using System;
using System.Collections.Generic;

using Avalonia;

using BFR.DataModels;

namespace BFR.Operations
{
    public abstract class Operation : AvaloniaObject
    {
        // Needs to be an avalonia property to update the UI with with any potential error.
        public AvaloniaProperty<string> errorProperty = AvaloniaProperty.Register<Operation, string>(nameof(Error), defaultValue: "");
        public string Error { get => GetValue(errorProperty); set => SetValue(errorProperty, value); }
        public bool IsEnabled { get; set; } = true;
        public abstract string Name { get; }
        public abstract string Description { get; }
        public abstract OperationType OperationType { get; }

        protected abstract void ApplyToInternal(List<FileModel> files);
        
        // Updates the UI with the appropriate error if the operation fails
        public void ApplyTo(List<FileModel> files)
        {
            try { ApplyToInternal(files); Error = ""; }
            catch (Exception e) { Error = e.Message; }
        }
    }
}