using System;
using System.Collections.ObjectModel;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
using Avalonia;
using Avalonia.Media;
using Avalonia.Platform.Storage;

using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using CommunityToolkit.Mvvm.Messaging;
using CrossLangDevStudio.Messages;
using CrossLangDevStudio.Views;
using MsBox.Avalonia;
using Newtonsoft.Json;

namespace CrossLangDevStudio.ViewModels;


public partial class AddProjectReferenceViewModel : ViewModelBase
{
    public AddProjectReferenceViewModel(string projectDir)
    {
        ProjectDirectory = projectDir;
        var data = File.ReadAllText(Path.Combine(projectDir, "cross.json"));
        var jsonData = JsonConvert.DeserializeObject<CrossLangConfig>(data) ?? new CrossLangConfig();
        foreach (var item in jsonData.ProjectDependencies)
            References.Add(new ProjectReferenceEntry(this, item));
    }
    public string ProjectDirectory { get; init; }
    public ObservableCollection<ProjectReferenceEntry> References { get; } = new ObservableCollection<ProjectReferenceEntry>();

    public void Remove(ProjectReferenceEntry projectReferenceEntry)
    {
        References.Remove(projectReferenceEntry);
        var data = File.ReadAllText(Path.Combine(ProjectDirectory, "cross.json"));
        var jsonData = JsonConvert.DeserializeObject<CrossLangConfig>(data) ?? new CrossLangConfig();
        jsonData.ProjectDependencies.Remove(projectReferenceEntry.Path);
        File.WriteAllText(Path.Combine(ProjectDirectory, "cross.json"), JsonConvert.SerializeObject(jsonData, Formatting.Indented, new JsonSerializerSettings() { NullValueHandling = NullValueHandling.Ignore }));
                
    }

    [RelayCommand]
    private async Task AddProjectAsync()
    {
        var window = await WeakReferenceMessenger.Default.Send<GetWindowMessage>();
        var dir = await window.StorageProvider.OpenFolderPickerAsync(new FolderPickerOpenOptions() { Title = "Add Project Dependency" });
        if (dir.Count != 0)
        {
            string? path = dir[0].TryGetLocalPath();
            if (!string.IsNullOrWhiteSpace(path))
            {
                var jsonFile = Path.Combine(path, "cross.json");
                if (!File.Exists(jsonFile))
                {
                    await MessageBoxManager.GetMessageBoxStandard("Error", $"Could not find cross.json in folder {path}", MsBox.Avalonia.Enums.ButtonEnum.Ok, MsBox.Avalonia.Enums.Icon.Error).ShowAsync();
                    return;
                }
                string projectPath = Path.GetRelativePath(this.ProjectDirectory, path);
                var abs = Path.GetFullPath(projectPath, ProjectDirectory);

                foreach (var item in References)
                {
                    if (Path.GetFullPath(item.Path, ProjectDirectory) == abs)
                    {
                        await MessageBoxManager.GetMessageBoxStandard("Error", $"Project {path} already exists in your project.", MsBox.Avalonia.Enums.ButtonEnum.Ok, MsBox.Avalonia.Enums.Icon.Error).ShowAsync();

                        return;
                    }
                }
                var data = File.ReadAllText(Path.Combine(ProjectDirectory, "cross.json"));
                var jsonData = JsonConvert.DeserializeObject<CrossLangConfig>(data) ?? new CrossLangConfig();
                jsonData.ProjectDependencies.Add(projectPath);
                File.WriteAllText(Path.Combine(ProjectDirectory, "cross.json"), JsonConvert.SerializeObject(jsonData, Formatting.Indented, new JsonSerializerSettings() { NullValueHandling = NullValueHandling.Ignore }));
                References.Add(new ProjectReferenceEntry(this, projectPath));
            }
            
        }
    }
}

public partial class ProjectReferenceEntry(AddProjectReferenceViewModel parent,string path) : ObservableObject
{
    public string Path => path;

    [RelayCommand]
    private void Remove()
    {
        parent.Remove(this);
    }
}