using System;
using System.Globalization;
using System.Runtime.Serialization;

namespace SDA.DataProvider
{
    /// <summary>
    /// Hibakódok
    /// </summary>
    public enum SDADataProviderError
    {
        /// <summary>
        /// Ismeretlen hiba
        /// </summary>
        Unknown,

        /// <summary>
        /// Egyedi kulcs megsértése
        /// </summary>
        UniqueKeyViolation,

        /// <summary>
        /// Idegen kulcs megsértése
        /// </summary>
        ForeignKeyViolation,

        /// <summary>
        /// A tábla vagy nézet nem létezik
        /// </summary>
        TableOrViewNotExists,

        /// <summary>
        /// Érvénytelen oszlopnév
        /// </summary>
        InvalidColumnName,

        /// <summary>
        /// Null érték nem beszúrható
        /// </summary>
        CannotInsertNull,

        /// <summary>
        /// Adatbázis-kapcsolati hiba
        /// </summary>
        CommunicationError,

        /// <summary>
        /// Táblaterekkel, rendelkezésre álló hellyel kapcsolatos hiba
        /// </summary>
        TableSpaceError,

        /// <summary>
        /// Deadlock történt
        /// </summary>
        DeadlockDetected,

        /// <summary>
        /// Adatbázis művelet időtúllépés történt
        /// </summary>
        CommandTimeout
    }

    /// <summary>
    /// Adatbázis hibát jelző kivétel.
    /// </summary>
    [Serializable]
    public class SDADataProviderException : Exception
    {
        const string DefaultMessage = "SQL error!";

        const string DefaultCommand = "";

        const int DefaultDatabaseNumber = -1;

        readonly string _commandText = DefaultCommand;

        /// <summary>
        /// Mező annak jelzésére, hogy a művelet végrehajtását célszerű-e 
        /// újra megpróbálni, mielőtt a kivételt továbbdobjuk.
        /// </summary>
        internal readonly bool MustRetry = false;

        /// <summary>
        /// Hibakód.
        /// </summary>
        public SDADataProviderError Error { get; protected set; }

        /// <summary>
        /// Az eredeti - adatbázisfüggő - hibakód.
        /// </summary>
        public int DatabaseSpecificNumber { get; protected set; }

        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        public SDADataProviderException()
            : base(DefaultMessage)
        {
            Error = SDADataProviderError.Unknown;
            DatabaseSpecificNumber = DefaultDatabaseNumber;
        }

        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        public SDADataProviderException(string message)
            : base(message ?? DefaultMessage)
        {
            Error = SDADataProviderError.Unknown;
            DatabaseSpecificNumber = DefaultDatabaseNumber;
        }

        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        public SDADataProviderException(string message, Exception innerException)
            : base(message ?? DefaultMessage, innerException)
        {
            Error = SDADataProviderError.Unknown;
            DatabaseSpecificNumber = DefaultDatabaseNumber;
        }

        internal SDADataProviderException(Exception innerException)
            : this(innerException == null ? DefaultMessage : innerException.Message, innerException) { }

        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        protected SDADataProviderException(SerializationInfo info, StreamingContext context)
            : base(info, context)
        {
            if (info == null)
            {
                throw new ArgumentNullException(nameof(info));
            }

            Error = (SDADataProviderError)info.GetValue("Error", typeof(SDADataProviderError));
            DatabaseSpecificNumber = info.GetInt32("DatabaseSpecificNumber");
            MustRetry = info.GetBoolean("MustRetry");
        }

        internal SDADataProviderException(Exception innerException, SDADataProviderError error, int number, bool mustRetry, string commandText)
            : this(innerException == null ? DefaultMessage : innerException.Message, innerException)
        {
            Error = error;
            DatabaseSpecificNumber = number;
            MustRetry = mustRetry;
            _commandText = commandText ?? DefaultCommand;
        }

        internal SDADataProviderException(Exception innerException, SDADataProviderError error, string commandText)
            : this(innerException, error, DefaultDatabaseNumber, false, commandText) { }

        internal SDADataProviderException(Exception innerException, SDADataProviderError error, int number, string commandText)
            : this(innerException, error, number, false, commandText) { }

        internal SDADataProviderException(Exception innerException, SDADataProviderError error, int number, bool mustRetry)
            : this(innerException, error, number, mustRetry, DefaultCommand) { }

        /// <summary>
        /// A kivétel üzenete.
        /// </summary>
        public override string Message
        {
            get
            {
                if (!string.IsNullOrWhiteSpace(_commandText))
                {
                    return string.Format(
                        CultureInfo.InvariantCulture,
@"{0}: {1}
{2}",
                        DatabaseSpecificNumber,
                        _commandText,
                        base.Message);
                }
                return string.Format(
                    CultureInfo.InvariantCulture,
@"{0}
{1}",
                    DatabaseSpecificNumber,
                    base.Message);
            }
        }

        /// <summary>
        /// Sorosítás.
        /// </summary>
        public override void GetObjectData(SerializationInfo info, StreamingContext context)
        {
            if (info == null)
            {
                throw new ArgumentNullException(nameof(info));
            }

            base.GetObjectData(info, context);
            info.AddValue("Error", Error);
            info.AddValue("DatabaseSpecificNumber", DatabaseSpecificNumber);
            info.AddValue("MustRetry", MustRetry);
        }
    }

