import * as Knex from "knex";


export async function up(knex: Knex): Promise<void> {
    // Songs table.
    await knex.schema.createTable(
        'songs',
        (table: any) => {
            table.increments('id');
            table.string('title');
            table.json('storeLinks')
        }
    )

    // Artists table.
    await knex.schema.createTable(
        'artists',
        (table: any) => {
            table.increments('id');
            table.string('name');
            table.json('storeLinks');
        }
    )

    // Albums table.
    await knex.schema.createTable(
        'albums',
        (table: any) => {
            table.increments('id');
            table.string('name');
            table.json('storeLinks');
        }
    )

    // Tags table.
    await knex.schema.createTable(
        'tags',
        (table: any) => {
            table.increments('id');
            table.string('name');
            table.integer('parentId');
        }
    )

    // Songs <-> Artists
    await knex.schema.createTable(
        'songs_artists',
        (table: any) => {
            table.increments('id');
            table.integer('songId');
            table.integer('artistId');
        }
    )

    // Songs <-> Albums
    await knex.schema.createTable(
        'songs_albums',
        (table: any) => {
            table.increments('id');
            table.integer('songId');
            table.integer('albumId');
        }
    )

    // Songs <-> Tags
    await knex.schema.createTable(
        'songs_tags',
        (table: any) => {
            table.increments('id');
            table.integer('songId');
            table.integer('tagId');
        }
    )

    // Artists <-> Tags
    await knex.schema.createTable(
        'artists_tags',
        (table: any) => {
            table.increments('id');
            table.integer('artistId');
            table.integer('tagId');
        }
    )

    // Albums <-> Tags
    await knex.schema.createTable(
        'albums_tags',
        (table: any) => {
            table.increments('id');
            table.integer('tagId');
            table.integer('albumId');
        }
    )

    // Artists <-> Albums
    await knex.schema.createTable(
        'artists_albums',
        (table: any) => {
            table.increments('id');
            table.integer('artistId');
            table.integer('albumId');
        }
    )
}


export async function down(knex: Knex): Promise<void> {
    await knex.schema.dropTable('songs');
    await knex.schema.dropTable('artists');
    await knex.schema.dropTable('albums');
    await knex.schema.dropTable('tags');
    await knex.schema.dropTable('songs_artists');
    await knex.schema.dropTable('songs_albums');
    await knex.schema.dropTable('songs_tags');
    await knex.schema.dropTable('artists_tags');
    await knex.schema.dropTable('albums_tags');
}