using System.Collections.Generic;
using System.Linq;
using UAF.Perforce;
using UAF.Perforce.Requests;
using UAF.WPF.Commands;

namespace DataFileAnalyzer.Commands
{
    public class OpenForDeleteCommand : BaseCommand
    {
        public override bool CanExecute(object parameter)
        {
            DataFileAnalyzerModel model = parameter as DataFileAnalyzerModel;
            if (model != null)
            {
                if (!model.IsPerforceEnabled)
                    return false;

                if (model.SelectedFile != null)
                {
                    switch (model.ActiveView)
                    {
                        case DataFileAnalyzerModel.FocusedView.FileView:
                            return true;

                        case DataFileAnalyzerModel.FocusedView.ReferencedByMeView:
                            if (model.SelectedFile.Children.Where(dependency => dependency.IsSelected).Count() > 0)
                                return true;
                            else
                                return false;

                        case DataFileAnalyzerModel.FocusedView.ReferencingMeView:
                            if (model.SelectedFile.Parents.Where(dependency => dependency.IsSelected).Count() > 0)
                                return true;
                            else
                                return false;

                        default:
                            return false;
                    }
                }
            }

            return false;
        }

        public override void Execute(object parameter)
        {
            DataFileAnalyzerModel model = parameter as DataFileAnalyzerModel;
            if (model != null && model.SelectedFile != null && model.IsPerforceEnabled)
            {
                IEnumerable<string> filesToDelete = null;
                string dataFolder = UAF.ProjectManager.Instance.CurrentProject.DataPath;

                if (model.ActiveView == DataFileAnalyzerModel.FocusedView.FileView)
                {
                    filesToDelete = model.SelectedFiles.Select(file => dataFolder + file.NormalizedPath);
                }
                else if (model.ActiveView == DataFileAnalyzerModel.FocusedView.ReferencedByMeView)
                {
                    filesToDelete = model.SelectedFile.Children.Where(dependency => dependency.IsSelected).Select(dep => dataFolder + dep.Path.Replace('/', '\\'));
                }
                else if (model.ActiveView == DataFileAnalyzerModel.FocusedView.ReferencingMeView)
                {
                    filesToDelete = model.SelectedFile.Parents.Where(dependency => dependency.IsSelected).Select(dep => dataFolder + dep.Path.Replace('/', '\\'));
                }

                if (filesToDelete != null)
                {
                    PerforceDeleteRequest deleteRequest = new PerforceDeleteRequest();
                    deleteRequest.AddFiles(filesToDelete);
                    PerforceManager.Instance.SendRequest(deleteRequest);
                }
            }
        }
    }
}