<?php

namespace App\Database\Migrations;

use CodeIgniter\Database\Migration;

class AddSchoolYearToAssessmentForms extends Migration
{
    public function up(): void
    {
        if (! $this->db->tableExists('assessment_forms')) return;

        if (! $this->db->fieldExists('school_year', 'assessment_forms')) {
            $this->forge->addColumn('assessment_forms', [
                'school_year' => [
                    'type' => 'VARCHAR',
                    'constraint' => 9,
                    'null' => true,
                    'after' => 'pool_id',
                ],
            ]);
        }

        $schoolYear = $this->activeSchoolYear();
        if ($schoolYear !== null) {
            $this->db->table('assessment_forms')
                ->groupStart()->where('school_year', null)->orWhere('school_year', '')->groupEnd()
                ->update(['school_year' => $schoolYear]);
        }
    }

    public function down(): void
    {
        if ($this->db->tableExists('assessment_forms') && $this->db->fieldExists('school_year', 'assessment_forms')) {
            $this->forge->dropColumn('assessment_forms', 'school_year');
        }
    }

    private function activeSchoolYear(): ?string
    {
        if ($this->db->tableExists('school_years')) {
            $row = $this->db->table('school_years')->select('name')->where('status', 'active')->orderBy('id', 'DESC')->get()->getRowArray();
            $name = trim((string) ($row['name'] ?? ''));
            if (preg_match('/^\d{4}-\d{4}$/', $name)) return $name;
        }
        if ($this->db->tableExists('configuration')) {
            $row = $this->db->table('configuration')->select('config_value')->where('config_key', 'school_year')->orderBy('id', 'DESC')->get()->getRowArray();
            $name = trim((string) ($row['config_value'] ?? ''));
            if (preg_match('/^\d{4}-\d{4}$/', $name)) return $name;
        }
        return null;
    }
}