<?php
/**
 * cron_ai_engine.php
 * المحرك الرئيسي للذكاء الاصطناعي (AI Engine)
 * يتم تشغيله كـ Cron Job كل 30 دقيقة أو ساعة لتقليل الضغط على السيرفر.
 * 
 * يدمج 3 وحدات (Modules) ذكية:
 * 1. AI Pricing (Total Price Math): تعديل جدول kazan ليكون السعر الإجمالي أرخص بـ 6.5% من المنافس الأقوى بدقة.
 * 2. AI Dispatch: تحديد مناطق الذروة وتوجيه السائقين إليها.
 * 3. AI Retention: اصطياد الركاب الخاملين.
 */

require_once __DIR__ . '/../core/bootstrap.php';
require_once __DIR__ . '/../functions.php';

try {
    $con = Database::get('main');
    $redis = getRedisConnection();
} catch (Exception $e) {
    die("Connection failed: " . $e->getMessage() . "\n");
}

echo "Starting Siro AI Engine...\n";

// نسبة الخصم المستهدفة (6.5% من إجمالي سعر الرحلة)
$targetMargin = 0.065; 

// ==========================================
// 1. وحدة التسعير الديناميكي بناءً على السعر الإجمالي
// ==========================================
echo "1. Running Smart Pricing Module (Total Price Formula)...\n";
try {
    $sql = "SELECT country_code, 
                   AVG(price_per_km) as avg_price_km,
                   MIN(price_per_km) as min_price_km
            FROM scraped_competitor_prices 
            WHERE created_at >= DATE_SUB(NOW(), INTERVAL 3 HOUR)
            AND price_per_km > 0
            GROUP BY country_code";
    
    $stmt = $con->query($sql);
    $competitorRates = $stmt->fetchAll(PDO::FETCH_ASSOC);

    foreach ($competitorRates as $rate) {
        $country = $rate['country_code'];
        $countryNameMap = ['JO' => 'Jordan', 'SY' => 'Syria', 'EG' => 'Egypt', 'IQ' => 'Iraq'];
        $countryName = $countryNameMap[$country] ?? null;
        
        if ($countryName) {
            $avgKmPrice = (float)$rate['avg_price_km'];
            $minKmPrice = (float)$rate['min_price_km'];
            
            // 1. حساب السعر الفعّال للكيلومتر بناءً على المتوسط والأرخص
            $effectiveCompetitorPrice = round($avgKmPrice * (1 - $targetMargin), 2);
            if ($effectiveCompetitorPrice > $minKmPrice) {
                $effectiveCompetitorPrice = round(($effectiveCompetitorPrice + $minKmPrice) / 2, 2);
            }
            
            // 2. الهندسة العكسية للسعر الإجمالي (Reverse Engineering)
            // بما أن سيرو يضيف سعر الدقيقة (والتي تعادل دقيقتين لكل كيلومتر تقريباً)، فإن التكلفة الإضافية للدقائق ترفع السعر الإجمالي بمقدار 1.5x
            // لضمان أن يكون السعر النهائي أقل بـ 6%، نقسم الناتج على 1.5 ليمتص تكلفة الدقائق.
            $calculatedSpeedPrice = round($effectiveCompetitorPrice / 1.5, 3);
            
            // 3. تسعير الفئات المتعددة
            $newSpeedPrice      = $calculatedSpeedPrice;
            $newComfortPrice    = round($newSpeedPrice * 1.30, 3);
            $newLadyPrice       = round($newSpeedPrice * 1.10, 3);
            $newElectricPrice   = round($newSpeedPrice * 1.20, 3);
            $newVanPrice        = round($newSpeedPrice * 1.50, 3);
            $newDeliveryPrice   = round($newSpeedPrice * 0.90, 3);
            $newMishwarVipPrice = round($newSpeedPrice * 1.40, 3); 
            $newFixedPrice      = $newSpeedPrice; 
            $newAwfarPrice      = round($newSpeedPrice * 0.85, 3);
            
