using System.Reflection;
using System.Runtime.CompilerServices;
using System.Transactions;

using Abp.Auditing;
using Abp.Dependency;
using Abp.Domain.Uow;
using Abp.Runtime.Session;
using Abp.Timing;

using Castle.Core.Logging;

using VberZero.Tools;

using ILogger = Castle.Core.Logging.ILogger;

namespace VberZero.Auditing;

public class VzAuditingHelper : IAuditingHelper, ITransientDependency
{
    private readonly IAuditInfoProvider _auditInfoProvider;
    private readonly IAuditingConfiguration _configuration;
    private readonly IUnitOfWorkManager _unitOfWorkManager;
    private readonly IAuditSerializer _auditSerializer;

    public ILogger Logger { get; set; }

    public IAbpSession AbpSession { get; set; }

    public IAuditingStore AuditingStore { get; }

    public VzAuditingHelper(
        IAuditInfoProvider auditInfoProvider,
        IAuditingConfiguration configuration,
        IUnitOfWorkManager unitOfWorkManager,
        IAuditSerializer auditSerializer, IAuditingStore auditingStore)
    {
        _auditInfoProvider = auditInfoProvider;
        _configuration = configuration;
        _unitOfWorkManager = unitOfWorkManager;
        _auditSerializer = auditSerializer;
        AuditingStore = auditingStore;
        AbpSession = NullAbpSession.Instance;
        Logger = NullLogger.Instance;
    }

    public bool ShouldSaveAudit(MethodInfo methodInfo, bool defaultValue = false)
    {
        if (!_configuration.IsEnabled)
            return false;
        if (!_configuration.IsEnabledForAnonymousUsers)
        {
            IAbpSession abpSession = AbpSession;
            if ((abpSession != null ? (!abpSession.UserId.HasValue ? 1 : 0) : 1) != 0)
                return false;
        }
        if (methodInfo == null || !methodInfo.IsPublic)
            return false;
        if (methodInfo.IsDefined(typeof(AuditedAttribute), true))
            return true;
        if (methodInfo.IsDefined(typeof(DisableAuditingAttribute), true))
            return false;
        Type classType = methodInfo.DeclaringType;
        if (classType != null)
        {
            if (classType.GetTypeInfo().IsDefined(typeof(AuditedAttribute), true))
                return true;
            if (classType.GetTypeInfo().IsDefined(typeof(DisableAuditingAttribute), true))
                return false;
            if (_configuration.Selectors.Any(selector => selector.Predicate(classType)))
                return true;
        }
        return defaultValue;
    }

    public AuditInfo CreateAuditInfo(Type type, MethodInfo method, object[] arguments) => CreateAuditInfo(type, method, CreateArgumentsDictionary(method, arguments));

    public AuditInfo CreateAuditInfo(Type type, MethodInfo method, IDictionary<string, object> arguments)
    {
        AuditInfo auditInfo = new AuditInfo()
        {
            TenantId = AbpSession.TenantId,
            UserId = AbpSession.UserId,
            ImpersonatorUserId = AbpSession.ImpersonatorUserId,
            ImpersonatorTenantId = AbpSession.ImpersonatorTenantId,
            ServiceName = type != null ? type.FullName : "",
            MethodName = method.Name,
            Parameters = ConvertArgumentsToJson(arguments),
            ExecutionTime = Clock.Now
        };
        try
        {
            _auditInfoProvider.Fill(auditInfo);
        }
        catch (Exception ex)
        {
            Logger.Warn(ex.ToString(), ex);
        }
        return auditInfo;
    }

    public void Save(AuditInfo auditInfo)
    {
        using (IUnitOfWorkCompleteHandle workCompleteHandle = _unitOfWorkManager.Begin(TransactionScopeOption.Suppress))
        {
            AuditingStore.Save(auditInfo);
            workCompleteHandle.Complete();
        }
    }

    public async Task SaveAsync(AuditInfo auditInfo)
    {
        using (IUnitOfWorkCompleteHandle uow = _unitOfWorkManager.Begin(TransactionScopeOption.Suppress))
        {
            ConfiguredTaskAwaitable configuredTaskAwaitable = AuditingStore.SaveAsync(auditInfo).ConfigureAwait(false);
            await configuredTaskAwaitable;
            configuredTaskAwaitable = uow.CompleteAsync().ConfigureAwait(false);
            await configuredTaskAwaitable;
        }
    }

    private string ConvertArgumentsToJson(IDictionary<string, object> arguments)
    {
        try
        {
            if (arguments.IsNullOrEmpty())
                return "{}";
            Dictionary<string, object> dictionary = new Dictionary<string, object>();
            foreach (KeyValuePair<string, object> keyValuePair in arguments)
            {
                KeyValuePair<string, object> argument = keyValuePair;
                dictionary[argument.Key] = argument.Value == null || !_configuration.IgnoredTypes.Any((t => t.IsInstanceOfType(argument.Value))) ? argument.Value : null;
            }
            return _auditSerializer.Serialize(dictionary);
        }
        catch (Exception ex)
        {
            Logger.Warn(ex.ToString(), ex);
            return "{}";
        }
    }

    private static Dictionary<string, object> CreateArgumentsDictionary(
        MethodInfo method,
        object[] arguments)
    {
        ParameterInfo[] parameters = method.GetParameters();
        Dictionary<string, object> argumentsDictionary = new Dictionary<string, object>();
        for (int index = 0; index < parameters.Length; ++index)
        {
            var name = parameters[index].Name;
            if (name != null)
                argumentsDictionary[name] = arguments[index];
        }

        return argumentsDictionary;
    }
}