//import {
//    PostCollection,
//    CategoryCollection,
//    CommentCollection,
//    ResolverCollection
//} from './collections.js';

let PostCollection = new Mongo.Collection('test_post');
let CategoryCollection = new Mongo.Collection('test_category');
let CommentCollection = new Mongo.Collection('test_comment');
let ResolverCollection = new Mongo.Collection('test_resolver');

PostCollection.attachSchema(new SimpleSchema({
    text: {type: String}
}));
CommentCollection.attachSchema(new SimpleSchema({
    text: {type: String}
}));
CategoryCollection.attachSchema(new SimpleSchema({
    text: {type: String}
}));
ResolverCollection.attachSchema(new SimpleSchema({
    resourceId: {type: String}
}));

PostCollection.addLinks({
    'comments': {
        type: '*',
        collection: CommentCollection,
        field: 'commentIds',
        index: true
    },
    'autoRemoveComments': {
        type: '*',
        collection: CommentCollection,
        field: 'autoRemoveIds',
        autoremove: true
    },
    'autoRemovingSelfComments': {
        type: '*',
        collection: CommentCollection,
        field: 'autoRemovingSelfCommentsIds',
    },
    'metaComments': {
        type: '*',
        collection: CommentCollection,
        metadata: {
            approved: {type: Boolean, optional: true},
            date: {type: Date, optional: true},
            updated: {type: Date, optional: true}
        }
    },
    category: {
        collection: CategoryCollection,
        type: '1'
    },
    metaCategory: {
        metadata: {},
        collection: CategoryCollection,
        type: '1'
    },
    pictures: {
        resolve(object) {
            return ResolverCollection.find({
                resourceId: object._id
            }).fetch();
        }
    },
    inversedComment: {
        collection: CommentCollection,
        inversedBy: 'inversedPost'
    }
});

CommentCollection.addLinks({
    post: {
        collection: PostCollection,
        inversedBy: 'comments'
    },
    inversedPost: {
        collection: PostCollection,
        field: 'postId'
    },
    autoRemovePosts: {
        collection: PostCollection,
        inversedBy: 'autoRemovingSelfComments',
        autoremove: true
    },
    metaPost: {
        collection: PostCollection,
        inversedBy: 'metaComments'
    }
});

CategoryCollection.addLinks({
    'posts': {
        collection: PostCollection,
        inversedBy: 'category'
    },
    'metaPosts': {
        collection: PostCollection,
        inversedBy: 'metaCategory'
    }
});

describe('Collection Links', function () {
    PostCollection.remove({});
    CategoryCollection.remove({});
    CommentCollection.remove({});
    ResolverCollection.remove({});

    it('Test Many', function () {
        let postId = PostCollection.insert({'text': 'abc'});
        let commentId = CommentCollection.insert({'text': 'abc'});

        let post = PostCollection.findOne(postId);
        const link = PostCollection.getLink(post, 'comments');
        link.add(commentId);
        assert.lengthOf(link.find().fetch(), 1);

        link.remove(commentId);
        assert.lengthOf(link.find().fetch(), 0);
    });

    it('Tests One', function () {
        let postId = PostCollection.insert({'text': 'abc'});
        let categoryId = CategoryCollection.insert({'text': 'abc'});

        let post = PostCollection.findOne(postId);

        const link = PostCollection.getLink(post, 'category');
        link.set(categoryId);
        assert.lengthOf(link.find().fetch(), 1);

        assert.equal(categoryId, link.fetch()._id);

        link.unset();
        assert.lengthOf(link.find().fetch(), 0);
    });

    it('Tests One Meta', function () {
        let postId = PostCollection.insert({'text': 'abc'});
        let categoryId = CategoryCollection.insert({'text': 'abc'});

        let post = PostCollection.findOne(postId);

        let link = PostCollection.getLink(post, 'metaCategory');
        link.set(categoryId, {date: new Date()});

        assert.lengthOf(link.find().fetch(), 1);
        let metadata = link.metadata();

        assert.isObject(metadata);
        assert.instanceOf(metadata.date, Date);

        link.metadata({
            updated: new Date()
        });

        post = PostCollection.findOne(postId);
        link = PostCollection.getLink(post, 'metaCategory');
        assert.instanceOf(link.metadata().updated, Date);

        link.unset();
        assert.lengthOf(link.find().fetch(), 0);
    });

    it('Tests Many Meta', function () {
        let postId = PostCollection.insert({'text': 'abc'});
        let commentId = CommentCollection.insert({'text': 'abc'});

        let post = PostCollection.findOne(postId);
        let metaCommentsLink = PostCollection.getLink(post, 'metaComments');

        metaCommentsLink.add(commentId, {date: new Date});
        assert.lengthOf(metaCommentsLink.find().fetch(), 1);

