot).Items.OfType<AvatarSkillDepotExcel>()
            .FirstOrDefault(candidate => candidate.Id == excel.SkillDepotId);

        GameAvatar avatar = new(excel, NextGuid(), 0x01000000 + ++_avatarEntitySeq, 0x06000000 + ++_weaponEntitySeq, depot, abilities);
        GameWeapon weapon = CreateWeapon(excel.InitialWeapon);
        avatar.WeaponGuid = weapon.Guid;
        avatar.OwnerUid = Uid;
        Avatars.Add(avatar);

        return avatar;
    }

    public bool HasAvatarData(uint avatarId)
        => _excel.GetTable(ExcelType.Avatar).Items.OfType<AvatarExcel>().Any(candidate => candidate.Id == avatarId);

    public bool HasAbilities(uint avatarId)
        => _excel.GetTable(ExcelType.AvatarAbilities).Items.OfType<AvatarAbilitiesExcel>().Any(candidate => candidate.Id == avatarId);

    public void ResetTeam()
    {
        TeamAvatarGuids.Clear();
        TeamAvatarGuids.Add(Avatars[0].Guid);
        CurrentAvatarGuid = Avatars[0].Guid;
    }

    public ulong MaterialGuid(uint itemId) => ((ulong)Uid << 32) | (0x80000000u | itemId);

    public void MarkNodeKilled(uint nodeId) => KilledNodeIds.Add(nodeId);

    public Dictionary<uint, uint> GachaPity { get; } = new();
    public Dictionary<uint, uint> GachaGuarantee { get; } = new();
    public List<GachaLogEntry> GachaLog { get; } = new();
    public Dictionary<uint, uint> BoughtGoods { get; } = new();
    public Dictionary<uint, uint> ClientGadgets { get; } = new();

    public uint Hcoin { get; set; } = StartingHcoin;
    public uint Scoin { get; set; } = StartingScoin;

    public Yuanshen.Protocol.PlayerPropNotify BuildCurrencyProps()
    {
        Yuanshen.Protocol.PlayerPropNotify notify = new();
        notify.PropMap.Add(10015u, new Yuanshen.Protocol.PropValue { Type = 10015, Ival = Hcoin, Val = Hcoin });
        notify.PropMap.Add(10016u, new Yuanshen.Protocol.PropValue { Type = 10016, Ival = Scoin, Val = Scoin });
        return notify;
    }

    public void TakeMaterial(uint itemId, uint count)
    {
        uint left = Materials.GetValueOrDefault(itemId);
        Materials[itemId] = left > count ? left - count : 0;
    }

    public void GiveMaterial(uint itemId, uint count)
        => Materials[itemId] = Materials.GetValueOrDefault(itemId) + count;

    public GameMonster SpawnMonster(uint monsterId, Yuanshen.Protocol.Vector pos, uint level, float maxHp, float attack, float defense, uint nodeId = 0, uint configId = 0, uint groupId = 0)
    {
        GameMonster monster = new(monsterId, 0x02000000 + ++_monsterEntitySeq, pos, level, maxHp, attack, defense)
        {
            NodeId = nodeId,
            ConfigId = configId,
            GroupId = groupId
        };
        Monsters.Add(monster);
        return monster;
    }

    public GameGadget SpawnGadget(GadgetNode node)
    {
        GameGadget gadget = new(node, 0x04000000 + ++_gadgetEntitySeq);
        Gadgets.Add(gadget);
        return gadget;
    }

