<?php
require_once __DIR__ . '/../includes/db.php';
require_once __DIR__ . '/../includes/auth.php';

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

if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
    http_response_code(405);
    echo json_encode(['error' => 'Method not allowed']);
    exit;
}

$input = json_decode(file_get_contents('php://input'), true);

// 1. Generate Itinerary (Mock fallback if API keys are missing)
function getMockItinerary($input) {
    return [
        'days' => [
            [
                'day' => 1,
                'items' => [
                    ['place_name' => 'Göreme Açık Hava Müzesi', 'category' => 'History', 'estimated_duration_minutes' => 120, 'description' => 'Historical cave churches.'],
                    ['place_name' => 'Paşabağları', 'category' => 'Nature', 'estimated_duration_minutes' => 90, 'description' => 'Fairy chimneys.']
                ]
            ]
        ]
    ];
}

// 2. Google Places Lookup (Cache Check)
function getPlaceDetails($pdo, $placeName) {
    $normalized = strtolower(trim($placeName));
    
    $stmt = $pdo->prepare("SELECT * FROM places_cache WHERE place_name_normalized = ?");
    $stmt->execute([$normalized]);
    $cached = $stmt->fetch(PDO::FETCH_ASSOC);
    
    if ($cached) return $cached;

    $apiKey = getenv('GOOGLE_MAPS_API_KEY');
    if (!$apiKey) return null;

    $url = "https://maps.googleapis.com/maps/api/place/textsearch/json?query=" . urlencode($placeName . " Cappadocia") . "&key=" . $apiKey;
    $response = json_decode(file_get_contents($url), true);

    if (!empty($response['results'])) {
        $r = $response['results'][0];
        $data = [
            'place_name_normalized' => $normalized,
            'place_id' => $r['place_id'],
            'name' => $r['name'],
            'formatted_address' => $r['formatted_address'],
            'lat' => $r['geometry']['location']['lat'],
            'lng' => $r['geometry']['location']['lng'],
            'rating' => $r['rating'] ?? 0,
            'photo_reference' => $r['photos'][0]['photo_reference'] ?? null
        ];

        $stmt = $pdo->prepare("INSERT INTO places_cache (place_name_normalized, place_id, name, formatted_address, lat, lng, rating, photo_reference) VALUES (?, ?, ?, ?, ?, ?, ?, ?)");
        $stmt->execute(array_values($data));
        return $data;
    }
    return null;
}

// Logic: Attempt OpenAI, fallback to mock
$itinerary = getMockItinerary($input); // Simplified for now

// Enrich with Places
foreach ($itinerary['days'] as &$day) {
    foreach ($day['items'] as &$item) {
        $details = getPlaceDetails($pdo, $item['place_name']);
        if ($details) {
            $item['place_id'] = $details['place_id'];
            $item['lat'] = $details['lat'];
            $item['lng'] = $details['lng'];
        }
    }
}

echo json_encode(['success' => true, 'itinerary' => $itinerary]);