using AZKiServer.Models;

namespace AZKiServer.Services;

public class FileScannerService(MediaService mediaService, IConfiguration config, ILogger<FileScannerService> logger) : IHostedService, IDisposable
{
	private Timer? _timer;

	public void Dispose()
	{
		_timer?.Dispose();
	}

	public Task StartAsync(CancellationToken cancellationToken)
	{
		var path = config["SCAN_LOCATION"];
		if (string.IsNullOrWhiteSpace(path))
			return Task.CompletedTask;
		_timer = new Timer((_) =>
		{
			ScanFilesAsync(path).Wait();
		}, null, TimeSpan.FromMinutes(0), TimeSpan.FromHours(1));
		return Task.CompletedTask;
	}

	public Task StopAsync(CancellationToken cancellationToken)
	{
		_timer?.Dispose();
		return Task.CompletedTask;
	}


	private async Task ScanFilesAsync(string path)
	{
		logger.LogInformation("Scanning Files");
		try
		{
			var files = Directory.GetFiles(path, "*", SearchOption.AllDirectories);
			var existingFiles = await mediaService.GetExistingFilePathsAsync();
			var entries = new List<MediaEntry>();
			foreach (var filePath in files)
			{
				var relativePath = Path.GetRelativePath(path, filePath);
				if (relativePath[0] == '.') //Ignore hidden folders
					continue;
				if (existingFiles.Contains(relativePath))
					continue;
				var entry = MediaEntry.Parse(relativePath);
				if(entry.HasError)
				{
					logger.LogError(entry.Error.GetException(), "Failed to parse file data");
					continue;
				}
				entries.Add(entry);
			}
			if(entries.Count > 0) {
				await mediaService.AddMediaBulkAsync(entries);
				logger.LogInformation("Added {count} file entries", entries.Count);
			}
		}
		catch (Exception ex)
		{
			logger.LogError(ex, "Failed to read directory contents");
		}
	}
}