<?php
/**
 * cron_weekly_health_report.php
 * يجري تشغيله في نهاية الأسبوع (يوم الأحد ليلاً) لتلخيص صحة السوق التنافسية.
 */

set_time_limit(0);
ini_set('memory_limit', '256M');

$_SERVER['REQUEST_METHOD'] = 'POST';

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

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

echo "[".date('Y-m-d H:i:s')."] Starting Weekly Market Health Report...\n";

try {
    $countries = ['SY', 'JO', 'EG', 'IQ']; // Countries we operate in or monitor
    
    foreach ($countries as $countryCode) {
        
        // 1. Calculate Average PCI and Market Share
        $sql = "SELECT distance_km, total_price 
                FROM competitor_prices 
                WHERE country_code = :country 
                  AND distance_km > 0
                  AND created_at >= DATE_SUB(NOW(), INTERVAL 7 DAY)";
        $stmt = $con->prepare($sql);
        $stmt->execute([':country' => $countryCode]);
        $trips = $stmt->fetchAll(PDO::FETCH_ASSOC);

        if (empty($trips)) {
            continue; // Skip if no data for this country
        }

        $sqlKazan = "SELECT speedPrice FROM kazan WHERE country = :country LIMIT 1";
        $stmtKazan = $con->prepare($sqlKazan);
        $countryNameMap = ['SY' => 'Syria', 'JO' => 'Jordan', 'EG' => 'Egypt', 'IQ' => 'Iraq'];
        $stmtKazan->execute([':country' => $countryNameMap[$countryCode] ?? 'Syria']);
        $kazanRow = $stmtKazan->fetch(PDO::FETCH_ASSOC);
        $currentSpeedPrice = $kazanRow ? (float)$kazanRow['speedPrice'] : 0;

        $pciSum = 0;
        $cheaperCount = 0;
        $totalTrips = count($trips);

        foreach ($trips as $trip) {
            $compPrice = (float)$trip['total_price'];
            $siroPrice = (float)$trip['distance_km'] * $currentSpeedPrice;
            
            if ($compPrice > 0) {
                $pciSum += ($siroPrice / $compPrice);
                if ($siroPrice < $compPrice) {
                    $cheaperCount++;
                }
            }
        }
        
        $averagePci = round($pciSum / $totalTrips, 2);
        $marketSharePct = round(($cheaperCount / $totalTrips) * 100, 2);

        // 2. Count Anomalies (Last 7 Days)
        $sqlAnomalies = "SELECT COUNT(*) as count FROM price_anomalies 
                         WHERE country_code = :country 
                           AND created_at >= DATE_SUB(NOW(), INTERVAL 7 DAY)";
        $stmtAnomalies = $con->prepare($sqlAnomalies);
        $stmtAnomalies->execute([':country' => $countryCode]);
        $anomaliesCount = (int)$stmtAnomalies->fetchColumn();

        // 3. Automated Campaigns / Surge Tracking (If applicable in logs)
        $sqlCampaigns = "SELECT COUNT(*) as count FROM marketing_campaigns_log 
                         WHERE JSON_EXTRACT(target_criteria, '$.country_code') = :country 
                           AND sent_at >= DATE_SUB(NOW(), INTERVAL 7 DAY)";
        $stmtCampaigns = $con->prepare($sqlCampaigns);
        $stmtCampaigns->execute([':country' => $countryCode]);
        $campaignsCount = (int)$stmtCampaigns->fetchColumn();

        // 4. Save to Database
        $reportData = [
            'total_competitor_samples' => $totalTrips,
            'automated_campaigns_sent' => $campaignsCount,
            'current_speed_price' => $currentSpeedPrice
        ];

        $sqlInsert = "INSERT INTO market_health_reports 
                      (report_date, country_code, average_pci, market_share_percent, total_anomalies, total_surge_opportunities, report_data_json)
                      VALUES (CURDATE(), :country, :pci, :market_share, :anomalies, :surge, :report_data)";
        $stmtInsert = $con->prepare($sqlInsert);
        $stmtInsert->execute([
            ':country' => $countryCode,
            ':pci' => $averagePci,
            ':market_share' => $marketSharePct,
            ':anomalies' => $anomaliesCount,
            ':surge' => 0, // Placeholder for actual surge count if tracked in DB
            ':report_data' => json_encode($reportData)
        ]);
        
        echo "[".date('Y-m-d H:i:s')."] Report generated for $countryCode. PCI: $averagePci, Share: $marketSharePct%\n";
    }

    echo "[".date('Y-m-d H:i:s')."] cron_weekly_health_report completed successfully.\n";

} catch (Exception $e) {
    echo "[".date('Y-m-d H:i:s')."] Error: " . $e->getMessage() . "\n";
}