using System.IO;
using System.Reflection;
using System.Text;
using Newtonsoft.Json;
using Size = System.Windows.Size;
using Point = System.Windows.Point;

namespace Azaion.Annotator.DTO;

public class Config
{
    private const string CONFIG_PATH = "config.json";
    private const string DEFAULT_VIDEO_DIR = "video";
    private const string DEFAULT_LABELS_DIR = "labels";
    private const string DEFAULT_IMAGES_DIR = "images";
    private static readonly Size DefaultWindowSize = new(1280, 720);
    private static readonly Point DefaultWindowLocation = new(100, 100);
    
    
    public string VideosDirectory { get; set; } = DEFAULT_VIDEO_DIR;
    public string LabelsDirectory { get; set; } = DEFAULT_LABELS_DIR;
    public string ImagesDirectory { get; set; } = DEFAULT_IMAGES_DIR;
    
    public List<AnnotationClass> AnnotationClasses { get; set; } = [];
    public Size WindowSize { get; set; }
    public Point WindowLocation { get; set; }
    public bool ShowHelpOnStart { get; set; }

    public void Save()
    {
        File.WriteAllText(CONFIG_PATH, JsonConvert.SerializeObject(this, Formatting.Indented), Encoding.UTF8);
    }
    
    public static Config Read()
    {
        string configFilePath = Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location), CONFIG_PATH);

        if (!File.Exists(configFilePath))
        {
            var exePath = Path.GetDirectoryName(AppDomain.CurrentDomain.BaseDirectory)!;
            return new Config
            {
                VideosDirectory = Path.Combine(exePath, DEFAULT_VIDEO_DIR),
                LabelsDirectory = Path.Combine(exePath, DEFAULT_LABELS_DIR),
                ImagesDirectory = Path.Combine(exePath, DEFAULT_IMAGES_DIR),
                WindowLocation = DefaultWindowLocation,
                WindowSize = DefaultWindowSize,
                ShowHelpOnStart = true
            };
        }
        try
        {
            var str = File.ReadAllText(CONFIG_PATH);
            return JsonConvert.DeserializeObject<Config>(str) ?? new Config();
        }
        catch (Exception)
        {
            return new Config();
        }
    }
}