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using PKISharp.WACS.DomainObjects;
using PKISharp.WACS.Extensions;
using PKISharp.WACS.Plugins.Interfaces;
using PKISharp.WACS.Services;
using System;
using System.IO;
using System.Security.Cryptography.X509Certificates;
using System.Threading.Tasks;

namespace PKISharp.WACS.Plugins.StorePlugins
{
    internal class PfxFile : IStorePlugin
    {
        private readonly ILogService _log;
        private readonly string _path;
        private readonly string? _password;

        public PfxFile(ILogService log, ISettingsService settings, PfxFileOptions options)
        {
            _log = log;

            _password = !string.IsNullOrWhiteSpace(options.PfxPassword?.Value) ? 
                options.PfxPassword.Value : 
                settings.Store.PfxFile?.DefaultPassword;

            var path = !string.IsNullOrWhiteSpace(options.Path) ? 
                options.Path :
                settings.Store.PfxFile?.DefaultPath;

            if (path != null && path.ValidPath(log))
            {
                _path = path;
                _log.Debug("Using pfx file path: {_path}", _path);
            }
            else
            {
                throw new Exception($"Specified pfx file path {path} is not valid.");
            }
        }

        private string PathForIdentifier(string identifier) => Path.Combine(_path, $"{identifier.Replace("*", "_")}.pfx");

        public async Task Save(CertificateInfo input)
        {
            _log.Information("Copying certificate to the pfx folder");
            var dest = PathForIdentifier(input.CommonName);
            try
            {
                var collection = new X509Certificate2Collection
                {
                    input.Certificate
                };
                collection.AddRange(input.Chain.ToArray());
                await File.WriteAllBytesAsync(dest, collection.Export(X509ContentType.Pfx, _password));
            }
            catch (Exception ex)
            {
                _log.Error(ex, "Error copying certificate to pfx path");
            }
            input.StoreInfo.TryAdd(
                GetType(),
                new StoreInfo()
                {
                    Name = PfxFileOptions.PluginName,
                    Path = _path
                });
        }

        public Task Delete(CertificateInfo input) => Task.CompletedTask;

        (bool, string?) IPlugin.Disabled => (false, null);
    }
}