<?php
/**
 * cron_ai_engine.php - AI Pricing Engine v2
 * 
 * يقرأ معادلات المنافسين من Node.js Pricing Engine (competitor_secret_formulas)
 * ويطبّق تسعيراً ذكياً بناءً على النتائج الإحصائية بدلاً من الحسابات البدائية.
 * 
 * لم يعُد هذا الملف يحسب بنفسه - بل يعتمد على التحليل الإحصائي من pricing-engine.
 */

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 v2 (Powered by Pricing Engine)...\n";

// ==========================================
// 1. التسعير الديناميكي بناءً على المعادلات الإحصائية
// ==========================================
echo "1. Reading competitor formulas from Pricing Engine...\n";
try {
    // قراءة آخر المعادلات من التحليل الإحصائي
    $sql = "SELECT * FROM competitor_secret_formulas 
            WHERE last_updated >= DATE_SUB(NOW(), INTERVAL 24 HOUR)
            ORDER BY last_updated DESC";
    $stmt = $con->query($sql);
    $formulas = $stmt->fetchAll(PDO::FETCH_ASSOC);

    if (empty($formulas)) {
        echo "   ⚠️ No recent formulas found. Run pricing-engine first.\n";
    } else {
        // تجميع المعادلات حسب الدولة
        $byCountry = [];
        foreach ($formulas as $f) {
            $country = $f['country_code'];
            if (!isset($byCountry[$country])) $byCountry[$country] = [];
            $byCountry[$country][] = $f;
        }

        foreach ($byCountry as $country => $countryFormulas) {
            $countryNameMap = ['JO' => 'Jordan', 'SY' => 'Syria', 'EG' => 'Egypt', 'IQ' => 'Iraq'];
            $countryName = $countryNameMap[$country] ?? $country;

            // اختيار أفضل معادلة للتسعير حسب الأولوية:
            // 1. Economy tier (الأكثر تنافسية)
            // 2. Standard tier (إذا ما في Economy)
            // 3. أي tier ثاني بأعلى R²
            $tierPriority = ['standard', 'economy', 'premium'];
            $bestFormula = null;
            $bestTierIdx = 999;

            foreach ($countryFormulas as $f) {
                $tier = $f['tier'] ?? 'standard';
                $tierIdx = array_search($tier, $tierPriority);
                if ($tierIdx === false) $tierIdx = 999;
                
                $currentRSq = (float)($f['r_squared'] ?? 0);
                $currentKm = (float)($f['price_per_km'] ?? 0);
                
                // أفضلية: Tier أعلى أولوية، ثم R² أعلى
                if ($currentKm > 0 && (
                    $bestFormula === null ||
                    $tierIdx < $bestTierIdx ||
                    ($tierIdx === $bestTierIdx && $currentRSq > (float)($bestFormula['r_squared'] ?? 0))
                )) {
                    $bestTierIdx = $tierIdx;
                    $bestFormula = $f;
                }
            }

            if ($bestFormula) {
                $bestKmRate = (float)$bestFormula['price_per_km'];
                $bestMinRate = (float)$bestFormula['price_per_min'];
                $bestBaseFare = (float)$bestFormula['base_fare'];
                $bestMinFare = (float)$bestFormula['min_fare'];
                $bestRSq = (float)($bestFormula['r_squared'] ?? 0);
            }

            if ($bestKmRate === null) {
                echo "   ⚠️ No valid formula for $countryName. Skipping.\n";
                continue;
            }

            // تسعير Siro: أرخص بنسبة 6.5% من المنافس مع الحفاظ على هيكل التسعير
            $discountFactor = 1 - 0.065;
            $ourKmRate = round($bestKmRate * $discountFactor, 3);
            $ourMinRate = round($bestMinRate * $discountFactor, 3);
            $ourBase = round($bestBaseFare * $discountFactor, 3);

            echo "   📊 $countryName: Using formula (R²=$bestRSq)\n";
            echo "      Competitor: KM=$bestKmRate, MIN=$bestMinRate, Base=$bestBaseFare, MinFare=$bestMinFare\n";
            echo "      Siro (6.5% less): KM=$ourKmRate, MIN=$ourMinRate, Base=$ourBase\n";

            // تحديث جدول kazan
            $speedPrice = $ourKmRate;
            $comfortPrice = round($ourKmRate * 1.30, 3);
            $ladyPrice = round($ourKmRate * 1.10, 3);
            $electricPrice = round($ourKmRate * 1.20, 3);
            $vanPrice = round($ourKmRate * 1.50, 3);
            $deliveryPrice = round($ourKmRate * 0.90, 3);
            $mishwarVipPrice = round($ourKmRate * 1.40, 3);
            $fixedPrice = $speedPrice;
            $awfarPrice = round($ourKmRate * 0.85, 3);

            // أسعار الدقائق
            if ($country === 'JO') {
                $normalMin = $ourMinRate > 0 ? $ourMinRate : 0.05;
                $peakMin = round($normalMin * 1.15, 3);
                $lateMin = $normalMin;
            } else {
                $normalMin = $ourMinRate > 0 ? $ourMinRate : round($speedPrice / 4, 3);
                $peakMin = round($normalMin * 1.15, 3);
                $lateMin = round($normalMin * 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,
                              startPrice = :startPrice
                          WHERE country = :countryName";

