<?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
    public function index() {
        try {
            $PatientID = $this->request->getVar('PatientID');
            $AlternatePID = $this->request->getVar('AlternatePID');
            $Prefix = $this->request->getVar('Prefix');
            $name = $this->request->getVar('name');
            $Suffix = $this->request->getVar('Suffix');
            $BirthDate = $this->request->getVar('BirthDate');
            $startDate = $this->request->getVar('startDate');
            $endDate = $this->request->getVar('endDate');

            $builder = $this->db->table('Patient');
            
            if ($name !== null) { 
                $sql    = "LOWER(CONCAT_WS(' ', IFNULL(prefix,''), IFNULL(name_first,''), IFNULL(name_middle,''), IFNULL(name_last,''), IFNULL(name_maiden,''), IFNULL(suffix,'')))";
                $rawSql = new RawSql($sql);
                $builder->like($rawSql, $name, 'both');
            }
            if ($PatientID !== null) { $builder->where('PatientID', $pat_num); }
            if ($AlternatePID !== null) { $builder->where('AlternatePID', $pat_altnum); }
            if ($BirthDate !== null) { $builder->where('BirthDate', $pat_dob); }
            /*
            if ($startDate !== null || $endDate !== null) { 
                $builder->join('requests', 'pat_id=patients.pat_id','left');
                if ($start_date !== null) { $builder->where('requests.req_date >=', $start_date . ' 00:00:00'); }
                if ($end_date !== null) { $builder->where('requests.req_date <=', $end_date . ' 23:59:00'); }
            }
            */

            $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.');
        }
    }

    // OK
    public function show($id = null) {

        try {

            $builder = $this->db->table('Patient');
            $patient = $builder->where('PatientID', $id)->get()->getRowArray();

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

            // 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');
        }

    }

    // OK
    public function create() {

        try {
            $input = $this->request->getJSON(true);

            $data = [
                "PatientID" => $input['PatientID'] ?? null,
                "AlternatePID" => $input['AlternatePID'] ?? null,
                "Prefix" => $input['Prefix'] ?? null, 
                "NameFirst" => $input['NameFirst'] ?? null,
                "NameMiddle" => $input['NameMiddle'] ?? null,
                "NameLast" => $input['NameLast'] ?? null,
                "NameMaiden" => $input['NameMaiden'] ?? null,
                "Suffix" => $input['Suffix'] ?? null,
                "NameAlias" => $input['NameAlias'] ?? null,
                "Gender" => $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,
                "CountryID" => $input['CountryID'] ?? null,
                "ZIP" => $input['ZIP'] ?? null,
                "EmailAddress1" => $input['EmailAddress1'] ?? null,
                "EmailAddress2" => $input['EmailAddress2'] ?? null,
                "Phone" => $input['Phone'] ?? null,
                "Mobilephone" => $input['Mobilephone'] ?? null,
                "Mother" => $input['Mother'] ?? null,
                "Accountnumber" => $input['Accountnumber'] ?? null,
                "RaceID" => $input['RaceID'] ?? null,
                "MaritalStatus" => $input['MaritalStatus'] ?? null,
                "ReligionID" => $input['ReligionID'] ?? null,
                "EthnicID" => $input['EthnicID'] ?? null,
                "Citizenship" => $input['Citizenship'] ?? null,
                "DeathIndicator" => $input['DeathIndicator'] ?? null,
                "DeathDateTime" => $input['DeathDateTime'] ?? null,
                "LinkTo" => $input['LinkTo'] ?? null,
                "create_date" => date('Y-m-d H:i:s')
            ];

            $rules = [
                'PatientID' => 'required|is_unique[patients.pat_num]|max_length[50]',
                'NameFirst' => 'required|min_length[3]|max_length[255]',
                'NameMiddle' => 'permit_empty',
                'NameMaiden' => 'permit_empty',
                'NameLast' => 'permit_empty',
                // 'birth_date' => 'permit_empty|valid_date[Y-m-d]|not_in_list[0000-00-00]',
                'AlternatePID' => 'permit_empty|max_length[50]',
                'Street_1' => 'permit_empty',
                'Street_2' => 'permit_empty',
                'Street_3' => 'permit_empty',
                'City' => 'permit_empty',
            ];

            // Request dari client tidak valid atau tidak bisa diproses oleh server - 400
            if (!$this->validateData($data, $rules)) {
                return $this->respond([
                    'status' => 'error',
                    'message' => 'Validation failed',
                    'errors' => $this->validator->getErrors()
                ], 400);
            }

