//
// Copyright 2014 Perforce Software Inc.
//

using Perforce.Helper;
using Perforce.P4;
using System.Collections.Generic;
using System.Windows.Documents;
using System.Linq;
using System;

namespace Perforce.ViewModel {
    public class SubmitFormViewModel : ViewModelBase {

        public SubmitFormViewModel(int changeId = 0, string[] selected = null) {
            var helper = Utility.GetPerforceHelper();
            if (changeId == 0) {
                _change = helper.GetOrCreatePendingChangelist();
            } else {
                _change = helper.GetChangelist(changeId);
            }
            _changelistFiles = new List<ChangelistFile>();
            if (_change.Files != null) {
                foreach (var f in _change.Files) {
                    var isSelected = false;
                    if (selected != null) {
                        if (selected.Contains(f.DepotPath.Path)) {
                            isSelected = true;
                        }
                    } else {
                        isSelected = true;
                    }
                    var file = new ChangelistFile {
                        Selected = isSelected,
                        Filename = f.GetFileName(),
                        Path = f.DepotPath.Path,
                        Action = f.Action
                    };
                    _changelistFiles.Add(file);
                }
                // sort the changelist files
                _changelistFiles.Sort();
            }
            
        }

        private Changelist _change;

        public void RefreshAll() {
            OnPropertyChanged(string.Empty);
        }

        public Changelist Changelist {
            get { return _change; }
            set {
                _change = value;
                OnPropertyChanged(string.Empty);
            }
        }

        public string Description {
            get {
                var description = string.Empty;
                if (!_change.Description.Trim().Equals(Constants.GENERATED_CHANGELIST_DESCRIPTION)) {
                    description = _change.Description;
                }
                return description;
            }
            set {
                _change.Description = value;
                OnPropertyChanged("Description");
            }
        }

        private List<ChangelistFile> _changelistFiles;
        public List<ChangelistFile> ChangelistFiles {
            get {
                return _changelistFiles;
            }
            set {
                _changelistFiles = value;
                OnPropertyChanged("ChangelistFiles");
            }
        }
    }

    public class ChangelistFile : ViewModelBase, IComparable {
        private bool _selected;
        public bool Selected {
            get { return _selected; }
            set {
                _selected = value;
                OnPropertyChanged("Selected");
            }
        }
        public string Filename { get; set; }
        public string Path { get; set; }
        public FileAction Action { get; set; }

        public int CompareTo(object o) {
            var other = o as ChangelistFile;
            if (Selected == other.Selected) {
                return Path.ToLowerInvariant().CompareTo(other.Path.ToLowerInvariant());
            } else {
                if (Selected) {
                    return -1;
                } else {
                    return 1;
                }
            }
        }
    }
}