using System.Text;
using System.Text.Json.Serialization;
using DataModel.Database.Common;
using Microsoft.AspNetCore.Components;

namespace UI_MAUI.Pages;

public partial class LoadProject
{
    private readonly List<RecentProject> recentProjects = new();

    [Inject]
    public DataContextFactory DataContextFactory { get; set; }
    
    private string newProjectName = string.Empty;
    private string newProjectDestination = string.Empty;

    #region Overrides of ComponentBase

    protected override async Task OnInitializedAsync()
    {
        await base.OnInitializedAsync();
        await this.LoadRecentProjects();
    }

    #endregion

    private readonly record struct RecentProject(string Path, string Name, bool Available);

    private async Task LoadRecentProjects()
    {
        var appDataDirectory = FileSystem.Current.AppDataDirectory;
        var recentProjectsFile = Path.Join(appDataDirectory, "recentProjects.json");
        if (!File.Exists(recentProjectsFile))
            await File.WriteAllTextAsync(recentProjectsFile, string.Empty, Encoding.UTF8);

        // Read the JSON data from that file & decode it to an array of recent projects:
    }

    private async Task WriteRecentProjects()
    {

    }

    private Task ChooseProjectDestination()
    {
        try
        {
#if WINDOWS
            return this.ChooseProjectDestinationWindows();
#elif MACCATALYST
            return this.ChooseProjectDestinationMacOS();
#else
            return Task.CompletedTask;
#endif
        }
        finally
        {
            this.StateHasChanged();
        }
    }

    private Task CreateProject()
    {
        // TODO: Need to wait for the project to be created. Afterwards, we need to close the dialog. Meanwhile, we need to show a loading indicator.
        #warning TODO: Create project
        
#if WINDOWS
        return this.CreateProjectWindows();
#elif MACCATALYST
        return Task.CompletedTask;
#else
        return Task.CompletedTask;
#endif
    }

    private bool CannotCreateProject()
    {
        if (DeviceInfo.Idiom == DeviceIdiom.Desktop)
            return string.IsNullOrWhiteSpace(this.newProjectName) || string.IsNullOrWhiteSpace(this.newProjectDestination);
        else if (DeviceInfo.Idiom == DeviceIdiom.Phone || DeviceInfo.Idiom == DeviceIdiom.Tablet)
            return string.IsNullOrWhiteSpace(this.newProjectName);
        else
            return true;
    }
    
    private void ReevaluateState() => this.StateHasChanged();
}