using System;
using System.Collections.Generic;
using System.Linq;
using SabreTools.Core;
using SabreTools.Core.Tools;
using SabreTools.DatItems;
using SabreTools.DatItems.Formats;

namespace SabreTools.DatFiles.Formats
{
    /// <summary>
    /// Represents parsing a SoftwareList
    /// </summary>
    internal partial class SoftwareList : DatFile
    {
        /// <inheritdoc/>
        public override void ParseFile(string filename, int indexId, bool keep, bool statsOnly = false, bool throwOnError = false)
        {
            try
            {
                // Deserialize the input file
                var softwarelist = new Serialization.Files.SoftwareList().Deserialize(filename);

                // Convert the header to the internal format
                ConvertHeader(softwarelist, keep);

                // Convert the software data to the internal format
                ConvertSoftware(softwarelist?.Software, filename, indexId, statsOnly);
            }
            catch (Exception ex) when (!throwOnError)
            {
                string message = $"'{filename}' - An error occurred during parsing";
                logger.Error(ex, message);
            }
        }

        #region Converters

        /// <summary>
        /// Convert header information
        /// </summary>
        /// <param name="softwarelist">Deserialized model to convert</param>
        /// <param name="keep">True if full pathnames are to be kept, false otherwise (default)</param>
        private void ConvertHeader(Models.SoftwareList.SoftwareList? softwarelist, bool keep)
        {
            // If the datafile is missing, we can't do anything
            if (softwarelist == null)
                return;

            if (Header.GetFieldValue<string?>(Models.Metadata.Header.NameKey) == null)
                Header.SetFieldValue<string?>(Models.Metadata.Header.NameKey, softwarelist.Name);
            if (Header.GetFieldValue<string?>(Models.Metadata.Header.DescriptionKey) == null)
                Header.SetFieldValue<string?>(Models.Metadata.Header.DescriptionKey, softwarelist.Description);
            if (Header.GetFieldValue<string?>(Models.Metadata.Header.CommentKey) == null)
                Header.SetFieldValue<string?>(Models.Metadata.Header.CommentKey, softwarelist.Notes);

            // Handle implied SuperDAT
            if (Header.GetFieldValue<string?>(Models.Metadata.Header.NameKey)?.Contains(" - SuperDAT") == true && keep)
            {
                if (Header.GetFieldValue<string?>(Models.Metadata.Header.TypeKey) == null)
                    Header.SetFieldValue<string?>(Models.Metadata.Header.TypeKey, "SuperDAT");
            }
        }

        /// <summary>
        /// Convert software information
        /// </summary>
        /// <param name="software">Array of deserialized models to convert</param>
        /// <param name="filename">Name of the file to be parsed</param>
        /// <param name="indexId">Index ID for the DAT</param>
        /// <param name="statsOnly">True to only add item statistics while parsing, false otherwise</param>
        private void ConvertSoftware(Models.SoftwareList.Software[]? software, string filename, int indexId, bool statsOnly)
        {
            // If the game array is missing, we can't do anything
            if (software == null || !software.Any())
                return;

            // Loop through the software and add
            foreach (var sw in software)
            {
                ConvertSoftware(sw, filename, indexId, statsOnly);
            }
        }

        /// <summary>
        /// Convert software information
        /// </summary>
        /// <param name="software">Deserialized model to convert</param>
        /// <param name="filename">Name of the file to be parsed</param>
        /// <param name="indexId">Index ID for the DAT</param>
        /// <param name="statsOnly">True to only add item statistics while parsing, false otherwise</param>
        private void ConvertSoftware(Models.SoftwareList.Software software, string filename, int indexId, bool statsOnly)
        {
            // If the game is missing, we can't do anything
            if (software == null)
                return;

            // Create the machine for copying information
            var machine = new Machine();
            machine.SetFieldValue<string?>(Models.Metadata.Machine.CloneOfKey, software.CloneOf);
            machine.SetFieldValue<string?>(Models.Metadata.Machine.CommentKey, software.Notes);
            machine.SetFieldValue<string?>(Models.Metadata.Machine.DescriptionKey, software.Description);
            machine.SetFieldValue<string?>(Models.Metadata.Machine.NameKey, software.Name);
            machine.SetFieldValue<string?>(Models.Metadata.Machine.PublisherKey, software.Publisher);
            machine.SetFieldValue<Supported>(Models.Metadata.Machine.SupportedKey, software.Supported.AsEnumValue<Supported>());
            machine.SetFieldValue<string?>(Models.Metadata.Machine.YearKey, software.Year);

