var gpg = require('component-gpg-ex.js');

var File = java.io.File;
var ECSignatureTool = Packages.me.hatter.tools.commons.security.sign.SignatureTool;

var DEFAULT_SIGN_FILE_EXT = '.sig.txt';
var DEFAULT_PGP_KEY_ID = '6FAFC0E0170985AA71545483C794B1646A886CD6';
var DEFAULT_EC_PRIVATE_KEY_PGP_ENC = '-----BEGIN PGP MESSAGE-----\n' +
  'Comment: GPGTools - https://gpgtools.org\n' +
  '\n' +
  'hQIMA8N6kJ6vG/sAAQ//ef8seBe4daxW1tQg12G6tE2VhA1Y0W/Y3GKCtAxM8PwC\n' +
  'j/VjanTqozVwVQp7Qb3hHoBkEJBAEjrNtIhUE7dJBSbrGkK5i8mkQpkc8MFgtx1A\n' +
  'LVkhdNkTWenk07l6d56v0+iVjlWJsl9wlpP9eY3GkqkWydCXPEn0rICrB3mBf2BA\n' +
  'SRPqucnzSpIjH+KXhUcyVFjU86ZHyzoRP5RwG2MVVSWhwt7Oyd9A6p1hAKHKIjwH\n' +
  'K1W4PhxwrjnelcVWC2uwSLWXqgdXQ0EZXMzH5fv3R2EdZopyaC7AF6/jtauEs5RO\n' +
  'X4l64jjfajqswSZKW0fGKqJgPVzb3p2fBGBeBFx2sYGU/Xk7QTQlfKOvADzLdEIE\n' +
  'hw/i1Huo/xSg4CYiyjlVw82x6cA10UP2d7KRA21NPqWQUKv9p6aWpjkXoM1UE+5D\n' +
  'TdyHSnT0Fu+VaBsGZ+3/x+oRlM6PHjk22n8CUEsZecYzGnyXyAEJuCaYOVtfSMTW\n' +
  'gdy13gJInaxMawHHyRVFqJClZsXc4LEsSsY4fdTus6mEkD+S5S2gkoFffB6uLWYL\n' +
  'pq59IIJ+tp2Y3wxCqUXhu0PYer5No7lU/A53+dtcj7xQYLoOUlB/DkHWfmqAsJi7\n' +
  'Zt+SXoy0ksCtXciBZRhuJESbISALjKqOfQIV/8J9GrN/zQl/dzEmrfgqE00hY1bS\n' +
  'kQFX26y+2iY7k2xoLg+fNB6LNKmtM4U6115CL+rcX3p02P1f4E6O4gGEg9l/3fe2\n' +
  'rz7+2a3WK/MNE1Ak7ImFf6ufU3PHUCQqyEqk7wGeNmRRG3SPJUyBQbpa6I+4xTZ8\n' +
  'R6RqgeigqUMDFyyIwYULEwP+dqnHfRBeckh3MKGfrHQUmgrGDOYawxb1G+h2iaVC\n' +
  'VtA=\n' +
  '=QCYC\n' +
  '-----END PGP MESSAGE-----';
var DEFAULT_EC_PUBLIC_KEY = 'MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAESZWG1x7tlv02YF+UZzuZdLquR6Oi3H7QRmaRWzDoupG66dWeKruRUQVj2ozliDKaRQ+5b91u/z9BApIaFs6quw==';

var generateECsecp256r1KeyPair = () => {
  var ecSignTool = ECSignatureTool.secp256r1();
  ecSignTool.generateKeyPair();
  return {
    'privKey': ecSignTool.encodePriKey(),
    'pubKey': ecSignTool.encodePubKey()
  };
};

var __defaultEcPrivateKeyBytes = null;
var getDefaultEcPrivateKeyBytes = () => {
  if (__defaultEcPrivateKeyBytes != null) { return __defaultEcPrivateKeyBytes; }

  var __defaultEcPrivateKeyLocalFile = $$.file('~/.jssp/config/.defaultecprivatekey.json');
  if (__defaultEcPrivateKeyLocalFile.exists()) {
    return __.bytes.fromBase64(JSON.parse($$.rFile(__defaultEcPrivateKeyLocalFile).string()).base64Key);
  }

  var tempPrivKeyFile = File.createTempFile('component-pki', '.temp_key');
  $$.rFile(tempPrivKeyFile).write(DEFAULT_EC_PRIVATE_KEY_PGP_ENC);
  tempPrivKeyFile.deleteOnExit();
  var privKey = gpg.decrypt(tempPrivKeyFile.getAbsolutePath());
  __defaultEcPrivateKeyBytes = __.bytes.fromBase64(privKey.trim());

