<?php
/**
 * winback_hotspot_targets.php
 * جلب قائمة بالركاب المنقطعين عن التطبيق (أكثر من 30 يوم) 
 * والذين يتواجدون حالياً بالقرب من مناطق تشهد ذروة لدى المنافسين (Hotspots)
 */

require_once __DIR__ . '/../../connect.php';

if ($role !== 'admin' && $role !== 'super_admin') {
    http_response_code(403);
    echo json_encode(['status' => 'failure', 'message' => 'Unauthorized']);
    exit;
}

try {
    $countryCode = resolveAdminCountry(filterRequest('country_code'), $role, $admin_country ?? null);
    
    if (!$countryCode) {
        jsonError("Missing required parameter: country_code");
        exit;
    }

    // 1. Fetch active surge hotspots from Redis
    $surgeKey = "surge:opportunities:{$countryCode}";
    $hotspotsJson = $redis->get($surgeKey);
    $hotspots = $hotspotsJson ? json_decode($hotspotsJson, true) : [];
    
    if (empty($hotspots)) {
        jsonSuccess(['targets' => [], 'message' => 'No active competitor hotspots found right now.']);
        exit;
    }

    // Extract latitudes and longitudes of the grids
    $hotspotGrids = [];
    foreach ($hotspots as $grid => $multiplier) {
        list($lat, $lng) = explode('_', $grid);
        $hotspotGrids[] = ['lat' => (float)$lat, 'lng' => (float)$lng];
    }

    // 2. Build geographic query to find dormant passengers near these hotspots
    // 30 days dormant = No ride in 30 days
    
    $whereClauses = [];
    $params = [':country' => $countryCode];
    $i = 0;
    
    foreach ($hotspotGrids as $h) {
        $lat = $h['lat'];
        $lng = $h['lng'];
        // Approx bounding box for 2km around the grid center
        $latMin = $lat - 0.018;
        $latMax = $lat + 0.018;
        $lngMin = $lng - 0.018;
        $lngMax = $lng + 0.018;
        
        $whereClauses[] = "(lat BETWEEN :latMin$i AND :latMax$i AND lng BETWEEN :lngMin$i AND :lngMax$i)";
        $params[":latMin$i"] = $latMin;
        $params[":latMax$i"] = $latMax;
        $params[":lngMin$i"] = $lngMin;
        $params[":lngMax$i"] = $lngMax;
        $i++;
    }
    
    $geoWhere = implode(' OR ', $whereClauses);

    // Query passenger_opening_locations or users table
    $sql = "SELECT DISTINCT u.users_id, u.users_name, u.users_phone, p.lat, p.lng 
            FROM users u
            JOIN passenger_opening_locations p ON u.users_id = p.passenger_id
            WHERE u.country_code = :country 
              AND u.users_type = 1 
              AND u.last_ride_date < DATE_SUB(NOW(), INTERVAL 30 DAY)
              AND ($geoWhere)
            LIMIT 1000";

    $stmt = $con->prepare($sql);
    $stmt->execute($params);
    $targets = $stmt->fetchAll(PDO::FETCH_ASSOC);

    jsonSuccess([
        'total_targets' => count($targets),
        'hotspots_count' => count($hotspotGrids),
        'targets' => $targets
    ]);

} catch (Exception $e) {
    error_log("[winback_hotspot_targets] Error: " . $e->getMessage());
    jsonError("Failed to fetch targets");
}