using MareSynchronos.API.Data.Enum;
using MareSynchronos.PlayerData.Data;
using MareSynchronos.PlayerData.Factories;
using MareSynchronos.PlayerData.Handlers;
using MareSynchronos.Services;
using MareSynchronos.Services.Mediator;
using Microsoft.Extensions.Logging;

namespace MareSynchronos.PlayerData.Services;

#pragma warning disable MA0040

public sealed class CacheCreationService : DisposableMediatorSubscriberBase
{
    private readonly SemaphoreSlim _cacheCreateLock = new(1);
    private readonly Dictionary<ObjectKind, GameObjectHandler> _cachesToCreate = [];
    private readonly PlayerDataFactory _characterDataFactory;
    private readonly CancellationTokenSource _cts = new();
    private readonly CharacterData _playerData = new();
    private readonly Dictionary<ObjectKind, GameObjectHandler> _playerRelatedObjects = [];
    private Task? _cacheCreationTask;
    private CancellationTokenSource _honorificCts = new();
    private bool _isZoning = false;
    private CancellationTokenSource _palettePlusCts = new();

    public CacheCreationService(ILogger<CacheCreationService> logger, MareMediator mediator, GameObjectHandlerFactory gameObjectHandlerFactory,
        PlayerDataFactory characterDataFactory, DalamudUtilService dalamudUtil) : base(logger, mediator)
    {
        _characterDataFactory = characterDataFactory;

        Mediator.Subscribe<CreateCacheForObjectMessage>(this, (msg) =>
        {
            Logger.LogDebug("Received CreateCacheForObject for {handler}, updating", msg.ObjectToCreateFor);
            _cacheCreateLock.Wait();
            _cachesToCreate[msg.ObjectToCreateFor.ObjectKind] = msg.ObjectToCreateFor;
            _cacheCreateLock.Release();
        });

        Mediator.Subscribe<ZoneSwitchStartMessage>(this, (msg) => _isZoning = true);
        Mediator.Subscribe<ZoneSwitchEndMessage>(this, (msg) => _isZoning = false);

        _playerRelatedObjects[ObjectKind.Player] = gameObjectHandlerFactory.Create(ObjectKind.Player, dalamudUtil.GetPlayerPointer, isWatched: true)
            .GetAwaiter().GetResult();
        _playerRelatedObjects[ObjectKind.MinionOrMount] = gameObjectHandlerFactory.Create(ObjectKind.MinionOrMount, () => dalamudUtil.GetMinionOrMount(), isWatched: true)
            .GetAwaiter().GetResult();
        _playerRelatedObjects[ObjectKind.Pet] = gameObjectHandlerFactory.Create(ObjectKind.Pet, () => dalamudUtil.GetPet(), isWatched: true)
            .GetAwaiter().GetResult();
        _playerRelatedObjects[ObjectKind.Companion] = gameObjectHandlerFactory.Create(ObjectKind.Companion, () => dalamudUtil.GetCompanion(), isWatched: true)
            .GetAwaiter().GetResult();

        Mediator.Subscribe<ClearCacheForObjectMessage>(this, (msg) =>
        {
            _ = Task.Run(() =>
            {
                Logger.LogTrace("Clearing cache for {obj}", msg.ObjectToCreateFor);
                _playerData.FileReplacements.Remove(msg.ObjectToCreateFor.ObjectKind);
                _playerData.GlamourerString.Remove(msg.ObjectToCreateFor.ObjectKind);
                _playerData.CustomizePlusScale.Remove(msg.ObjectToCreateFor.ObjectKind);
                Mediator.Publish(new CharacterDataCreatedMessage(_playerData.ToAPI()));
            });
        });

