using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reactive.Linq;
using System.Text.Json;
using System.Windows.Input;
using Avalonia.Media;
using ReactiveUI;
using VaultSmpInstaller.Data;

namespace VaultSmpInstaller.ViewModels;

public class MainWindowViewModel : ReactiveObject
{
    public static Brush Background => SolidColorBrush.Parse("#282A36");
    public static Brush SecondaryBackground => SolidColorBrush.Parse("#44475A");
    public static Brush ButtonBackground => SolidColorBrush.Parse("#6272A4");
    public static Brush TextColor => SolidColorBrush.Parse("#F8F8F2");

    public Interaction<ProfileWindow1ViewModel, ProfileWindow2ViewModel.InstanceInfo?> ShowProfileSelectionDialog { get; }
    
    public ICommand SelectProfileCommand { get; }
    
    public MainWindowViewModel()
    {
        ShowProfileSelectionDialog = new Interaction<ProfileWindow1ViewModel, ProfileWindow2ViewModel.InstanceInfo?>();
        
        SelectProfileCommand = ReactiveCommand.CreateFromTask(async () =>
        {
            var profileWindowModel = new ProfileWindow1ViewModel();
            SelectedInstance = await ShowProfileSelectionDialog.Handle(profileWindowModel);
            
            this.RaisePropertyChanged(nameof(SelectedInstanceName));
            this.RaisePropertyChanged(nameof(SelectedInstance));
            this.RaisePropertyChanged(nameof(IsInstanceSelected));

            if (SelectedInstance != null)
            {
                if (File.Exists(Path.Combine(SelectedInstance.InstancePath, "installedInstance.json")))
                {
                    await using FileStream fs = new FileStream(Path.Combine(SelectedInstance.InstancePath, "installedInstance.json"), FileMode.Open);
                    InstalledInstanceConfig = await JsonSerializer.DeserializeAsync(fs, JsonContext.Default.InstanceConfig);
                    if (InstalledInstanceConfig != null)
                    {
                        InstalledInstanceConfig.InstancePath = SelectedInstance.InstancePath;
                        InstalledVersion = InstalledInstanceConfig.Version;
                    }
                }
                else
                {
                    InstalledInstanceConfig = null;
                    InstalledVersion = "None";
                }
                this.RaisePropertyChanged(nameof(InstalledInstanceConfig));
                this.RaisePropertyChanged(nameof(InstalledVersion));
                this.RaisePropertyChanged(nameof(InstalledModProfiles));
                this.RaisePropertyChanged(nameof(InstalledModProfileNames));
            }
        });
    }

    public InstanceConfig? InstalledInstanceConfig { get; set; }
    public InstanceConfig? LatestInstanceConfig { get; set; }

    public Dictionary<string, ModProfile> EnabledModProfiles => LatestInstanceConfig?.ModProfiles.Where(pair => pair.Value.IsEnabled).ToDictionary() ?? new Dictionary<string, ModProfile>();
    public List<string> EnabledModProfileNames => EnabledModProfiles.Keys.ToList();
    public Dictionary<string, ModProfile> DisabledModProfiles => LatestInstanceConfig?.ModProfiles.Where(pair => !pair.Value.IsEnabled).ToDictionary() ?? new Dictionary<string, ModProfile>();
    public List<string> DisabledModProfileNames => DisabledModProfiles.Keys.ToList(); 
    
    public Dictionary<string, ModProfile> InstalledModProfiles => InstalledInstanceConfig?.ModProfiles.Where(pair => pair.Value.IsEnabled).ToDictionary() ?? new Dictionary<string, ModProfile>();
    public List<string> InstalledModProfileNames => InstalledModProfiles.Keys.ToList();

    public string SelectedInstanceName => SelectedInstance == null ? "No profile selected" : $"Selected Profile: {SelectedInstance.InstanceName}";
    public ProfileWindow2ViewModel.InstanceInfo? SelectedInstance { get; set; }


    private string _installedVersion = "None";
    public string InstalledVersion
    {
        set
        {
            _installedVersion = value;
            this.RaisePropertyChanged(nameof(IsLatestVersionText));
            this.RaisePropertyChanged();
        }

        get => _installedVersion;
    }
    
    private string _latestVersion = "Downloading";
    public string LatestVersion
    {
        set
        {
            _latestVersion = value;
            this.RaisePropertyChanged(nameof(IsLatestVersionText));
            this.RaisePropertyChanged();
        }

        get => _latestVersion;
    }
    public string IsLatestVersionText => InstalledVersion == LatestVersion ? "the latest version!" : "an outdated version.";
    public bool IsInstanceSelected => SelectedInstance != null;
}