import 'dart:io';
import 'package:speed_safe/app/util/log.dart';
import 'package:path/path.dart' as p;
enum OS { windows, linux, macos }
enum Architecture { x86_64, arm64 }


const speedVersion = '0.7.6';
const speedBuildNumber = 7;
const speedFullVersion = '$speedVersion+$speedBuildNumber';
const speedLastCommitHash = 'SELF_BUILD';

const String singBoxUrl = 'https://github.com/SagerNet/sing-box';
const String xrayCoreRepoUrl = 'https://github.com/xtls/xray-core';
const String shadowsocksRustUrl =
    'https://github.com/shadowsocks/shadowsocks-rust';
const String hysteriaUrl = 'https://github.com/apernet/hysteria';
const String singBoxRulesRepoUrl = 'https://github.com/lyc8503/sing-box-rules';
const String geositeDBUrl =
    'https://github.com/lyc8503/sing-box-rules/releases/latest/download/geosite.db';
const String geoipDBUrl =
    'https://github.com/lyc8503/sing-box-rules/releases/latest/download/geoip.db';
const String v2rayRulesDatRepoUrl =
    'https://github.com/Loyalsoldier/v2ray-rules-dat';
const String geositeDatUrl =
    'https://github.com/Loyalsoldier/v2ray-rules-dat/releases/latest/download/geosite.dat';
const String geoipDatUrl =
    'https://github.com/Loyalsoldier/v2ray-rules-dat/releases/latest/download/geoip.dat';
const String sphiaRepoUrl = 'https://github.com/YukidouSatoru/sphia';


final coreRepositories = {
  'sing-box': singBoxUrl,
  'xray-core': xrayCoreRepoUrl,
  'shadowsocks-rust': shadowsocksRustUrl,
  'hysteria': hysteriaUrl,
  'sing-box-rules': singBoxRulesRepoUrl,
  'v2ray-rules-dat': v2rayRulesDatRepoUrl,
  'sphia': sphiaRepoUrl,
  // Add new core here
};


class SystemUtil{
  static late final OS os;
  static late final Architecture architecture;
  static late final bool isRoot;

  static void init() {
    os = determineOS();
    architecture = determineArchitecture();
    isRoot = determineIsRoot();
  }

  static OS determineOS() {
    if(Platform.isWindows) {
      return OS.windows;
    } else if (Platform.isLinux) {
      return OS.linux;
    } else if (Platform.isMacOS){
      return OS.macos;
    } else {
      logger.e('Unsupported OS');
      throw Exception('Unsupported OS');
    }
  }

  static Architecture determineArchitecture() {
    if (os == OS.windows) {
      final arch = Platform.environment['PROCESSOR_ARCHITECTURE'];
      // https://learn.microsoft.com/en-us/windows/win32/winprog64/wow64-implementation-details
      if (arch == 'AMD64') {
        return Architecture.x86_64;
      } else if (arch == 'ARM64') {
        return Architecture.arm64;
      } else {
        logger.e('Unsupported Architecture');
        throw Exception('Unsupported Architecture');
      }
    } else {
      final result = Process.runSync('uname', ['-m']);
      if (result.exitCode == 0) {
        final arch = result.stdout.toString().trim();
        if (arch == 'x86_64') {
          return Architecture.x86_64;
        } else if (arch == 'aarch64' || arch == 'arm64') {
          return Architecture.arm64;
        } else {
          logger.e('Unsupported Architecture');
          throw Exception('Unsupported Architecture');
        }
      } else {
        logger.e('Unsupported Architecture');
        throw Exception('Unsupported Architecture');
      }
    }
  }


  static bool determineIsRoot() {
    if (os == OS.windows) {
      final result = Process.runSync('net', ['session']);
      if (result.exitCode == 0) {
        return true;
      } else {
        return false;
      }
    } else {
      final result = Process.runSync('id', ['-u']);
      if (result.exitCode == 0) {
        return result.stdout.toString().trim() == '0';
      } else {
        return false;
      }
    }
  }



