<?php

namespace App\Models;

use CodeIgniter\Model;

class PatientModel extends Model
{
    protected $table            = 'patients';
    protected $primaryKey       = 'id';
    protected $useAutoIncrement = true;
    protected $returnType       = 'array';
    protected $useSoftDeletes   = false;
    protected $protectFields    = true;
    protected $allowedFields    = ['user_id','age','gender','phone'];

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

    public function findByUserId(int $userId): ?array
    {
        $row = $this->where('user_id', $userId)->first();

        return $row ?: null;
    }

    public function getAdminPatientList(string $sortBy = 'patient_id', string $sortDir = 'asc'): array
    {
        $fullNameSql = "TRIM(CONCAT(COALESCE(users.first_name, ''), ' ', COALESCE(users.last_name, '')))";

        $sortColumns = [
            'patient_id' => 'users.id',
            'name'       => $fullNameSql,
            'email'      => 'users.email',
            'phone'      => 'patients.phone',
            'status'     => 'users.status',
        ];

        $sortColumn = $sortColumns[$sortBy] ?? 'users.id';
        $sortDir    = strtolower($sortDir) === 'desc' ? 'DESC' : 'ASC';

        return $this->asObject()
            ->select("users.id as user_id, CASE WHEN users.formatted_user_id IS NULL OR users.formatted_user_id = '' OR users.formatted_user_id LIKE 'PHY%' THEN CONCAT('PAT', LPAD(users.id, 7, '0')) ELSE users.formatted_user_id END as formatted_user_id, {$fullNameSql} as name, users.email, users.first_name, users.last_name, users.status, patients.id, patients.phone")
            ->join('users', 'users.id = patients.user_id')
            ->where('users.role', 'patient')
            ->orderBy($sortColumn, $sortDir)
            ->findAll();
    }

    public function getLatestPatients(int $limit = 5): array
    {
        return $this->select("TRIM(CONCAT(COALESCE(users.first_name, ''), ' ', COALESCE(users.last_name, ''))) as name, patients.phone")
            ->join('users', 'users.id = patients.user_id')
            ->orderBy('patients.id', 'DESC')
            ->findAll($limit);
    }
}