            // Add all Info objects
            foreach (var info in software.Info ?? [])
            {
                var infoItem = new Info();
                infoItem.SetName(info.Name);
                infoItem.SetFieldValue<Source?>(DatItem.SourceKey, new Source { Index = indexId, Name = filename });
                infoItem.SetFieldValue<string?>(Models.Metadata.Info.ValueKey, info.Value);

                infoItem.CopyMachineInformation(machine);
                ParseAddHelper(infoItem, statsOnly);
            }

            // Add all SharedFeat objects
            foreach (var sharedfeat in software.SharedFeat ?? [])
            {
                var sharedfeatItem = new SharedFeat();
                sharedfeatItem.SetName(sharedfeat.Name);
                sharedfeatItem.SetFieldValue<Source?>(DatItem.SourceKey, new Source { Index = indexId, Name = filename });
                sharedfeatItem.SetFieldValue<string?>(Models.Metadata.SharedFeat.ValueKey, sharedfeat.Value);

                sharedfeatItem.CopyMachineInformation(machine);
                ParseAddHelper(sharedfeatItem, statsOnly);
            }

            // Check if there are any items
            bool containsItems = false;

            // Loop through each type of item
            ConvertPart(software.Part, machine, filename, indexId, statsOnly, ref containsItems);

            // If we had no items, create a Blank placeholder
            if (!containsItems)
            {
                var blank = new Blank();
                blank.SetFieldValue<Source?>(DatItem.SourceKey, new Source { Index = indexId, Name = filename });

                blank.CopyMachineInformation(machine);
                ParseAddHelper(blank, statsOnly);
            }
        }

        /// <summary>
        /// Convert Part information
        /// </summary>
        /// <param name="parts">Array of deserialized models to convert</param>
        /// <param name="machine">Prefilled machine to use</param>
        /// <param name="filename">Name of the file to be parsed</param>
        /// <param name="indexId">Index ID for the DAT</param>
        /// <param name="statsOnly">True to only add item statistics while parsing, false otherwise</param>
        /// <param name="containsItems">True if there were any items in the array, false otherwise</param>
        private void ConvertPart(Models.SoftwareList.Part[]? parts, Machine machine, string filename, int indexId, bool statsOnly, ref bool containsItems)
        {
            // If the parts array is missing, we can't do anything
            if (parts == null || !parts.Any())
                return;

            foreach (var part in parts)
            {
                var item = new Part();
                item.SetName(part.Name);
                item.SetFieldValue<string?>(Models.Metadata.Part.InterfaceKey, part.Interface);
                item.SetFieldValue<PartFeature[]?>(Models.Metadata.Part.FeatureKey, CreateFeatures(part.Feature, machine, filename, indexId, statsOnly));
                item.SetFieldValue<Source?>(DatItem.SourceKey, new Source { Index = indexId, Name = filename });

                item.CopyMachineInformation(machine);

                ConvertDataArea(part.DataArea, item, machine, filename, indexId, statsOnly, ref containsItems);
                ConvertDiskArea(part.DiskArea, item, machine, filename, indexId, statsOnly, ref containsItems);
                ConvertDipSwitch(part.DipSwitch, item, machine, filename, indexId, statsOnly, ref containsItems);
            }
        }

        /// <summary>
        /// Convert Feature information
        /// </summary>
        /// <param name="features">Array of deserialized models to convert</param>
        /// <param name="machine">Prefilled machine to use</param>
        /// <param name="filename">Name of the file to be parsed</param>
        /// <param name="indexId">Index ID for the DAT</param>
        /// <param name="statsOnly">True to only add item statistics while parsing, false otherwise</param>
        private static PartFeature[]? CreateFeatures(Models.SoftwareList.Feature[]? features, Machine machine, string filename, int indexId, bool statsOnly)
        {
            // If the feature array is missing, we can't do anything
            if (features == null || !features.Any())
                return null;

            var partFeatures = new List<PartFeature>();
            foreach (var feature in features)
            {
                var item = new PartFeature();
                item.SetName(feature.Name);
                item.SetFieldValue<Source?>(DatItem.SourceKey, new Source { Index = indexId, Name = filename });
                item.SetFieldValue<string?>(Models.Metadata.Feature.ValueKey, feature.Value);

                item.CopyMachineInformation(machine);
                partFeatures.Add(item);
            }

            return [.. partFeatures];
        }

        /// <summary>
        /// Convert DataArea information
        /// </summary>
        /// <param name="dataareas">Array of deserialized models to convert</param>
        /// <param name="part">Parent Part to use</param>
        /// <param name="machine">Prefilled machine to use</param>
        /// <param name="filename">Name of the file to be parsed</param>
        /// <param name="indexId">Index ID for the DAT</param>
        /// <param name="statsOnly">True to only add item statistics while parsing, false otherwise</param>
        /// <param name="containsItems">True if there were any items in the array, false otherwise</param>
        private void ConvertDataArea(Models.SoftwareList.DataArea[]? dataareas, Part part, Machine machine, string filename, int indexId, bool statsOnly, ref bool containsItems)
        {
            // If the dataarea array is missing, we can't do anything
            if (dataareas == null || !dataareas.Any())
                return;

