<?php

class RailApi {
    private $apiKey;
    private $baseUrl = 'https://indianrailapi.com/api/v2/';

    public function __construct() {
        // IMPORTANT: The API key is a placeholder. Replace it with your actual key.
        $this->apiKey = getenv('RAIL_API_KEY') ?: 'YOUR_API_KEY_HERE';
    }

    private function makeRequest($endpoint) {
        $url = $this->baseUrl . $endpoint;
        
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        $response = curl_exec($ch);
        curl_close($ch);

        return json_decode($response, true);
    }

    public function checkPnrStatus($pnrNumber) {
        $endpoint = "PNRCheck/apikey/{$this->apiKey}/PNRNumber/{$pnrNumber}/";
        return $this->makeRequest($endpoint);
    }

    public function getLiveTrainStatus($trainNumber, $date) {
        $endpoint = "livetrainstatus/apikey/{$this->apiKey}/trainnumber/{$trainNumber}/date/{$date}/";
        return $this->makeRequest($endpoint);
    }

    public function getLiveStation($stationCode, $hours) {
        $endpoint = "LiveStation/apikey/{$this->apiKey}/StationCode/{$stationCode}/hours/{$hours}/";
        return $this->makeRequest($endpoint);
    }

    public function searchTrains($from, $to, $date) {
        // Note: The API docs you provided don't have a direct train search endpoint like this.
        // This is a placeholder for a possible endpoint or a feature that might need a different API.
        // For now, it will return a mock response.
        return ['error' => 'Train search functionality is not available in the provided API endpoints.'];
    }
}
?>