<?php
require_once 'db/config.php';

if (!isset($_GET['id']) || !filter_var($_GET['id'], FILTER_VALIDATE_INT)) {
    header("Location: index.php");
    exit;
}

$paper_id = $_GET['id'];
$pdo = db();

// Optional: Check if paper exists before deleting
$stmt = $pdo->prepare("SELECT id FROM papers WHERE id = ?");
$stmt->execute([$paper_id]);
if ($stmt->rowCount() === 0) {
    // Paper not found, maybe already deleted
    header("Location: index.php?error=notfound");
    exit;
}

// Delete the paper
try {
    $stmt = $pdo->prepare("DELETE FROM papers WHERE id = ?");
    $stmt->execute([$paper_id]);
    header("Location: index.php?success=deleted");
    exit;
} catch (PDOException $e) {
    // Log error if you have a logging system
    header("Location: index.php?error=deletfailed");
    exit;
}