using System;
using System.Collections.Generic;
using System.IO;
using System.Runtime.Serialization;
using System.Xml;
using SlamCross.Models;

namespace SlamCross.Services;

public static class TrackSettingsService
{
    public static void Save(SourceGame game)
    {
        var settingsFile = Path.Combine(game.LibraryName, "TrackSettings.xml");
        var toSave = new List<Track>();

        foreach (var t in game.Tracks)
        {
            if (!string.IsNullOrEmpty(t.Hotkey) || t.Volume != 100 || t.EndPos > 0)
                toSave.Add(t);
        }

        if (toSave.Count > 0)
        {
            var serializer = new DataContractSerializer(typeof(List<Track>));
            using var writer = new StreamWriter(settingsFile);
            using var xml = new XmlTextWriter(writer);
            serializer.WriteObject(xml, toSave);
        }
        else if (File.Exists(settingsFile))
        {
            File.Delete(settingsFile);
        }
    }

    public static void Load(SourceGame game)
    {
        var settingsFile = Path.Combine(game.LibraryName, "TrackSettings.xml");
        if (!File.Exists(settingsFile)) return;

        List<Track> saved;
        try
        {
            var serializer = new DataContractSerializer(typeof(List<Track>));
            using var reader = new StreamReader(settingsFile);
            using var xml = new XmlTextReader(reader);
            saved = (List<Track>)serializer.ReadObject(xml)! ?? new List<Track>();
        }
        catch { return; }

        foreach (var track in game.Tracks)
        {
            foreach (var s in saved)
            {
                if (track.Name == s.Name)
                {
                    track.Hotkey = s.Hotkey;
                    track.Volume = s.Volume;
                    track.StartPos = s.StartPos;
                    track.EndPos = s.EndPos;
                }
            }
        }
    }
}