import "reflect-metadata"
import { DataSource, DataSourceOptions } from "../../src/index"
import { Post } from "./entity/Post"
import { Author } from "./entity/Author"
import { Category } from "./entity/Category"
import { PostMetadata } from "./entity/PostMetadata"

const options: DataSourceOptions = {
    type: "mysql",
    host: "localhost",
    port: 3306,
    username: "root",
    password: "admin",
    database: "test",
    logging: ["query", "error"],
    synchronize: true,
    entities: [Post, Author, Category, PostMetadata],
}

const dataSource = new DataSource(options)
dataSource.initialize().then(
    (dataSource) => {
        let postRepository = dataSource.getRepository(Post)
        let authorRepository = dataSource.getRepository(Author)
        let categoryRepository = dataSource.getRepository(Category)
        let metadataRepository = dataSource.getRepository(PostMetadata)

        let category1 = categoryRepository.create()
        category1.name = "Hello category1"

        let category2 = categoryRepository.create()
        category2.name = "Bye category2"

        let author = authorRepository.create()
        author.name = "Umed"

        let metadata = metadataRepository.create()
        metadata.comment = "Metadata about post"

        let post = postRepository.create()
        post.text = "Hello how are you?"
        post.title = "hello"
        post.author = author
        post.metadata = metadata
        post.categories = [category1, category2]

        postRepository
            .save(post)
            .then((post) => {
                console.log("Post has been saved.")
                console.log(post)

                console.log("Now lets load posts with all their relations:")
                return postRepository.find({
                    join: {
                        alias: "post",
                        leftJoinAndSelect: {
                            author: "post.author",
                            metadata: "post.metadata",
                            categories: "post.categories",
                        },
                    },
                })

                // let secondPost = postRepository.create();
                // secondPost.text = "Second post";
                // secondPost.title = "About second post";
                // return authorRepository.save(author);
            })
            .then((post) => {
                console.log("Loaded posts: ", post)
            })
            /*    posts[0].title = "should be updated second post";

        return author.posts.then(posts => {
                return authorRepository.save(author);
            });
        })
        .then(updatedAuthor => {
            console.log("Author has been updated: ", updatedAuthor);
            console.log("Now lets load all posts with their authors:");
            return postRepository.find({ alias: "post", leftJoinAndSelect: { author: "post.author" } });
        })
        .then(posts => {
            console.log("Posts are loaded: ", posts);
            console.log("Now lets delete a post");
            posts[0].author = Promise.resolve(null);
            posts[1].author = Promise.resolve(null);
            return postRepository.save(posts[0]);
        })
        .then(posts => {
            console.log("Two post's author has been removed.");
            console.log("Now lets check many-to-many relations");

            let category1 = categoryRepository.create();
            category1.name = "Hello category1";

            let category2 = categoryRepository.create();
            category2.name = "Bye category2";

            let post = postRepository.create();
            post.title = "Post & Categories";
            post.text = "Post with many categories";
            post.categories = Promise.resolve([
                category1,
                category2
            ]);

            return postRepository.save(post);
        })
        .then(posts => {
            console.log("Post has been saved with its categories. ");
            console.log("Lets find it now. ");
            return postRepository.find({ alias: "post", innerJoinAndSelect: { categories: "post.categories" } });
        })
        .then(posts => {
            console.log("Post with categories are loaded: ", posts);
            console.log("Lets remove one of the categories: ");
            return posts[0].categories.then(categories => {
                categories.splice(0, 1);
                // console.log(posts[0]);
                return postRepository.save(posts[0]);
            });
        })*/
            .then((posts) => {
                // console.log("One of the post category has been removed.");
            })
            .catch((error) => console.log(error.stack))
    },
    (error) => console.log("Cannot connect: ", error),
)