'use strict';

var chai = require('chai');
var should = chai.should();

var EventEmitter = require('eventemitter2').EventEmitter2;
var Promise = require('bluebird');
Promise.longStackTraces();
var bitcore = require('bitcore');
var _ = bitcore.deps._;

var BitcoreNode = require('../../../');
var mockBlocks = require('../data/blocks');

describe('BitcoreHTTP v1 blocks routes', function() {

  // mocks
  var b1 = mockBlocks[_.keys(mockBlocks)[0]];
  var firstBlock = mockBlocks[_.keys(mockBlocks).splice(0, 1)[0]];
  var secondBlock = mockBlocks[_.keys(mockBlocks).splice(1, 1)[0]];
  var lastBlock = mockBlocks[_.keys(mockBlocks).splice(-1)[0]];
  var blockForHash = function(hash) {
    return mockBlocks[hash];
  };
  var last3 = _.keys(mockBlocks).splice(-3).map(blockForHash);
  var some2 = _.keys(mockBlocks).splice(2, 2).map(blockForHash);
  var nodeMock, agent;
  var blockList = _.values(mockBlocks);
  beforeEach(function() {
    nodeMock = new EventEmitter();
    nodeMock.blockService = {};
    nodeMock.blockService.resolveBlock = function(block, blockHash) {
      if (_.isUndefined(block)) {
        return Promise.reject(new BitcoreNode.errors.Blocks.NotFound(blockHash));
      }
      return Promise.resolve(block);
    };
    nodeMock.blockService.getBlockByHeight = function(height) {
      var block = mockBlocks[_.keys(mockBlocks)[height - 100000]];
      return this.resolveBlock(block, height);
    };
    nodeMock.blockService.getBlock = function(blockHash) {
      var block = mockBlocks[blockHash];
      return this.resolveBlock(block, blockHash);

    };
    nodeMock.blockService.getLatest = function() {
      return Promise.resolve(lastBlock);
    };
    nodeMock.blockService.listBlocks = function(from, to, offset, limit) {
      var start = from - 1e5;
      var end = to - 1e5;
      var section = blockList.slice(start, end);
      var ret = section.slice(offset, offset + limit);
      return Promise.resolve(ret);
    };
    agent = require('../app')(nodeMock);
  });

  var toObject = function(b) {
    return b.toObject();
  };

  describe('/blocks', function() {
    it('works with default parameters', function(cb) {
      agent.get('/v1/blocks/?from=100000')
        .expect(200)
        .expect(blockList.map(toObject), cb);
    });
    it('fails with to<from', function(cb) {
      agent.get('/v1/blocks/?from=100000&to=99999')
        .expect(422)
        .expect('/v1/blocks/ "to" must be >= "from"', cb);
    });
    it('works with to/from parameters', function(cb) {
      agent.get('/v1/blocks/?from=100000&to=100001')
        .expect(200)
        .expect([firstBlock.toObject()], cb);
    });
    it('works with limit/offset parameters', function(cb) {
      agent.get('/v1/blocks/?from=100000&limit=1&offset=1')
        .expect(200)
        .expect([secondBlock.toObject()], cb);
    });
    it('works with all parameters', function(cb) {
      agent.get('/v1/blocks/?from=100005&to=100020&limit=3&offset=2')
        .expect(200)
        .expect(last3.map(toObject), cb);
    });
    it('works with all parameters 2', function(cb) {
      agent.get('/v1/blocks/?from=100000&to=100005&limit=2&offset=2')
        .expect(200)
        .expect(some2.map(toObject), cb);
    });
  });
  describe('/blocks/latest', function() {
    it('returns latest block', function(cb) {
      if (process.env.INTEGRATION === 'true') {
        // can't test this as latest block will always change
        return cb();
      }
      agent.get('/v1/blocks/latest')
        .expect(200)
        .expect(lastBlock.toObject(), cb);
    });
  });
  describe('/blocks/:blockHash', function() {
    it('fails with invalid blockHash', function(cb) {
      agent.get('/v1/blocks/abad1dea')
        .expect(422)
        .expect('/v1/blocks/ parameter must be a 64 digit hex or block height integer', cb);
    });
    it('returns 404 with non existent block', function(cb) {
      agent.get('/v1/blocks/000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b600000000')
        .expect(404)
        .expect('Block with id 000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b600000000 not found', cb);
    });
    _.keys(mockBlocks).forEach(function(hash) {
      var block = mockBlocks[hash];
      it('works with valid blockHash ...' + hash.substring(hash.length - 8), function(cb) {
        agent.get('/v1/blocks/' + hash)
          .expect(200)
          .expect(block.toJSON(), cb);
      });
    });
  });
  describe('/blocks/:height', function() {
    it('fails with invalid height', function(cb) {
      agent.get('/v1/blocks/-15')
        .expect(422)
        .expect('/v1/blocks/ parameter must be a 64 digit hex or block height integer', cb);
    });
    it('returns 404 with non existent block', function(cb) {
      agent.get('/v1/blocks/876543')
        .expect(404)
        .expect('Block with height 876543 not found', cb);
    });
    it('works with valid height', function(cb) {
      agent.get('/v1/blocks/100000')
        .expect(200)
        .expect(b1.toJSON(), cb);
    });
  });

});