<?php

declare(strict_types=1);

namespace OCA\UPschooling\Migration;

use Closure;
use OCP\DB\ISchemaWrapper;
use OCP\Migration\IOutput;
use OCP\Migration\SimpleMigrationStep;

class Version000000Date20210918151800 extends SimpleMigrationStep {

	/**
	 * @param IOutput $output
	 * @param Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
	 * @param array $options
	 * @return null|ISchemaWrapper
	 */
	public function changeSchema(IOutput $output, Closure $schemaClosure, array $options) {
		/** @var ISchemaWrapper $schema */
		$schema = $schemaClosure();

		if (!$schema->hasTable('upschooling_tickets')) {
			$table = $schema->createTable('upschooling_tickets');
			$table->addColumn('id', 'integer', [
				'autoincrement' => true,
				'notnull' => true,
			]);
			$table->addColumn('matrix_control_room', 'string', [
				'notnull' => true,
				'length' => 200,
			]);
			$table->addColumn('matrix_assisted_user', 'string', [
				'notnull' => true,
				'length' => 200,
			]);
			$table->addColumn('matrix_helper_user', 'string', [
				'notnull' => false,
				'length' => 200,
				// could be optimized by having a "localUser" with foreign key to users.id,
				// but that could create consistency issues
			]);

			$table->addColumn('status', 'string', [
				'notnull' => true,
				'length' => 63,
			]);
			$table->addColumn('version', 'integer', [
				'notnull' => true,
			]);

			$table->setPrimaryKey(['id']);
			$table->addUniqueConstraint(['matrix_control_room'], 'upschooling_mx_room_id_uniq');
			$table->addIndex(['matrix_control_room'], 'upschooling_mx_room_id_idx');
		}

		if (!$schema->hasTable('upschooling_users')) {
			$table = $schema->createTable('upschooling_users');
			$table->addColumn('id', 'integer', [
				'autoincrement' => true,
				'notnull' => true,
			]);
			$table->addColumn('user_id', 'string', [
				'notnull' => true,
				'length' => 64,
			]);
			$table->addColumn('matrix_user', 'string', [
				'notnull' => true,
				'length' => 200,
			]);
			$table->addColumn('matrix_token', 'string', [
				'notnull' => true,
				'length' => 200,
			]);

			$table->setPrimaryKey(['id']);
			$table->addUniqueConstraint(['user_id'], 'upschooling_mx_user_nc_uniq');
			$table->addUniqueConstraint(['matrix_user'], 'upschooling_mx_user_mx_uniq');
			$table->addForeignKeyConstraint('users', ['user_id'], ['uid'], [], 'upschooling_mx_user_nc_fk');
		}

		if (!$schema->hasTable('upschooling_chats')) {
			$table = $schema->createTable('upschooling_chats');
			$table->addColumn('id', 'integer', [
				'autoincrement' => true,
				'notnull' => true,
			]);
			$table->addColumn('ticket_id', 'integer', [
				'notnull' => true,
			]);
			$table->addColumn('matrix_room_id', 'string', [
				'notnull' => true,
				'length' => 200,
			]);
			$table->addColumn('matrix_helper_user', 'string', [
				'notnull' => true,
				'length' => 200,
			]);
			$table->addColumn('date_start', 'datetimetz', [
				'notnull' => true,
			]);
			$table->addColumn('date_end', 'datetimetz', [
				'notnull' => false,
			]);
			$table->addColumn('version', 'integer', [
				'notnull' => true,
			]);

			$table->setPrimaryKey(['id']);
			$table->addForeignKeyConstraint('upschooling_tickets', ['ticket_id'], ['id'], [], 'upschooling_tckt_id_fk');
		}
		return $schema;
	}
}