var assert = require('assert');
var async = require('async');
var describe = require('./describe');
var loopback = require('loopback');
var ACL = loopback.ACL;
var Change = loopback.Change;
var PersistedModel = loopback.PersistedModel;
var RemoteObjects = require('strong-remoting');
var TaskEmitter = require('strong-task-emitter');

module.exports = function defineModelTestsWithDataSource(options) {

describe('Model Tests', function() {

  var User, dataSource;

  if(options.beforeEach) {
    beforeEach(options.beforeEach);
  }

  beforeEach(function() {
    var test = this;

    // setup a model / datasource
    dataSource = this.dataSource || loopback.createDataSource(options.dataSource);

    var extend = PersistedModel.extend;

    // create model hook
    PersistedModel.extend = function() {
      var extendedModel = extend.apply(PersistedModel, arguments);

      if(options.onDefine) {
        options.onDefine.call(test, extendedModel);
      }

      return extendedModel;
    }

    User = PersistedModel.extend('user', {
      'first': String,
      'last': String,
      'age': Number,
      'password': String,
      'gender': String,
      'domain': String,
      'email': String
    }, {
      trackChanges: true
    });

    // enable destroy all for testing
    User.destroyAll.shared = true;
    User.attachTo(dataSource);
  });

  describe('Model.validatesPresenceOf(properties...)', function() {
    it("Require a model to include a property to be considered valid", function() {
      User.validatesPresenceOf('first', 'last', 'age');
      var joe = new User({first: 'joe'});
      assert(joe.isValid() === false, 'model should not validate');
      assert(joe.errors.last, 'should have a missing last error');
      assert(joe.errors.age, 'should have a missing age error');
    });
  });

  describe('Model.validatesLengthOf(property, options)', function() {
    it("Require a property length to be within a specified range", function() {
      User.validatesLengthOf('password', {min: 5, message: {min: 'Password is too short'}});
      var joe = new User({password: '1234'});
      assert(joe.isValid() === false, 'model should not be valid');
      assert(joe.errors.password, 'should have password error');
    });
  });

  describe('Model.validatesInclusionOf(property, options)', function() {
    it("Require a value for `property` to be in the specified array", function() {
      User.validatesInclusionOf('gender', {in: ['male', 'female']});
      var foo = new User({gender: 'bar'});
      assert(foo.isValid() === false, 'model should not be valid');
      assert(foo.errors.gender, 'should have gender error');
    });
  });

  describe('Model.validatesExclusionOf(property, options)', function() {
    it("Require a value for `property` to not exist in the specified array", function() {
      User.validatesExclusionOf('domain', {in: ['www', 'billing', 'admin']});
      var foo = new User({domain: 'www'});
      var bar = new User({domain: 'billing'});
      var bat = new User({domain: 'admin'});
      assert(foo.isValid() ===  false);
      assert(bar.isValid() === false);
      assert(bat.isValid() === false);
      assert(foo.errors.domain, 'model should have a domain error');
      assert(bat.errors.domain, 'model should have a domain error');
      assert(bat.errors.domain, 'model should have a domain error');
    });
  });

  describe('Model.validatesNumericalityOf(property, options)', function() {
    it("Require a value for `property` to be a specific type of `Number`", function() {
      User.validatesNumericalityOf('age', {int: true});
      var joe = new User({age: 10.2});
      assert(joe.isValid() === false);
      var bob = new User({age: 0});
      assert(bob.isValid() === true);
      assert(joe.errors.age, 'model should have an age error');
    });
  });

  describe('myModel.isValid()', function() {
    it("Validate the model instance", function() {
      User.validatesNumericalityOf('age', {int: true});
      var user = new User({first: 'joe', age: 'flarg'})
      var valid = user.isValid();
      assert(valid === false);
      assert(user.errors.age, 'model should have age error');
    });
    
    it('Asynchronously validate the model', function(done) {
      User.validatesNumericalityOf('age', {int: true});
      var user = new User({first: 'joe', age: 'flarg'});
      user.isValid(function (valid) {
        assert(valid === false);
        assert(user.errors.age, 'model should have age error');
        done();
      });
    });
  });

  describe('Model.create([data], [callback])', function() {
    it("Create an instance of Model with given data and save to the attached data source", function(done) {
      User.create({first: 'Joe', last: 'Bob'}, function(err, user) {
        assert(user instanceof User);
        done();
      });
    });
  });

  describe('model.save([options], [callback])', function() {
    it("Save an instance of a Model to the attached data source", function(done) {
      var joe = new User({first: 'Joe', last: 'Bob'});
      joe.save(function(err, user) {
        assert(user.id);
        assert(!err);
        assert(!user.errors);
        done();
      });
    });
  });

  describe('model.updateAttributes(data, [callback])', function() {
    it("Save specified attributes to the attached data source", function(done) {
      User.create({first: 'joe', age: 100}, function (err, user) {
        assert(!err);
        assert.equal(user.first, 'joe');
        
        user.updateAttributes({
          first: 'updatedFirst',
          last: 'updatedLast'
        }, function (err, updatedUser) {
          assert(!err);
          assert.equal(updatedUser.first, 'updatedFirst');
          assert.equal(updatedUser.last, 'updatedLast');
          assert.equal(updatedUser.age, 100);
          done();
        });
      });
    });
  });

  describe('Model.upsert(data, callback)', function() {
    it("Update when record with id=data.id found, insert otherwise", function(done) {
      User.upsert({first: 'joe', id: 7}, function (err, user) {
        assert(!err);
        assert.equal(user.first, 'joe');
        
        User.upsert({first: 'bob', id: 7}, function (err, updatedUser) {
          assert(!err);
          assert.equal(updatedUser.first, 'bob');
          done();
        });
      });
    });
  });

  describe('model.destroy([callback])', function() {
    it("Remove a model from the attached data source", function(done) {
      User.create({first: 'joe', last: 'bob'}, function (err, user) {
        User.findById(user.id, function (err, foundUser) {
          assert.equal(user.id, foundUser.id);
          foundUser.destroy(function () {
            User.findById(user.id, function (err, notFound) {
              assert.equal(notFound, null);
              done();
            });
          });
        });
      });
    });
  });

  describe('Model.deleteById(id, [callback])', function () {
      it("Delete a model instance from the attached data source", function (done) {
          User.create({first: 'joe', last: 'bob'}, function (err, user) {
              User.deleteById(user.id, function (err) {
                  User.findById(user.id, function (err, notFound) {
                    assert.equal(notFound, null);
                    done();
                  });
              });
          });
      });
  });

  describe('Model.findById(id, callback)', function() {
    it("Find an instance by id", function(done) {
      User.create({first: 'michael', last: 'jordan', id: 23}, function () {
        User.findById(23, function (err, user) {
          assert.equal(user.id, 23);
          assert.equal(user.first, 'michael');
          assert.equal(user.last, 'jordan');
          done();
        });
      });
    });
  });

  describe('Model.count([query], callback)', function() {
    it("Query count of Model instances in data source", function(done) {
      (new TaskEmitter())
        .task(User, 'create', {first: 'jill', age: 100})
        .task(User, 'create', {first: 'bob', age: 200})
        .task(User, 'create', {first: 'jan'})
        .task(User, 'create', {first: 'sam'})
        .task(User, 'create', {first: 'suzy'})
        .on('done', function () {
          User.count({age: {gt: 99}}, function (err, count) {
            assert.equal(count, 2);
            done();
          });
        });
    });
  });

});


}