using System;
using System.IO;
using System.Collections.ObjectModel;
using System.Threading.Tasks;
using System.Web;
using Avalonia.Controls;
using Avalonia.Platform.Storage;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using CommunityToolkit.Mvvm.Messaging;
using GazpromApp.Messages;
using GazpromApp.Models;
using GazpromApp.Utils;

namespace GazpromApp.ViewModels;

public partial class MainWindowViewModel : ViewModelBase
{
    public ObservableCollection<PointViewModel> Points { get; }

    [RelayCommand]
    private async Task AddPoint()
    {
        var point = await WeakReferenceMessenger.Default.Send(new NewPointMessage());
        
        if (point != null)
            Points.Add(point);
        
        IsLineVisible = Points.Count > 0;
    }

    [RelayCommand]
    private async Task EditPoint(PointViewModel point)
    {
        var p = await WeakReferenceMessenger.Default.Send(new EditPointMessage(point)) ?? point;
        Points[Points.IndexOf(point)] = p;
    }

    [RelayCommand]
    private void RemovePoint(PointViewModel point)
    {
        Points.Remove(point);
        
        IsLineVisible = Points.Count > 0;
    }

    [RelayCommand]
    private void ImportPoint(Window w)
    {
        
    }

    [RelayCommand]
    private async Task ExportPoint(Window w)
    {
        var folder = await w.StorageProvider.OpenFolderPickerAsync(new FolderPickerOpenOptions()
        {
            AllowMultiple = false,
            SuggestedStartLocation =
                await w.StorageProvider.TryGetFolderFromPathAsync(
                    Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments))
        });
        foreach (var point in Points)
        {
            DataSerialization.SavePoint(point.GetPoint(), Path.Combine(HttpUtility.HtmlDecode(folder[0].Path.AbsolutePath), point.Name + ".json") );
        }
    }
    
    // Visual properties
    
    [ObservableProperty]
    private bool _isLineVisible;

    public MainWindowViewModel()
    {
        if (Design.IsDesignMode)
            Points = [new PointViewModel(new Point()) { Name = "Name test", Description = "Description test" }];
        else Points = [];
    }
}