    /// <summary>
    /// Holtpont.
    /// </summary>
    [Serializable]
    public sealed class DeadlockException : SDADataProviderException
    {
        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        public DeadlockException() { }

        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        public DeadlockException(string message)
            : base(message) { }

        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        public DeadlockException(string message, Exception inner)
            : base(message, inner) { }

        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        DeadlockException(SerializationInfo info, StreamingContext context)
            : base(info, context) { }

        internal DeadlockException(Exception innerException, int number, string commandText)
            : base(innerException, SDADataProviderError.DeadlockDetected, number, false, commandText) { }
    }

    /// <summary>
    /// Adatbázis művelet időtúllépés.
    /// </summary>
    [Serializable]
    public sealed class CommandTimeoutException : SDADataProviderException
    {
        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        public CommandTimeoutException() { }

        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        public CommandTimeoutException(string message)
            : base(message) { }

        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        public CommandTimeoutException(string message, Exception inner)
            : base(message, inner) { }

        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        CommandTimeoutException(SerializationInfo info, StreamingContext context)
            : base(info, context) { }

        internal CommandTimeoutException(Exception innerException, int number, string commandText)
            : base(innerException, SDADataProviderError.CommandTimeout, number, false, commandText) { }
    }

    /// <summary>
    /// Táblatér hiba.
    /// </summary>
    [Serializable]
    public sealed class TableSpaceErrorException : SDADataProviderException
    {
        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        public TableSpaceErrorException() { }

        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        public TableSpaceErrorException(string message)
            : base(message) { }

        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        public TableSpaceErrorException(string message, Exception inner)
            : base(message, inner) { }

        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        TableSpaceErrorException(SerializationInfo info, StreamingContext context)
            : base(info, context) { }

        internal TableSpaceErrorException(Exception innerException, int number, string commandText)
            : base(innerException, SDADataProviderError.TableSpaceError, number, false, commandText) { }
    }

    /// <summary>
    /// Egyediség megsértése.
    /// </summary>
    [Serializable]
    public sealed class UniqueKeyViolationException : SDADataProviderException
    {
        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        public UniqueKeyViolationException() { }

        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        public UniqueKeyViolationException(string message)
            : base(message) { }

        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        public UniqueKeyViolationException(string message, Exception inner)
            : base(message, inner) { }

        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        UniqueKeyViolationException(SerializationInfo info, StreamingContext context)
            : base(info, context) { }

        internal UniqueKeyViolationException(Exception innerException, int number, string commandText)
            : base(innerException, SDADataProviderError.UniqueKeyViolation, number, false, commandText) { }
    }

    /// <summary>
    /// Idegen kulcs megsértése.
    /// </summary>
    [Serializable]
    public sealed class ForeignKeyViolationException : SDADataProviderException
    {
        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        public ForeignKeyViolationException() { }

        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        public ForeignKeyViolationException(string message)
            : base(message) { }

        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        public ForeignKeyViolationException(string message, Exception inner)
            : base(message, inner) { }

        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        ForeignKeyViolationException(SerializationInfo info, StreamingContext context)
            : base(info, context) { }

        internal ForeignKeyViolationException(Exception innerException, int number, string commandText)
            : base(innerException, SDADataProviderError.ForeignKeyViolation, number, false, commandText) { }
    }

    /// <summary>
    /// Tábla vagy nézet nem létezik.
    /// </summary>
    [Serializable]
    public sealed class TableOrViewNotExistsException : SDADataProviderException
    {
        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        public TableOrViewNotExistsException() { }

        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        public TableOrViewNotExistsException(string message)
            : base(message) { }

        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        public TableOrViewNotExistsException(string message, Exception inner)
            : base(message, inner) { }

        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        TableOrViewNotExistsException(SerializationInfo info, StreamingContext context)
            : base(info, context) { }

        internal TableOrViewNotExistsException(Exception innerException, int number, string commandText)
            : base(innerException, SDADataProviderError.TableOrViewNotExists, number, false, commandText) { }
    }

    /// <summary>
    /// Oszlop nem létezik.
    /// </summary>
    [Serializable]
    public sealed class InvalidColumnNameException : SDADataProviderException
    {
        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        public InvalidColumnNameException() { }

        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        public InvalidColumnNameException(string message)
            : base(message) { }

        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        public InvalidColumnNameException(string message, Exception inner)
            : base(message, inner) { }

        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        InvalidColumnNameException(SerializationInfo info, StreamingContext context)
            : base(info, context) { }

        internal InvalidColumnNameException(Exception innerException, int number, string commandText)
            : base(innerException, SDADataProviderError.InvalidColumnName, number, false, commandText) { }
    }

    /// <summary>
    /// Kommunikációs hiba.
    /// </summary>
    [Serializable]
    public sealed class CommunicationErrorException : SDADataProviderException
    {
        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        public CommunicationErrorException() { }

        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        public CommunicationErrorException(string message)
            : base(message) { }

        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        public CommunicationErrorException(string message, Exception inner)
            : base(message, inner) { }

        /// <summary>
        /// Szabványos konstruktor.
        /// </summary>
        CommunicationErrorException(SerializationInfo info, StreamingContext context)
            : base(info, context) { }

        internal CommunicationErrorException(Exception innerException, int number)
            : base(innerException, SDADataProviderError.CommunicationError, number, false) { }

        internal CommunicationErrorException(Exception innerException, int number, bool mustRetry)
            : base(innerException, SDADataProviderError.CommunicationError, number, mustRetry) { }
    }
}