<?php

/*
 * ITFlow - GET/POST request handler for AI Functions
 */

// TODO: Should this be moved to AJAX?

if (isset($_GET['ai_reword'])) {

    header('Content-Type: application/json');

    // Collecting the input data from the AJAX request.
    $inputJSON = file_get_contents('php://input');
    $input = json_decode($inputJSON, TRUE); // Convert JSON into array.

    $promptText = "reword with html format";
    $userText = $input['text'];

    // Preparing the data for the OpenAI Chat API request.
    $data = [
        "model" => "$config_ai_model", // Specify the model
        "messages" => [
            ["role" => "system", "content" => $promptText],
            ["role" => "user", "content" => $userText],
        ],
        "temperature" => 0.7
    ];

    // Initialize cURL session to the OpenAI Chat API.
    $ch = curl_init("$config_ai_url");

    // Set cURL options for the request.
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));
    curl_setopt($ch, CURLOPT_HTTPHEADER, [
        'Content-Type: application/json',
        'Authorization: Bearer ' . $config_ai_api_key,
    ]);

    // Execute the cURL session and capture the response.
    $response = curl_exec($ch);
    curl_close($ch);

    // Decode the JSON response.
    $responseData = json_decode($response, true);

    // Check if the response contains the expected data and return it.
    if (isset($responseData['choices'][0]['message']['content'])) {
        // Remove any square brackets and their contents from the response.
        $responseData['choices'][0]['message']['content'] = preg_replace('/\[.*?\]/', '', $responseData['choices'][0]['message']['content']);
        echo json_encode(['rewordedText' => trim($responseData['choices'][0]['message']['content'])]);
    } else {
        // Handle errors or unexpected response structure.
        echo json_encode(['rewordedText' => 'Failed to get a response from the OpenAI API.']);
    }

}

if (isset($_GET['ai_ticket_summary'])) {

    // Retrieve the ticket_id from POST
    $ticket_id = intval($_POST['ticket_id']);

    // Query the database for ticket details
    // (You can reuse code from ticket.php or write a simplified query here)
    $sql = mysqli_query($mysqli, "
        SELECT ticket_subject, ticket_details
        FROM tickets
        WHERE ticket_id = $ticket_id
        LIMIT 1
    ");
    $row = mysqli_fetch_assoc($sql);
    $ticket_subject = $row['ticket_subject'];
    $ticket_details = strip_tags($row['ticket_details']); // strip HTML for cleaner prompt

    // Get ticket replies
    $sql_replies = mysqli_query($mysqli, "
        SELECT ticket_reply, ticket_reply_type
        FROM ticket_replies
        WHERE ticket_reply_ticket_id = $ticket_id
        AND ticket_reply_archived_at IS NULL
        ORDER BY ticket_reply_id ASC
    ");

    $all_replies_text = "";
    while ($reply = mysqli_fetch_assoc($sql_replies)) {
        $reply_type = $reply['ticket_reply_type'];
        $reply_text = strip_tags($reply['ticket_reply']);
        $all_replies_text .= "\n[$reply_type]: $reply_text";
    }

    // Craft a prompt for ChatGPT
    $prompt = "Summarize the following ticket and its responses in a concise and clear way. The summary should be short, highlight the main issue, the actions taken, and any resolution steps:\n\nTicket Subject: $ticket_subject\nTicket Details: $ticket_details\nReplies:$all_replies_text\n\nShort Summary:";

    // Prepare the POST data
    $post_data = [
        "model" => "$config_ai_model",
        "messages" => [
            ["role" => "system", "content" => "You are a helpful assistant."],
            ["role" => "user", "content" => $prompt]
        ],
        "temperature" => 0.7
    ];

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $config_ai_url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_HTTPHEADER, [
        'Content-Type: application/json',
        'Authorization: Bearer ' . $config_ai_api_key,
    ]);
    curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($post_data));

    $response = curl_exec($ch);
    if (curl_errno($ch)) {
        echo "Error: " . curl_error($ch);
        exit;
    }
    curl_close($ch);

    $response_data = json_decode($response, true);
    $summary = $response_data['choices'][0]['message']['content'] ?? "No summary available.";

    // Print the summary
    echo nl2br(htmlentities($summary));
}