using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using SQLVision.Core.Enums;
using SQLVision.Core.Interfaces;
using SQLVision.Core.Models;
using System.Reflection;

namespace SQLVision.Services.Services;

public class PluginManager : IPluginManager
{
    private readonly ILogger<PluginManager> _logger;
    private readonly IServiceProvider _serviceProvider;
    private readonly List<ISqlVisionPlugin> _plugins = new();

    public PluginManager(ILogger<PluginManager> logger, IServiceProvider serviceProvider)
    {
        _logger = logger;
        _serviceProvider = serviceProvider;
    }

    public void LoadPlugins(string pluginsDirectory)
    {
        if (!Directory.Exists(pluginsDirectory))
        {
            Directory.CreateDirectory(pluginsDirectory);
            _logger.LogInformation("Created plugins directory: {Directory}", pluginsDirectory);
            return;
        }

        var pluginFiles = Directory.GetFiles(pluginsDirectory, "*.dll");
        _logger.LogInformation("Found {Count} plugin files", pluginFiles.Length);

        foreach (var pluginFile in pluginFiles)
        {
            try
            {
                var assembly = Assembly.LoadFrom(pluginFile);
                var pluginTypes = assembly.GetTypes()
                    .Where(t => typeof(ISqlVisionPlugin).IsAssignableFrom(t) && !t.IsInterface && !t.IsAbstract);

                foreach (var pluginType in pluginTypes)
                {
                    try
                    {
                        var plugin = (ISqlVisionPlugin)Activator.CreateInstance(pluginType)!;
                        var context = new PluginContext(_serviceProvider);
                        plugin.InitializeAsync(context).Wait();
                        _plugins.Add(plugin);
                        _logger.LogInformation("Loaded plugin: {Name} v{Version}", plugin.Name, plugin.Version);
                    }
                    catch (Exception ex)
                    {
                        _logger.LogError(ex, "Failed to initialize plugin from type {Type}", pluginType.FullName);
                    }
                }
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Failed to load plugin from {File}", pluginFile);
            }
        }
    }

    public IEnumerable<ISqlVisionPlugin> GetPlugins() => _plugins.AsReadOnly();

    public T? GetPlugin<T>() where T : ISqlVisionPlugin
        => _plugins.OfType<T>().FirstOrDefault();

    public async Task BeforeExecutionAsync(ScriptMetadata script, Dictionary<string, object> parameters)
    {
        foreach (var plugin in _plugins)
        {
            try
            {
                await plugin.InitializeAsync(new PluginContext(_serviceProvider));
                // TODO: Добавить метод BeforeExecution в ISqlVisionPlugin если нужно
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Error in plugin {Plugin} BeforeExecution", plugin.Name);
            }
        }
    }

    public async Task AfterExecutionAsync(ScriptMetadata script, ExecutionResult result)
    {
        foreach (var plugin in _plugins)
        {
            try
            {
                // TODO: Добавить метод AfterExecution в ISqlVisionPlugin если нужно
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Error in plugin {Plugin} AfterExecution", plugin.Name);
            }
        }
    }

    private class PluginContext : IPluginContext
    {
        public IServiceProvider ServiceProvider { get; }
        public IConfiguration Configuration { get; }
        public ILogger Logger { get; }

        public PluginContext(IServiceProvider serviceProvider)
        {
            ServiceProvider = serviceProvider;
            Configuration = serviceProvider.GetRequiredService<IConfiguration>();
            Logger = serviceProvider.GetRequiredService<ILogger<PluginManager>>();
        }

        public Task ShowNotificationAsync(string message, NotificationType type)
        {
            // TODO: Реализовать показ уведомлений через UI
            Logger.LogInformation("Plugin notification ({Type}): {Message}", type, message);
            return Task.CompletedTask;
        }
    }
}