  static void enableWindowsProxy(String listen, int httpPort) async {
    await runCommand('reg', [
      'add',
      'HKCU\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings',
      '/v',
      'ProxyEnable',
      '/t',
      'REG_DWORD',
      '/d',
      '1',
      '/f'
    ]);
    await runCommand('reg', [
      'add',
      'HKCU\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings',
      '/v',
      'ProxyServer',
      '/d',
      '$listen:$httpPort',
      '/f'
    ]);
    await runCommand('reg', [
      'add',
      'HKCU\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings',
      '/v',
      'ProxyOverride',
      '/d',
      '127.*;10.*;172.16.*;172.17.*;172.18.*;172.19.*;172.20.*;172.21.*;172.22.*;172.23.*;172.24.*;172.25.*;172.26.*;172.27.*;172.28.*;172.29.*;172.30.*;172.31.*;192.168.*',
      '/f'
    ]);
  }

  static void disableWindowsProxy() async {
    await runCommand('reg', [
      'add',
      'HKCU\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings',
      '/v',
      'ProxyEnable',
      '/t',
      'REG_DWORD',
      '/d',
      '0',
      '/f'
    ]);
  }

  static void enableMacOSProxy(String listen, int httpPort) async {
    await runCommand(
        'networksetup', ['-setwebproxy', 'wi-fi', listen, httpPort.toString()]);
    await runCommand('networksetup',
        ['-setsecurewebproxy', 'wi-fi', listen, httpPort.toString()]);
    await runCommand('networksetup', ['-setwebproxystate', 'wi-fi', 'on']);
    await runCommand(
        'networksetup', ['-setsecurewebproxystate', 'wi-fi', 'on']);
  }

  static void disableMacOSProxy() async {
    await runCommand('networksetup', ['-setwebproxystate', 'wi-fi', 'off']);
    await runCommand(
        'networksetup', ['-setsecurewebproxystate', 'wi-fi', 'off']);
  }


  static Future<void> runCommand(
      String executable, List<String> arguments) async {
    final result = await Process.run(executable, arguments, runInShell: true);
    if (result.exitCode != 0) {
      logger.e('Failed to run command: $executable $arguments');
      throw Exception('Failed to run command: $executable $arguments');
    }
  }

  static String getCoreFileName(String coreName) {
    final ext = os == OS.windows ? '.exe' : '';
    switch (coreName) {
      case 'sing-box':
        return 'sing-box$ext';
      case 'xray-core':
        return 'xray$ext';
      case 'shadowsocks-rust':
        return 'sslocal$ext';
      case 'hysteria':
        final plat = os == OS.macos ? 'darwin' : os.name;
        final arch = architecture == Architecture.arm64 ? 'arm64' : 'amd64';
        return 'hysteria-$plat-$arch$ext';
      case 'sphia':
        return 'sphia$ext';
      case 'upgradeAgent':
        return 'upgradeAgent$ext';
      default:
        throw Exception('Unsupported core: $coreName');
    }
  }

  static void setFilePermission(String fileName) {
    if (os != OS.windows) {
      Process.runSync('chmod', ['+x', fileName]);
    }
  }

  static void createDirectory(String dirName) {
    final dir = Directory(dirName);
    try {
      if (!dir.existsSync()) {
        logger.i('Creating directory: $dirName');
        dir.createSync();
      }
    } catch (e) {
      logger.e('Error creating directory: $e');
    }
  }
  static bool fileExists(String fileName) {
    return File(p.join(binPath, fileName)).existsSync();
  }

  static void deleteFileIfExists(String filePath, String logMessage) {
    final file = File(filePath);
    if (file.existsSync()) {
      logger.i(logMessage);
      file.deleteSync();
    }
  }

  static bool coreExists(String coreName) {
    if (coreName == 'sing-box-rules') {
      return fileExists(p.join(binPath, 'geoip.db')) &&
          fileExists(p.join(binPath, 'geosite.db'));
    } else if (coreName == 'v2ray-rules-dat') {
      return fileExists(p.join(binPath, 'geoip.dat')) &&
          fileExists(p.join(binPath, 'geosite.dat'));
    } else {
      return fileExists(p.join(binPath, getCoreFileName(coreName)));
    }
  }


  static List<String> getCoreFileNames() {
    List<String> fileNames = [];
    coreRepositories.entries
        .toList()
        .sublist(0, coreRepositories.length - 3)
        .forEach((entry) {
      fileNames.add(getCoreFileName(entry.key));
    });
    return fileNames;
  }


  static void initPaths() {
    binPath = p.join(appPath, 'bin');
    configPath = p.join(appPath, 'config');
    logPath = p.join(appPath, 'log');
    tempPath = p.join(appPath, 'temp');
  }
}

late final String execPath;
late final String appPath;
late String binPath;
late String configPath;
late String logPath;
late String tempPath;