using System.IO;
using Microsoft.Extensions.Logging;

namespace EnvelopeGenerator.WorkerService.Services;

public sealed class TempFileManager
{
    private readonly ILogger<TempFileManager> _logger;

    public TempFileManager(ILogger<TempFileManager> logger)
    {
        _logger = logger;
        TempPath = Path.Combine(Path.GetTempPath(), "EnvelopeGenerator");
    }

    public string TempPath { get; }

    public Task CreateAsync(CancellationToken cancellationToken = default)
    {
        try
        {
            if (!Directory.Exists(TempPath))
            {
                Directory.CreateDirectory(TempPath);
                _logger.LogDebug("Created temp folder {TempPath}", TempPath);
            }
            else
            {
                CleanUpFiles();
            }
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "Failed to create temp folder {TempPath}", TempPath);
            throw;
        }

        return Task.CompletedTask;
    }

    public Task CleanupAsync(CancellationToken cancellationToken = default)
    {
        try
        {
            if (Directory.Exists(TempPath))
            {
                _logger.LogDebug("Deleting temp folder {TempPath}", TempPath);
                Directory.Delete(TempPath, recursive: true);
            }
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "Failed to clean up temp folder {TempPath}", TempPath);
        }

        return Task.CompletedTask;
    }

    private void CleanUpFiles()
    {
        foreach (var file in Directory.GetFiles(TempPath))
        {
            try
            {
                _logger.LogDebug("Deleting temp file {File}", file);
                File.Delete(file);
            }
            catch (Exception ex)
            {
                _logger.LogWarning(ex, "Failed to delete temp file {File}", file);
            }
        }
    }
}