const MszCommentsApi = (() => {
    return {
        getCategory: async name => {
            if(typeof name !== 'string')
                throw 'name must be a string';
            if(name.trim() === '')
                throw 'name may not be empty';

            const { status, body } = await $xhr.get(
                `/comments/categories/${name}`,
                { type: 'json' }
            );
            if(status === 404)
                throw 'that category does not exist';
            if(status !== 200)
                throw 'something went wrong';

            return body;
        },
        updateCategory: async (name, args) => {
            if(typeof name !== 'string')
                throw 'name must be a string';
            if(name.trim() === '')
                throw 'name may not be empty';
            if(typeof args !== 'object' || args === null)
                throw 'args must be a non-null object';

            const { status } = await $xhr.patch(
                `/comments/categories/${name}`,
                { csrf: true },
                args
            );

            return status;
        },
        getPost: async post => {
            if(typeof post !== 'string')
                throw 'post id must be a string';
            if(post.trim() === '')
                throw 'post id may not be empty';

            const { status, body } = await $xhr.get(
                `/comments/posts/${post}`,
                { type: 'json' }
            );
            if(status === 404)
                throw 'that post does not exist';
            if(status !== 200)
                throw 'something went wrong';

            return body;
        },
        getPostReplies: async post => {
            if(typeof post !== 'string')
                throw 'post id must be a string';
            if(post.trim() === '')
                throw 'post id may not be empty';

            const { status, body } = await $xhr.get(
                `/comments/posts/${post}/replies`,
                { type: 'json' }
            );
            if(status === 404)
                throw 'that post does not exist';
            if(status !== 200)
                throw 'something went wrong';

            return body;
        },
        createPost: async (post, args) => {
            if(typeof post !== 'string')
                throw 'post id must be a string';
            if(post.trim() === '')
                throw 'post id may not be empty';
            if(typeof args !== 'object' || args === null)
                throw 'args must be a non-null object';

            const { status, body } = await $xhr.post(
                '/comments/posts',
                { csrf: true },
                args
            );

            return status;
        },
        updatePost: async (post, args) => {
            //
        },
        deletePost: async post => {
            //
        },
        restorePost: async post => {
            if(typeof post !== 'string')
                throw 'post id must be a string';
            if(post.trim() === '')
                throw 'post id may not be empty';

            const { status } = await $xhr.post(`/comments/posts/${post}/restore`, { csrf: true });
            if(status === 400)
                throw 'that post is not deleted';
            if(status === 403)
                throw 'you are not allowed to restore posts';
            if(status === 404)
                throw 'that post does not exist';
            if(status !== 200)
                throw 'something went wrong';
        },
        createVote: async (post, vote) => {
            if(typeof post !== 'string')
                throw 'post id must be a string';
            if(post.trim() === '')
                throw 'post id may not be empty';
            if(typeof vote === 'string')
                vote = parseInt(vote);
            if(typeof vote !== 'number' || isNaN(vote))
                throw 'vote must be a number';

            const { status, body } = await $xhr.post(
                `/comments/posts/${post}/vote`,
                { csrf: true, type: 'json' },
                { vote }
            );
            if(status === 400)
                throw 'your vote is not acceptable';
            if(status === 403)
                throw 'you are not allowed to like or dislike comments';
            if(status === 404)
                throw 'that post does not exist';
            if(status !== 200)
                throw 'something went wrong';

            return body;
        },
        deleteVote: async post => {
            if(typeof post !== 'string')
                throw 'post id must be a string';
            if(post.trim() === '')
                throw 'post id may not be empty';

            const { status, body } = await $xhr.delete(
                `/comments/posts/${post}/vote`,
                { csrf: true, type: 'json' }
            );
            if(status === 403)
                throw 'you are not allowed to like or dislike comments';
            if(status === 404)
                throw 'that post does not exist';
            if(status !== 200)
                throw 'something went wrong';

            return body;
        },
    };
})();