'use strict';

var sinon = require('sinon');
var should = require('chai').should();
var Promise = require('bluebird');

var bitcore = require('bitcore');

var BlockService = require('../../lib/services/block');

describe('BlockService', function() {

  it('initializes correctly', function() {
    var database = 'database';
    var rpc = 'rpc';
    var txService = 'txService';
    var blockService = new BlockService({
      database: database,
      rpc: 'rpc',
      transactionService: 'txService'
    });
    should.exist(blockService);
    blockService.database.should.equal(database);
    blockService.rpc.should.equal(rpc);
    blockService.transactionService.should.equal(txService);
  });

  describe('getBlock', function() {

    var mockRpc, transactionMock, database, blockService;

    beforeEach(function() {
      database = sinon.mock();
      mockRpc = sinon.mock();
      transactionMock = sinon.mock();

      mockRpc.getBlockAsync = function(block) {
        return Promise.resolve({
          result: {
            hash: '000000006a625f06636b8bb6ac7b960a8d03705d1ace08b1a19da3fdcc99ddbd',
            confirmations: 347064,
            size: 215,
            height: 2,
            version: 1,
            merkleroot: '9b0fc92260312ce44e74ef369f5c66bbb85848f2eddd5a7a1cde251e54ccfdd5',
            tx: ['9b0fc92260312ce44e74ef369f5c66bbb85848f2eddd5a7a1cde251e54ccfdd5'],
            time: 1231469744,
            nonce: 1639830024,
            bits: '1d00ffff',
            previousblockhash: '00000000839a8e6886ab5951d76f411475428afc90947ee320161bbf18eb6048'
          }
        });
      };

      transactionMock.getTransaction = function(txId) {
        return Promise.resolve(
          '01000000010000000000000000000000000000000000000000000000000000000000000000ffffffff0704ffff001d010bffffffff0100f2052a010000004341047211a824f55b505228e4c3d5194c1fcfaa15a456abdf37f9b9d97a4040afc073dee6c89064984f03385237d92167c13e236446b417ab79a0fcae412ae3316b77ac00000000'
        );
      };

      blockService = new BlockService({
        rpc: mockRpc,
        transactionService: transactionMock,
        database: database
      });
    });

    it('retrieves correctly a block, uses RPC', function(callback) {

      var hash = '000000006a625f06636b8bb6ac7b960a8d03705d1ace08b1a19da3fdcc99ddbd';

      blockService.getBlock(hash).then(function(block) {
        block.hash.should.equal(hash);
        callback();
      });

    });

  });

  describe('block confirmation', function() {

    var mockRpc, transactionMock, database, blockService;

    var thenCaller = {
      then: function(arg) {
        return arg();
      }
    };
    var work = 1000;
    var work169 = 169;
    var work170 = 170;
    var genesisBlock = require('../data/genesis');
    genesisBlock.work = work;
    genesisBlock.height = 1;
    var block169 = require('../data/169');
    block169.work = work169;
    block169.height = 169;
    var block170 = require('../data/170');
    block170.work = work170;
    block170.height = 170;

    beforeEach(function() {
      database = sinon.mock();
      mockRpc = sinon.mock();
      transactionMock = sinon.mock();

      blockService = new BlockService({
        rpc: mockRpc,
        transactionService: transactionMock,
        database: database
      });
      blockService.writeLock = sinon.mock();
    });

    it('makes the expected calls when confirming the genesis block', function(callback) {
      database.batchAsync = function(ops) {
        var expectedOps = [{
          type: 'put',
          key: 'header-000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f',
          value: '{"version":1,"prevHash":"0000000000000000000000000000000000000000000000000000000000000000","merkleRoot":"4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b","time":1231006505,"bits":486604799,"nonce":2083236893}'
        }, {
          type: 'put',
          key: 'nxt-0000000000000000000000000000000000000000000000000000000000000000',
          value: '000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f'
        }, {
          type: 'put',
          key: 'prev-000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f',
          value: '0000000000000000000000000000000000000000000000000000000000000000'
        }, {
          type: 'put',
          key: 'bh-000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f',
          value: 0
        }, {
          type: 'put',
          key: 'wk-000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f',
          value: work
        }, {
          type: 'put',
          key: 'tip',
          value: genesisBlock.id
        }];
        ops.should.deep.equal(expectedOps);
        return callback();
      };
      transactionMock._confirmTransaction = sinon.mock();
      blockService.confirm(genesisBlock);
    });

    it('makes the expected calls when confirming the block #170', function(callback) {
      database.batchAsync = function(ops) {
        var eops = [{
          type: 'put',
          key: 'header-00000000d1145790a8694403d4063f323d499e655c83426834d4ce2f8dd4a2ee',
          value: '{"version":1,"prevHash":"000000002a22cfee1f2c846adbd12b3e183d4f97683f85dad08a79780a84bd55","merkleRoot":"7dac2c5666815c17a3b36427de37bb9d2e2c5ccec3f8633eb91a4205cb4c10ff","time":1231731025,"bits":486604799,"nonce":1889418792}'
        }, {
          type: 'put',
          key: 'nxt-000000002a22cfee1f2c846adbd12b3e183d4f97683f85dad08a79780a84bd55',
          value: '00000000d1145790a8694403d4063f323d499e655c83426834d4ce2f8dd4a2ee'
        }, {
          type: 'put',
          key: 'prev-00000000d1145790a8694403d4063f323d499e655c83426834d4ce2f8dd4a2ee',
          value: '000000002a22cfee1f2c846adbd12b3e183d4f97683f85dad08a79780a84bd55'
        }, {
          type: 'put',
          key: 'bh-00000000d1145790a8694403d4063f323d499e655c83426834d4ce2f8dd4a2ee',
          value: 170
        }, {
          type: 'put',
          key: 'wk-00000000d1145790a8694403d4063f323d499e655c83426834d4ce2f8dd4a2ee',
          value: work170
        }, {
          type: 'put',
          key: 'tip',
          value: block170.id
        }];
        ops.should.deep.equal(eops);
        return callback();
      };
      blockService.writeLock.onFirstCall().returns(thenCaller);
      transactionMock._confirmTransaction = sinon.spy();
      blockService.confirm(block170);
    });
  });
});