var assert = require('assert');
var bn = require('bn.js');
var bcoin = require('../')();
var utils = bcoin.utils;

describe('Utils', function() {
  it('should encode/decode base58', function() {
    var arr = new Buffer([ 0, 0, 0, 0xde, 0xad, 0xbe, 0xef ]);
    var b = utils.toBase58(arr);
    assert.equal(b, '1116h8cQN');
    assert.deepEqual(utils.fromBase58(b), arr);
  });

  it('should translate bits to target', function() {
    var bits = 0x1900896c;
    var hash = new Buffer(
      '672b3f1bb11a994267ea4171069ba0aa4448a840f38e8f340000000000000000',
      'hex'
    );
    var target = utils.fromCompact(bits);
    assert(utils.testTarget(target, hash));
  });

  it('should convert satoshi to btc', function() {
    var btc = utils.toBTC(new bn(5460));
    assert.equal(btc, '0.0000546');
    btc = utils.toBTC(new bn(54678).mul(new bn(1000000)));
    assert.equal(btc, '546.78');
    btc = utils.toBTC(new bn(5460).mul(new bn(10000000)));
    assert.equal(btc, '546.0');
    btc = utils.toBTC(new Buffer(new bn(5460).mul(new bn(10000000)).toArray()));
    assert.equal(btc, '546.0');
    // btc = utils.toBTC(new bn(5460).mul(new bn(10000000)).toString('hex'));
    // assert.equal(btc, '546.0');
  });

  it('should convert btc to satoshi', function() {
    var btc = utils.fromBTC('0.0000546');
    assert(btc.cmp(new bn(5460)) === 0);
    btc = utils.fromBTC('546.78');
    assert(btc.cmp(new bn(54678).mul(new bn(1000000))) === 0);
    btc = utils.fromBTC('546.0');
    assert(btc.cmp(new bn(5460).mul(new bn(10000000))) === 0);
  });
});