'use strict';

var should = require('chai').should();
var bitcore = require('..');
var Point = bitcore.crypto.Point;
var BN = bitcore.crypto.BN;
var PublicKey = bitcore.PublicKey;
var PrivateKey = bitcore.PrivateKey;

describe('PublicKey', function() {

  var invalidPoint = '0400000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000';

  it('should error because of missing data', function() {
    (function() {
      var pk = new PublicKey();
    }).should.throw('First argument is required, please include public key data.');
  });

  it('should error because of an invalid point', function() {
    (function() {
      var pk = new PublicKey(invalidPoint);
    }).should.throw('Invalid x,y value for curve, cannot equal 0.');
  });

  it('should error because of an invalid public key point, not on the secp256k1 curve', function() {
    (function() {
      var pk = new PublicKey(Point(1000, 1000));
    }).should.throw('Invalid y value for curve.');
  });

  it('should error because of an unrecognized data type', function() {
    (function() {
      var pk = new PublicKey(new Error());
    }).should.throw('First argument is an unrecognized data format.');
  });

  it('should instantiate from a private key', function() {
    var privhex = '906977a061af29276e40bf377042ffbde414e496ae2260bbf1fa9d085637bfff';
    var pubhex = '02a1633cafcc01ebfb6d78e39f687a1f0995c62fc95f51ead10a02ee0be551b5dc';
    var privkey = new PrivateKey(BN(new Buffer(privhex, 'hex')));
    var pk = new PublicKey(privkey);
    pk.toString().should.equal(pubhex);
  });

  it('should instantiate from a compressed public key', function() {
    var publicKeyHex = '031ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a';
    var publicKey = new PublicKey(publicKeyHex);
    publicKey.toString().should.equal(publicKeyHex);
  });

  it('should instantiate from another publicKey', function() {
    var publicKeyHex = '031ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a';
    var publicKey = new PublicKey(publicKeyHex);
    var publicKey2 = new PublicKey(publicKey);
    publicKey.should.equal(publicKey2);
  });

  it('should instantiate from a hex encoded DER string', function() {
    var pk = new PublicKey('041ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a7baad41d04514751e6851f5304fd243751703bed21b914f6be218c0fa354a341');
    should.exist(pk.point);
    pk.point.getX().toString(16).should.equal('1ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a');
  });

  it('should instantiate from a hex encoded DER buffer', function() {
    var pk = new PublicKey(new Buffer('041ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a7baad41d04514751e6851f5304fd243751703bed21b914f6be218c0fa354a341', 'hex'));
    should.exist(pk.point);
    pk.point.getX().toString(16).should.equal('1ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a');
  });

  it('should create a public key with a point', function() {
    var p = Point('86a80a5a2bfc48dddde2b0bd88bd56b0b6ddc4e6811445b175b90268924d7d48',
                  '3b402dfc89712cfe50963e670a0598e6b152b3cd94735001cdac6794975d3afd');
    var a = new PublicKey(p);
    should.exist(a.point);
    a.point.toString().should.equal(p.toString());
    var c = PublicKey(p);
    should.exist(c.point);
    c.point.toString().should.equal(p.toString());
  });

  describe('#getValidationError', function(){

    it('should recieve an invalid point error', function() {
      var error = PublicKey.getValidationError(invalidPoint);
      should.exist(error);
      error.message.should.equal('Invalid x,y value for curve, cannot equal 0.');
    });

    it('should recieve a boolean as false', function() {
      var valid = PublicKey.isValid(invalidPoint);
      valid.should.equal(false);
    });

    it('should recieve a boolean as true for uncompressed', function() {
      var valid = PublicKey.isValid('041ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a7baad41d04514751e6851f5304fd243751703bed21b914f6be218c0fa354a341');
      valid.should.equal(true);
    });

    it('should recieve a boolean as true for compressed', function() {
      var valid = PublicKey.isValid('031ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a');
      valid.should.equal(true);
    });

