<?php
namespace App\Controllers;

use CodeIgniter\API\ResponseTrait;
use CodeIgniter\Controller;
use CodeIgniter\Database\RawSql;

class Patient extends Controller {
    use ResponseTrait;

    public function __construct() {
        $this->db = \Config\Database::connect();
    }

    // OK - Done
    public function index() {
        try {
            $InternalPID = $this->request->getVar('InternalPID');
            $PatientID = $this->request->getVar('PatientID');
            $Name = $this->request->getVar('Name');
            $Birthdate = $this->request->getVar('Birthdate');
            $qname = "LOWER(CONCAT_WS(' ', IFNULL(Prefix,''), IFNULL(NameFirst,''), IFNULL(NameMiddle,''), IFNULL(NameLast,''), IFNULL(NameMaiden,''), IFNULL(Suffix,'')))";
            $builder = $this->db->table('patient');
            $builder->select("InternalPID, PatientID, $qname as FullName, Gender, Birthdate, EmailAddress1 as Email, MobilePhone");
            if ($Name !== null) { 
                $sql    = $qname;
                $rawSql = new RawSql($sql);
                $builder->like($rawSql, $Name, 'both');
            }
            if ($InternalPID !== null) { $builder->where('InternalPID', $InternalPID); }
            if ($PatientID !== null) { $builder->like('PatientID', $PatientID, 'both'); }
            if ($Birthdate !== null) { $builder->where('Birthdate', $Birthdate); }

            $filteredPatients = $builder->get()->getResultArray();

            // Data pasien tidak ada mengembalikan - success 200
            if (empty($filteredPatients)) {
                return $this->respond([
                    'status' => 'success',
                    'message' => 'No patient records found matching the criteria.',
                    'data' => []
                ], 200);
            }

            // Data pasien ditemukan dan mengembalikan - success 200 
            return $this->respond([
                        'status' => 'success',
                        'message'=> "Patients fetched successfully",
                        'data'   => $filteredPatients,
                    ], 200);

        } catch (\Exception $e) {
            
            // Error Server Mengembalikan 500
            return $this->failServerError('Something went wrong.'.$e->getMessage());
        }
    }

    // OK - Done
    public function show($InternalPID = null) {

        try {

            $patient = $this->db->table('patient')
                        ->select('patient.*, country.Country as CountryName, race.Race as RaceName, religion.Religion as ReligionName, ethnic.Ethnic as EthnicName')
                        ->join('country', 'country.IntCountryID = patient.IntCountryID', 'left')
                        ->join('race', 'race.RaceID = patient.RaceID', 'left')
                        ->join('religion', 'religion.ReligionID = patient.ReligionID', 'left')
                        ->join('ethnic', 'ethnic.EthnicID = patient.EthnicID', 'left')
                        ->where('InternalPID', (int) $InternalPID)
                        ->get()
                        ->getRowArray();

            // Data pasien tidak ada mengembalikan - success 200
            if (empty($patient)) {
                return $this->respond([
                    'status' => 'success',
                    'message' => 'Patient with ID ' . $InternalPID . ' not found.',
                    'data' => [],
                ], 200);
            
            } else {

                $patient["Age"] = $this->calculateAgeFromBirthdate($patient["Birthdate"]);
                $patient["Birthdate"] = $this->formatedDate($patient["Birthdate"]);
                $patient["CreateDate"] = $this->formatedDate($patient["CreateDate"]);
                $patient["DelDate"] = $this->formatedDate($patient["DelDate"]);
                $patient["DeathDateTime"] = $this->formatedDate($patient["DeathDateTime"]);
                $patient["BirthdateConversion"] = $this->formatedDateForDisplay($patient["Birthdate"]);

                if ($patient['LinkTo'] != null) {
                    
                    $ids = explode(',', $patient['LinkTo']); // dari string jadi array
                    $patientLinkTo = $this->db->table('patient')
                            ->select('InternalPID, PatientID')
                            ->whereIn('InternalPID', $ids)
                            ->get()
                            ->getResultArray();
                    $patient["LinkTo"] = $patientLinkTo == [] ? null : $patientLinkTo;
                }

                if ($patient['Custodian'] != null) {
                    
                    $patientCustodian = $this->db->table('patient')
                            ->select('InternalPID, PatientID')
                            ->where('InternalPID', (int) $InternalPID)
                            ->get()
                            ->getResultArray();
                    $patient["Custodian"] = $patientCustodian == [] ? null : $patientCustodian[0];
                }