            $this->db->table('Patient')->insert($data);
            $newPatientId = $this->db->insertID();

            // Sukses & Insert = 201 - Kirim data patient ID
            return $this->respondCreated([
                'status' => 'success',
                'message' => 'Patient created successfully',
                'data'  => $newPatientId
            ], 201);

        } catch (\Exception $e) {

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

    // OK
    public function update($PatientID = null) {

        try {
            $input = $this->request->getJSON(true);

            $data = [
                "AlternatePID" => $input['AlternatePID'] ?? null,
                "Prefix" => $input['Prefix'] ?? null, 
                "NameFirst" => $input['NameFirst'] ?? null,
                "NameMiddle" => $input['NameMiddle'] ?? null,
                "NameLast" => $input['NameLast'] ?? null,
                "NameMaiden" => $input['NameMaiden'] ?? null,
                "Suffix" => $input['Suffix'] ?? null,
                "NameAlias" => $input['NameAlias'] ?? null,
                "Gender" => $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,
                "CountryID" => $input['CountryID'] ?? null,
                "ZIP" => $input['ZIP'] ?? null,
                "EmailAddress1" => $input['EmailAddress1'] ?? null,
                "EmailAddress2" => $input['EmailAddress2'] ?? null,
                "Phone" => $input['Phone'] ?? null,
                "Mobilephone" => $input['Mobilephone'] ?? null,
                "Mother" => $input['Mother'] ?? null,
                "Accountnumber" => $input['Accountnumber'] ?? null,
                "RaceID" => $input['RaceID'] ?? null,
                "MaritalStatus" => $input['MaritalStatus'] ?? null,
                "ReligionID" => $input['ReligionID'] ?? null,
                "EthnicID" => $input['EthnicID'] ?? null,
                "Citizenship" => $input['Citizenship'] ?? null,
                "DeathIndicator" => $input['DeathIndicator'] ?? null,
                "DeathDateTime" => $input['DeathDateTime'] ?? null,
                "LinkTo" => $input['LinkTo'] ?? null,
                "create_date" => date('Y-m-d H:i:s')
            ];

            $rules = [
                'NameFirst' => 'required|min_length[3]|max_length[255]',
                'NameMiddle' => 'permit_empty',
                'NameMaiden' => 'permit_empty',
                'NameLast' => 'permit_empty',
                // 'birth_date' => 'permit_empty|valid_date[Y-m-d]|not_in_list[0000-00-00]',
                'AlternatePID' => 'permit_empty|max_length[50]',
                'Street_1' => 'permit_empty',
                'Street_2' => 'permit_empty',
                'Street_3' => 'permit_empty',
                'City' => 'permit_empty',
            ];
            
            $existingPatient = $this->db->table('Patient')->where('PatientID', $PatientID)->get()->getRowArray();
            
            // Mengembalikan 404
            if (empty($existingPatient)) {
                return $this->failNotFound('Patient with ID ' . $PatientID . ' not found.');
            }

            // Request dari client tidak valid atau tidak bisa diproses oleh server - 400
            if (!$this->validateData($data, $rules)) {
                return $this->failValidationErrors($this->validator->getErrors());
            }

            $allowedUpdateFields = [
                'NameFirst', 'NameLast', 'NameMiddle', 
                'PatientID', 'AlternatePID', 'BirthDate', 'PlaceOfBirth',
                'Street_1', 'Street_2', 'Street_3', 'City', 'Province', 'ZIP',
                'Emailaddress1', 'Emailaddress2', 'Phone', 'Mobilephone', 'Mother', 'AccountNumber'
            ];

            $datas = [];
            foreach ($allowedUpdateFields as $field) {
                if (isset($data[$field])) {
                    $datas[$field] = $data[$field];
                }
            }

            if (empty($data)) {
                return $this->failValidationError('No data provided for update.');
            }

            $this->db->table('Patient')->where('PatientID', $PatientID)->update($data);

            // Sukses & Insert = 201 - Kirim data patient ID
            return $this->respondCreated([
                'status' => 'success',
                'message' => 'Patient updated successfully',
                'data'  => $data
            ], 201);

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

    // OK
    public function delete($PatientID = null) {

        try {
        
            if (!$PatientID) {
                return $this->failValidationError('Patient ID is required.');
            }

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

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

            // Hapus data pasien berdasarkan pat_num
            $this->db->table('Patient')->where('PatientID', $PatientID)->delete();

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

}