using Sharp.Augeas;

namespace CodeLiturgy.Views.Augeas
{
    public class AugeasManager
    {
        private readonly Sharp.Augeas.Augeas _augeas;
        
        private AugSettings _augSettings;

        public List<string> CurrentApacheConfigurations => _currentApacheConfigurations;

        private List<string> _currentApacheConfigurations;

        private const string _apachePath = "/etc/apache2/sites-available";
        

        public AugeasManager()
        {
            _augSettings = AugeasExtensions.GetSettings();
            _augeas = new Sharp.Augeas.Augeas(_augSettings);
            RefreshApacheConfigurations();
        }
        
        public string GetPreview(string site) 
        {
            
            if (!_currentApacheConfigurations.Contains(site))
            {
                return string.Empty;
            }

            var siteFullPath = $"{_apachePath}/{site}";
            _augeas.LoadFile(siteFullPath);
            var preview = _augeas.GetPreview($"/files{siteFullPath}");
            return preview;
        }

        public List<string> GetApacheAvailableConfigurations(int skip, int take)
        {
            var result =  _currentApacheConfigurations
                .Skip(skip)
                .Take(take)
                .ToList();
            
            return _currentApacheConfigurations;

        }

        public SuperNode GetVirtualHostTree(string site)
        {
            if (!_currentApacheConfigurations.Contains(site))
            {
                return null;
            }
            
            var siteFullPath = $"{_apachePath}/{site}";
            _augeas.LoadFile(siteFullPath);
            var tree = _augeas.GetTree("VirtualHost",$"/files{siteFullPath}/VirtualHost/*");
            return tree;
        }
        
        
        private void RefreshApacheConfigurations()
        {
            var apacheDir = _augSettings.root + _apachePath;
            DirectoryInfo d = new DirectoryInfo(apacheDir);

            FileInfo[] files = d.GetFiles("*.conf");

            var result =  files
                .Select(x => x.Name)
                .ToList();

            _currentApacheConfigurations = result;
        }
    }
}