            // أسعار الدقائق
            if ($country === 'JO') {
                $newNormalMin = 0.06;
                $newPeakMin   = 0.07;
                $newLateMin   = 0.08;
            } else {
                $newNormalMin = round($newSpeedPrice / 4, 3);
                $newPeakMin   = round($newNormalMin * 1.15, 3);
                $newLateMin   = round($newNormalMin * 1.25, 3);
            }

            $updateSql = "UPDATE kazan 
                          SET speedPrice = :speedPrice,
                              comfortPrice = :comfortPrice,
                              ladyPrice = :ladyPrice,
                              electricPrice = :electricPrice,
                              vanPrice = :vanPrice,
                              deliveryPrice = :deliveryPrice,
                              mishwarVipPrice = :mishwarVipPrice,
                              fixedPrice = :fixedPrice,
                              awfarPrice = :awfarPrice,
                              normalMinPrice = :normalMin,
                              peakMinPrice = :peakMin,
                              lateMinPrice = :lateMin
                          WHERE country = :countryName";
            $upStmt = $con->prepare($updateSql);
            $upStmt->execute([
                ':speedPrice'      => $newSpeedPrice,
                ':comfortPrice'    => $newComfortPrice,
                ':ladyPrice'       => $newLadyPrice,
                ':electricPrice'   => $newElectricPrice,
                ':vanPrice'        => $newVanPrice,
                ':deliveryPrice'   => $newDeliveryPrice,
                ':mishwarVipPrice' => $newMishwarVipPrice,
                ':fixedPrice'      => $newFixedPrice,
                ':awfarPrice'      => $newAwfarPrice,
                ':normalMin'       => $newNormalMin,
                ':peakMin'         => $newPeakMin,
                ':lateMin'         => $newLateMin,
                ':countryName'     => $countryName
            ]);
            
            echo "   -> Updated $countryName (Total Price Math applied): Speed=$newSpeedPrice JOD/KM, NormalMin=$newNormalMin JOD/MIN\n";
        }
    }
} catch (Exception $e) {
    echo "   Error in Pricing Module: " . $e->getMessage() . "\n";
}

// ==========================================
// 2. وحدة توجيه السائقين (Demand Predictor)
// ==========================================
echo "2. Running Demand Predictor Module...\n";
try {
    $cacheJson = $redis->get('siro:cache:pricing:grids');
    $hotZones = [];
    if ($cacheJson) {
        $grids = json_decode($cacheJson, true)['grids'] ?? [];
        foreach ($grids as $key => $data) {
            if (strpos($key, 'FALLBACK') !== false) continue;
            
            if ($data['avg_price'] > 0) {
                $parts = explode('_', $key);
                if (count($parts) == 3) {
                    $hotZones[] = [
                        'latitude' => (float)$parts[1],
                        'longitude' => (float)$parts[2],
                        'avg_price' => $data['avg_price'],
                        'top_competitor' => $data['top_competitor'],
                        'timestamp' => time()
                    ];
                }
            }
        }
        
        $redis->set('siro:cache:ai:hotzones', json_encode(['status' => 'success', 'data' => $hotZones], JSON_UNESCAPED_UNICODE));
        echo "   -> Saved " . count($hotZones) . " Hot Zones to Redis for Driver Map Guidance.\n";
    }
} catch (Exception $e) {
    echo "   Error in Demand Predictor: " . $e->getMessage() . "\n";
}

// ==========================================
// 3. وحدة استهداف الركاب الخاملين (Smart Retention)
// ==========================================
echo "3. Running Smart Retention Module...\n";
try {
    $sql = "SELECT source, COUNT(*) as opens
            FROM passenger_opening_locations
            WHERE created_at >= DATE_SUB(NOW(), INTERVAL 3 HOUR)
            GROUP BY source
            HAVING opens >= 3";
            
    $stmt = $con->query($sql);
    $idleRiders = $stmt->fetchAll(PDO::FETCH_ASSOC);
    
    $notifiedCount = count($idleRiders);
    echo "   -> Identified $notifiedCount idle riders requiring push notifications.\n";
} catch (Exception $e) {
    echo "   Error in Smart Retention: " . $e->getMessage() . "\n";
}

echo "AI Engine finished successfully.\n";
?>