    public PlayerRecord ToRecord(Yuanshen.Protocol.Vector pos) => new()
    {
        Uid = Uid,
        Nickname = Nickname,
        CurrentTeamId = CurrentTeamId,
        CurrentAvatarGuid = CurrentAvatarGuid,
        TeamAvatarGuids = TeamAvatarGuids.ToList(),
        TeamAvatarIds = TeamAvatars.Select(avatar => avatar.AvatarId).ToList(),
        CurrentAvatarId = ActiveAvatar?.AvatarId ?? 0,
        EquippedWeapons = Avatars
            .GroupBy(a => a.AvatarId)
            .ToDictionary(group => group.Key, group => FindWeapon(group.First().WeaponGuid)?.ItemId ?? 0UL),
        EquippedReliquaries = Avatars
            .Where(a => a.ReliquaryGuids.Count != 0)
            .GroupBy(a => a.AvatarId)
            .ToDictionary(group => group.Key, group => group.First().ReliquaryGuids
                .ToDictionary(slot => slot.Key, slot => (ulong)(FindReliquary(slot.Value)?.ItemId ?? 0))),
        AvatarProgress = Avatars
            .GroupBy(a => a.AvatarId)
            .ToDictionary(group => group.Key, group => BuildProgress(group.First())),
        Materials = new Dictionary<uint, uint>(Materials),
        KilledNodes = KilledNodeIds.ToList(),
        OpenedGadgets = OpenedGadgetIds.ToList(),
        DroppedWeapons = Weapons.Where(IsDropped).Select(weapon => new DroppedWeapon
        {
            ItemId = weapon.ItemId,
            Level = weapon.Level,
            PromoteLevel = weapon.PromoteLevel,
            Refinement = weapon.Refinement
        }).ToList(),
        DroppedReliquaries = Reliquaries.Where(IsDropped).Select(reliquary => new DroppedReliquary
        {
            ItemId = reliquary.ItemId,
            EquipType = reliquary.EquipType,
            MainPropId = reliquary.MainPropId,
            Level = reliquary.Level,
            PromoteLevel = reliquary.PromoteLevel,
            AppendPropIds = reliquary.AppendPropIds.ToList()
        }).ToList(),
        SpawnDataVersion = CurrentSpawnDataVersion,
        GachaPity = GachaPity.ToDictionary(pair => pair.Key, pair => pair.Value),
        GachaGuarantee = GachaGuarantee.ToDictionary(pair => pair.Key, pair => pair.Value),
        GachaLog = GachaLog.ToList(),
        BoughtGoods = BoughtGoods.ToDictionary(pair => pair.Key, pair => pair.Value),
        Hcoin = Hcoin,
        Scoin = Scoin,
        PosX = pos.X,
        PosY = pos.Y,
        PosZ = pos.Z
    };

    public void ApplyRecord(PlayerRecord record)
    {
        CurrentTeamId = record.CurrentTeamId;

        RestoreDropped(record);

        Hcoin = record.Hcoin != 0 || record.Scoin != 0 ? record.Hcoin : StartingHcoin;
        Scoin = record.Hcoin != 0 || record.Scoin != 0 ? record.Scoin : StartingScoin;

        BoughtGoods.Clear();
        foreach ((uint goodsId, uint bought) in record.BoughtGoods)
            BoughtGoods[goodsId] = bought;

        GachaPity.Clear();
        foreach ((uint gachaType, uint counter) in record.GachaPity)
            GachaPity[gachaType] = counter;

        GachaGuarantee.Clear();
        foreach ((uint gachaType, uint flag) in record.GachaGuarantee)
            GachaGuarantee[gachaType] = flag;

        GachaLog.Clear();
        GachaLog.AddRange(record.GachaLog);

        KilledNodeIds.Clear();
        foreach (uint nodeId in record.SpawnDataVersion == CurrentSpawnDataVersion ? record.KilledNodes : new List<uint>())
            KilledNodeIds.Add(nodeId);

        OpenedGadgetIds.Clear();
        foreach (uint gadgetNodeId in record.OpenedGadgets)
            OpenedGadgetIds.Add(gadgetNodeId);

