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

using Perforce.Model;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Perforce.ViewModel {
    public class BreadcrumbBarViewModel : ViewModelBase {

        private ObservableCollection<BreadCrumbItem> _breadcrumbItems;

        public void UpdatePath(params ListingItem[] selection) {
            string depotPath = null;
            var isFolder = true;
            if (selection != null) {
                if (selection.Count() == 1) {
                    depotPath = selection[0].DepotPath;
                    isFolder = selection[0].Type.Equals(ListingItem.TYPE.FOLDER);
                } else if (selection.Count() > 1) {
                    depotPath = selection[0].DepotPath;
                    depotPath = depotPath.Substring(0, depotPath.LastIndexOf('/'));
                    isFolder = true;
                }
            }
            if (depotPath == null) depotPath = "/";
            var items = new List<BreadCrumbItem>();
            var parts = depotPath.Split('/');
            var last = depotPath.LastIndexOf('/');
            while (last > 0) {
                var name = depotPath.Substring(last + 1);
                items.Add(new BreadCrumbItem { Label = name, Path = depotPath, IsFolder = isFolder });
                depotPath = depotPath.Substring(0, last);
                last = depotPath.LastIndexOf('/');
                isFolder = true;
            }
            items.Reverse();
            ObservableCollection<BreadCrumbItem> update = new ObservableCollection<BreadCrumbItem>();
            foreach (var item in items) {
                update.Add(item);
            }
            BreadcrumbItems = update;
        }

        public ObservableCollection<BreadCrumbItem> BreadcrumbItems {
            get { return _breadcrumbItems; }
            set {
                _breadcrumbItems = value;
                OnPropertyChanged("BreadcrumbItems");
            }
        }
        
    }

    public class BreadCrumbItem {
        public string Label { get; set; }
        public string Path { get; set; }
        public bool IsFolder { get; set; }
    }
}