                $patidt = $this->db->table('patidt')
                            ->select('IdentifierType, Identifier')
                            ->where('InternalPID', (int) $InternalPID)
                            ->get()
                            ->getResultArray();
                $patient['Identity'] = $patidt == [] ? null : $patidt[0];
            }

            // Data pasien ditemukan dan mengembalikan - success 200 
            return $this->respond([
                        'status' => 'success',
                        'message'=> "Patient Show Successfully",
                        'data'   => $patient,
                    ], 200);

        } catch (\Exception $e) {

            // Error Server Mengembalikan 500
            return $this->failServerError('Something went wrong'.$e->getMessage());
        }

    }

    // OK - Done
    public function create() {
        try {
            $input = $this->request->getJSON(true);

            $LinkTo = null;
            if (!empty($input['LinkTo'])) {
                $ids = []; // Temporary
                foreach ($input['LinkTo'] as $row) {
                    $ids[] = $row['InternalPID'];
                }
                $LinkTo = implode(',', $ids);
            }

            // =========================
            // 1. Data untuk tabel patient
            // =========================
            // $dataPatient = [
            //     "PatientID"        => $input['PatientID'] ?? null,
            //     "AlternatePID"     => $input['AlternatePID'] ?? null,
            //     "Prefix"           => $input['Prefix'] ?? null,
            //     "NameFirst"        => $input['NameFirst'] ?? null,
            //     "NameMiddle"       => $input['NameMiddle'] ?? null,
            //     "NameMaiden"       => $input['NameMaiden'] ?? null,
            //     "NameLast"         => $input['NameLast'] ?? null,
            //     "Suffix"           => $input['Suffix'] ?? null,
            //     "NameAlias"        => $input['NameAlias'] ?? null,
            //     "Gender"           => isset($input['Gender']) ? (int) $input['Gender'] : null,
            //     "PlaceOfBirth"     => $input['PlaceOfBirth'] ?? null,
            //     "Birthdate"        => $input['Birthdate'] ?: null,
            //     "Street_1"         => $input['Street_1'] ?? null,
            //     "Street_2"         => $input['Street_2'] ?? null,
            //     "Street_3"         => $input['Street_3'] ?? null,
            //     "City"             => $input['City'] ?? null,
            //     "Province"         => $input['Province'] ?? null,
            //     "ZIP"              => $input['ZIP'] ?? null,
            //     "EmailAddress1"    => $input['EmailAddress1'] ?? null,
            //     "EmailAddress2"    => $input['EmailAddress2'] ?? null,
            //     "Phone"            => $input['Phone'] ?? null,
            //     "MobilePhone"      => $input['MobilePhone'] ?? null,
            //     "RaceID"           => isset($input['RaceID']) ? (int) $input['RaceID'] : null,
            //     "IntCountryID"     => isset($input['IntCountryID']) ? (int) $input['IntCountryID'] : null,
            //     "MaritalStatus"    => $input['MaritalStatus'] ?? null,
            //     "ReligionID"       => isset($input['ReligionID']) ? (int) $input['ReligionID'] : null,
            //     "EthnicID"         => isset($input['EthnicID']) ? (int) $input['EthnicID'] : null,
            //     "Citizenship"      => $input['Citizenship'] ?? null,
            //     "DeathIndicator"   => isset($input['DeathIndicator']) ? (int) $input['DeathIndicator'] : null,
            //     'DeathDateTime'    => $input['DeathDateTime'] ?: null,
            //     "CreateDate"       => date('Y-m-d H:i:s'),
            //     "DelDate"          => null,
            //     "LinkTo"           => $LinkTo
            // ];
            $dataPatient = [
