<?php
namespace App\Controllers;

use CodeIgniter\API\ResponseTrait;
use CodeIgniter\Controller;


use App\Models\CounterModel;
use App\Models\PatVisitModel;

class PatVisit extends Controller {
	use ResponseTrait;

	protected $db;
	protected $visnum_prefix;

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

	public function show($PVID = null) {
		try {
			$model = new PatVisitModel();
			$row = $model->show($PVID);
			return $this->respond([
				'status' => 'success',
				'message'=> "data found",
				'data'   => $row,
			], 200);
		} catch (\Exception $e) {
			return $this->failServerError('Something went wrong '.$e->getMessage());
		}
	}

	public function showByPatient($InternalPID = null) {
		try {
			$model = new PatVisitModel();
			$row = $model->showByPatient($InternalPID);
			return $this->respond([
				'status' => 'success',
				'message'=> "data found",
				'data'   => $row,
			], 200);
		} catch (\Exception $e) {
			return $this->failServerError('Something went wrong '.$e->getMessage());
		}
	}

	public function update() {
		$input = $this->request->getJSON(true);
		try {
			
			if (!$input) { return $this->respond(  ['status' => 'error', 'message' => 'Invalid JSON input'], 400); }
			
			if (!$input["InternalPVID"] || !is_numeric($input["InternalPVID"])) { return $this->respond(['status' => 'error', 'message' => 'Invalid or missing ID'], 400); }
			$InternalPVID = $input["InternalPVID"];
			$dataPatVisit = $this->preparePatVisitData($input);
			$dataPatDiag = $this->preparePatDiagData($input);
			$dataPatVisitAdt = $this->preparePatVisitAdtData($input);

			$this->db->transStart();
			$this->db->table('patvisit')->where('InternalPVID', $InternalPVID)->update($dataPatVisit);
			$this->db->table('patdiag')->where('InternalPVID', $InternalPVID)->update($dataPatDiag);
			$this->db->table('patvisitadt')->where('InternalPVID', $InternalPVID)->update($dataPatVisitAdt);
			
			$dbError = $this->db->error();

			$this->db->transComplete();

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

			return $this->respond([
				'status'  => 'success',
				'message' => 'Data updated successfully',
				'data'    => $dataPatVisit
			], 201);

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

	public function create() {
		try {
			$input = $this->request->getJSON(true);
			if (!$input) { return $this->respond(['status' => 'error', 'message' => 'Invalid JSON input'], 400); }
			
			if($input['PVID'] =='' || !isset($input['PVID'])) {
				$model = new CounterModel();
        $input['PVID'] = $this->visnum_prefix .$model->use(2); 
				//$input['PVID'] = $this->preparePVID();
			}
			
			$dataPatVisit = $this->preparePatVisitData($input);
			$dataPatDiag = $this->preparePatDiagData($input);
			$dataPatVisitAdt = $this->preparePatVisitAdtData($input);

			$this->db->transStart();
			$this->db->table('patvisit')->insert($dataPatVisit);
			$newInternalPVID = $this->db->insertID();
			if(!empty($dataPatDiag)) { 
				$dataPatDiag['InternalPVID'] = $newInternalPVID;
				$this->db->table('patdiag')->insert($dataPatDiag); 
			}
			if(!empty($dataPatVisitAdt)) {
				$dataPatVisitAdt['InternalPVID'] = $newInternalPVID;
				$this->db->table('patvisitadt')->insert($dataPatVisitAdt); 
			}
			
			$dbError = $this->db->error();

			$this->db->transComplete();

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

			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' => 'Data insert success',
				'data'    => $dataPatVisit
			], 201);
		} catch (\Exception $e) {
			$this->db->transRollback();
			return $this->failServerError('Something went wrong: ' . $e->getMessage());
		}
	}

	private function preparePatVisitData(array $input): array {
		$data = [
			"PVID" => $input['PVID'] ?? null,
			"InternalPID" => $input['InternalPID'] ?? null,
			"EpisodeID" => $input['EpisodeID'] ?? null
		];

		if(!empty($input['InternalPVID'])) { $data["InternalPVID"] = $input["InternalPVID"]; }

		return $data;
	}

	private function preparePatDiagData(array $input): array {
		$data = [
			"InternalPVID" => $input['InternalPVID'] ?? null,
			"InternalPID" => $input['InternalPID'] ?? null,
			"DiagCode" => $input['DiagCode'] ?? null,
			"Diagnosis" => $input['Diagnosis'] ?? null
		];

		return $data;
	}

	private function preparePatVisitAdtData(array $input): array {
		$data = [
			"InternalPVID" => $input['InternalPVID'] ?? null,
			"ADTCode" => $input['ADTCode'] ?? null,
			"LocationID" => $input['LocationID'] ?? null,
			"AttDoc" => $input['AttDoc'] ?? null,
			"RefDoc" => $input['RefDoc'] ?? null,
			"AdmDoc" => $input['AdmDoc'] ?? null,
			"CnsDoc" => $input['CnsDoc'] ?? null
		];

		return $data;
	}
}