            foreach (var dataarea in dataareas)
            {
                var item = new DataArea();
                item.SetName(dataarea.Name);
                item.SetFieldValue<Endianness?>(Models.Metadata.DataArea.EndiannessKey, dataarea.Endianness.AsEnumValue<Endianness>());
                item.SetFieldValue<long?>(Models.Metadata.DataArea.SizeKey, NumberHelper.ConvertToInt64(dataarea.Size));
                item.SetFieldValue<Source?>(DatItem.SourceKey, new Source { Index = indexId, Name = filename });
                item.SetFieldValue<long?>(Models.Metadata.DataArea.WidthKey, NumberHelper.ConvertToInt64(dataarea.Width));

                item.CopyMachineInformation(machine);
                ConvertRoms(dataarea.Rom, part, item, machine, filename, indexId, statsOnly, ref containsItems);
            }
        }

        /// <summary>
        /// Convert Rom information
        /// </summary>
        /// <param name="roms">Array of deserialized models to convert</param>
        /// <param name="part">Parent Part to use</param>
        /// <param name="dataarea">Parent DataArea to use</param>
        /// <param name="machine">Prefilled machine to use</param>
        /// <param name="filename">Name of the file to be parsed</param>
        /// <param name="indexId">Index ID for the DAT</param>
        /// <param name="statsOnly">True to only add item statistics while parsing, false otherwise</param>
        /// <param name="containsItems">True if there were any items in the array, false otherwise</param>
        private void ConvertRoms(Models.SoftwareList.Rom[]? roms, Part part, DataArea dataarea, Machine machine, string filename, int indexId, bool statsOnly, ref bool containsItems)
        {
            // If the rom array is missing, we can't do anything
            if (roms == null || !roms.Any())
                return;

            containsItems = true;
            foreach (var rom in roms)
            {
                var item = new Rom();
                item.SetName(rom.Name);
                item.SetFieldValue<string?>(Models.Metadata.Rom.CRCKey, rom.CRC);
                item.SetFieldValue<DataArea?>(Rom.DataAreaKey, dataarea);
                item.SetFieldValue<LoadFlag>(Models.Metadata.Rom.LoadFlagKey, rom.LoadFlag.AsEnumValue<LoadFlag>());
                item.SetFieldValue<string?>(Models.Metadata.Rom.OffsetKey, rom.Offset);
                item.SetFieldValue<Part?>(Rom.PartKey, part);
                item.SetFieldValue<string?>(Models.Metadata.Rom.SHA1Key, rom.SHA1);
                item.SetFieldValue<long?>(Models.Metadata.Rom.SizeKey, NumberHelper.ConvertToInt64(rom.Size ?? rom.Length));
                item.SetFieldValue<Source?>(DatItem.SourceKey, new Source { Index = indexId, Name = filename });
                item.SetFieldValue<ItemStatus>(Models.Metadata.Rom.StatusKey, rom.Status.AsEnumValue<ItemStatus>());
                item.SetFieldValue<string?>(Models.Metadata.Rom.ValueKey, rom.Value);

                item.CopyMachineInformation(machine);
                ParseAddHelper(item, statsOnly);
            }
        }

        /// <summary>
        /// Convert DiskArea information
        /// </summary>
        /// <param name="diskareas">Array of deserialized models to convert</param>
        /// <param name="part">Parent Part to use</param>
        /// <param name="machine">Prefilled machine to use</param>
        /// <param name="filename">Name of the file to be parsed</param>
        /// <param name="indexId">Index ID for the DAT</param>
        /// <param name="statsOnly">True to only add item statistics while parsing, false otherwise</param>
        /// <param name="containsItems">True if there were any items in the array, false otherwise</param>
        private void ConvertDiskArea(Models.SoftwareList.DiskArea[]? diskareas, Part part, Machine machine, string filename, int indexId, bool statsOnly, ref bool containsItems)
        {
            // If the diskarea array is missing, we can't do anything
            if (diskareas == null || !diskareas.Any())
                return;

            foreach (var diskarea in diskareas)
            {
                var item = new DiskArea();
                item.SetName(diskarea.Name);
                item.SetFieldValue<Source?>(DatItem.SourceKey, new Source { Index = indexId, Name = filename });

                item.CopyMachineInformation(machine);
                ConvertDisks(diskarea.Disk, part, item, machine, filename, indexId, statsOnly, ref containsItems);
            }
        }

