<?php

namespace App\Models;

use CodeIgniter\Model;

class AppointmentModel extends Model
{
    protected $table            = 'appointments';
    protected $primaryKey       = 'id';
    protected $useAutoIncrement = true;
    protected $returnType       = 'array';
    protected $useSoftDeletes   = false;
    protected $protectFields    = true;
    protected $allowedFields = [
        'patient_id',
        'doctor_id',
        'appointment_date',
        'appointment_time',
        'status'
    ];

    protected bool $allowEmptyInserts = false;
    protected bool $updateOnlyChanged = true;

    protected array $casts = [];
    protected array $castHandlers = [];

    // Dates
    protected $useTimestamps = false;
    protected $dateFormat    = 'datetime';
    protected $createdField  = 'created_at';
    protected $updatedField  = 'updated_at';
    protected $deletedField  = 'deleted_at';

    // Validation
    protected $validationRules      = [];
    protected $validationMessages   = [];
    protected $skipValidation       = false;
    protected $cleanValidationRules = true;

    // Callbacks
    protected $allowCallbacks = true;
    protected $beforeInsert   = ['setDefaultStatus'];
    protected $afterInsert    = [];

    protected static array $validStatuses = ['pending', 'approved', 'rejected'];

    public static function normalizeStatus(?string $status): string
    {
        $status = trim((string) $status);

        if ($status === '' || ! in_array($status, self::$validStatuses, true)) {
            return 'pending';
        }

        return $status;
    }

    protected function setDefaultStatus(array $eventData): array
    {
        if (! isset($eventData['data']['status']) || trim((string) $eventData['data']['status']) === '') {
            $eventData['data']['status'] = 'pending';
        } else {
            $eventData['data']['status'] = self::normalizeStatus($eventData['data']['status']);
        }

        return $eventData;
    }

    public function countForDate(string $date): int
    {
        return $this->where('appointment_date', $date)->countAllResults();
    }

    public function getRecentActivity(int $limit = 6): array
    {
        return $this->select("appointments.status, appointments.appointment_date, appointments.appointment_time, TRIM(CONCAT(COALESCE(u1.first_name, ''), ' ', COALESCE(u1.last_name, ''))) AS patient_name, TRIM(CONCAT(COALESCE(u2.first_name, ''), ' ', COALESCE(u2.last_name, ''))) AS doctor_name")
            ->join('patients p', 'p.id = appointments.patient_id')
            ->join('users u1', 'u1.id = p.user_id')
            ->join('doctors d', 'd.id = appointments.doctor_id')
            ->join('users u2', 'u2.id = d.user_id')
            ->orderBy('appointments.id', 'DESC')
            ->findAll($limit);
    }

    public function getAdminAppointments(): array
    {
        return $this->asObject()
            ->select("appointments.*, TRIM(CONCAT(COALESCE(u1.first_name, ''), ' ', COALESCE(u1.last_name, ''))) AS patient_name, TRIM(CONCAT(COALESCE(u2.first_name, ''), ' ', COALESCE(u2.last_name, ''))) AS doctor_name")
            ->join('patients p', 'p.id = appointments.patient_id')
            ->join('users u1', 'u1.id = p.user_id')
            ->join('doctors d', 'd.id = appointments.doctor_id')
            ->join('users u2', 'u2.id = d.user_id')
            ->findAll();
    }

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

    public function deleteByPatientId(int $patientId): void
    {
        $this->where('patient_id', $patientId)->delete();
    }

    protected $beforeUpdate   = [];
    protected $afterUpdate    = [];
    protected $beforeFind     = [];
    protected $afterFind      = [];
    protected $beforeDelete   = [];
    protected $afterDelete    = [];
}