using System.Text;
using System.Xml.Serialization;
using PluginLoader.Data;

namespace PluginLoader;

public class PluginConfig
{
    private const string fileName = "config.xml";

    [XmlIgnore] public readonly Dictionary<string, Profile> ProfileMap = new();

    private string filePath;

    private int networkTimeout = 5000;

    [XmlArray]
    [XmlArrayItem("Id")]
    public string[] Plugins
    {
        get => EnabledPlugins.ToArray();
        set => EnabledPlugins = new(value);
    }

    [XmlIgnore] public HashSet<string> EnabledPlugins { get; private set; } = new();

    [XmlArray]
    [XmlArrayItem("Plugin")]
    public LocalFolderPlugin.Config[] LocalFolderPlugins
    {
        get => PluginFolders.Values.ToArray();
        set { PluginFolders = value.ToDictionary(x => x.Folder); }
    }

    [XmlIgnore] public Dictionary<string, LocalFolderPlugin.Config> PluginFolders { get; private set; } = new();

    [XmlArray]
    [XmlArrayItem("Profile")]
    public Profile[] Profiles
    {
        get => ProfileMap.Values.ToArray();
        set
        {
            ProfileMap.Clear();
            foreach (var profile in value)
                ProfileMap[profile.Key] = profile;
        }
    }

    public string ListHash { get; set; }

    // Base URL for the statistics server, change to http://localhost:5000 in config.xml for local development
    // ReSharper disable once UnassignedGetOnlyAutoProperty
    public string StatsServerBaseUrl { get; }

    // User consent to use the StatsServer
    public bool DataHandlingConsent { get; set; }
    public string DataHandlingConsentDate { get; set; }

    public int NetworkTimeout
    {
        get => networkTimeout;
        set
        {
            if (value < 100)
                networkTimeout = 100;
            else if (value > 60000)
                networkTimeout = 60000;
            else
                networkTimeout = value;
        }
    }

    public int Count => EnabledPlugins.Count;

    public void Init(PluginList plugins)
    {
        // Remove plugins from config that no longer exist
        var toRemove = new List<string>();

        var sb = new StringBuilder("Enabled plugins: ");
        foreach (var id in EnabledPlugins)
            if (!plugins.Contains(id))
            {
                LogFile.WriteLine($"{id} was in the config but is no longer available");
                toRemove.Add(id);
            }
            else
            {
                sb.Append(id).Append(", ");
            }

        if (EnabledPlugins.Count > 0)
            sb.Length -= 2;
        else
            sb.Append("None");
        LogFile.WriteLine(sb.ToString());


        foreach (var id in toRemove)
            EnabledPlugins.Remove(id);

        if (toRemove.Count > 0)
            Save();
    }

    public void Disable()
    {
        EnabledPlugins.Clear();
    }


    public void Save()
    {
        try
        {
            LogFile.WriteLine("Saving config");
            var serializer = new XmlSerializer(typeof(PluginConfig));
            if (File.Exists(filePath))
                File.Delete(filePath);
            var fs = File.OpenWrite(filePath);
            serializer.Serialize(fs, this);
            fs.Flush();
            fs.Close();
        }
        catch (Exception e)
        {
            LogFile.WriteLine("An error occurred while saving plugin config: " + e);
        }
    }

    public static PluginConfig Load(string mainDirectory)
    {
        var path = Path.Combine(mainDirectory, fileName);
        if (File.Exists(path))
            try
            {
                var serializer = new XmlSerializer(typeof(PluginConfig));
                var fs = File.OpenRead(path);
                var config = (PluginConfig)serializer.Deserialize(fs);
                fs.Close();
                config.filePath = path;
                return config;
            }
            catch (Exception e)
            {
                LogFile.WriteLine("An error occurred while loading plugin config: " + e);
            }

        return new()
        {
            filePath = path
        };
    }

    public IEnumerator<string> GetEnumerator()
    {
        return EnabledPlugins.GetEnumerator();
    }

    public bool IsEnabled(string id)
    {
        return EnabledPlugins.Contains(id);
    }

    public void SetEnabled(string id, bool enabled)
    {
        if (EnabledPlugins.Contains(id) == enabled)
            return;

        if (enabled)
        {
            EnabledPlugins.Add(id);
            Main.Instance.List.SubscribeToItem(id);
        }
        else
        {
            EnabledPlugins.Remove(id);
        }
    }
}