import 'dart:io';

import 'package:crypto/crypto.dart';
import 'package:libac_dart/utils/IOTools.dart';
import 'package:servermanager/structs/mod.dart';
import 'package:servermanager/structs/settings.dart';

Future<void> doDownloadMods(bool jail) async {
  Settings settings = Settings();

  // Build download command
  List<String> manifest = [
    "+@sSteamCmdForcePlatformType",
    "windows",
    "+force_install_dir",
    jail ? settings.getModJailPath() : settings.getModPath(),
    "+login",
    "anonymous",
  ];
  for (Mod M in settings.inst!.mods) {
    if (!M.enabled) continue;
    manifest.add("+workshop_download_item");
    manifest.add("440900");
    manifest.add("${M.mod_id}");
  }

  await settings.createModFolderIfNotExists();
  await settings.createModJailFolderIfNotExists();

  manifest.add("+quit");

  //print(
  //    "Running command: ${settings.getSteamCmd()} ${manifest.join(" ")}");

  var result = await Process.run(settings.getSteamCmd(), manifest);

  print(result.stdout);
}

Future<List<Mod>> doScanMods(bool jail) async {
  Settings settings = Settings();

  List<Mod> ret = [];

  for (Mod M in settings.inst!.mods.toList()) {
    if (!M.enabled) {
      ret.add(M);
      continue;
    }

    var index = settings.inst!.mods.indexOf(M);
    // Assemble final path.
    String modsPath = PathHelper.builder(
            jail ? settings.getModJailPath() : settings.getModPath())
        .resolve("steamapps")
        .resolve("workshop")
        .resolve("content")
        .resolve("440900")
        .resolve("${M.mod_id}")
        .build();

    Directory dir = Directory(modsPath);
    await for (var entity in dir.list()) {
      if (entity is File && entity.path.endsWith("pak")) {
        String name = entity.path.split(Platform.pathSeparator).last;

        var content = await entity.readAsBytes();
        var data = md5.convert(content);
        var hash = data.toString();

        M.mod_pak = name;
        M.mod_hash = hash;

        print("Discovered mod file: $name");
        print("Hash: $hash");

        // Update the mod instance, and retain the original modlist order
        ret.add(Mod(
            mod_hash: hash,
            mod_id: M.mod_id,
            mod_pak: name,
            mod_name: M.mod_name));
      }
    }
  }
  return ret;
}