        Mediator.Subscribe<CustomizePlusMessage>(this, async (msg) =>
        {
            if (_isZoning) return;
            foreach (var item in _playerRelatedObjects
                .Where(item => string.IsNullOrEmpty(msg.ProfileName)
                || string.Equals(item.Value.Name, msg.ProfileName, StringComparison.Ordinal)).Select(k => k.Key))
            {
                Logger.LogDebug("Received CustomizePlus change, updating {obj}", item);
                await AddPlayerCacheToCreate(item).ConfigureAwait(false);
            }
        });
        Mediator.Subscribe<HeelsOffsetMessage>(this, async (_) =>
        {
            if (_isZoning) return;
            Logger.LogDebug("Received Heels Offset change, updating player");
            await AddPlayerCacheToCreate().ConfigureAwait(false);
        });
        Mediator.Subscribe<PalettePlusMessage>(this, (msg) =>
        {
            if (_isZoning) return;
            if (msg.Character.Address == _playerRelatedObjects[ObjectKind.Player].Address)
            {
                Logger.LogDebug("Received PalettePlus change, updating player");
                PalettePlusChanged();
            }
        });
        Mediator.Subscribe<HonorificMessage>(this, (msg) =>
        {
            if (_isZoning) return;
            if (!string.Equals(msg.NewHonorificTitle, _playerData.HonorificData, StringComparison.Ordinal))
            {
                Logger.LogDebug("Received Honorific change, updating player");
                HonorificChanged();
            }
        });
        Mediator.Subscribe<PenumbraModSettingChangedMessage>(this, async (msg) =>
        {
            Logger.LogDebug("Received Penumbra Mod settings change, updating player");
            await AddPlayerCacheToCreate().ConfigureAwait(false);
        });

        Mediator.Subscribe<DelayedFrameworkUpdateMessage>(this, (msg) => ProcessCacheCreation());
    }

    protected override void Dispose(bool disposing)
    {
        base.Dispose(disposing);

        _playerRelatedObjects.Values.ToList().ForEach(p => p.Dispose());
        _cts.Dispose();
    }

    private async Task AddPlayerCacheToCreate(ObjectKind kind = ObjectKind.Player)
    {
        await _cacheCreateLock.WaitAsync().ConfigureAwait(false);
        _cachesToCreate[kind] = _playerRelatedObjects[kind];
        _cacheCreateLock.Release();
    }

    private void HonorificChanged()
    {
        _honorificCts?.Cancel();
        _honorificCts?.Dispose();
        _honorificCts = new();
        var token = _honorificCts.Token;

        _ = Task.Run(async () =>
        {
            await Task.Delay(TimeSpan.FromSeconds(3), token).ConfigureAwait(false);
            await AddPlayerCacheToCreate().ConfigureAwait(false);
        }, token);
    }

    private void PalettePlusChanged()
    {
        _palettePlusCts?.Cancel();
        _palettePlusCts?.Dispose();
        _palettePlusCts = new();
        var token = _palettePlusCts.Token;

        _ = Task.Run(async () =>
        {
            await Task.Delay(TimeSpan.FromSeconds(1), token).ConfigureAwait(false);
            await AddPlayerCacheToCreate().ConfigureAwait(false);
        }, token);
    }

    private void ProcessCacheCreation()
    {
        if (_isZoning) return;

        if (_cachesToCreate.Any() && (_cacheCreationTask?.IsCompleted ?? true))
        {
            _cacheCreateLock.Wait();
            var toCreate = _cachesToCreate.ToList();
            _cachesToCreate.Clear();
            _cacheCreateLock.Release();

            _cacheCreationTask = Task.Run(async () =>
            {
                try
                {
                    foreach (var obj in toCreate)
                    {
                        await _characterDataFactory.BuildCharacterData(_playerData, obj.Value, _cts.Token).ConfigureAwait(false);
                    }

                    Mediator.Publish(new CharacterDataCreatedMessage(_playerData.ToAPI()));
                }
                catch (Exception ex)
                {
                    Logger.LogCritical(ex, "Error during Cache Creation Processing");
                }
                finally
                {
                    Logger.LogDebug("Cache Creation complete");
                }
            }, _cts.Token);
        }
        else if (_cachesToCreate.Any())
        {
            Logger.LogDebug("Cache Creation stored until previous creation finished");
        }
    }
}
#pragma warning restore MA0040