'use strict';

var _ = require('lodash');
var chai = require('chai');
var sinon = require('sinon');
var should = chai.should();
var prequest = require('../lib/blockchainexplorers/request-list');

describe('request-list', function() {
  var request;

  beforeEach(function() {
    request = sinon.stub();
  });
  it('should support url as string', function(done) {

    request.yields(null, {
      statusCode: 200
    }, 'abc');

    prequest({
      hosts: 'url1',
      request: request,
    }, function(err, res, body) {
      should.not.exist(err);
      body.should.be.equal('abc');
      res.statusCode.should.be.equal(200);
      done();
    });
  });
  it('should support url as string (500 response)', function(done) {
    request.yields(null, {
      statusCode: 500
    });
    prequest({
      hosts: 'url1',
      request: request,
    }, function(err, res, body) {
      should.not.exist(err);
      res.statusCode.should.be.equal(500);
      done();
    });
  });
  it('should support url as array of strings', function(done) {
    request.yields(null, {
      statusCode: 200
    }, 'abc');
    prequest({
      hosts: ['url1', 'url2'],
      request: request,
    }, function(err, res, body) {
      should.not.exist(err);
      body.should.be.equal('abc');
      done();
    });
  });
  it('should try 2nd url if first is unsuccessful (5xx)', function(done) {
    request.onCall(0).yields(null, {
      statusCode: 500
    });
    request.onCall(1).yields(null, {
      statusCode: 550
    });
    prequest({
      hosts: ['url1', 'url2'],
      request: request,
    }, function(err, res, body) {
      should.not.exist(err);
      res.statusCode.should.be.equal(550);
      done();
    });
  });
  it('should query 3th url if first 2 are unsuccessful (5xx)', function(done) {
    request.onCall(0).yields(null, {
      statusCode: 500
    });
    request.onCall(1).yields(null, {
      statusCode: 550
    });
    request.onCall(2).yields(null, {
      statusCode: 200,
    }, 'abc');
    prequest({
      hosts: ['url1', 'url2', 'url3'],
      request: request,
    }, function(err, res, body) {
      should.not.exist(err);
      body.should.be.equal('abc');
      done();
    });
  });
  it('should query only the first url if response is 404', function(done) {
    request.onCall(0).yields(null, {
      statusCode: 404
    });
    request.onCall(1).yields(null, {
      statusCode: 550
    });
    prequest({
      hosts: ['url1', 'url2'],
      request: request,
    }, function(err, res, body) {
      should.not.exist(err);
      res.statusCode.should.be.equal(404);
      done();
    });
  });
  it('should query only the first 2 urls if the second is successfull (5xx)', function(done) {
    request.onCall(0).yields(null, {
      statusCode: 500
    });
    request.onCall(1).yields(null, {
      statusCode: 200,
    }, '2nd');
    request.onCall(2).yields(null, {
      statusCode: 200,
    }, 'abc');
    prequest({
      hosts: ['url1', 'url2', 'url3'],
      request: request,
    }, function(err, res, body) {
      should.not.exist(err);
      body.should.be.equal('2nd');
      res.statusCode.should.be.equal(200);
      done();
    });
  });
  it('should query only the first 2 urls if the second is successfull (timeout)', function(done) {
    request.onCall(0).yields({
      code: 'ETIMEDOUT',
      connect: true
    });
    request.onCall(1).yields(null, {
      statusCode: 200,
    }, '2nd');
    request.onCall(2).yields(null, {
      statusCode: 200,
    }, 'abc');
    prequest({
      hosts: ['url1', 'url2', 'url3'],
      request: request,
    }, function(err, res, body) {
      should.not.exist(err);
      body.should.be.equal('2nd');
      res.statusCode.should.be.equal(200);
      done();
    });

  });
  it('should use the latest response if all requests are unsuccessfull', function(done) {
    request.onCall(0).yields({
      code: 'ETIMEDOUT',
      connect: true
    });
    request.onCall(1).yields(null, {
      statusCode: 505,
    }, '2nd');
    request.onCall(2).yields(null, {
      statusCode: 510,
    }, 'abc');
    prequest({
      hosts: ['url1', 'url2', 'url3'],
      request: request,
    }, function(err, res, body) {
      should.not.exist(err);
      res.statusCode.should.be.equal(510);
      done();
    });
  });
});