                "PatientID"      => ($input['PatientID'] ?? '')        !== '' ? $input['PatientID'] : null,
                "AlternatePID"   => ($input['AlternatePID'] ?? '')     !== '' ? $input['AlternatePID'] : null,
                "Prefix"         => ($input['Prefix'] ?? '')           !== '' ? $input['Prefix'] : null,
                "NameFirst"      => ($input['NameFirst'] ?? '')        !== '' ? $input['NameFirst'] : null,
                "NameMiddle"     => ($input['NameMiddle'] ?? '')       !== '' ? $input['NameMiddle'] : null,
                "NameMaiden"     => ($input['NameMaiden'] ?? '')       !== '' ? $input['NameMaiden'] : null,
                "NameLast"       => ($input['NameLast'] ?? '')         !== '' ? $input['NameLast'] : null,
                "Suffix"         => ($input['Suffix'] ?? '')           !== '' ? $input['Suffix'] : null,
                "NameAlias"      => ($input['NameAlias'] ?? '')        !== '' ? $input['NameAlias'] : null,
                "Gender"         => ($input['Gender'] ?? '')           !== '' ? (int)$input['Gender'] : null,
                "PlaceOfBirth"   => ($input['PlaceOfBirth'] ?? '')     !== '' ? $input['PlaceOfBirth'] : null,
                "Birthdate"      => ($input['Birthdate'] ?? '')        !== '' ? $input['Birthdate'] : null,
                "Street_1"       => ($input['Street_1'] ?? '')         !== '' ? $input['Street_1'] : null,
                "Street_2"       => ($input['Street_2'] ?? '')         !== '' ? $input['Street_2'] : null,
                "Street_3"       => ($input['Street_3'] ?? '')         !== '' ? $input['Street_3'] : null,
                "City"           => ($input['City'] ?? '')             !== '' ? $input['City'] : null,
                "Province"       => ($input['Province'] ?? '')         !== '' ? $input['Province'] : null,
                "ZIP"            => ($input['ZIP'] ?? '')              !== '' ? $input['ZIP'] : null,
                "EmailAddress1"  => ($input['EmailAddress1'] ?? '')    !== '' ? $input['EmailAddress1'] : null,
                "EmailAddress2"  => ($input['EmailAddress2'] ?? '')    !== '' ? $input['EmailAddress2'] : null,
                "Phone"          => ($input['Phone'] ?? '')            !== '' ? $input['Phone'] : null,
                "MobilePhone"    => ($input['MobilePhone'] ?? '')      !== '' ? $input['MobilePhone'] : null,
                "RaceID"         => ($input['RaceID'] ?? '')           !== '' ? (int)$input['RaceID'] : null,
                "IntCountryID"   => ($input['IntCountryID'] ?? '')     !== '' ? (int)$input['IntCountryID'] : null,
                "MaritalStatus"  => ($input['MaritalStatus'] ?? '')    !== '' ? $input['MaritalStatus'] : null,
                "ReligionID"     => ($input['ReligionID'] ?? '')       !== '' ? (int)$input['ReligionID'] : null,
                "EthnicID"       => ($input['EthnicID'] ?? '')         !== '' ? (int)$input['EthnicID'] : null,
                "Citizenship"    => ($input['Citizenship'] ?? '')      !== '' ? $input['Citizenship'] : null,
                "DeathIndicator" => ($input['DeathIndicator'] ?? '')   !== '' ? (int)$input['DeathIndicator'] : null,
                "DeathDateTime"  => ($input['DeathDateTime'] ?? '')    !== '' ? $input['DeathDateTime'] : null,
                "Custodian"      => ($input['Custodian'] ?? '')        !== '' ? (int)$input['Custodian'] : null,
                "CreateDate"     => date('Y-m-d H:i:s'),
                "DelDate"        => null,
                "LinkTo"         => $LinkTo
            ];

            $rulesDataPatient = [
                'PatientID'      => 'required|is_unique[patient.PatientID]|max_length[50]',
                'AlternatePID'   => 'permit_empty|max_length[50]',
                'NameFirst'      => 'required|min_length[1]|max_length[255]',
                'EmailAddress1'  => 'required|is_unique[patient.EmailAddress1]',
                'DeathIndicator' => 'required',
                'Gender'         => 'required'
            ];

