<?php

/**
 * tickets_api.php — Bearer-key read endpoint (list/triage + read-one).
 *
 * GET only. Requires 'read' scope (a 'read_write' key also satisfies it).
 * Acts as a trusted automation/server credential: reads return the full queue
 * (no per-user visibility filtering).
 *
 *   GET ?ticket_id=NNN            -> {success, ticket, comments}
 *   GET ?status=&priority=&host=  -> {success, tickets, page, total, pages}
 *       &page=&limit=
 */

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

error_reporting(E_ALL);
ini_set('display_errors', 0);

// Rate limiting (same pattern as the other Bearer API endpoints)
require_once dirname(__DIR__) . '/middleware/RateLimitMiddleware.php';
RateLimitMiddleware::apply('api');

require_once dirname(__DIR__) . '/config/config.php';
require_once dirname(__DIR__) . '/helpers/Database.php';
require_once dirname(__DIR__) . '/middleware/ApiKeyAuth.php';
require_once dirname(__DIR__) . '/models/TicketModel.php';
require_once dirname(__DIR__) . '/models/CommentModel.php';

try {
    $conn = Database::getConnection();
} catch (Throwable $e) {
    error_log('tickets_api: DB connection failed: ' . $e->getMessage());
    http_response_code(500);
    echo json_encode(['success' => false, 'error' => 'Internal server error']);
    exit;
}

$apiKeyAuth = new ApiKeyAuth($conn);

try {
    $apiKeyAuth->authenticate();
} catch (Exception $e) {
    // ApiKeyAuth already sent the 401 response.
    exit;
}

// Reads only need the 'read' scope.
$apiKeyAuth->requireScope('read');

if ($_SERVER['REQUEST_METHOD'] !== 'GET') {
    http_response_code(405);
    echo json_encode(['success' => false, 'error' => 'Method not allowed. Use GET.']);
    exit;
}

$ticketModel = new TicketModel($conn);

// ── READ ONE ──────────────────────────────────────────────────────────────
if (isset($_GET['ticket_id']) && trim((string)$_GET['ticket_id']) !== '') {
    $ticketId = trim((string)$_GET['ticket_id']);

    $ticket = $ticketModel->getTicketById($ticketId);
    if (!$ticket) {
        http_response_code(404);
        echo json_encode(['success' => false, 'error' => 'Ticket not found']);
        exit;
    }

    // Flat list of comments (newest first) — same fetch the ticket view uses.
    $commentModel = new CommentModel($conn);
    $comments = $commentModel->getCommentsByTicketId($ticketId, false);

    echo json_encode([
        'success' => true,
        'ticket' => $ticket,
        'comments' => $comments,
    ]);
    exit;
}

// ── LIST / TRIAGE ───────────────────────────────────────────────────────────
$status = (isset($_GET['status']) && trim((string)$_GET['status']) !== '')
    ? trim((string)$_GET['status'])
    : 'Open';

$page = isset($_GET['page']) ? (int)$_GET['page'] : 1;
if ($page < 1) {
    $page = 1;
}

$limit = isset($_GET['limit']) ? (int)$_GET['limit'] : 25;
if ($limit < 1) {
    $limit = 25;
}
if ($limit > 100) {
    $limit = 100; // cap
}

$filters = [];
if (isset($_GET['priority']) && trim((string)$_GET['priority']) !== '') {
    $priority = (int)$_GET['priority'];
    if ($priority >= 1 && $priority <= 5) {
        // Exact-priority match via the min/max range filter.
        $filters['priority_min'] = $priority;
        $filters['priority_max'] = $priority;
    }
}

// hwmon puts the host in the title (e.g. "[hostname] ..."), so a host filter is a
// title substring match — served by getAllTickets's `search` param (title search).
$search = null;
if (isset($_GET['host']) && trim((string)$_GET['host']) !== '') {
    $search = trim((string)$_GET['host']);
}

// user = null => getAllTickets skips visibility filtering and returns the full
// queue (this is a trusted server credential, not an end user).
$result = $ticketModel->getAllTickets(
    $page,
    $limit,
    $status,
    'ticket_id',
    'desc',
    null,
    null,
    $search,
    $filters,
    null
);

echo json_encode([
    'success' => true,
    'tickets' => $result['tickets'],
    'page' => $result['current_page'],
    'total' => $result['total'],
    'pages' => $result['pages'],
]);
exit;