using System.Xml.Serialization;
using Newtonsoft.Json;
using SabreTools.Core;
using SabreTools.Core.Tools;
using SabreTools.FileTypes;
using SabreTools.IO.Extensions;

namespace SabreTools.DatItems.Formats
{
    /// <summary>
    /// Represents a generic file within a set
    /// </summary>
    [JsonObject("rom"), XmlRoot("rom")]
    public sealed class Rom : DatItem<Models.Metadata.Rom>
    {
        #region Constants

        /// <summary>
        /// Non-standard key for inverted logic
        /// </summary>
        public const string DataAreaKey = "DATAAREA";

        /// <summary>
        /// Non-standard key for inverted logic
        /// </summary>
        public const string PartKey = "PART";

        #endregion

        #region Fields

        /// <inheritdoc>/>
        protected override ItemType ItemType => ItemType.Rom;

        /// <inheritdoc>/>
        protected override string? NameKey => Models.Metadata.Rom.NameKey;

        [JsonIgnore]
        public bool ItemStatusSpecified
        {
            get
            {
                var status = GetStringFieldValue(Models.Metadata.Rom.StatusKey).AsEnumValue<ItemStatus>();
                return status != ItemStatus.NULL && status != ItemStatus.None;
            }
        }

        [JsonIgnore]
        public bool OriginalSpecified
        {
            get
            {
                var original = GetFieldValue<Original?>("ORIGINAL");
                return original != null && original != default;
            }
        }

        [JsonIgnore]
        public bool DataAreaSpecified
        {
            get
            {
                var dataArea = GetFieldValue<DataArea?>(Rom.DataAreaKey);
                return dataArea != null
                    && (!string.IsNullOrEmpty(dataArea.GetName())
                        || dataArea.GetInt64FieldValue(Models.Metadata.DataArea.SizeKey) != null
                        || dataArea.GetInt64FieldValue(Models.Metadata.DataArea.WidthKey) != null
                        || dataArea.GetStringFieldValue(Models.Metadata.DataArea.EndiannessKey).AsEnumValue<Endianness>() != Endianness.NULL);
            }
        }

        [JsonIgnore]
        public bool PartSpecified
        {
            get
            {
                var part = GetFieldValue<Part?>(Rom.PartKey);
                return part != null
                    && (!string.IsNullOrEmpty(part.GetName())
                        || !string.IsNullOrEmpty(part.GetStringFieldValue(Models.Metadata.Part.InterfaceKey)));
            }
        }

        #endregion

        #region Constructors

        public Rom() : base()
        {
            SetFieldValue<DupeType>(DatItem.DupeTypeKey, 0x00);
            SetFieldValue<string?>(Models.Metadata.Rom.StatusKey, ItemStatus.None.AsStringValue());
        }

        public Rom(BaseFile baseFile) : base()
        {
            SetName(baseFile.Filename);
            SetFieldValue<string?>(Models.Metadata.Rom.DateKey, baseFile.Date);
            SetFieldValue<string?>(Models.Metadata.Rom.CRCKey, ByteArrayExtensions.ByteArrayToString(baseFile.CRC));
            SetFieldValue<string?>(Models.Metadata.Rom.MD5Key, ByteArrayExtensions.ByteArrayToString(baseFile.MD5));
            SetFieldValue<string?>(Models.Metadata.Rom.SHA1Key, ByteArrayExtensions.ByteArrayToString(baseFile.SHA1));
            SetFieldValue<string?>(Models.Metadata.Rom.SHA256Key, ByteArrayExtensions.ByteArrayToString(baseFile.SHA256));
            SetFieldValue<string?>(Models.Metadata.Rom.SHA384Key, ByteArrayExtensions.ByteArrayToString(baseFile.SHA384));
            SetFieldValue<string?>(Models.Metadata.Rom.SHA512Key, ByteArrayExtensions.ByteArrayToString(baseFile.SHA512));
            SetFieldValue<string?>(Models.Metadata.Rom.SizeKey, baseFile.Size.ToString());
            if (baseFile.SpamSum != null)
                SetFieldValue<string?>(Models.Metadata.Rom.SpamSumKey, System.Text.Encoding.UTF8.GetString(baseFile.SpamSum));