        // verifying reverse search
        let metaComment = CommentCollection.findOne(commentId);
        let metaPostLink = CommentCollection.getLink(metaComment, 'metaPost');
        assert.lengthOf(metaPostLink.find().fetch(), 1);

        let metadata = metaCommentsLink.metadata(commentId);

        assert.isObject(metadata);
        assert.instanceOf(metadata.date, Date);

        metaCommentsLink.metadata(commentId, {updated: new Date});

        post = PostCollection.findOne(postId);
        metaCommentsLink = PostCollection.getLink(post, 'metaComments');

        metadata = metaCommentsLink.metadata(commentId);
        assert.instanceOf(metadata.updated, Date);

        metaCommentsLink.remove(commentId);
        assert.lengthOf(metaCommentsLink.find().fetch(), 0);
    });

    it('Tests $meta filters for One & One-Virtual', function () {
        let postId = PostCollection.insert({'text': 'abc'});
        let categoryId = CategoryCollection.insert({'text': 'abc'});
        let post = PostCollection.findOne(postId);
        let postMetaCategoryLink = PostCollection.getLink(post, 'metaCategory');
        postMetaCategoryLink.set(categoryId, {valid: true});

        let result = postMetaCategoryLink.fetch({$meta: {valid: true}});
        assert.isObject(result);

        result = postMetaCategoryLink.fetch({$meta: {valid: false}});

        assert.isUndefined(result);
        const metaCategoryPostLink = CategoryCollection.getLink(categoryId, 'metaPosts');

        result = metaCategoryPostLink.fetch({$meta: {valid: true}});
        assert.lengthOf(result, 1);

        result = metaCategoryPostLink.fetch({$meta: {valid: false}});
        assert.lengthOf(result, 0);
    });

    it('Tests $meta filters for Many & Many-Virtual', function () {
        let postId = PostCollection.insert({'text': 'abc'});
        let commentId1 = CommentCollection.insert({'text': 'abc'});
        let commentId2 = CommentCollection.insert({'text': 'abc'});

        let postMetaCommentsLink = PostCollection.getLink(postId, 'metaComments');

        postMetaCommentsLink.add(commentId1, {approved: true});
        postMetaCommentsLink.add(commentId2, {approved: false});

        let result = postMetaCommentsLink.fetch({$meta: {approved: true}});

        assert.lengthOf(result, 1);

        result = postMetaCommentsLink.fetch({$meta: {approved: false}});

        assert.lengthOf(result, 1);

        const comment1MetaPostsLink = CommentCollection.getLink(commentId1, 'metaPost');
        result = comment1MetaPostsLink.fetch({$meta: {approved: true}});
        assert.lengthOf(result, 1);
        result = comment1MetaPostsLink.fetch({$meta: {approved: false}});
        assert.lengthOf(result, 0);

        const comment2MetaPostsLink = CommentCollection.getLink(commentId2, 'metaPost');
        result = comment2MetaPostsLink.fetch({$meta: {approved: true}});
        assert.lengthOf(result, 0);
        result = comment2MetaPostsLink.fetch({$meta: {approved: false}});
        assert.lengthOf(result, 1);
    });

    it('Tests inversedBy findings', function () {
        let postId = PostCollection.insert({'text': 'abc'});
        let commentId = CommentCollection.insert({'text': 'abc'});

        let post = PostCollection.findOne(postId);
        let comment = CommentCollection.findOne(commentId);
        let commentsLink = PostCollection.getLink(post, 'comments');
        let metaCommentsLink = PostCollection.getLink(post, 'metaComments');
        let postLink = CommentCollection.getLink(comment, 'post');
        let postMetaLink = CommentCollection.getLink(comment, 'metaPost');

        commentsLink.add(comment);
        metaCommentsLink.add(comment);
        assert.lengthOf(postLink.find().fetch(), 1);
        assert.lengthOf(postMetaLink.find().fetch(), 1);

