<?php

namespace App\Database\Migrations;

use CodeIgniter\Database\Migration;

class DropNameFromUsers extends Migration
{
    public function up(): void
    {
        if ($this->db->fieldExists('name', 'users')) {
            $this->forge->dropColumn('users', 'name');
        }
    }

    public function down(): void
    {
        if ($this->db->fieldExists('name', 'users')) {
            return;
        }

        $this->forge->addColumn('users', [
            'name' => [
                'type'       => 'VARCHAR',
                'constraint' => 100,
                'null'       => true,
                'after'      => 'id',
            ],
        ]);

        if ($this->db->fieldExists('first_name', 'users') && $this->db->fieldExists('last_name', 'users')) {
            $this->db->query("
                UPDATE users
                SET name = TRIM(CONCAT(COALESCE(first_name, ''), ' ', COALESCE(last_name, '')))
                WHERE name IS NULL
            ");
        }
    }
}