using Terraria;
using Terraria.ID;
using TShockAPI;
using TShockAPI.Hooks;
using TerrariaApi.Server;
using TerrariaHealingPlugin.Mappings;
using TerrariaHealingPlugin.Models;

namespace TerrariaHealingPlugin;

[ApiVersion(2, 1)]
public class HealingPlugin : TerrariaPlugin
{
    public override string Author => "Sneefaria Maintainers";
    public override string Name => "HealingPlugin";
    public override string Description => "A healing plugin, duh";
    public override Version Version => new Version(1, 0, 0);

    private DateTime _lastHealCheck = DateTime.UtcNow;
    private DateTime _lastBuffCheck = DateTime.UtcNow;
    private List<ServerPlayer> _players = new List<ServerPlayer>();

    private HealingMappings _healingItemMappings = new HealingMappings();
    private EquipMappings _equipMappings = new EquipMappings();

    public HealingPlugin(Main game) : base(game) { }

    public override void Initialize()
    {
        TShock.Log.Info($"Initializing {Name} v{Version} by {Author}");
        ServerApi.Hooks.ServerJoin.Register(this, OnServerJoin);
        ServerApi.Hooks.GameUpdate.Register(this, OnUpdate);
        ServerApi.Hooks.NetSendData.Register(this, OnSendNetData);
        ServerApi.Hooks.NetGetData.Register(this, OnGetNetData);
        GetDataHandlers.PlayerSlot.Register(OnPlayerSlot);
        // GetDataHandlers.PlayerHP.Register(OnPlayerHPChange);
        GetDataHandlers.PlayerBuff.Register(OnPlayerBuff);
        PlayerHooks.PlayerPostLogin += OnPlayerPostLogin;
    }

    protected override void Dispose(bool disposing)
    {
        if (disposing)
        {
            ServerApi.Hooks.ServerJoin.Deregister(this, OnServerJoin);
            // ServerApi.Hooks.GameUpdate.Deregister(this, OnUpdate);
            ServerApi.Hooks.NetSendData.Deregister(this, OnSendNetData);
            ServerApi.Hooks.NetGetData.Deregister(this, OnGetNetData);
            PlayerHooks.PlayerPostLogin -= OnPlayerPostLogin;
        }
        base.Dispose(disposing);
    }

    private void OnPlayerPostLogin(PlayerPostLoginEventArgs e)
    {
        ApplyRegenerationBuff(e.Player);
    }

    // FIXME: not at all complete, needs some work
    private void OnPlayerBuff(object sender, GetDataHandlers.PlayerBuffEventArgs args)
    {
        // Console.WriteLine($"Player buff arguments: {args}");
        TSPlayer player = args.Player;
        int buffType = args.Type;
        Console.WriteLine($"Buff type: {buffType}");
        bool isEquippableBuff = _equipMappings.mappings.ContainsKey(buffType);
        bool isHealingItemBuff = _healingItemMappings.mappings.ContainsKey(buffType);
        Console.WriteLine($"Player: {player.Name}, Buff Type: {buffType}, Is Equippable Buff: {isEquippableBuff}");
        if (isEquippableBuff)
        {
            var multiplier = _equipMappings.GetHealingMultiplier(buffType);
            player.SendSuccessMessage($"Equippable buff detected! Applying x{multiplier} multiplier to healing effects.");
            args.Handled = true;
        }
    }

    private void OnGetNetData(GetDataEventArgs args)
    {
        // nothing here, yet ;)
    }

    private void OnPlayerHPChange(object sender, GetDataHandlers.PlayerHPEventArgs args)
    {
        TSPlayer player = args.Player;
        int previousHP = player.TPlayer.statLife;
        int newHP = args.Current;
        short healingAmount = (short)(newHP - previousHP);
        bool isHealingItem = IsHealingValueValid(healingAmount);

        if (healingAmount > 0 && isHealingItem)
        {
            args.Handled = true;
        }
    }

    private void OnPlayerSlot(object sender, GetDataHandlers.PlayerSlotEventArgs args)
    {
        TSPlayer player = args.Player;
        short slot = args.Slot;
        short newStack = args.Stack;
        short itemType = args.Type;

        bool isHealingItem = IsHealingItem(itemType);
        bool isItemConsumed = IsItemBeingConsumed(player, slot, newStack);

        if (isHealingItem && isItemConsumed)
        {
            var multiplier = _healingItemMappings.GetHealingMultiplier(itemType);
            var baseHeal = GetBaseHealAmount(itemType);
            var enhancedHeal = (int)(baseHeal * multiplier);
            var totalHealing = enhancedHeal + baseHeal;

            player.Heal(enhancedHeal);
            player.SendSuccessMessage($"Enhanced healing! Restored {enhancedHeal} HP (x{multiplier} multiplier)");
        }

        args.Handled = true;
    }

    private bool IsHealingItem(int itemType)
    {
        return _healingItemMappings.mappings.ContainsKey(itemType);
    }

    private bool IsHealingValueValid(short healAmount)
    {
        return _healingItemMappings.mappings.ContainsValue(healAmount);
    }

    private int GetBaseHealAmount(int itemType)
    {
        return _healingItemMappings.mappings.TryGetValue(itemType, out var healAmount) ? healAmount : 0;
    }

    private bool IsItemBeingConsumed(TSPlayer player, int slot, short newStack)
    {
        Terraria.Item item = player.TPlayer.inventory[slot];
        bool isMouse = slot != 58; // is slot 58 the mouse?
        bool isNewStackLessThanOld = item.stack > newStack;
        bool isUseAction = player.TPlayer.ConsumeItem(item.netID);

        Console.WriteLine($"Is the slot the mouse slot?: {!isMouse}");
        Console.WriteLine($"Is the new stack of items less than the item stack?: {isNewStackLessThanOld}");
        Console.WriteLine($"Is the action consuming an item?: {isUseAction}");
        // return isMouse && isNewStackLessThanOld && isUseAction;

        if (isNewStackLessThanOld && isUseAction)
        {
            return true;
        }

        if (slot < 58 && isNewStackLessThanOld)
        {
            return true;
        }

        return false;
    }

    private void OnSendNetData(SendDataEventArgs args)
    {
        // empty, on purpose :D
    }

    private void OnUpdate(EventArgs args)
    {
        if ((DateTime.UtcNow - _lastBuffCheck).TotalSeconds >= 30)
        {
            foreach (TSPlayer player in TShock.Players)
            {
                if (player?.Active == true)
                {
                    ApplyRegenerationBuff(player);
                }
            }

            _lastBuffCheck = DateTime.UtcNow;
        }
    }

    // TODO: method might be used for later
    // private void ApplyRegenerationToAllPlayers()
    // {
    //     foreach (TSPlayer player in TShock.Players)
    //     {
    //         if (player?.Active == true && player.ConnectionAlive)
    //         {
    //             ApplyRegenerationBuff(player);
    //         }
    //     }
    // }

    private void ApplyRegenerationBuff(TSPlayer player)
    {
        if (player?.Active == true && player.ConnectionAlive)
        {
            player.SetBuff(BuffID.Regeneration, 3600, bypass: true);
        }
    }

    private void OnServerJoin(JoinEventArgs args)
    {
        var player = TShock.Players[args.Who];
        if (player != null)
        {
            _players.Add(new ServerPlayer(player));
            TShock.Log.Info($"Player {player.Name} joined with IP: {player.IP}");
            player.SendSuccessMessage($"Welcome {player.Name} to Sneefaria! Enjoy the regen buff!", Colors.RarityOrange);
        }
    }
}