using Microsoft.Extensions.Options;
using RobotNet10.CustomConfiguration.Events;
using RobotNet10.CustomConfiguration.Models;
using RobotNet10.StorageManager;

namespace RobotNet10.CustomConfiguration.Services;

/// <summary>
/// Service implementation cho quản lý configuration files
/// Sử dụng StorageManager để lưu trữ file JSON
/// </summary>
public partial class ConfigService : IConfigService, IDisposable
{
    private readonly StorageManager.StorageManager _storageManager;
    private const string ConfigPath = "configs"; // Path trong StorageManager
    private const string ConfigFileExtension = ".config.json"; // Extension cho config files
    private const string StorageConfigsKey = "StorageConfigs"; // Named options key cho IOptionsMonitor
    
    // ==========================================
    // EVENTS
    // ==========================================
    
    public event EventHandler<ConfigChangedEventArgs>? ConfigChanged;
    
    public ConfigService(IOptionsMonitor<StorageConfig> optionsSnapshot)
    {
        var config = optionsSnapshot.Get(StorageConfigsKey);

        ArgumentNullException.ThrowIfNull(config);

        _storageManager = new StorageManager.StorageManager(config);
    }
    
    /// <summary>
    /// Trigger ConfigChanged event
    /// </summary>
    protected virtual void OnConfigChanged(ConfigFile config, ConfigChangeType changeType, string? variableName = null)
    {
        var args = new ConfigChangedEventArgs
        {
            ConfigType = config.ConfigType,
            ConfigId = config.Id,
            ChangeType = changeType,
            VariableName = variableName
        };
        
        ConfigChanged?.Invoke(this, args);
    }

    public void Dispose()
    {
        _storageManager?.Dispose();
        GC.SuppressFinalize(this);
    }
}