using System.Collections.Generic;
using System.Threading.Tasks;

namespace SourceGit.ViewModels {
    public class DiscardModeAll { }
    public class DiscardModeSingle { public string File { get; set; } }
    public class DiscardModeMulti { public int Count { get; set; } }

    public class Discard : Popup {

        public object Mode {
            get;
            private set;
        }

        public Discard(Repository repo, List<Models.Change> changes = null) {
            _repo = repo;
            _changes = changes;

            if (_changes == null) {
                Mode = new DiscardModeAll();
            } else if (_changes.Count == 1) {
                Mode = new DiscardModeSingle() { File = _changes[0].Path };
            } else {
                Mode = new DiscardModeMulti() { Count = _changes.Count };
            }

            View = new Views.Discard() { DataContext = this };
        }

        public override Task<bool> Sure() {
            _repo.SetWatcherEnabled(false);
            return Task.Run(() => {
                if (_changes == null) {
                    SetProgressDescription("Discard all local changes ...");
                    Commands.Discard.All(_repo.FullPath);
                } else {
                    SetProgressDescription($"Discard total {_changes.Count} changes ...");
                    Commands.Discard.Changes(_repo.FullPath, _changes);
                }

                CallUIThread(() => _repo.SetWatcherEnabled(true));
                return true;
            });
        }

        private Repository _repo = null;
        private List<Models.Change> _changes = null;
    }
}