  });

  describe('#fromPoint', function() {

    it('should instantiate from a point', function() {
      var p = Point('86a80a5a2bfc48dddde2b0bd88bd56b0b6ddc4e6811445b175b90268924d7d48',
                    '3b402dfc89712cfe50963e670a0598e6b152b3cd94735001cdac6794975d3afd');
      var b = PublicKey.fromPoint(p);
      should.exist(b.point);
      b.point.toString().should.equal(p.toString());
    });

    it('should error because paramater is not a point', function() {
      (function() {
        PublicKey.fromPoint(new Error());
      }).should.throw('First argument must be an instance of Point.');
    });
  });

  describe('#json', function() {

    it('should input/ouput json', function() {
      var json = JSON.stringify({
        x: '1ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a',
        y: '7baad41d04514751e6851f5304fd243751703bed21b914f6be218c0fa354a341',
        compressed: false
      });
      PublicKey.fromJSON(json).toJSON().should.deep.equal(json);
    });

  });

  describe('#fromPrivateKey', function() {

    it('should make a public key from a privkey', function() {
      should.exist(PublicKey.fromPrivateKey(PrivateKey.fromRandom()));
    });

    it('should error because not an instance of privkey', function() {
      (function() {
        PublicKey.fromPrivateKey(new Error());
      }).should.throw('Must be an instance of PrivateKey');
    });

  });

  describe('#fromBuffer', function() {

    it('should parse this uncompressed public key', function() {
      var pk = PublicKey.fromBuffer(new Buffer('041ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a7baad41d04514751e6851f5304fd243751703bed21b914f6be218c0fa354a341', 'hex'));
      pk.point.getX().toString(16).should.equal('1ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a');
      pk.point.getY().toString(16).should.equal('7baad41d04514751e6851f5304fd243751703bed21b914f6be218c0fa354a341');
    });

    it('should parse this compressed public key', function() {
      var pk = PublicKey.fromBuffer(new Buffer('031ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a', 'hex'));
      pk.point.getX().toString(16).should.equal('1ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a');
      pk.point.getY().toString(16).should.equal('7baad41d04514751e6851f5304fd243751703bed21b914f6be218c0fa354a341');
    });

    it('should throw an error on this invalid public key', function() {
      (function() {
        PublicKey.fromBuffer(new Buffer('091ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a', 'hex'));
      }).should.throw();
    });

    it('should throw error because not a buffer', function() {
      (function() {
        PublicKey.fromBuffer('091ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a');
      }).should.throw('Must be a hex buffer of DER encoded public key');
    });

    it('should throw error because buffer is the incorrect length', function() {
      (function() {
        PublicKey.fromBuffer(new Buffer('041ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a7baad41d04514751e6851f5304fd243751703bed21b914f6be218c0fa354a34112', 'hex'));
      }).should.throw('Length of x and y must be 32 bytes');
    });

  });

  describe('#fromDER', function() {

    it('should parse this uncompressed public key', function() {
      var pk = PublicKey.fromDER(new Buffer('041ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a7baad41d04514751e6851f5304fd243751703bed21b914f6be218c0fa354a341', 'hex'));
      pk.point.getX().toString(16).should.equal('1ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a');
      pk.point.getY().toString(16).should.equal('7baad41d04514751e6851f5304fd243751703bed21b914f6be218c0fa354a341');
    });

    it('should parse this compressed public key', function() {
      var pk = PublicKey.fromDER(new Buffer('031ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a', 'hex'));
      pk.point.getX().toString(16).should.equal('1ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a');
      pk.point.getY().toString(16).should.equal('7baad41d04514751e6851f5304fd243751703bed21b914f6be218c0fa354a341');
    });

    it('should throw an error on this invalid public key', function() {
      (function() {
        PublicKey.fromDER(new Buffer('091ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a', 'hex'));
      }).should.throw();
    });

  });

  describe('#fromString', function() {

    it('should parse this known valid public key', function() {
      var pk = PublicKey.fromString('041ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a7baad41d04514751e6851f5304fd243751703bed21b914f6be218c0fa354a341');
      pk.point.getX().toString(16).should.equal('1ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a');
      pk.point.getY().toString(16).should.equal('7baad41d04514751e6851f5304fd243751703bed21b914f6be218c0fa354a341');
    });

  });

  describe('#fromX', function() {

    it('should create this known public key', function() {
      var x = BN.fromBuffer(new Buffer('1ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a', 'hex'));
      var pk = PublicKey.fromX(true, x);
      pk.point.getX().toString(16).should.equal('1ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a');
      pk.point.getY().toString(16).should.equal('7baad41d04514751e6851f5304fd243751703bed21b914f6be218c0fa354a341');
    });


    it('should error because odd was not included as a param', function() {
      var x = BN.fromBuffer(new Buffer('1ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a', 'hex'));
      (function() {
        var pk = PublicKey.fromX(null, x);
      }).should.throw('Must specify whether y is odd or not (true or false)');
    });

