<?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 {
            $pat_num = $this->request->getVar('pat_num');
            $pat_altnum = $this->request->getVar('pat_altnum');
            $pat_name = $this->request->getVar('pat_name');
            $pat_dob = $this->request->getVar('pat_dob');
            $start_date = $this->request->getVar('start_date');
            $end_date = $this->request->getVar('end_date');

            $builder = $this->db->table('patients');
            
            if ($pat_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, $pat_name, 'both');
            }
            if ($pat_num !== null) { $builder->where('pat_num', $pat_num); }
            if ($pat_altnum !== null) { $builder->where('pat_altnum', $pat_altnum); }
            if ($pat_dob !== null) { $builder->where('pat_dob', $pat_dob); }
            if ($start_date !== null || $end_date !== 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('patients');
            $patient = $builder->where('pat_num', $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 = [
                // "pat_id" => $input['patientID'] ?? null,
                "pat_num" => $input['alternateID'] ?? null,
                // "pat_altnum" => $input['alternateID'] ?? null,
                // "prefix" => $input['prefix'] ?? null, 

                "name_first" => $input['firstName'] ?? null,
                "name_middle" => $input['middleName'] ?? null,
                "name_last" => $input['lastName'] ?? null,
                "name_maiden" => $input['maidenName'] ?? null,
                "gender" => $input['gender'] ?? null,
                "birth_place" => $input['placeOfBirthdate'] ?? null,
                "birth_date" => $input['birthdate'] ?? null,
                "mother" => $input['motherName'] ?? null,
                "marital_status" => $input['maritalStatus'] ?? null,
                // "religion_id" => $input['religion'] ?? null,
                // "race_id" => $input['race'] ?? null,
                // "ethinc_id" => $input['ethnic'] ?? null,
                
                // "suffix" => $input['suffix'] ?? null,
                // "name_alias" => $input['nameAlias'] ?? null,

                "address_1" => $input['street1'] ?? null,
                "address_2" => $input['street2'] ?? null,
                // "address_3" => $input['street3'] ?? null,
                "city" => $input['city'] ?? null,
                "province" => $input['province'] ?? null,

                // "zip" => $input['zip'] ?? null,
                "email_1" => $input['email1'] ?? null,
                "email_2" => $input['email2'] ?? null,
                "phone" => $input['phone'] ?? null,
                "mobile_phone" => $input['mobile'] ?? null,
                "death" => $input['death'] ?? null,
                "death_date" => $input['deathtime'] ?? null,
                // "account_number" => $input['accountNumber'] ?? null,
                // "country_id" => $input['countryId'] ?? null,
                // "citizenship" => $input['citizenship'] ?? null,

                // "link_to" => $input['linkTo'] ?? null,
                "create_date" => date('Y-m-d H:i:s'),
                // "del_date" => $input['delDate'] ?? null
            ];

            $rules = [
                'pat_num' => 'required|is_unique[patients.pat_num]|max_length[50]',
                'name_first' => 'required|min_length[3]|max_length[255]',
                'name_middle' => 'permit_empty',
                'name_maiden' => 'permit_empty',
                'name_last' => 'permit_empty',
                // 'birth_date' => 'permit_empty|valid_date[Y-m-d]|not_in_list[0000-00-00]',
                'pat_altnum' => 'permit_empty|max_length[50]',
                'address_1' => 'permit_empty',
                'address_2' => 'permit_empty',
                'address_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);
            }

            $this->db->table('patients')->insert($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($pat_id = null) {

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

            $data = [
                'name_first' => $input['name_first'], // Mengambil dari firstName
                'name_last' => $input['name_last'],   // Mengambil dari lastName
                'name_middle' => $input['middleName'] ?? null, // Mengambil dari middleName
                'name_maiden' => $input['maindenName'] ?? null, // Mengambil dari maindenName
                'pat_num' => $input['pat_num'], // Mengambil dari patientID
                'prefix' => $input['title'] ?? null, // Mengambil dari title
                'suffix' => $input['suffixName'] ?? null, // Mengambil dari suffixName
                'birth_date' => $input['birthdate'] ?? null, // Mengambil dari birthdate
                'pat_altnum' => $input['alternateID'] ?? null, // Mengambil dari alternateID
                'address_1' => $input['street1'] ?? null, // Mengambil dari street1
                'address_2' => $input['street2'] ?? null, // Mengambil dari street2
                'address_3' => $input['placeOfBirthdate'] ?? null, // Memetakan placeOfBirthdate ke address_3, jika diperlukan
                'city' => $input['city'] ?? null, // Mengambil dari city
                'province' => $input['province'] ?? null, // Mengambil dari province
                'zip' => null, // Tidak ada padanan langsung di newPatientForm, bisa diisi manual atau dari input lain
                'email_1' => $input['email1'] ?? null, // Mengambil dari email1
                'email_2' => $input['email2'] ?? null, // Mengambil dari email2
                'phone' => $input['phone'] ?? null, // Mengambil dari phone
                'mobile_phone' => $input['mobile'] ?? null, // Mengambil dari mobile
                'mother' => $input['motherName'] ?? null, // Mengambil dari motherName
                'account_number' => null, // Tidak ada padanan langsung, bisa diisi manual atau dari input lain
                'marital_status' => $input['maritalStatus'] ?? null, // Mengambil dari maritalStatus
                'country_id' => null, // Tidak ada padanan langsung, perlu penyesuaian jika ada input negara
                'citizenship' => null, // Tidak ada padanan langsung, perlu penyesuaian jika ada input kewarganegaraan
                'death' => $input['death'] ?? null,   // Mengambil dari death (asumsi 0/1 atau boolean)
                'death_date' => $input['deathTime'] ?? null, // Mengambil dari deathTime
                'create_date' => date('Y-m-d H:i:s'), // Ini adalah tanggal dan waktu saat ini di server PHP
            ];

            // Apakah Pasien Ada
            $existingPatient = $this->db->table('patients')->where('pat_id', $pat_id)->get()->getRowArray();
            
            // Mengembalikan 404
            if (empty($existingPatient)) {
                return $this->failNotFound('Patient with ID ' . $pat_id . ' not found.');
            }

            $rules = [
                'pat_num' => 'required|max_length[50]',
                'name_first' => 'required|min_length[3]|max_length[255]',
                'name_middle' => 'permit_empty',
                'name_maiden' => 'permit_empty',
                'name_last' => 'permit_empty',
                'birth_date' => 'permit_empty|valid_date[Y-m-d]',
                'pat_altnum' => 'permit_empty|max_length[50]',
                'address_1' => 'permit_empty',
                'address_2' => 'permit_empty',
                'address_3' => 'permit_empty',
                'city' => 'permit_empty',
            ];

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

            $allowedUpdateFields = [
                'name_first', 'name_last', 'name_middle', 
                'pat_num', 'pat_altnum', 'birth_date', 'birth_place',
                'address_1', 'address_2', 'address_3', 'city', 'province', 'zip',
                'email_1', 'email_2', 'phone', 'mobile_phone', 'mother', 'account_number'
            ];

            $datas = [];
            foreach ($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('patients')->where('pat_id', $pat_id)->update($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($pat_id = null) {

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

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

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

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

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

}