            $dataPatidt = [
                "IdentifierType" => $input['Identity']['IdentifierType'] === '' ? null : ($input['Identity']['IdentifierType'] ?? null),
                "Identifier"     => $input['Identity']['Identifier'] === '' ? null : ($input['Identity']['Identifier'] ?? null),
                "CreateDate"     => date('Y-m-d H:i:s'),
            ];
            $rulesDataPatidt = [
                'Identifier' => 'required|is_unique[patidt.Identifier]',
            ];

            // =========================
            // Validasi semua sebelum insert
            // =========================
            if (!$this->validateData($dataPatient, $rulesDataPatient)) {
                return $this->respond([
                    'status'  => 'error',
                    'message' => 'Validation failed (patient)',
                    'errors'  => $this->validator->getErrors()
                ], 400);
            }

            if (!$this->validateData($dataPatidt, $rulesDataPatidt)) {
                return $this->respond([
                    'status'  => 'error',
                    'message' => 'Validation failed (patidt)',
                    'errors'  => $this->validator->getErrors()
                ], 400);
            }

            // =========================
            // Mulai transaksi
            // =========================
            $this->db->transStart();

            $this->db->table('patient')->insert($dataPatient);
            $newInternalPatientId = $this->db->insertID();

            $dbError = $this->db->error();
            if (!empty($dbError['message'])) {
                $this->db->transRollback();
                return $this->failServerError('Insert patient failed: ' . $dbError['message']);
            }

            $dataPatidt['InternalPID'] = $newInternalPatientId;
            $this->db->table('patidt')->insert($dataPatidt);

            $this->db->transComplete();

            if ($this->db->transStatus() === false) {
                $dbError = $this->db->error(); 
                return $this->failServerError(
                    'Failed to create patient data (transaction rolled back): ' . ($dbError['message'] ?? 'Unknown database error')
                );
            }

            return $this->respondCreated([
                'status'  => 'success',
                'message' => 'Patient created successfully',
                'data'    => $newInternalPatientId
            ], 201);

        } catch (\Exception $e) {
            $this->db->transRollback();
            return $this->failServerError('Something went wrong: ' . $e->getMessage());
        }
    }

    // OK - Done
    public function update($InternalPID = null) {
        try {
            if (!$InternalPID || !is_numeric($InternalPID)) {
                return $this->respond(['status' => 'error', 'message' => 'Invalid or missing InternalPID'], 400);
            }

            $input = $this->request->getJSON(true);
            if (!$input) {
                return $this->respond(['status' => 'error', 'message' => 'Invalid JSON input'], 400);
            }

            // Cek apakah data patient ada
            $patient = $this->db->table('patient')->where('InternalPID', $InternalPID)->get()->getRowArray();
            if (!$patient) {
                return $this->respond(['status' => 'error', 'message' => 'Patient not found'], 404);
            }

            $LinkTo = null;
            if (!empty($input['LinkTo']) && is_array($input['LinkTo'])) {
                $ids = [];
                foreach ($input['LinkTo'] as $row) {
                    if (isset($row['InternalPID']) && is_numeric($row['InternalPID'])) {
                        $ids[] = (int)$row['InternalPID'];
                    }
                }
                $LinkTo = implode(',', $ids);
            }

