import { Kysely, sql } from 'kysely';

export async function up(db: Kysely<any>) {
    await db.schema
        .createTable('schema_migration')
        .addColumn('version', 'char(16)')
        .addColumn('dirty', 'boolean')
        .execute();

    await db.schema
        .createTable('users')
        .addColumn('username', 'varchar(256)', col => col.primaryKey())
        .addColumn('password_hash', 'varchar(64)', col => col.notNull())
        .addColumn('password_salt', 'varchar(64)', col => col.notNull())
        .execute();

    await db.schema
        .createTable('document')
        .addColumn('id', 'serial', col => col.primaryKey())
        .addColumn('title', 'varchar(512)', col => col.notNull())
        .addColumn('content_type', 'varchar(16)', col => col.notNull())
        .addColumn('basepath', 'varchar(256)', col => col.notNull())
        .addColumn('filename', 'varchar(512)', col => col.notNull())
        .addColumn('content_hash', 'varchar')
        .addColumn('additional', 'json')
		.addColumn("pagenum", "integer", col => col.notNull())
        .addColumn('created_at', 'integer', col => col.notNull())
        .addColumn('modified_at', 'integer', col => col.notNull())
        .addColumn('deleted_at', 'integer')
        .execute();

    await db.schema
        .createTable('tags')
        .addColumn('name', 'varchar', col => col.primaryKey())
        .addColumn('description', 'text')
        .execute();

    await db.schema
        .createTable('doc_tag_relation')
        .addColumn('doc_id', 'integer', col => col.notNull())
        .addColumn('tag_name', 'varchar', col => col.notNull())
        .addForeignKeyConstraint('doc_id_fk', ['doc_id'], 'document', ['id'])
        .addForeignKeyConstraint('tag_name_fk', ['tag_name'], 'tags', ['name'])
        .addPrimaryKeyConstraint('doc_tag_relation_pk', ['doc_id', 'tag_name'])
        .execute();

    await db.schema
        .createTable('permissions')
        .addColumn('username', 'varchar', col => col.notNull())
        .addColumn('name', 'varchar', col => col.notNull())
        .addPrimaryKeyConstraint('permissions_pk', ['username', 'name'])
        .addForeignKeyConstraint('username_fk', ['username'], 'users', ['username'])
        .execute();

    // create admin account.
    await db
        .insertInto('users')
        .values({
            username: 'admin',
            password_hash: 'unchecked',
            password_salt: 'unchecked',
        })
        .execute();

	await db
		.insertInto('schema_migration')
		.values({
			version: '0.0.1',
			dirty: false,
		})
		.execute();
}

export async function down(db: Kysely<any>) {
    throw new Error('Downward migrations are not supported. Restore from backup.');
}