using RobotNet10.CustomConfiguration.Helpers;
using RobotNet10.CustomConfiguration.Models;
using System.IO;
using System.Text.Json;

namespace RobotNet10.CustomConfiguration.Services;

/// <summary>
/// Helper methods cho quản lý metadata (load từ config files)
/// </summary>
public partial class ConfigService
{
    /// <summary>
    /// Load tất cả config files và trả về metadata
    /// </summary>
    private async Task<List<ConfigFileMetadata>> LoadAllMetadataAsync()
    {
        var metadataList = new List<ConfigFileMetadata>();
        
        try
        {
            // List all files in configs directory
            var files = await _storageManager.ListAsync(ConfigPath, recursive: false, CancellationToken.None);
            
            // Filter only .config.json files
            var configFiles = files.Where(f => f.EndsWith(ConfigFileExtension, StringComparison.OrdinalIgnoreCase)).ToList();

            foreach (var fileName in configFiles)
            {
                try
                {
                    // Extract configType from filename: {configType}.config.json
                    var configType = fileName.Replace(ConfigFileExtension, "", StringComparison.OrdinalIgnoreCase);
                    
                    // Load config file to get metadata
                    var config = await LoadConfigFileAsync(configType);
                    if (config != null)
                    {
                        metadataList.Add(new ConfigFileMetadata
                        {
                            Id = config.Id,
                            ConfigType = config.ConfigType,
                            CreatedAt = config.CreatedAt,
                            UpdatedAt = config.UpdatedAt,
                            Description = config.Description
                        });
                    }
                }
                catch (JsonException)
                {
                    // Skip corrupted config files
                    continue;
                }
            }
        }
        catch (Exception ex) when (ex is IOException or UnauthorizedAccessException)
        {
            // Storage unavailable - return what we have so far
            return metadataList;
        }
        
        return metadataList;
    }
    
    /// <summary>
    /// Get metadata by ConfigType (load từ config file)
    /// </summary>
    private async Task<ConfigFileMetadata?> GetMetadataByTypeAsync(string configType)
    {
        var config = await LoadConfigFileAsync(configType);
        if (config == null)
        {
            return null;
        }
        
        return new ConfigFileMetadata
        {
            Id = config.Id,
            ConfigType = config.ConfigType,
            CreatedAt = config.CreatedAt,
            UpdatedAt = config.UpdatedAt,
            Description = config.Description
        };
    }
}