using System;
using System.ComponentModel;
using System.Windows.Input;

namespace Tasklight.Controller
{
    public abstract class ModelBase : PropertyChangedBase
    {
        public void SetProperty<T>(ref T storage, T value, string name)
        {
            //if (storage == null)
            //throw new InvalidCastException("osrs_toolbox.ModelBase.UpdateProperty\nStorage cannot be null.");
            if (value == null)
                throw new InvalidCastException("ModelBase.UpdateProperty\nValue cannot be null.");
            //if (storage.GetType() != value.GetType())
            //throw new InvalidCastException("osrs_toolbox.ModelBase.UpdateProperty\nVariable type mismatch between storage and value.");
            storage = value;
            OnPropertyChanged(name);
        }
    }

    public abstract class PropertyChangedBase : INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;
        public void OnPropertyChanged(string name) => PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(name));
    }

    public class RelayCommand : ICommand
    {
        private Action<object> execute;
        private Func<object, bool>? canExecute;


        public event EventHandler? CanExecuteChanged
        {
            add { CommandManager.RequerySuggested += value; }
            remove { CommandManager.RequerySuggested -= value; }
        }

        public RelayCommand(Action<object> execute, Func<object, bool>? canExecute = null)
        {
            this.execute = execute;
            this.canExecute = canExecute;
        }

        public bool CanExecute(object? parameter)
        {
            return this.canExecute == null || this.canExecute(parameter);
        }

        public void Execute(object? parameter)
        {
            this.execute(parameter);
        }
    }
}