'use strict';

var chai = chai || require('chai');
var bitcore = bitcore || require('../bitcore');
var should = chai.should();

var testdata = testdata || require('./testdata');
var BlockModule = bitcore.Block;
var BinaryParser = bitcore.BinaryParser;
var Block;


var getBlock = function (onlyHeader) {

  var testnetMagic = bitcore.networks.testnet.magic.toString('hex');

  var b = new Block();
  // this is block 86756 from testnet3
  var p = new BinaryParser(testdata.dataRawBlock);


  var magic = p.buffer(4).toString('hex');


  if (magic !== testnetMagic )
    throw new Error('CRITICAL ERROR: Magic number mismatch: ' +
                    magic + ' : ' + testnetMagic);

  p.word32le();
  b.parse(p, onlyHeader);
  return b;
};

describe('Block', function() {
  it('should initialze the main object', function() {
    should.exist(BlockModule);
  });
  it('should be able to create class', function() {
    Block = BlockModule;
    should.exist(Block);
  });
  it('should be able to create instance', function() {
    var b = new Block();
    should.exist(b);
  });

  it('should be able to parse a block from hex', function() {
    var b = getBlock();
    should.exist(b);
    should.exist(b.getHash());
  });

  it('should be able to check block contents', function() {
    var b = getBlock();
    should.exist(b.getHash());
    b.checkHash().should.equal(true);
    b.checkProofOfWork().should.equal(true);
    b.getWork().toString().should.equal('17180131332');
    b.checkTimestamp().should.equal(true);

  });
  it('#checkBlock should be able to check block contents', function() {
    var b = getBlock();
    should.exist(b.getHash());
    b.checkBlock().should.equal(true);
  });


  it('should be able to check Transactions', function() {
    var b = getBlock();

    b.checkTransactions(b.txs).should.equal(true);
    b.checkTransactions.bind([]).should.throw();

    var coinbase = b.txs.shift;
    b.checkTransactions.bind(b.txs).should.throw();
    b.txs.push(coinbase);
    b.checkTransactions.bind(b.txs).should.throw();


  });

  it('should be able to checkMerkleRoot', function() {

    var b = getBlock();
    b.getMerkleTree(b.txs).length.should.equal(45);
    bitcore.buffertools.toHex(b.calcMerkleRoot(b.txs)).should.equal(bitcore.buffertools.toHex(new Buffer(b.merkle_root)));

    b.checkMerkleRoot(b.txs);

    delete b['merkle_root'];
    b.checkMerkleRoot.bind(b.txs).should.throw();


    b.merkle_root=new Buffer('wrong');
    b.checkMerkleRoot.bind(b.txs).should.throw();
  });


 
  it('should be able to checkProofOfWork', function() {
    var b = getBlock();

    b.hash = bitcore.buffertools.reverse(new Buffer('000000000b99b16390660d79fcc138d2ad0c89a0d044c4201a02bdf1f61ffa11', 'hex'));
    b.checkHash().should.equal(true);
    b.checkProofOfWork().should.equal(true);

    // wrong hash hash, ok proof of work
    b.hash = bitcore.buffertools.reverse(new Buffer('000000000000016390660d79fcc138d2ad0c89a0d044c4201a02bdf1f61ffa11', 'hex'));
    b.checkProofOfWork().should.equal(true);
    b.checkHash().should.equal(false);


    // wrong hash hash, wrong proof of work
    b.hash = bitcore.buffertools.reverse(new Buffer('0000000bbb99b16390660d79fcc138d2ad0c89a0d044c4201a02bdf1f61ffa11', 'hex'));
    b.checkHash().should.equal(false);
    b.checkProofOfWork.bind().should.throw();
  });


  it('should be able to check via checkBlock', function() {
    var b = getBlock();
    b.checkBlock.bind(b.txs).should.throw();
    b.getHash();
    b.checkBlock(b.txs).should.equal(true);
  });

  it('should be able to get components from blocks', function() {
    var b = getBlock(true);

    bitcore.util.formatHashFull(b.getHash()).should.equal('000000000b99b16390660d79fcc138d2ad0c89a0d044c4201a02bdf1f61ffa11');

    bitcore.util.formatHashFull(b.getHeader()).should.equal('d6383bd51c3fffc051be10ce58e6d52d1eb00470ae1ab4d5a3375c0f51382c6f249fff84e9888286974cfc97000000003c35b5e70b13d5b938fef4e998a977c17bea978390273b7c50a9aa4b00000002');

    bitcore.util.formatHashFull(b.merkle_root).should.equal('58e6d52d1eb00470ae1ab4d5a3375c0f51382c6f249fff84e9888286974cfc97');

  });


  it('#getBlockValue should return the correct block value', function() {
    var c = bitcore.util.COIN;
    bitcore.Block.getBlockValue(0).div(c).toNumber().should.equal(50);
    bitcore.Block.getBlockValue(1).div(c).toNumber().should.equal(50);
    bitcore.Block.getBlockValue(209999).div(c).toNumber().should.equal(50);
    bitcore.Block.getBlockValue(210000).div(c).toNumber().should.equal(25);
    bitcore.Block.getBlockValue(2100000).toNumber().should.equal(4882812);
  });


  it('#getStandardizedObject should return object', function() {
    var b = getBlock();
    var o = b.getStandardizedObject(b.txs);

    o.hash.should.equal('000000000b99b16390660d79fcc138d2ad0c89a0d044c4201a02bdf1f61ffa11');
    o.n_tx.should.equal(22);
    o.size.should.equal(8003);
    var o2 = b.getStandardizedObject();
    o2.hash.should.equal('000000000b99b16390660d79fcc138d2ad0c89a0d044c4201a02bdf1f61ffa11');
    o2.size.should.equal(0);
  });


  it('#miner should call the callback', function(done) {
    var b = getBlock();
    var Miner =  function() {};
    Miner.prototype.solve = function (header,target,cb) {
      this.called=1;
      should.exist(header);
      should.exist(target);
      return cb();
    };
    var miner = new Miner();
    b.solve(miner, function () {
      miner.called.should.equal(1);
      done();
    });

  });

  it('#createCoinbaseTx should create a tx', function() {
    var b = new Block();
    var pubkey = new Buffer('02d20b3fba521dcf88dfaf0eee8c15a8ba692d7eb0cb957d5bcf9f4cc052fb9cc6');
    var tx = b.createCoinbaseTx(pubkey);
    should.exist(tx);
    tx.isCoinBase().should.equal(true);
  });
});