<?php

declare(strict_types=1);

use Phinx\Migration\AbstractMigration;

final class CreateTrainingTopicCoverage extends AbstractMigration
{
    public function change(): void
    {
        $table = $this->table('training_topic_coverage', [
            'id'          => 'id',
            'signed'      => false,
            'engine'      => 'InnoDB',
            'encoding'    => 'utf8mb4',
            'collation'   => 'utf8mb4_unicode_ci',
        ]);

        $table
            ->addColumn('topic_id', 'integer', [
                'signed'  => false,
                'null'    => false,
                'comment' => 'Corso madre (es. RSPP)',
            ])
            ->addColumn('covered_topic_id', 'integer', [
                'signed'  => false,
                'null'    => false,
                'comment' => 'Corso assorbito (es. Antincendio)',
            ])
            ->addColumn('inherit_expiry', 'enum', [
                'values'  => ['own', 'source', 'none'],
                'default' => 'own',
                'null'    => false,
                'comment' => 'own = ricalcola con frequenza propria del corso coperto',
            ])
            ->addColumn('notes', 'string', [
                'limit' => 255,
                'null'  => true,
            ])
            ->addColumn('created_at', 'timestamp', [
                'default' => 'CURRENT_TIMESTAMP',
                'null'    => true,
            ])
            ->addIndex(['topic_id', 'covered_topic_id'], [
                'unique' => true,
                'name'   => 'uq_topic_coverage',
            ])
            ->addIndex(['covered_topic_id'], ['name' => 'idx_covered_topic'])
            ->addForeignKey('topic_id', 'training_topics', 'id', [
                'delete' => 'CASCADE',
                'update' => 'CASCADE',
                'constraint' => 'fk_cov_topic',
            ])
            ->addForeignKey('covered_topic_id', 'training_topics', 'id', [
                'delete' => 'CASCADE',
                'update' => 'CASCADE',
                'constraint' => 'fk_cov_covered',
            ])
            ->create();
    }
}