using System;
using System.Runtime.InteropServices;
using Dalamud.Hooking;
using Dalamud.Plugin.Services;
using FFXIVClientStructs.FFXIV.Client.Game;
using FFXIVClientStructs.FFXIV.Client.Game.Character;
using FFXIVClientStructs.FFXIV.Common.Math;
using Microsoft.Extensions.Logging;
using Questionable.Data;

namespace Questionable.Controller;

internal sealed class InterruptHandler : IDisposable
{
	private unsafe delegate void ProcessActionEffect(uint sourceId, Character* sourceCharacter, Vector3* pos, EffectHeader* effectHeader, EffectEntry* effectArray, ulong* effectTail);

	private static class Signatures
	{
		internal const string ActionEffect = "40 ?? 56 57 41 ?? 41 ?? 41 ?? 48 ?? ?? ?? ?? ?? ?? ?? 48";
	}

	[StructLayout(LayoutKind.Explicit)]
	private struct EffectEntry
	{
		[FieldOffset(0)]
		public EActionEffectType Type;

		[FieldOffset(1)]
		public byte Param0;

		[FieldOffset(2)]
		public byte Param1;

		[FieldOffset(3)]
		public byte Param2;

		[FieldOffset(4)]
		public byte Mult;

		[FieldOffset(5)]
		public byte Flags;

		[FieldOffset(6)]
		public ushort Value;

		public byte AttackType => (byte)(Param1 & 0xF);

		public override string ToString()
		{
			return $"Type: {Type}, p0: {Param0:D3}, p1: {Param1:D3}, p2: {Param2:D3} 0x{Param2:X2} '{Convert.ToString(Param2, 2).PadLeft(8, '0')}', mult: {Mult:D3}, flags: {Flags:D3} | {Convert.ToString(Flags, 2).PadLeft(8, '0')}, value: {Value:D6} ATTACK TYPE: {AttackType}";
		}
	}

	[StructLayout(LayoutKind.Explicit)]
	private struct EffectHeader
	{
		[FieldOffset(0)]
		public ulong AnimationTargetId;

		[FieldOffset(8)]
		public uint ActionID;

		[FieldOffset(12)]
		public uint GlobalEffectCounter;

		[FieldOffset(16)]
		public float AnimationLockTime;

		[FieldOffset(20)]
		public uint SomeTargetID;

		[FieldOffset(24)]
		public ushort SourceSequence;

		[FieldOffset(26)]
		public ushort Rotation;

		[FieldOffset(28)]
		public ushort AnimationId;

		[FieldOffset(30)]
		public byte Variation;

		[FieldOffset(31)]
		public ActionType ActionType;

		[FieldOffset(33)]
		public byte TargetCount;
	}

	private enum EActionEffectType : byte
	{
		None = 0,
		Miss = 1,
		FullResist = 2,
		Damage = 3,
		Heal = 4,
		BlockedDamage = 5,
		ParriedDamage = 6,
		Invulnerable = 7,
		NoEffectText = 8,
		Unknown0 = 9,
		MpLoss = 10,
		MpGain = 11,
		TpLoss = 12,
		TpGain = 13,
		ApplyStatusEffectTarget = 14,
		ApplyStatusEffectSource = 15,
		RecoveredFromStatusEffect = 16,
		LoseStatusEffectTarget = 17,
		LoseStatusEffectSource = 18,
		StatusNoEffect = 20,
		ThreatPosition = 24,
		EnmityAmountUp = 25,
		EnmityAmountDown = 26,
		StartActionCombo = 27,
		ComboSucceed = 28,
		Retaliation = 29,
		Knockback = 32,
		Attract1 = 33,
		Attract2 = 34,
		Mount = 40,
		FullResistStatus = 52,
		FullResistStatus2 = 55,
		VFX = 59,
		Gauge = 60,
		JobGauge = 61,
		SetModelState = 72,
		SetHP = 73,
		PartialInvulnerable = 74,
		Interrupt = 75
	}

	private readonly Hook<ProcessActionEffect> _processActionEffectHook;

	private readonly IClientState _clientState;

	private readonly TerritoryData _territoryData;

	private readonly ILogger<InterruptHandler> _logger;

	public event EventHandler? Interrupted;

	public unsafe InterruptHandler(IGameInteropProvider gameInteropProvider, IClientState clientState, TerritoryData territoryData, ILogger<InterruptHandler> logger)
	{
		_clientState = clientState;
		_territoryData = territoryData;
		_logger = logger;
		_processActionEffectHook = gameInteropProvider.HookFromSignature<ProcessActionEffect>("40 ?? 56 57 41 ?? 41 ?? 41 ?? 48 ?? ?? ?? ?? ?? ?? ?? 48", HandleProcessActionEffect);
		_processActionEffectHook.Enable();
	}

	private unsafe void HandleProcessActionEffect(uint sourceId, Character* sourceCharacter, Vector3* pos, EffectHeader* effectHeader, EffectEntry* effectArray, ulong* effectTail)
	{
		try
		{
			if (_territoryData.IsDutyInstance(_clientState.TerritoryType))
			{
				return;
			}
			for (int i = 0; i < effectHeader->TargetCount; i++)
			{
				int num = (int)(effectTail[i] & 0xFFFFFFFFu);
				EffectEntry* ptr = effectArray + 8 * i;
				bool flag = (uint)num == _clientState.LocalPlayer?.GameObjectId;
				if (flag)
				{
					EActionEffectType type = ptr->Type;
					bool flag2 = ((type == EActionEffectType.Damage || type - 5 <= EActionEffectType.Miss) ? true : false);
					flag = flag2;
				}
				if (flag)
				{
					_logger.LogTrace("Damage action effect on self, from {SourceId} ({EffectType})", sourceId, ptr->Type);
					this.Interrupted?.Invoke(this, EventArgs.Empty);
					break;
				}
			}
		}
		catch (Exception exception)
		{
			_logger.LogWarning(exception, "Unable to process action effect");
		}
		finally
		{
			_processActionEffectHook.Original(sourceId, sourceCharacter, pos, effectHeader, effectArray, effectTail);
		}
	}

	public void Dispose()
	{
		_processActionEffectHook.Disable();
		_processActionEffectHook.Dispose();
	}
}