/*globals describe, before, beforeEach, afterEach, after, it*/
/*jshint expr:true*/
var testUtils   = require('../utils'),
    should      = require('should'),
    sinon       = require('sinon'),
    when        = require('when'),
    _           = require('lodash'),
    Models = require('../../server/models'),

    // Stuff we are testing
    permissions = require('../../server/permissions'),
    effectivePerms = require('../../server/permissions/effective'),
    context = {context: {user: 1}};


describe('Permissions', function () {

    var sandbox;

    before(function (done) {
        testUtils.clearData().then(function () {
                done();
            }).catch(done);
    });

    afterEach(function (done) {
        sandbox.restore();
        testUtils.clearData()
            .then(function () {
                done();
            }).catch(done);
    });

    after(function (done) {
        testUtils.clearData().then(function () {
            done();
        }).catch(done);
    });

    var testPerms = [
            { act: 'edit', obj: 'post' },
            { act: 'edit', obj: 'tag' },
            { act: 'edit', obj: 'user' },
            { act: 'edit', obj: 'page' },
            { act: 'add', obj: 'post' },
            { act: 'add', obj: 'user' },
            { act: 'add', obj: 'page' },
            { act: 'destroy', obj: 'post' },
            { act: 'destroy', obj: 'user' }
        ],
        currTestPermId = 1,

        createPermission = function (name, act, obj) {
            if (!name) {
                currTestPermId += 1;
                name = 'test' + currTestPermId;
            }

            var newPerm = {
                name: name,
                action_type: act,
                object_type: obj
            };

            return Models.Permission.add(newPerm, context);
        },
        createTestPermissions = function () {
            var createActions = _.map(testPerms, function (testPerm) {
                return createPermission(null, testPerm.act, testPerm.obj);
            });

            return when.all(createActions);
        };

    describe('Init Permissions', function () {

        beforeEach(function (done) {
            sandbox = sinon.sandbox.create();
            testUtils.initData()
                .then(testUtils.insertDefaultUser)
                .then(testUtils.insertDefaultApp)
                .then(function () {
                    done();
                }).catch(done);
        });

        it('can load an actions map from existing permissions', function (done) {
            createTestPermissions()
                .then(permissions.init)
                .then(function (actionsMap) {
                    should.exist(actionsMap);

                    actionsMap.edit.sort().should.eql(['post', 'tag', 'user', 'page', 'theme', 'setting'].sort());

                    actionsMap.should.equal(permissions.actionsMap);

                    done();
                }).catch(done);
        });

        it('can add user to role', function (done) {
            var existingUserRoles;

            Models.User.findOne({id: 1}, { withRelated: ['roles'] }).then(function (foundUser) {
                var testRole = new Models.Role({
                    name: 'testrole1',
                    description: 'testrole1 description'
                });

                should.exist(foundUser);

                should.exist(foundUser.roles());

                existingUserRoles = foundUser.related('roles').length;

                return testRole.save(null, context).then(function () {
                    return foundUser.roles().attach(testRole);
                });
            }).then(function () {
                return Models.User.findOne({id: 1}, { withRelated: ['roles'] });
            }).then(function (updatedUser) {
                should.exist(updatedUser);

                updatedUser.related('roles').length.should.equal(existingUserRoles + 1);

                done();
            }).catch(done);
        });

        it('can add user permissions', function (done) {
            Models.User.findOne({id: 1}, { withRelated: ['permissions']}).then(function (testUser) {
                var testPermission = new Models.Permission({
                    name: 'test edit posts',
                    action_type: 'edit',
                    object_type: 'post'
                });

                testUser.related('permissions').length.should.equal(0);

                return testPermission.save(null, context).then(function () {
                    return testUser.permissions().attach(testPermission);
                });
            }).then(function () {
                return Models.User.findOne({id: 1}, { include: ['permissions']});
            }).then(function (updatedUser) {
                should.exist(updatedUser);

                updatedUser.related('permissions').length.should.equal(1);

                done();
            }).catch(done);
        });

        it('can add role permissions', function (done) {
            var testRole = new Models.Role({
                name: 'test2',
                description: 'test2 description'
            });

            testRole.save(null, context)
                .then(function () {
                    return testRole.load('permissions');
                })
                .then(function () {
                    var rolePermission = new Models.Permission({
                        name: 'test edit posts',
                        action_type: 'edit',
                        object_type: 'post'
                    });

                    testRole.related('permissions').length.should.equal(0);

                    return rolePermission.save(null, context).then(function () {
                        return testRole.permissions().attach(rolePermission);
                    });
                })
                .then(function () {
                    return Models.Role.findOne({id: testRole.id}, { withRelated: ['permissions']});
                })
                .then(function (updatedRole) {
                    should.exist(updatedRole);

                    updatedRole.related('permissions').length.should.equal(1);

                    done();
                }).catch(done);
        });

    });

    describe('With Permissions', function () {

        beforeEach(function (done) {
            sandbox = sinon.sandbox.create();
            testUtils.initData()
                .then(testUtils.insertDefaultUser)
                .then(testUtils.insertDefaultApp)
                .then(function () {
                    done();
                }).catch(done);
        });


        it('does not allow edit post without permission', function (done) {
            var fakePage = {
                    id: 1
                };

            createTestPermissions()
                .then(permissions.init)
                .then(function () {
                    return Models.User.findOne({id: 1});
                })
                .then(function (foundUser) {
                    var canThisResult = permissions.canThis(foundUser);

                    should.exist(canThisResult.edit);
                    should.exist(canThisResult.edit.post);

                    return canThisResult.edit.page(fakePage);
                })
                .then(function () {
                    done(new Error('was able to edit post without permission'));
                }).catch(done);
        });

        it('allows edit post with permission', function (done) {
            var fakePost = {
                    id: '1'
                };

            createTestPermissions()
                .then(permissions.init)
                .then(function () {
                    return Models.User.findOne({id: 1});
                })
                .then(function (foundUser) {
                    var newPerm = new Models.Permission({
                        name: 'test3 edit post',
                        action_type: 'edit',
                        object_type: 'post'
                    });

                    return newPerm.save(null, context).then(function () {
                        return foundUser.permissions().attach(newPerm);
                    });
                })
                .then(function () {
                    return Models.User.findOne({id: 1}, { withRelated: ['permissions']});
                })
                .then(function (updatedUser) {