            // Data untuk update patient
            // $dataPatient = [
            //     "PatientID"      => $input['PatientID'] ?? $patient['PatientID'],
            //     "AlternatePID"   => $input['AlternatePID'] ?? $patient['AlternatePID'],
            //     "Prefix"         => $input['Prefix'] ?? $patient['Prefix'],
            //     "NameFirst"      => $input['NameFirst'] ?? $patient['NameFirst'],
            //     "NameMiddle"     => $input['NameMiddle'] ?? $patient['NameMiddle'],
            //     "NameMaiden"     => $input['NameMaiden'] ?? $patient['NameMaiden'],
            //     "NameLast"       => $input['NameLast'] ?? $patient['NameLast'],
            //     "Suffix"         => $input['Suffix'] ?? $patient['Suffix'],
            //     "NameAlias"      => $input['NameAlias'] ?? $patient['NameAlias'],
            //     "Gender"         => isset($input['Gender']) && is_numeric($input['Gender']) ? (int)$input['Gender'] : $patient['Gender'],
            //     "PlaceOfBirth"   => $input['PlaceOfBirth'] ?? $patient['PlaceOfBirth'],
            //     "Birthdate"      => $input['Birthdate'] ?: $patient['Birthdate'],
            //     "Street_1"       => $input['Street_1'] ?? $patient['Street_1'],
            //     "Street_2"       => $input['Street_2'] ?? $patient['Street_2'],
            //     "Street_3"       => $input['Street_3'] ?? $patient['Street_3'],
            //     "City"           => $input['City'] ?? $patient['City'],
            //     "Province"       => $input['Province'] ?? $patient['Province'],
            //     "ZIP"            => $input['ZIP'] ?? $patient['ZIP'],
            //     "EmailAddress1"  => $input['EmailAddress1'] ?? $patient['EmailAddress1'],
            //     "EmailAddress2"  => $input['EmailAddress2'] ?? $patient['EmailAddress2'],
            //     "Phone"          => $input['Phone'] ?? $patient['Phone'],
            //     "MobilePhone"    => $input['MobilePhone'] ?? $patient['MobilePhone'],
            //     "RaceID"         => isset($input['RaceID']) && is_numeric($input['RaceID']) ? (int)$input['RaceID'] : $patient['RaceID'],
            //     "IntCountryID"   => isset($input['IntCountryID']) && is_numeric($input['IntCountryID']) ? (int)$input['IntCountryID'] : $patient['IntCountryID'],
            //     "MaritalStatus"  => $input['MaritalStatus'] ?? $patient['MaritalStatus'],
            //     "ReligionID"     => isset($input['ReligionID']) && is_numeric($input['ReligionID']) ? (int)$input['ReligionID'] : $patient['ReligionID'],
            //     "EthnicID"       => isset($input['EthnicID']) && is_numeric($input['EthnicID']) ? (int)$input['EthnicID'] : $patient['EthnicID'],
            //     "Citizenship"    => $input['Citizenship'] ?? $patient['Citizenship'],
            //     "DeathIndicator" => isset($input['DeathIndicator']) && is_numeric($input['DeathIndicator']) ? (int)$input['DeathIndicator'] : $patient['DeathIndicator'],
            //     'DeathDateTime'  => $input['DeathDateTime'] ?: $patient['DeathDateTime'],
            //     "LinkTo"         => $LinkTo,
            // ];
            $dataPatient = [
                "PatientID"      => ($input['PatientID'] ?? null) === '' ? null : ($input['PatientID'] ?? null),
                "AlternatePID"   => ($input['AlternatePID'] ?? null) === '' ? null : ($input['AlternatePID'] ?? null),
                "Prefix"         => ($input['Prefix'] ?? null) === '' ? null : ($input['Prefix'] ?? null),
                "NameFirst"      => ($input['NameFirst'] ?? null) === '' ? null : ($input['NameFirst'] ?? null),
                "NameMiddle"     => ($input['NameMiddle'] ?? null) === '' ? null : ($input['NameMiddle'] ?? null),
                "NameMaiden"     => ($input['NameMaiden'] ?? null) === '' ? null : ($input['NameMaiden'] ?? null),
                "NameLast"       => ($input['NameLast'] ?? null) === '' ? null : ($input['NameLast'] ?? null),
                "Suffix"         => ($input['Suffix'] ?? null) === '' ? null : ($input['Suffix'] ?? null),
                "NameAlias"      => ($input['NameAlias'] ?? null) === '' ? null : ($input['NameAlias'] ?? null),
                "Gender"         => ($input['Gender'] ?? null) === '' ? null : (isset($input['Gender']) ? (int)$input['Gender'] : null),
                "PlaceOfBirth"   => ($input['PlaceOfBirth'] ?? null) === '' ? null : ($input['PlaceOfBirth'] ?? null),
                "Birthdate"      => ($input['Birthdate'] ?? null) === '' ? null : ($input['Birthdate'] ?? null),
                "Street_1"       => ($input['Street_1'] ?? null) === '' ? null : ($input['Street_1'] ?? null),
                "Street_2"       => ($input['Street_2'] ?? null) === '' ? null : ($input['Street_2'] ?? null),
                "Street_3"       => ($input['Street_3'] ?? null) === '' ? null : ($input['Street_3'] ?? null),
                "City"           => ($input['City'] ?? null) === '' ? null : ($input['City'] ?? null),
                "Province"       => ($input['Province'] ?? null) === '' ? null : ($input['Province'] ?? null),
                "ZIP"            => ($input['ZIP'] ?? null) === '' ? null : ($input['ZIP'] ?? null),
                "EmailAddress1"  => ($input['EmailAddress1'] ?? null) === '' ? null : ($input['EmailAddress1'] ?? null),
                "EmailAddress2"  => ($input['EmailAddress2'] ?? null) === '' ? null : ($input['EmailAddress2'] ?? null),
                "Phone"          => ($input['Phone'] ?? null) === '' ? null : ($input['Phone'] ?? null),
                "MobilePhone"    => ($input['MobilePhone'] ?? null) === '' ? null : ($input['MobilePhone'] ?? null),
                "RaceID"         => ($input['RaceID'] ?? null) === '' ? null : (isset($input['RaceID']) ? (int)$input['RaceID'] : null),
                "IntCountryID"   => ($input['IntCountryID'] ?? null) === '' ? null : (isset($input['IntCountryID']) ? (int)$input['IntCountryID'] : null),
                "MaritalStatus"  => ($input['MaritalStatus'] ?? null) === '' ? null : ($input['MaritalStatus'] ?? null),
                "ReligionID"     => ($input['ReligionID'] ?? null) === '' ? null : (isset($input['ReligionID']) ? (int)$input['ReligionID'] : null),
                "EthnicID"       => ($input['EthnicID'] ?? null) === '' ? null : (isset($input['EthnicID']) ? (int)$input['EthnicID'] : null),
                "Citizenship"    => ($input['Citizenship'] ?? null) === '' ? null : ($input['Citizenship'] ?? null),
                "DeathIndicator" => ($input['DeathIndicator'] ?? null) === '' ? null : (isset($input['DeathIndicator']) ? (int)$input['DeathIndicator'] : null),
                "DeathDateTime"  => ($input['DeathDateTime'] ?? null) === '' ? null : ($input['DeathDateTime'] ?? null),
                // "Custodian"      => ($input['Custodian'] ?? null) === '' ? null : ($input['Custodian'] ?? null),
                "Custodian"      => ($input['Custodian'] ?? null) === '' ? null : (isset($input['Custodian']) ? (int)$input['Custodian'] : null),
                "LinkTo"         => $LinkTo,
            ];