        /// <summary>
        /// Convert Disk information
        /// </summary>
        /// <param name="disks">Array of deserialized models to convert</param>
        /// <param name="part">Parent Part to use</param>
        /// <param name="diskarea">Parent DiskArea to use</param>
        /// <param name="machine">Prefilled machine to use</param>
        /// <param name="filename">Name of the file to be parsed</param>
        /// <param name="indexId">Index ID for the DAT</param>
        /// <param name="statsOnly">True to only add item statistics while parsing, false otherwise</param>
        /// <param name="containsItems">True if there were any items in the array, false otherwise</param>
        private void ConvertDisks(Models.SoftwareList.Disk[]? disks, Part part, DiskArea diskarea, Machine machine, string filename, int indexId, bool statsOnly, ref bool containsItems)
        {
            // If the rom array is missing, we can't do anything
            if (disks == null || !disks.Any())
                return;

            containsItems = true;
            foreach (var disk in disks)
            {
                var item = new Disk();
                item.SetName(disk.Name);
                item.SetFieldValue<DiskArea?>(Disk.DiskAreaKey, diskarea);
                item.SetFieldValue<ItemStatus>(Models.Metadata.Disk.StatusKey, disk.Status?.AsEnumValue<ItemStatus>() ?? ItemStatus.NULL);
                item.SetFieldValue<string?>(Models.Metadata.Disk.MD5Key, disk.MD5);
                item.SetFieldValue<Part?>(Disk.PartKey, part);
                item.SetFieldValue<string?>(Models.Metadata.Disk.SHA1Key, disk.SHA1);
                item.SetFieldValue<Source?>(DatItem.SourceKey, new Source { Index = indexId, Name = filename });
                item.SetFieldValue<bool?>(Models.Metadata.Disk.WritableKey, disk.Writeable.AsYesNo());

                item.CopyMachineInformation(machine);
                ParseAddHelper(item, statsOnly);
            }
        }

        /// <summary>
        /// Convert DipSwitch information
        /// </summary>
        /// <param name="dipswitches">Array of deserialized models to convert</param>
        /// <param name="part">Parent Part to use</param>
        /// <param name="machine">Prefilled machine to use</param>
        /// <param name="filename">Name of the file to be parsed</param>
        /// <param name="indexId">Index ID for the DAT</param>
        /// <param name="statsOnly">True to only add item statistics while parsing, false otherwise</param>
        /// <param name="containsItems">True if there were any items in the array, false otherwise</param>
        private void ConvertDipSwitch(Models.SoftwareList.DipSwitch[]? dipswitches, Part part, Machine machine, string filename, int indexId, bool statsOnly, ref bool containsItems)
        {
            // If the dipswitch array is missing, we can't do anything
            if (dipswitches == null || !dipswitches.Any())
                return;

            foreach (var dipswitch in dipswitches)
            {
                var item = new DipSwitch();
                item.SetName(dipswitch.Name);
                item.SetFieldValue<DipValue[]?>(Models.Metadata.DipSwitch.DipValueKey, CreateDipValues(dipswitch.DipValue, machine, filename, indexId)?.ToArray());
                item.SetFieldValue<Part?>(DipSwitch.PartKey, part);
                item.SetFieldValue<string?>(Models.Metadata.DipSwitch.MaskKey, dipswitch.Mask);
                item.SetFieldValue<Source?>(DatItem.SourceKey, new Source { Index = indexId, Name = filename });
                item.SetFieldValue<string?>(Models.Metadata.DipSwitch.TagKey, dipswitch.Tag);

                item.CopyMachineInformation(machine);
                ParseAddHelper(item, statsOnly);
            }
        }

        /// <summary>
        /// Convert DipValue information
        /// </summary>
        /// <param name="dipvalues">Array of deserialized models to convert</param>
        /// <param name="machine">Prefilled machine to use</param>
        /// <param name="filename">Name of the file to be parsed</param>
        /// <param name="indexId">Index ID for the DAT</param>
        private static List<DipValue>? CreateDipValues(Models.SoftwareList.DipValue[]? dipvalues, Machine machine, string filename, int indexId)
        {
            // If the feature array is missing, we can't do anything
            if (dipvalues == null || !dipvalues.Any())
                return null;

            var settings = new List<DipValue>();
            foreach (var dipvalue in dipvalues)
            {
                var item = new DipValue();
                item.SetName(dipvalue.Name);
                item.SetFieldValue<bool?>(Models.Metadata.DipValue.DefaultKey, dipvalue.Default.AsYesNo());
                item.SetFieldValue<Source?>(DatItem.SourceKey, new Source { Index = indexId, Name = filename });
                item.SetFieldValue<string?>(Models.Metadata.DipValue.ValueKey, dipvalue.Value);

                item.CopyMachineInformation(machine);
                settings.Add(item);
            }

            return settings;
        }

        #endregion
    }
}