<?php

class NotionClient {
    private $apiKey;
    private $version = '2025-09-03';
    private $baseUrl = 'https://api.notion.com/v1';

    public function __construct($apiKey) {
        $this->apiKey = trim($apiKey);
    }

    private function makeRequest($endpoint, $method = 'GET', $data = null) {
        $ch = curl_init();
        $url = $this->baseUrl . $endpoint;
        
        $headers = [
            'Authorization: Bearer ' . $this->apiKey,
            'Notion-Version: ' . $this->version,
            'Content-Type: application/json'
        ];

        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);

        if ($method === 'POST') {
            curl_setopt($ch, CURLOPT_POST, true);
            if ($data) {
                curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));
            }
        }

        $response = curl_exec($ch);
        $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        
        if (curl_errno($ch)) {
            throw new Exception("Curl Error: " . curl_error($ch));
        }

        curl_close($ch);

        if ($httpCode >= 400) {
            // For debugging purposes, you might want to log the response
             error_log("Notion API Error ($httpCode): $response");
            return null;
        }

        return json_decode($response, true);
    }

    public function search($query) {
        $data = [
            'query' => $query,
            'page_size' => 3, // Limit to top 3 results
            'filter' => [
                'value' => 'page',
                'property' => 'object'
            ],
            'sort' => [
                'direction' => 'descending',
                'timestamp' => 'last_edited_time'
            ]
        ];

        return $this->makeRequest('/search', 'POST', $data);
    }

    public function getPageContent($pageId) {
        $response = $this->makeRequest("/blocks/$pageId/children", 'GET');
        
        if (!$response || !isset($response['results'])) {
            return "";
        }

        $content = "";
        $maxLength = 1500; // Limit content length to avoid token limits

        foreach ($response['results'] as $block) {
            if (strlen($content) >= $maxLength) {
                $content .= "...(내용 생략됨)...";
                break;
            }

            $type = $block['type'];
            if (isset($block[$type]) && isset($block[$type]['rich_text'])) {
                foreach ($block[$type]['rich_text'] as $text) {
                    $content .= $text['plain_text'];
                }
                $content .= "\n";
            }
        }
        
        return $content;
    }
}
?>