  });

  describe('#toBuffer', function() {

    it('should return this compressed DER format', function() {
      var x = BN.fromBuffer(new Buffer('1ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a', 'hex'));
      var pk = PublicKey.fromX(true, x);
      pk.toBuffer().toString('hex').should.equal('031ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a');
    });

    it('should return this uncompressed DER format', function() {
      var x = BN.fromBuffer(new Buffer('1ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a', 'hex'));
      var pk = PublicKey.fromX(true, x);
      pk.toBuffer().toString('hex').should.equal('031ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a');
    });

  });

  describe('#toDER', function() {

    it('should return this compressed DER format', function() {
      var x = BN.fromBuffer(new Buffer('1ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a', 'hex'));
      var pk = PublicKey.fromX(true, x);
      pk.toDER().toString('hex').should.equal('031ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a');
    });

    it('should return this uncompressed DER format', function() {
      var pk = PublicKey.fromString('041ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a7baad41d04514751e6851f5304fd243751703bed21b914f6be218c0fa354a341');
      pk.toDER().toString('hex').should.equal('041ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a7baad41d04514751e6851f5304fd243751703bed21b914f6be218c0fa354a341');
    });
  });

  describe('#toAddress', function() {

    it('should output this known mainnet address correctly', function() {
      var pk = new PublicKey('03c87bd0e162f26969da8509cafcb7b8c8d202af30b928c582e263dd13ee9a9781');
      var address = pk.toAddress('livenet');
      address.toString().should.equal('1A6ut1tWnUq1SEQLMr4ttDh24wcbJ5o9TT');
    });

    it('should output this known testnet address correctly', function() {
      var pk = new PublicKey('0293126ccc927c111b88a0fe09baa0eca719e2a3e087e8a5d1059163f5c566feef');
      var address = pk.toAddress('testnet');
      address.toString().should.equal('mtX8nPZZdJ8d3QNLRJ1oJTiEi26Sj6LQXS');
    });

  });

  describe('#toString', function() {

    it('should print this known public key', function() {
      var hex = '031ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a';
      var pk = PublicKey.fromString(hex);
      pk.toString().should.equal(hex);
    });

  });

  describe('#inspect', function() {
    it('should output known uncompressed pubkey for console', function() {
      var pubkey = PublicKey.fromString('041ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a7baad41d04514751e6851f5304fd243751703bed21b914f6be218c0fa354a341');
      pubkey.inspect().should.equal('<PublicKey: 041ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a7baad41d04514751e6851f5304fd243751703bed21b914f6be218c0fa354a341, uncompressed>');
    });

    it('should output known compressed pubkey for console', function() {
      var pubkey = PublicKey.fromString('031ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a');
      pubkey.inspect().should.equal('<PublicKey: 031ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a>');
    });

    it('should output known compressed pubkey with network for console', function() {
      var privkey = PrivateKey.fromWIF('L3T1s1TYP9oyhHpXgkyLoJFGniEgkv2Jhi138d7R2yJ9F4QdDU2m');
      var pubkey = new PublicKey(privkey);
      pubkey.inspect().should.equal('<PublicKey: 03c87bd0e162f26969da8509cafcb7b8c8d202af30b928c582e263dd13ee9a9781, network: livenet>');
    });

  });

  describe('#validate', function() {

    it('should not have an error if pubkey is valid', function() {
      var hex = '031ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a';
      var pk = PublicKey.fromString(hex);
    });

    it('should throw an error if pubkey is invalid', function() {
      var hex = '041ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a0000000000000000000000000000000000000000000000000000000000000000';
      (function() {
        var pk = PublicKey.fromString(hex);
      }).should.throw('Invalid x,y value for curve, cannot equal 0.');
    });

    it('should throw an error if pubkey is invalid', function() {
      var hex = '041ff0fe0f7b15ffaa85ff9f4744d539139c252a49710fb053bb9f2b933173ff9a00000000000000000000000000000000000000000000000000000000000000FF';
      (function() {
        var pk = PublicKey.fromString(hex);
      }).should.throw('Invalid y value for curve.');
    });

    it('should throw an error if pubkey is infinity', function() {
      (function() {
        var pk = new PublicKey(Point.getG().mul(Point.getN()));
      }).should.throw('Point cannot be equal to Infinity');
    });

  });

});