<?php
session_start();
require_once 'db/config.php';

// Ensure user is logged in and is an NGO
if (!isset($_SESSION['user_id']) || $_SESSION['user_role'] !== 'ngo') {
    header("Location: login.php");
    exit;
}

// Check if listing_id is provided
if (!isset($_GET['listing_id']) || !is_numeric($_GET['listing_id'])) {
    header("Location: dashboard.php?error=invalid_listing");
    exit;
}

$listing_id = $_GET['listing_id'];
$ngo_id = $_SESSION['user_id'];

$pdo = db();

// Check if the listing exists and is available
$stmt = $pdo->prepare("SELECT * FROM food_listings WHERE id = ? AND status = 'listed'");
$stmt->execute([$listing_id]);
$listing = $stmt->fetch();

if (!$listing) {
    header("Location: dashboard.php?error=listing_not_available");
    exit;
}

// Update the listing to mark it as claimed
$stmt = $pdo->prepare("UPDATE food_listings SET status = 'claimed', claimed_by_id = ? WHERE id = ?");
$success = $stmt->execute([$ngo_id, $listing_id]);

if ($success) {
    header("Location: dashboard.php?success=claimed");
} else {
    header("Location: dashboard.php?error=claim_failed");
}
exit;