import 'dart:io';

import 'package:flutter/foundation.dart';

import '../../../comms/Comms.dart' show LogLine;
import '../application/ServiceConfig.dart';
import '../application/StepTracker.dart';
import 'BuildService.dart';
import 'ConnectFileStorage.dart';
import 'WebArchive.dart';

/// The one concrete [ConnectFileStorage]. Owns the [BuildService] and delegates
/// archiving to [WebArchive]; holds no state of its own beyond the builder.
class FileStorage implements ConnectFileStorage {
  final BuildService _builder = BuildService();

  @override
  bool get buildSupported => BuildService.supported;

  @override
  Stream<LogLine> get buildLogs => _builder.logs;

  @override
  Stream<List<DeployStep>> get buildStepStream => _builder.stepStream;

  @override
  Future<BuildResult> build(ServiceConfig service) => _builder.build(service);

  @override
  Future<BuildResult> buildWeb(ServiceConfig service) =>
      _builder.buildWeb(service);

  @override
  void cancelBuild() => _builder.cancel();

  @override
  Future<Uint8List> readArtifact(String path) => File(path).readAsBytes();

  @override
  Future<bool> artifactExists(String path) => File(path).exists();

  @override
  Future<(Uint8List, int)> packageWeb(String directoryPath) =>
      // Packaging a large static tree blocks long enough to drop frames, so it
      // runs on a background isolate.
      compute(packageWebDir, directoryPath);
}