<?php
declare(strict_types=1);
require_once __DIR__ . '/../../src/bootstrap.php';

if (!Auth::user()) {
    json_out(['ok' => false, 'error' => 'unauthorized'], 401);
}

try {
    Database::requireTicketsTable();
} catch (RuntimeException $e) {
    json_out(['ok' => false, 'error' => 'tickets_table_missing', 'hint' => $e->getMessage()], 503);
}

$user = Auth::user();
$method = strtoupper($_SERVER['REQUEST_METHOD'] ?? 'GET');

if ($method === 'GET') {
    $ticketId = (int) ($_GET['ticket_id'] ?? 0);
    if ($ticketId <= 0) {
        json_out(['ok' => false, 'error' => 'invalid ticket_id'], 400);
    }
    try {
        json_out(['ok' => true, 'attachments' => TicketAttachmentRepository::listForTicket($ticketId)]);
    } catch (Throwable $e) {
        if (str_contains($e->getMessage(), 'ticket_attachments') || str_contains($e->getMessage(), 'no such table')) {
            json_out(['ok' => false, 'error' => 'attachments_table_missing', 'hint' => 'Run sql/migrations/005_ticket_attachments.sql'], 503);
        }
        throw $e;
    }
}

if ($method === 'DELETE') {
    $id = (int) ($_GET['id'] ?? 0);
    if ($id <= 0) {
        json_out(['ok' => false, 'error' => 'invalid id'], 400);
    }
    try {
        TicketAttachmentRepository::delete($id, (string) ($user['username'] ?? ''));
        json_out(['ok' => true]);
    } catch (RuntimeException $e) {
        $code = $e->getMessage() === 'forbidden' ? 403 : 404;
        json_out(['ok' => false, 'error' => $e->getMessage()], $code);
    } catch (Throwable $e) {
        if (str_contains($e->getMessage(), 'ticket_attachments')) {
            json_out(['ok' => false, 'error' => 'attachments_table_missing'], 503);
        }
        throw $e;
    }
}

if ($method !== 'POST') {
    json_out(['ok' => false, 'error' => 'method not allowed'], 405);
}

$ticketId = (int) ($_POST['ticket_id'] ?? 0);
if ($ticketId <= 0) {
    $raw = file_get_contents('php://input');
    $data = is_string($raw) && $raw !== '' ? json_decode($raw, true) : null;
    if (is_array($data)) {
        $ticketId = (int) ($data['ticket_id'] ?? 0);
    }
}

if ($ticketId <= 0) {
    json_out(['ok' => false, 'error' => 'invalid ticket_id'], 400);
}

$ticket = TicketRepository::getById($ticketId);
if (!$ticket) {
    json_out(['ok' => false, 'error' => 'not found'], 404);
}
// Any logged-in user who can view the ticket may add attachments (same as comments).

try {
    if (!empty($_FILES['file']['name'])) {
        $att = TicketAttachmentRepository::addFile(
            $ticketId,
            (string) ($user['username'] ?? ''),
            $_FILES['file'],
            trim((string) ($_POST['title'] ?? ''))
        );
        json_out(['ok' => true, 'attachment' => $att]);
    }
    $raw = file_get_contents('php://input');
    $data = is_string($raw) && $raw !== '' ? json_decode($raw, true) : $_POST;
    if (!is_array($data)) {
        json_out(['ok' => false, 'error' => 'file or url required'], 400);
    }
    $url = trim((string) ($data['url'] ?? $data['external_url'] ?? ''));
    if ($url === '') {
        json_out(['ok' => false, 'error' => 'url required'], 400);
    }
    $att = TicketAttachmentRepository::addLink(
        $ticketId,
        (string) ($user['username'] ?? ''),
        $url,
        trim((string) ($data['title'] ?? ''))
    );
    json_out(['ok' => true, 'attachment' => $att]);
} catch (InvalidArgumentException $e) {
    json_out(['ok' => false, 'error' => $e->getMessage()], 400);
} catch (Throwable $e) {
    if (str_contains($e->getMessage(), 'ticket_attachments')) {
        json_out(['ok' => false, 'error' => 'attachments_table_missing'], 503);
    }
    error_log('ticket_attachments: ' . $e->getMessage());
    json_out(['ok' => false, 'error' => 'save failed'], 500);
}