using System.Collections.Generic;
using System.IO;

using SabreTools.Library.Data;
using SabreTools.Library.DatFiles;
using SabreTools.Library.Help;
using SabreTools.Library.Tools;

namespace RombaSharp.Features
{
    internal class Dir2Dat : BaseFeature
    {
        public const string Value = "Dir2Dat";

        public Dir2Dat()
        {
            Name = Value;
            Flags = new List<string>() { "dir2dat" };
            Description = "Creates a DAT file for the specified input directory and saves it to the -out filename.";
            _featureType = FeatureType.Flag;
            LongDescription = "Creates a DAT file for the specified input directory and saves it to the -out filename.";
            Features = new Dictionary<string, Feature>();

            AddFeature(OutStringInput);
            AddFeature(SourceStringInput);
            AddFeature(NameStringInput); // Defaults to "untitled"
            AddFeature(DescriptionStringInput);
        }

        public override void ProcessFeatures(Dictionary<string, Feature> features)
        {
            base.ProcessFeatures(features);

            // Get feature flags
            string name = GetString(features, NameStringValue);
            string description = GetString(features, DescriptionStringValue);
            string source = GetString(features, SourceStringValue);
            string outdat = GetString(features, OutStringValue);

            // Ensure the output directory
            DirectoryExtensions.Ensure(outdat, create: true);

            // Check that all required directories exist
            if (!Directory.Exists(source))
            {
                Globals.Logger.Error($"File '{source}' does not exist!");
                return;
            }

            // Create the encapsulating datfile
            DatFile datfile = DatFile.Create();
            datfile.Header.Name = string.IsNullOrWhiteSpace(name) ? "untitled" : name;
            datfile.Header.Description = description;

            // Now run the D2D on the input and write out
            // TODO: All instances of Hash.DeepHashes should be made into 0x0 eventually
            datfile.PopulateFromDir(source, Hash.DeepHashes, true /* bare */, false /* archivesAsFiles */, SkipFileType.None, false /* addBlanks */,
                false /* addDate */, _tmpdir, false /* copyFiles */, null /* headerToCheckAgainst */, true /* chdsAsFiles */, null /* filter */);
            datfile.Write(outDir: outdat);
        }
    }
}