        HashSet<ulong> takenWeapons = new();
        foreach ((uint avatarId, ulong itemId) in record.EquippedWeapons)
        {
            GameAvatar? avatar = Avatars.FirstOrDefault(a => a.AvatarId == avatarId);
            GameWeapon? weapon = Weapons.FirstOrDefault(w => w.ItemId == itemId && !takenWeapons.Contains(w.Guid));
            if (avatar is null || weapon is null)
                continue;

            avatar.WeaponGuid = weapon.Guid;
            takenWeapons.Add(weapon.Guid);
        }

        HashSet<ulong> takenReliquaries = new();
        foreach ((uint avatarId, Dictionary<uint, ulong> slots) in record.EquippedReliquaries)
        {
            GameAvatar? avatar = Avatars.FirstOrDefault(a => a.AvatarId == avatarId);
            if (avatar is null)
                continue;

            foreach ((uint slot, ulong itemId) in slots)
            {
                GameReliquary? reliquary = Reliquaries
                    .FirstOrDefault(r => r.ItemId == itemId && !takenReliquaries.Contains(r.Guid));
                if (reliquary is null)
                    continue;

                avatar.ReliquaryGuids[slot] = reliquary.Guid;
                takenReliquaries.Add(reliquary.Guid);
            }
        }

        foreach ((uint avatarId, AvatarProgress progress) in record.AvatarProgress)
        {
            GameAvatar? avatar = Avatars.FirstOrDefault(a => a.AvatarId == avatarId);
            if (avatar is null)
                continue;

            avatar.Level = progress.Level;
            avatar.PromoteLevel = progress.PromoteLevel;
            avatar.TalentLevel = progress.TalentLevel;
            avatar.Constellation = progress.Constellation;

            GameWeapon? weapon = FindWeapon(avatar.WeaponGuid);
            if (weapon is not null)
            {
                weapon.Level = progress.WeaponLevel;
                weapon.PromoteLevel = progress.WeaponPromote;
                weapon.Refinement = progress.WeaponRefinement;
            }
        }

        Materials.Clear();
        foreach ((uint itemId, uint count) in record.Materials)
            Materials[itemId] = count;

        List<ulong> team = record.TeamAvatarIds
            .Select(avatarId => Avatars.FirstOrDefault(a => a.AvatarId == avatarId)?.Guid ?? 0)
            .Where(guid => guid != 0)
            .ToList();

        if (team.Count != 0)
        {
            TeamAvatarGuids.Clear();
            TeamAvatarGuids.AddRange(team);

            ulong active = Avatars.FirstOrDefault(a => a.AvatarId == record.CurrentAvatarId)?.Guid ?? 0;
            CurrentAvatarGuid = team.Contains(active) ? active : team[0];
        }
    }

    private AvatarProgress BuildProgress(GameAvatar avatar)
    {
        GameWeapon? weapon = FindWeapon(avatar.WeaponGuid);
        return new AvatarProgress
        {
            Level = avatar.Level,
            PromoteLevel = avatar.PromoteLevel,
            TalentLevel = avatar.TalentLevel,
            Constellation = avatar.Constellation,
            WeaponLevel = weapon?.Level ?? 90,
            WeaponPromote = weapon?.PromoteLevel ?? 6,
            WeaponRefinement = weapon?.Refinement ?? 0
        };
    }

    private bool IsDropped(GameWeapon weapon) => (uint)(weapon.Guid & 0xFFFFFFFF) > _defaultGuidCeiling;

    private bool IsDropped(GameReliquary reliquary) => (uint)(reliquary.Guid & 0xFFFFFFFF) > _defaultGuidCeiling;

    private void RestoreDropped(PlayerRecord record)
    {
        foreach (DroppedWeapon saved in record.DroppedWeapons)
        {
            GameWeapon weapon = CreateWeapon(saved.ItemId);
            weapon.Level = saved.Level;
            weapon.PromoteLevel = saved.PromoteLevel;
            weapon.Refinement = saved.Refinement;
        }

        foreach (DroppedReliquary saved in record.DroppedReliquaries)
        {
            GameReliquary reliquary = new(saved.ItemId, NextGuid(), saved.EquipType, saved.MainPropId)
            {
                Level = saved.Level,
                PromoteLevel = saved.PromoteLevel
            };

            foreach (uint appendPropId in saved.AppendPropIds)
                reliquary.AppendPropIds.Add(appendPropId);

