<?php

namespace App\Models;

use CodeIgniter\Model;

class DoctorSpecializationModel extends Model
{
    protected $table            = 'doctor_specializations';
    protected $primaryKey       = 'id';
    protected $useAutoIncrement = true;
    protected $returnType       = 'array';
    protected $protectFields    = true;
    protected $allowedFields    = [
        'doctor_id',
        'specialization_id',
        'status',
        'created_by',
        'updated_by',
    ];
    protected $useTimestamps    = true;
    protected $dateFormat       = 'datetime';
    protected $createdField     = 'created_at';
    protected $updatedField     = 'updated_at';

    public function getNamesForDoctor(int $doctorId): array
    {
        $rows = $this->select('specializations.name')
            ->join('specializations', 'specializations.id = doctor_specializations.specialization_id')
            ->where('doctor_specializations.doctor_id', $doctorId)
            ->findAll();

        return array_values(array_filter(array_map(
            static fn (array $row) => ! empty($row['name']) ? $row['name'] : null,
            $rows
        )));
    }

    public function deleteByDoctorId(int $doctorId): void
    {
        $this->where('doctor_id', $doctorId)->delete();
    }

    public function syncDoctorSpecializations(int $doctorId, array $specializationIds, ?int $actorId = null): void
    {
        $specializationIds = array_values(array_unique(array_map('intval', $specializationIds)));
        $existingRows       = $this->where('doctor_id', $doctorId)->findAll();
        $existingBySpecId   = [];

        foreach ($existingRows as $row) {
            $existingBySpecId[(int) $row['specialization_id']] = $row;
        }

        $existingIds = array_keys($existingBySpecId);
        $toDelete    = array_diff($existingIds, $specializationIds);
        $toInsert    = array_diff($specializationIds, $existingIds);

        if ($toDelete !== []) {
            $this->where('doctor_id', $doctorId)
                ->whereIn('specialization_id', $toDelete)
                ->delete();
        }

        foreach ($toInsert as $specializationId) {
            $this->insert([
                'doctor_id'         => $doctorId,
                'specialization_id' => $specializationId,
                'status'            => 1,
                'created_by'        => $actorId,
                'updated_by'        => $actorId,
            ]);
        }
    }
}