  __defaultEcPrivateKeyLocalFile.getParentFile().mkdirs();
  $$.rFile(__defaultEcPrivateKeyLocalFile).write(JSON.stringify({
    'date': $$.date().fmt('yyyy-MM-dd HH:mm:ss Z').format($$.date().today()),
    'base64Key': __defaultEcPrivateKeyBytes.asBase64()
  }));

  return __defaultEcPrivateKeyBytes;
};

var getDefaultEcPublicKeyBytes = () => {
  return __.bytes.fromBase64(DEFAULT_EC_PUBLIC_KEY);
};

var getDefaultEcSignSignature = () => {
  return ECSignatureTool.secp256r1().decodePriKey(getDefaultEcPrivateKeyBytes()).signSHA256ECDSA();
};

var getDefaultEcVerifySignature = () => {
  return ECSignatureTool.secp256r1().decodePubKey(getDefaultEcPublicKeyBytes()).verifySHA256ECDSA();
};

var defaultSignFile = (file) => {
  file = $$.file(file);
  if (file.getName().endsWith(DEFAULT_SIGN_FILE_EXT) || !(file.exists()) || !(file.isFile())) {
    return false;
  }
  var signFile = $$.file(file.getAbsoluteFile().getParentFile(), file.getName() + DEFAULT_SIGN_FILE_EXT);
  var sigHex = $$.rFile(file).sign(getDefaultEcSignSignature()).asHex();
  $$.rFile(signFile).write(JSON.stringify({
    'length': $$.str(file.length()),
    'lastModified': $$.str(file.lastModified()),
    'signature': sigHex
  }));
  return true;
};

var defaultSignFileV2 = (file) => {
  file = $$.file(file);
  if (file.getName().endsWith(DEFAULT_SIGN_FILE_EXT) || !(file.exists()) || !(file.isFile())) {
    return false;
  }
  var signFile = $$.file(file.getAbsoluteFile().getParentFile(), file.getName() + DEFAULT_SIGN_FILE_EXT);
  var sha256 = $$.rFile(file).digest(__.digests.sha256()).asHex();
  var sigHex = __.bytes.fromHex(sha256).sign(getDefaultEcSignSignature()).asHex();
  $$.rFile(signFile).write(JSON.stringify({
    'version': 2,
    'length': $$.str(file.length()),
    'lastModified': $$.str(file.lastModified()),
    'SHA256': sha256,
    'signature': sigHex
  }));
  return true;
};

var defaultQuickVerifyFile = (file) => {
  file = $$.file(file);
  if (file.getName().endsWith(DEFAULT_SIGN_FILE_EXT) || !(file.exists()) || !(file.isFile())) {
    return null;
  }
  var signFile = $$.file(file.getAbsoluteFile().getParentFile(), file.getName() + DEFAULT_SIGN_FILE_EXT);
  if (!(signFile.exists())) {
    return null;
  }
  var signatureJSON = JSON.parse($$.rFile(signFile).string().trim());
  return $$.strEquals(file.length(), signatureJSON.length) && $$.strEquals(file.lastModified(), signatureJSON.lastModified);
};

var defaultVerifyFile = (file) => {
  file = $$.file(file);
  if (file.getName().endsWith(DEFAULT_SIGN_FILE_EXT) || !(file.exists()) || !(file.isFile())) {
    return null;
  }
  var signFile = $$.file(file.getAbsoluteFile().getParentFile(), file.getName() + DEFAULT_SIGN_FILE_EXT);
  if (!(signFile.exists())) {
    return null;
  }
  var signatureJSON = JSON.parse($$.rFile(signFile).string().trim());
  if (signatureJSON.version) {
    var sha256 = $$.rFile(file).digest(__.digests.sha256());
    return $$.strEquals(sha256.asHex(), signatureJSON.SHA256) && sha256.verify(getDefaultEcVerifySignature(), __.bytes.fromHex(signatureJSON.signature));
  } else {
    return $$.rFile(file).verify(getDefaultEcVerifySignature(), __.bytes.fromHex(signatureJSON.signature));
  }
};

if (typeof exports == 'object') {
  exports.generateECsecp256r1KeyPair = generateECsecp256r1KeyPair;
  exports.getDefaultEcPrivateKeyBytes = getDefaultEcPrivateKeyBytes;
  exports.getDefaultEcPublicKeyBytes = getDefaultEcPublicKeyBytes;
  exports.getDefaultEcSignSignature = getDefaultEcSignSignature;
  exports.getDefaultEcVerifySignature = getDefaultEcVerifySignature;
  exports.defaultSignFile = defaultSignFile;
  exports.defaultVerifyFile = defaultVerifyFile;
  exports.defaultSignFileV2 = defaultSignFileV2;
  exports.defaultQuickVerifyFile = defaultQuickVerifyFile;
}