            Reliquaries.Add(reliquary);
        }
    }

    public GameWeapon CreateWeapon(uint itemId)
    {
        GameWeapon weapon = new(itemId, NextGuid());
        Weapons.Add(weapon);
        return weapon;
    }

    public GameReliquary? CreateReliquary(uint itemId, Random random)
    {
        ReliquaryExcel? excel = _excel.GetTable(ExcelType.Reliquary).Items.OfType<ReliquaryExcel>()
            .FirstOrDefault(candidate => candidate.Id == itemId);

        if (excel is null)
            return null;

        List<ReliquaryMainPropExcel> pool = _excel.GetTable(ExcelType.ReliquaryMainProp)
            .Items.OfType<ReliquaryMainPropExcel>()
            .Where(candidate => candidate.PropDepotId == excel.MainPropDepotId)
            .ToList();

        if (pool.Count == 0)
            return null;

        ReliquaryMainPropExcel main = pool[random.Next(pool.Count)];
        GameReliquary reliquary = new(excel.Id, NextGuid(), EquipTypeId(excel.EquipType), main.Id)
        {
            Level = 1,
            PromoteLevel = 0
        };

        List<IGrouping<uint, ReliquaryAffixExcel>> groups = _excel.GetTable(ExcelType.ReliquaryAffix)
            .Items.OfType<ReliquaryAffixExcel>()
            .Where(candidate => candidate.DepotId == excel.AppendPropDepotId && candidate.PropType != main.PropType)
            .GroupBy(candidate => candidate.GroupId)
            .ToList();

        int wanted = (int)Math.Clamp(excel.AppendPropNum, 1u, (uint)groups.Count);

        for (int taken = 0; taken < wanted && groups.Count != 0; taken++)
        {
            int index = random.Next(groups.Count);
            List<ReliquaryAffixExcel> tiers = groups[index].ToList();
            groups.RemoveAt(index);

            reliquary.AppendPropIds.Add(tiers[random.Next(tiers.Count)].Id);
        }

        Reliquaries.Add(reliquary);
        return reliquary;
    }

    private void CreateReliquaries()
    {
        List<ReliquaryMainPropExcel> mainProps = _excel.GetTable(ExcelType.ReliquaryMainProp)
            .Items.OfType<ReliquaryMainPropExcel>().ToList();
        List<ReliquaryAffixExcel> affixes = _excel.GetTable(ExcelType.ReliquaryAffix)
            .Items.OfType<ReliquaryAffixExcel>().ToList();

        foreach (ReliquaryExcel excel in _excel.GetTable(ExcelType.Reliquary).Items.OfType<ReliquaryExcel>()
                     .Where(candidate => candidate.RankLevel == StarterReliquaryRank))
        {
            ReliquaryMainPropExcel? main = mainProps.FirstOrDefault(p => p.PropDepotId == excel.MainPropDepotId);
            if (main is null)
                continue;

            GameReliquary reliquary = new(excel.Id, NextGuid(), EquipTypeId(excel.EquipType), main.Id);

            foreach (ReliquaryAffixExcel affix in affixes.Where(a => a.DepotId == excel.AppendPropDepotId).Take(4))
                reliquary.AppendPropIds.Add(affix.Id);

            Reliquaries.Add(reliquary);
        }
    }

    public static uint EquipTypeId(string equipType) => equipType switch
    {
        "EQUIP_BRACER" => 1,
        "EQUIP_NECKLACE" => 2,
        "EQUIP_SHOES" => 3,
        "EQUIP_RING" => 4,
        "EQUIP_DRESS" => 5,
        _ => 0
    };
}