        CommentCollection.remove(comment._id);
        post = PostCollection.findOne(postId);
        assert.notInclude(post.commentIds, comment._id);
    });

    it('Tests proper resolver', function () {
        let postId = PostCollection.insert({'text': 'abc'});
        let uploadId = ResolverCollection.insert({'resourceId': postId});

        let post = PostCollection.findOne(postId);
        const link = PostCollection.getLink(post, 'pictures');

        assert.lengthOf(link.fetch(), 1);
    });

    it ('Should auto-save object', function () {
        let comment = {text: 'abc'};

        let postId = PostCollection.insert({text: 'hello'});
        const postLink = PostCollection.getLink(postId, 'comments').add(comment);

        assert.isDefined(comment._id);
        assert.lengthOf(postLink.fetch(), 1);
    });

    it ('Should have indexes set up', function () {
        const raw = PostCollection.rawCollection();
        const indexes = Meteor.wrapAsync(raw.indexes, raw)();

        const found = _.find(indexes, index => {
            return index.key.commentIds == 1;
        });

        assert.isObject(found);
    });

    it ('Should auto-remove some objects', function () {
        let comment = {text: 'abc'};

        let postId = PostCollection.insert({text: 'hello'});
        let postLink = PostCollection.getLink(postId, 'comments').add(comment);

        assert.isNotNull(comment._id);
        PostCollection.remove(postId);
        assert.isNotNull(CommentCollection.findOne(comment._id));

        comment = {text: 'abc'};
        postId = PostCollection.insert({text: 'hello'});
        postLink = PostCollection.getLink(postId, 'autoRemoveComments').add(comment);

        assert.isDefined(comment._id);
        PostCollection.remove(postId);
        assert.isUndefined(CommentCollection.findOne(comment._id));
    });

    it('Should allow actions from inversed links', function () {
        let comment = {text: 'abc'};

        let postId = PostCollection.insert({text: 'hello'});
        const commentId = CommentCollection.insert(comment);

        CommentCollection.getLink(commentId, 'post').set(postId);

        assert.lengthOf(PostCollection.getLink(postId, 'comments').fetch(), 1);

        CommentCollection.getLink(commentId, 'post').add({text: 'hi there'});

        let insertedPostViaVirtual = PostCollection.findOne({text: 'hi there'});
        assert.isObject(insertedPostViaVirtual);

        assert.lengthOf(PostCollection.getLink(insertedPostViaVirtual, 'comments').fetch(), 1);

        const category = CategoryCollection.findOne();
        let postsCategoryLink = CategoryCollection.getLink(category, 'posts');
        postsCategoryLink.add(insertedPostViaVirtual);

        assert.equal(category._id, PostCollection.getLink(insertedPostViaVirtual, 'category').fetch()._id);

        // TESTING META
        let categoryMetaPostLink = CategoryCollection.getLink(category, 'metaPosts');
        categoryMetaPostLink.add(insertedPostViaVirtual, {testValue: 'boom!'});

        let postMetaCategoryLink = PostCollection.getLink(insertedPostViaVirtual, 'metaCategory');
        assert.equal('boom!', postMetaCategoryLink.metadata().testValue);
    });

    it('Should fail when you try to add a non-existing link', function (done) {
        let postId = PostCollection.insert({text: 'hello'});

        try {
            PostCollection.getLink(postId, 'comments').add('XXXXXXX');
        } catch (e) {
            assert.equal(e.error, 'not-found');
            done();
        }
    });

    it('Should work with autoremoval from inversed and direct link', function () {
        // autoremoval from direct side
        let postId = PostCollection.insert({text: 'autoremove'});
        const postAutoRemoveCommentsLink = PostCollection.getLink(postId, 'autoRemoveComments');

        postAutoRemoveCommentsLink.add({text: 'hello'});

        assert.lengthOf(postAutoRemoveCommentsLink.find().fetch(), 1);
        let commentId = postAutoRemoveCommentsLink.find().fetch()[0]._id;

        assert.isObject(CommentCollection.findOne(commentId));
        PostCollection.remove(postId);
        assert.isUndefined(CommentCollection.findOne(commentId));


        // now from inversed side
        commentId = CommentCollection.insert({text: 'autoremove'});

        const commentAutoRemovePostsLink = CommentCollection.getLink(commentId, 'autoRemovePosts');
        commentAutoRemovePostsLink.add({text: 'Hello'});

        assert.lengthOf(commentAutoRemovePostsLink.find().fetch(), 1);
        postId = commentAutoRemovePostsLink.find().fetch()[0]._id;

        assert.isObject(PostCollection.findOne(postId));
        CommentCollection.remove(commentId);
        assert.isUndefined(PostCollection.findOne(postId));
    })
});