            // Atur aturan validasi dengan pengecualian is_unique untuk InternalPID ini
            $rulesDataPatient = [
                'PatientID'      => "required|max_length[50]|is_unique[patient.PatientID,InternalPID,{$InternalPID}]",
                'AlternatePID'   => 'permit_empty|max_length[50]',
                'NameFirst'      => 'required|min_length[1]|max_length[255]',
                'EmailAddress1'  => "required|is_unique[patient.EmailAddress1,InternalPID,{$InternalPID}]",
                'DeathIndicator' => 'required',
                'Gender'         => 'required'
            ];

            // Ambil data patidt
            $patidt = $this->db->table('patidt')->where('InternalPID', $InternalPID)->get()->getRowArray();
            $dataPatidt = [
                "IdentifierType" => $input['Identity']['IdentifierType'] === '' ? null : ($input['Identity']['IdentifierType'] ?? null),
                "Identifier"     => $input['Identity']['Identifier'] === '' ? null : ($input['Identity']['Identifier'] ?? null),
            ];

            $rulesDataPatidt = [
                'Identifier' => "required|is_unique[patidt.Identifier,InternalPID,{$InternalPID}]"
            ];

            // Validasi
            if (!$this->validateData($dataPatient, $rulesDataPatient)) {
                return $this->respond([
                    'status'  => 'error',
                    'message' => 'Validation failed (patient)',
                    'errors'  => $this->validator->getErrors()
                ], 400);
            }

            if (!$this->validateData($dataPatidt, $rulesDataPatidt)) {
                return $this->respond([
                    'status'  => 'error',
                    'message' => 'Validation failed (patidt)',
                    'errors'  => $this->validator->getErrors()
                ], 400);
            }

            // Transaksi update
            $this->db->transStart();

            $this->db->table('patient')->where('InternalPID', $InternalPID)->update($dataPatient);
            $dbError = $this->db->error();
            if (!empty($dbError['message'])) {
                $this->db->transRollback();
                return $this->failServerError('Update patient failed: ' . $dbError['message']);
            }

