/* global describe, it, before, afterEach */

'use strict'

var _ = require('lodash')
var should = require('chai').should()
var mockery = require('mockery')

var config = require('./mocks/config.json')
var CONFIG = _.cloneDeep(config)
function requireFreshConfig () {
  return _.cloneDeep(CONFIG)
}

var walletMock = require('./mocks/wallet')
var tickerMock = require('./mocks/ticker')
var traderMock = require('./mocks/trader')
var verifierMock = require('./mocks/verifier')
var infoMock = require('./mocks/info')

mockery.registerMock('lamassu-mockWallet', walletMock)
mockery.registerMock('lamassu-mockTicker', tickerMock)
mockery.registerMock('lamassu-mockTrader', traderMock)
mockery.registerMock('lamassu-mockVerifier', verifierMock)
mockery.registerMock('lamassu-mockInfo', infoMock)

describe('Plugins', function () {
  var plugins = null

  before(function () {
    mockery.enable({
      useCleanCache: true,
      warnOnReplace: false,
      warnOnUnregistered: false
    })

    plugins = require('../lib/plugins')
  })

  afterEach(function () {
    config = requireFreshConfig()
  })

  it('should properly load', function () {
    should.exist(plugins)
  })

  it('should throw when db is not provided', function () {
    plugins.init.should.throw(/db.*required/)
  })

  it('should throw when invalid balance margin', function () {
    config.exchanges.settings.lowBalanceMargin = 0.99

    function configurer () {
      plugins.configure(config)
    }
    configurer.should.throw(/lowBalanceMargin/)
  })

  it('should throw when module is not installed', function () {
    config.exchanges.plugins.current.ticker = 'inexistent-plugin'

    function configurer () {
      plugins.configure(config)
    }
    configurer.should.throw(/module.*not installed/)
  })

  it('should throw when used plugin has no SUPPORTED_MODULES', function () {
    var tmp = tickerMock.SUPPORTED_MODULES
    delete tickerMock.SUPPORTED_MODULES

    function configurer () {
      plugins.configure(config)
    }
    configurer.should.throw(/required.*SUPPORTED_MODULES/)

    tickerMock.SUPPORTED_MODULES = tmp
  })

  it('should throw when used plugin has required method missing', function () {
    var tmp = tickerMock.ticker
    delete tickerMock.ticker

    function configurer () {
      plugins.configure(config)
    }
    configurer.should.throw(/fails.*implement.*method/)

    tickerMock.ticker = tmp
  })

  describe('should configure all enabled plugins', function () {
    var confList = {}

    before(function () {
      function configTest (name) {
        return function config (localConfig) {
          should.exist(config)
          /* jshint expr: true */
          localConfig.should.be.an.Object
          /* jshint expr: false */
          confList[name] = config
        }
      }

      walletMock.config = configTest('wallet')
      tickerMock.config = configTest('ticker')
      traderMock.config = configTest('trader')
      verifierMock.config = configTest('verifier')
      infoMock.config = configTest('info')

      plugins.configure(config)
    })

    ;['wallet', 'ticker', 'trader', 'verifier', 'info'].forEach(function (name) {
      it('should configure ' + name, function () {
        confList.should.have.property(name)
        should.exist(confList[name])
        /* jshint expr: true */
        confList[name].should.be.an.Object
      /* jshint expr: false */
      })
    })

    it('should return config', function () {
      var config = plugins.getConfig()
      should.exist(config)
      /* jshint expr: true */
      config.should.be.an.Object
      /* jshint expr: false */
    })
  })

  describe('Ticker', function () {
    it('should have called .ticker() at least once', function () {
      tickerMock.getTickerCalls().should.be.at.least(1)
    })

    it('should return last ticker price', function () {
      var rate = plugins.getDeviceRate()
      should.exist(rate)
      /* jshint expr: true */
      rate.should.be.an.Object
      /* jshint expr: false */
      rate.should.have.property('currency')
      rate.should.have.property('rates')

      var rates = rate.rates
      /* jshint expr: true */
      rate.should.be.an.Object
      /* jshint expr: false */
      rates.should.have.property('ask')
      rates.should.have.property('bid')
    })
  })

  describe('Wallet', function () {
    var db = require('./mocks/db')

    before(function () {
      plugins.init(db)
    })

    it('should have called .balance() at least once', function () {
      walletMock.getBalanceCalls().should.be.at.least(1)
    })

    it('should return BTC balance', function () {
      var balance = plugins.getBalance()
      should.exist(balance)
      /* jshint expr: true */
      balance.should.be.an.Object
      /* jshint expr: false */
      balance.should.have.property('BTC')
      balance.BTC.should.equal(1e8)
    })

    it('should return fiat balance', function () {
      var fiatBalance = plugins.fiatBalance()
      should.exist(fiatBalance)
      /* jshint expr: true */
      fiatBalance.should.be.a.Number
      /* jshint expr: false */
      fiatBalance.should.be.below(999)
    })

    describe('Send Bitcoins', function () {
      before(function () {
        plugins.trade({currency: 'USD', satoshis: 1e7}, db.FINGERPRINT_NEW)
      })

      it('should send bitcoins successfully', function (done) {
        var txDetails = {
          txId: 1,
          toAddress: walletMock.ADDR,
          satoshis: 1e7
        }

        plugins.sendCoins(db.FINGERPRINT_NEW, txDetails, function (err,
          response) {
          should.not.exist(err)
          should.exist(response)
          /* jshint expr: true */
          response.should.be.an.Object
          response.should.have.property('statusCode')
          response.statusCode.should.equal(201)
          /* jshint expr: false */

          done()
        })
      })

      // // this fail comes from external plugin
      // it('should fail when not enough funds', function(done) {
      //   notEnoughFundsTx(function() {

      //     /* jshint expr: true */
      //     db.wasErrorReported().should.be.true
      //     /* jshint expr: false */
      //     done()
      //   })
      // })

      // // this once comes from plugins.js
      // it('should fail again', function(done) {
      //   notEnoughFundsTx(function() {

    //     /* jshint expr: true */
    //     db.wasErrorReported().should.be.false // should not report error again
    //     /* jshint expr: false */
    //     done()
    //   })
    // })
    })
  })

  describe('Trader', function () {})
})