                    // TODO: Verify updatedUser.related('permissions') has the permission?
                    var canThisResult = permissions.canThis(updatedUser.id);

                    should.exist(canThisResult.edit);
                    should.exist(canThisResult.edit.post);

                    return canThisResult.edit.post(fakePost);
                })
                .then(function () {
                    done();
                }).catch(done);
        });

        it('can use permissable function on Model to allow something', function (done) {
            var testUser,
                permissableStub = sandbox.stub(Models.Post, 'permissable', function () {
                    return when.resolve();
                });

            testUtils.insertAuthorUser()
                .then(function () {
                    return Models.User.findAll();
                })
                .then(function (foundUser) {
                    testUser = foundUser.models[1];

                    return permissions.canThis({user: testUser.id}).edit.post(123);
                })
                .then(function () {
                    permissableStub.restore();
                    permissableStub.calledWith(123, { user: testUser.id, app: null, internal: false })
                        .should.equal(true);

                    done();
                })
                .catch(function () {
                    permissableStub.restore();

                    done(new Error('did not allow testUser'));
                });
        });

        it('can use permissable function on Model to forbid something', function (done) {
            var testUser,
                permissableStub = sandbox.stub(Models.Post, 'permissable', function () {
                    return when.reject();
                });

            testUtils.insertAuthorUser()
                .then(function () {
                    return Models.User.findAll();
                })
                .then(function (foundUser) {
                    testUser = foundUser.models[1];

                    return permissions.canThis({user: testUser.id}).edit.post(123);
                })
                .then(function () {

                    permissableStub.restore();
                    done(new Error('Allowed testUser to edit post'));
                })
                .catch(function () {
                    permissableStub.calledWith(123, { user: testUser.id, app: null, internal: false })
                        .should.equal(true);
                    permissableStub.restore();
                    done();
                });
        });

        it('can get effective user permissions', function (done) {
            effectivePerms.user(1).then(function (effectivePermissions) {
                should.exist(effectivePermissions);

                effectivePermissions.length.should.be.above(0);

                done();
            }).catch(done);
        });

        it('can check an apps effective permissions', function (done) {
            effectivePerms.app('Kudos')
                .then(function (effectivePermissions) {
                    should.exist(effectivePermissions);

                    effectivePermissions.length.should.be.above(0);

                    done();
                })
                .catch(done);
        });

        it('does not allow an app to edit a post without permission', function (done) {
            // Change the author of the post so the author override doesn't affect the test
            Models.Post.edit({'author_id': 2}, _.extend(context, {id: 1}))
                .then(function (updatedPost) {
                    // Add user permissions
                    return Models.User.findOne({id: 1})
                        .then(function (foundUser) {
                            var newPerm = new Models.Permission({
                                name: 'app test edit post',
                                action_type: 'edit',
                                object_type: 'post'
                            });

                            return newPerm.save(null, context).then(function () {
                                return foundUser.permissions().attach(newPerm).then(function () {
                                    return when.all([updatedPost, foundUser]);
                                });
                            });
                        });
                })
                .then(function (results) {
                    var updatedPost = results[0],
                        updatedUser = results[1];

                    return permissions.canThis({ user: updatedUser.id })
                        .edit
                        .post(updatedPost.id)
                        .then(function () {
                            return results;
                        })
                        .catch(function (err) {
                            /*jshint unused:false */
                            done(new Error('Did not allow user 1 to edit post 1'));
                        });
                })
                .then(function (results) {
                    var updatedPost = results[0],
                        updatedUser = results[1];

                    // Confirm app cannot edit it.
                    return permissions.canThis({ app: 'Hemingway', user: updatedUser.id })
                        .edit
                        .post(updatedPost.id)
                        .then(function () {
                            done(new Error('Allowed an edit of post 1'));
                        }).catch(done);
                }).catch(done);
        });

        it('allows an app to edit a post with permission', function (done) {
            permissions.canThis({ app: 'Kudos', user: 1 })
                .edit
                .post(1)
                .then(function () {
                    done();
                })
                .catch(function () {
                    done(new Error('Did not allow an edit of post 1'));
                });
        });

        it('checks for null context passed and rejects', function (done) {
            permissions.canThis(undefined)
                .edit
                .post(1)
                .then(function () {
                    done(new Error('Should not allow editing post'));
                })
                .catch(done);
        });

        it('allows \'internal\' to be passed for internal requests', function (done) {
            // Using tag here because post implements the custom permissable interface
            permissions.canThis('internal')
                .edit
                .tag(1)
                .then(function () {
                    done();
                })
                .catch(function () {
                    done(new Error('Should allow editing post with "internal"'));
                });
        });

        it('allows { internal: true } to be passed for internal requests', function (done) {
            // Using tag here because post implements the custom permissable interface
            permissions.canThis({ internal: true })
                .edit
                .tag(1)
                .then(function () {
                    done();
                })
                .catch(function () {
                    done(new Error('Should allow editing post with { internal: true }'));
                });
        });
    });
});