            $this->db->table('patidt')->where('InternalPID', $InternalPID)->update($dataPatidt);
            $dbError = $this->db->error();
            if (!empty($dbError['message'])) {
                $this->db->transRollback();
                return $this->failServerError('Update patidt failed: ' . $dbError['message']);
            }

            $this->db->transComplete();

            if ($this->db->transStatus() === false) {
                $dbError = $this->db->error();
                return $this->failServerError('Failed to update patient data (transaction rolled back): ' . ($dbError['message'] ?? 'Unknown error'));
            }

            return $this->respond([
                'status'  => 'success',
                'message' => 'Patient updated successfully',
                'data'    => $InternalPID
            ], 200);

        } catch (\Exception $e) {
            $this->db->transRollback();
            return $this->failServerError('Something went wrong: ' . $e->getMessage());
        }
    }

    // OK - Done
    public function delete($InternalPID = null) {

        try {

            $InternalPID = (int) $InternalPID;
        
            if (!$InternalPID) {
                return $this->failValidationError('Patient ID is required.');
            }

            // Cari data pasien
            $patient = $this->db->table('patient')->where('InternalPID', $InternalPID)->get()->getRow();

            if (!$patient) {
                return $this->failNotFound("Patient ID with {$InternalPID} not found.");
            }

            // Update kolom DelDate sebagai soft delete
            $this->db->table('patient')->where('InternalPID', $InternalPID)->update(['DelDate' => date('Y-m-d H:i:s')]);

            // Mengembalikan 200
            return $this->respondDeleted([
                'status' => 'success',
                'message' => "Patient ID with {$InternalPID} deleted successfully."
            ]);
 
        } catch (\Exception $e) {
            return $this->failServerError("Internal server error: " . $e->getMessage());
        }
    }

    // OK - Done
    public function patientCheck() {

        try {

            $PatientID = $this->request->getVar('PatientID');
            $EmailAddress1 = $this->request->getVar('EmailAddress1');

            if ($PatientID!=null){
                $tableName = 'PatientID';
                $searchName = $PatientID;
            }

            if ($EmailAddress1!=null){
                $tableName = 'EmailAddress1';
                $searchName = $EmailAddress1;
            }

            $patient = $this->db->table('patient')
                ->where($tableName, $searchName)
                ->get()
                ->getRowArray();

            if (!$patient) {
                return $this->respond([
                    'status'  => 'success',
                    'message' => "$tableName not found.",
                    'data'    => true,
                ], 200);
            }

            return $this->respond([
                'status'  => 'success',
                'message' => "$tableName already exists.",
                'data'    => false,
            ], 200);


        } catch (\Exception $e) {
            // Error Server Mengembalikan 500
            return $this->failServerError('Something went wrong.'.$e->getMessage());
        }
    }


    // Ubah ke format Years Months Days
    private function calculateAgeFromBirthdate($birthdate) {
        $dob = new \DateTime($birthdate);
        $today = new \DateTime();
        $diff = $today->diff($dob);

        $formattedAge = "";
        if ($diff->y > 0){
            $formattedAge .= "{$diff->y} Years ";
        }
        if ($diff->m > 0){
            $formattedAge .= "{$diff->m} Months ";
        }
        if ($diff->d > 0){
            $formattedAge .= "{$diff->d} Days";
        }

        return $formattedAge;
    }

    // Ubah ke format Y-m-d H:i
    private function formatedDate($dateString) {
        $date = \DateTime::createFromFormat('Y-m-d H:i', $dateString);

        if (!$date) {
            $timestamp = strtotime($dateString);
            if ($timestamp) {
                return date('Y-m-d H:i', $timestamp);
            }
            return null;
        }

        return $date->format('Y-m-d H:i');
    }

    // Ubah ke format j M Y
    private function formatedDateForDisplay($dateString) {    
        $date = \DateTime::createFromFormat('Y-m-d H:i', $dateString);

        if (!$date) {
            $timestamp = strtotime($dateString);
            if ($timestamp) {
                return date('j M Y', $timestamp);
            }
            return null;
        }

        return $date->format('j M Y');
    }

}