            SetFieldValue<DupeType>(DatItem.DupeTypeKey, 0x00);
        }

        public Rom(Models.Metadata.Rom item) : base(item)
        {
            SetFieldValue<DupeType>(DatItem.DupeTypeKey, 0x00);
        }

        #endregion

        #region Cloning Methods

        /// <summary>
        /// Convert Rom object to a BaseFile
        /// </summary>
        public BaseFile ConvertToBaseFile()
        {
            string? spamSum = GetStringFieldValue(Models.Metadata.Rom.SpamSumKey);
            return new BaseFile()
            {
                Filename = GetName(),
                Parent = GetFieldValue<Machine>(DatItem.MachineKey)!.GetStringFieldValue(Models.Metadata.Machine.NameKey),
                Date = GetStringFieldValue(Models.Metadata.Rom.DateKey),
                Size = NumberHelper.ConvertToInt64(GetStringFieldValue(Models.Metadata.Rom.SizeKey)),
                CRC = ByteArrayExtensions.StringToByteArray(GetStringFieldValue(Models.Metadata.Rom.CRCKey)),
                MD5 = ByteArrayExtensions.StringToByteArray(GetStringFieldValue(Models.Metadata.Rom.MD5Key)),
                SHA1 = ByteArrayExtensions.StringToByteArray(GetStringFieldValue(Models.Metadata.Rom.SHA1Key)),
                SHA256 = ByteArrayExtensions.StringToByteArray(GetStringFieldValue(Models.Metadata.Rom.SHA256Key)),
                SHA384 = ByteArrayExtensions.StringToByteArray(GetStringFieldValue(Models.Metadata.Rom.SHA384Key)),
                SHA512 = ByteArrayExtensions.StringToByteArray(GetStringFieldValue(Models.Metadata.Rom.SHA512Key)),
                SpamSum = spamSum != null ? System.Text.Encoding.UTF8.GetBytes(spamSum) : null,
            };
        }

        #endregion

        #region Comparision Methods

        /// <summary>
        /// Fill any missing size and hash information from another Rom
        /// </summary>
        /// <param name="other">Rom to fill information from</param>
        public void FillMissingInformation(Rom other) => _internal.FillMissingHashes(other?._internal);

        /// <summary>
        /// Get unique duplicate suffix on name collision
        /// </summary>
        /// <returns>String representing the suffix</returns>
        public string GetDuplicateSuffix() => _internal.GetDuplicateSuffix();

        /// <summary>
        /// Returns if the Rom contains any hashes
        /// </summary>
        /// <returns>True if any hash exists, false otherwise</returns>
        public bool HasHashes() => _internal.HasHashes();

        /// <summary>
        /// Returns if all of the hashes are set to their 0-byte values
        /// </summary>
        /// <returns>True if any hash matches the 0-byte value, false otherwise</returns>
        public bool HasZeroHash() => _internal.HasZeroHash();

        #endregion

        #region Sorting and Merging

        /// <inheritdoc/>
        public override string GetKey(ItemKey bucketedBy, bool lower = true, bool norename = true)
        {
            // Set the output key as the default blank string
            string? key;

            // Now determine what the key should be based on the bucketedBy value
            switch (bucketedBy)
            {
                case ItemKey.CRC:
                    key = GetStringFieldValue(Models.Metadata.Rom.CRCKey);
                    break;

                case ItemKey.MD5:
                    key = GetStringFieldValue(Models.Metadata.Rom.MD5Key);
                    break;

                case ItemKey.SHA1:
                    key = GetStringFieldValue(Models.Metadata.Rom.SHA1Key);
                    break;

                case ItemKey.SHA256:
                    key = GetStringFieldValue(Models.Metadata.Rom.SHA256Key);
                    break;

                case ItemKey.SHA384:
                    key = GetStringFieldValue(Models.Metadata.Rom.SHA384Key);
                    break;

                case ItemKey.SHA512:
                    key = GetStringFieldValue(Models.Metadata.Rom.SHA512Key);
                    break;

                case ItemKey.SpamSum:
                    key = GetStringFieldValue(Models.Metadata.Rom.SpamSumKey);
                    break;

                // Let the base handle generic stuff
                default:
                    return base.GetKey(bucketedBy, lower, norename);
            }

            // Double and triple check the key for corner cases
            key ??= string.Empty;

            return key;
        }

        #endregion
    }
}