<?php
/**
 * get_competitor_context.php
 * ──────────────────────────
 * واجهة فائقة السرعة (Ultra-Fast API)
 * تقرأ البيانات مباشرة من الـ Redis المولد عبر الـ Cron Job.
 * زمن الاستجابة: O(1).
 */

header('Content-Type: application/json; charset=utf-8');
require_once __DIR__ . '/../../connect.php'; // Web-safe

$lat = filterRequest('lat');
$lng = filterRequest('lng');
$countryCode = filterRequest('country_code');

if (!$lat || !$lng || !$countryCode) {
    echo json_encode(["status" => "error", "message" => "Missing parameters"]);
    exit;
}

$lat = (float)$lat;
$lng = (float)$lng;
$countryCode = strtoupper($countryCode);

try {
    $redis = getRedisConnection();
    $cacheJson = $redis->get('siro:cache:pricing:grids');
} catch (Exception $e) {
    echo json_encode(["status" => "error", "message" => "Redis connection failed"]);
    exit;
}

if (!$cacheJson) {
    echo json_encode(["status" => "success", "data" => null, "message" => "Cache not generated yet"]);
    exit;
}

$cacheData = json_decode($cacheJson, true);

if (!$cacheData || !isset($cacheData['grids'])) {
    echo json_encode(["status" => "success", "data" => null, "message" => "Invalid cache data"]);
    exit;
}

// محاولة إيجاد الشبكة (Grid) للراكب
$gridSize = 0.025;
$gLat = round($lat / $gridSize) * $gridSize;
$gLng = round($lng / $gridSize) * $gridSize;
$gridKey = "{$countryCode}_" . number_format($gLat, 3) . "_" . number_format($gLng, 3);

$grids = $cacheData['grids'];

if (isset($grids[$gridKey])) {
    $compData = $grids[$gridKey];
} else {
    // إذا لم نجد، نستخدم الـ Fallback للدولة
    $fallbackKey = "{$countryCode}_FALLBACK";
    if (isset($grids[$fallbackKey])) {
        $compData = $grids[$fallbackKey];
    } else {
        echo json_encode(["status" => "success", "data" => null, "message" => "No data for this region"]);
        exit;
    }
}

$avgPrice = $compData['avg_price'];
$topComp  = $compData['top_competitor'] ?? 'Other';

// جلب سعر Siro للمقارنة السريعة
$sqlKazan = "SELECT (price_km + start_price) AS siro_base 
             FROM kazan 
             WHERE country_code = :cc AND type = 'speed'
             LIMIT 1";
$stmtKazan = $con->prepare($sqlKazan);
$stmtKazan->execute([':cc' => $countryCode]);
$kazanRow = $stmtKazan->fetch(PDO::FETCH_ASSOC);

$siroPrice = $kazanRow ? (float)$kazanRow['siro_base'] : $avgPrice * 0.9; 

$savingsPct = 0;
if ($avgPrice > 0 && $siroPrice < $avgPrice) {
    $savingsPct = (($avgPrice - $siroPrice) / $avgPrice) * 100;
}

$passengerMessage = null;
$driverMessage = null;
$extraEarnings = 0;

if ($savingsPct > 2) { 
    $compNameAr = match(strtolower($topComp)) {
        'careem'  => 'كريم',
        'uber'    => 'أوبر',
        'yallago' => 'يلا غو',
        'jenny'   => 'جيني',
        default   => 'التطبيقات الأخرى'
    };
    
    $passengerMessage = "أوفر بـ " . number_format($savingsPct, 1) . "% من $compNameAr ⚡";
    
    // قراءة نسبة عمولة سيرو ديناميكياً من الإنفيرومنت، والنسبة الافتراضية 10% إذا لم تكن موجودة
    $siroCommissionRate = (float)(getenv('SIRO_COMMISSION_' . $countryCode) ?: 0.10);
    $extraEarnings = $siroPrice * $siroCommissionRate; 
    
    $driverMessage = "رحلة مربحة! تكسب أكثر مقارنة بـ $compNameAr 💰";
}

echo json_encode([
    "status" => "success",
    "data" => [
        "competitor_avg_price" => $avgPrice,
        "top_competitor" => $topComp,
        "savings_percent" => $savingsPct,
        "passenger_badge_text" => $passengerMessage,
        "driver_badge_text" => $driverMessage,
        "driver_extra_earnings" => round($extraEarnings, 2),
        "source" => "redis_cache"
    ]
]);
?>