using System.ComponentModel;
using System.IO;
using System.Runtime.CompilerServices;
using GifResizer.Models;
using GifResizer.Service;

namespace GifResizer.ViewModels;

public class MainViewModel : INotifyPropertyChanged
{
    
    private readonly ResizeService _resizeService;
    public event PropertyChangedEventHandler? PropertyChanged;
    
    public MainViewModel(ResizeService service)
    {
        _resizeService = service;
        FilePath = Directory.GetCurrentDirectory();
    }


    public string FilePath
    {
        get;
        set => SetField(ref field, value);
    }

    public void ResizeGif(int width, int height)
    {
        _resizeService.ResizeGif(FilePath, width, height);
    }
    
    private bool SetField<T>(ref T field, T value, [CallerMemberName] string? propertyName = null)
    {
        if (EqualityComparer<T>.Default.Equals(field, value)) return false;
        field = value;
        OnPropertyChanged(propertyName);
        return true;
    }
    
    protected virtual void OnPropertyChanged([CallerMemberName] string? propertyName = null)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
}