            $upStmt = $con->prepare($updateSql);
            $upStmt->execute([
                ':speedPrice'      => $speedPrice,
                ':comfortPrice'    => $comfortPrice,
                ':ladyPrice'       => $ladyPrice,
                ':electricPrice'   => $electricPrice,
                ':vanPrice'        => $vanPrice,
                ':deliveryPrice'   => $deliveryPrice,
                ':mishwarVipPrice' => $mishwarVipPrice,
                ':fixedPrice'      => $fixedPrice,
                ':awfarPrice'      => $awfarPrice,
                ':normalMin'       => $normalMin,
                ':peakMin'         => $peakMin,
                ':lateMin'         => $lateMin,
                ':startPrice'      => $ourBase,
                ':countryName'     => $countryName
            ]);

            echo "   ✅ Updated $countryName pricing in kazan table.\n";
        }
    }
} catch (Exception $e) {
    echo "   ❌ Error in Pricing Module: " . $e->getMessage() . "\n";
}

// ==========================================
// 2. قراءة Surge Insights من الـ Pricing Engine
// ==========================================
echo "2. Reading surge insights from Pricing Engine...\n";
try {
    $sql = "SELECT * FROM competitor_surge_insights 
            WHERE detected_at >= DATE_SUB(NOW(), INTERVAL 12 HOUR)
            ORDER BY surge_multiplier DESC
            LIMIT 20";
    $stmt = $con->query($sql);
    $surgeRecords = $stmt->fetchAll(PDO::FETCH_ASSOC);

    if (!empty($surgeRecords)) {
        $surgeByCountry = [];
        foreach ($surgeRecords as $sr) {
            $country = $sr['country_code'];
            if (!isset($surgeByCountry[$country])) {
                $surgeByCountry[$country] = [
                    'avg_multiplier' => 0,
                    'count' => 0,
                    'peak_hours' => []
                ];
            }
            $surgeByCountry[$country]['avg_multiplier'] += $sr['surge_multiplier'];
            $surgeByCountry[$country]['count']++;
            $surgeByCountry[$country]['peak_hours'][] = "{$sr['peak_start_hour']}:00-{$sr['peak_end_hour']}:00";
        }

        foreach ($surgeByCountry as $country => $data) {
            $avgMult = round($data['avg_multiplier'] / $data['count'], 3);
            $peakHoursStr = implode(', ', array_unique($data['peak_hours']));

            // تخزين معلومات الـ Surge في Redis — مفتاحين:
            // 1. surge:opportunities (متوافق مع get.php الحالي)
            // 2. surge:opportunities:{country} (متوافق مع cron_kazan_adjuster.php)
            $surgeData = [
                'avg_competitor_surge' => $avgMult,
                'suggested_multiplier' => round(1.0 + ($avgMult - 1.0) * 0.6, 3),
                'peak_hours' => $data['peak_hours'],
                'updated_at' => date('Y-m-d H:i:s')
            ];
            $redis->setex("surge:opportunities", 7200, json_encode($surgeData));
            $redis->setex("surge:opportunities:{$country}", 7200, json_encode($surgeData));

            echo "   ⚡ $country: Avg competitor surge = {$avgMult}x, peak hours: {$peakHoursStr}\n";
        }
    } else {
        echo "   ℹ️ No recent surge insights found.\n";
    }
} catch (Exception $e) {
    echo "   ❌ Error in Surge Module: " . $e->getMessage() . "\n";
}

// ==========================================
// 3. وحدة استهداف الركاب الخاملين (Smart Retention) - كما هي
// ==========================================
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";
}

// ==========================================
// 4. Export AI Hotzones to Redis for Captains
// ==========================================
echo "4. Exporting AI Hotzones to Redis...\n";
try {
    $sql = "SELECT latitude, longitude, competitor_name AS top_competitor, avg_ppk AS avg_price 
            FROM competitor_surge_zones 
            WHERE detected_at >= DATE_SUB(NOW(), INTERVAL 6 HOUR)
            AND surge_multiplier > 1.1";
    
    $stmt = $con->query($sql);
    $zones = $stmt->fetchAll(PDO::FETCH_ASSOC);
    
    if (!empty($zones)) {
        $redisData = [
            'status' => 'success',
            'data' => $zones
        ];
        $redis->setex('siro:cache:ai:hotzones', 3600, json_encode($redisData));
        echo "   🗺️  Exported " . count($zones) . " hot zones to Redis (siro:cache:ai:hotzones).\n";
    } else {
        // Clear if no surge to avoid stale data
        $redis->del('siro:cache:ai:hotzones');
        echo "   ℹ️ No active hot zones to export.\n";
    }
} catch (Exception $e) {
    echo "   ❌ Error in Hotzones Export: " . $e->getMessage() . "\n";
}

echo "AI Engine v2 finished successfully.\n";