<?php
/**
 * cron_dashboard_snapshot.php
 * يجمع بيانات التحليلات من Redis وقاعدة البيانات ويخزنها كملفات JSON مؤرشفة.
 *
 * الجدولة المقترحة:
 *   - لقطة سريعة (ساعي):  0 * * * *   php cron_dashboard_snapshot.php hourly
 *   - لقطة يومية:          0 3 * * *   php cron_dashboard_snapshot.php daily
 *   - لقطة أسبوعية:        0 4 * * 1   php cron_dashboard_snapshot.php weekly
 */

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

set_time_limit(180);
ini_set('memory_limit', '256M');

$mode = $argv[1] ?? 'hourly';
$today = date('Y-m-d');
$now = date('Y-m-d H:i:s');

$cacheBase = __DIR__ . '/../cache/analytics';
$todayDir = "$cacheBase/$today";

if (!is_dir($todayDir)) {
    mkdir($todayDir, 0755, true);
}

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

echo "[DashboardSnapshot] Mode: $mode | $now\n";

// ─────────────────────────────────────────────────────────────
// الوظائف المساعدة
// ─────────────────────────────────────────────────────────────
function saveSnapshot(string $filename, array $data, string $dir): void {
    $data['_generated_at'] = date('Y-m-d H:i:s');
    $data['_mode'] = $GLOBALS['mode'];
    $path = "$dir/$filename";
    file_put_contents($path, json_encode($data, JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT));
    echo "  ✓ Saved: $path\n";
}

function safeQuery(PDO $db, string $sql, array $params = []): array {
    $stmt = $db->prepare($sql);
    $stmt->execute($params);
    return $stmt->fetchAll(PDO::FETCH_ASSOC);
}

function safeScalar(PDO $db, string $sql, array $params = []) {
    $stmt = $db->prepare($sql);
    $stmt->execute($params);
    return $stmt->fetchColumn();
}

// ─────────────────────────────────────────────────────────────
// 1. لقطة اللحظة الحالية (كل ساعة)
// ─────────────────────────────────────────────────────────────
if (in_array($mode, ['hourly', 'daily', 'weekly'])) {
    echo "[Snapshot] Realtime stats...\n";

    $activeRides = (int)safeScalar($conRide, "SELECT COUNT(*) FROM ride WHERE status IN ('wait','started','arrived')");
    $onlineDrivers = (int)safeScalar($con, "SELECT COUNT(*) FROM car_locations WHERE status = 'on'");
    $revenueToday = (float)safeScalar($conRide, "SELECT IFNULL(SUM(price_for_passenger),0) FROM ride WHERE status='Finished' AND DATE(created_at)=CURDATE()");
    $revenueYesterday = (float)safeScalar($conRide, "SELECT IFNULL(SUM(price_for_passenger),0) FROM ride WHERE status='Finished' AND DATE(created_at)=DATE_SUB(CURDATE(), INTERVAL 1 DAY)");
    $openComplaints = (int)safeScalar($con, "SELECT COUNT(*) FROM complaint WHERE statusComplaint='Open'");
    $expiringLicenses = (int)safeScalar($con, "SELECT COUNT(*) FROM driver WHERE expiry_date BETWEEN CURDATE() AND DATE_ADD(CURDATE(), INTERVAL 15 DAY)");

    $hour = date('H');
    saveSnapshot("realtime_{$hour}.json", [
        'active_rides' => $activeRides,
        'online_drivers' => $onlineDrivers,
        'revenue_today' => $revenueToday,
        'revenue_yesterday' => $revenueYesterday,
        'open_complaints' => $openComplaints,
        'expiring_licenses' => $expiringLicenses,
    ], $todayDir);

    // ─── فجوة العرض والطلب (Supply-Demand Gap) ───
    echo "[Snapshot] Supply-Demand gap...\n";

    $GRID = 0.01;
    $demandRaw = safeQuery($conRide, "
        SELECT
            ROUND(SUBSTRING_INDEX(start_location,',',1) / $GRID) * $GRID AS lat,
            ROUND(SUBSTRING_INDEX(start_location,',',-1) / $GRID) * $GRID AS lng,
            COUNT(*) AS demand
        FROM ride
        WHERE created_at >= DATE_SUB(NOW(), INTERVAL 2 HOUR)
          AND start_location IS NOT NULL AND start_location != ''
        GROUP BY lat, lng
        HAVING demand >= 1
    ");

    $supplyRaw = safeQuery($con, "
        SELECT
            ROUND(latitude / $GRID) * $GRID AS lat,
            ROUND(longitude / $GRID) * $GRID AS lng,
            COUNT(*) AS supply
        FROM car_locations
        WHERE status = 'on'
          AND latitude != 0 AND longitude != 0
        GROUP BY lat, lng
    ");

    $supplyMap = [];
    foreach ($supplyRaw as $s) {
        $key = $s['lat'] . '_' . $s['lng'];
        $supplyMap[$key] = (int)$s['supply'];
    }

    $gapCells = [];
    foreach ($demandRaw as $d) {
        $key = $d['lat'] . '_' . $d['lng'];
        $supply = $supplyMap[$key] ?? 0;
        $demand = (int)$d['demand'];
        $gap = $demand - $supply;
        $gapCells[] = [
            'lat' => (float)$d['lat'],
            'lng' => (float)$d['lng'],
            'demand' => $demand,
            'supply' => $supply,
            'gap' => $gap,
            'ratio' => $supply > 0 ? round($demand / $supply, 2) : ($demand > 0 ? 99.0 : 0),
        ];
    }

    usort($gapCells, fn($a, $b) => $b['gap'] <=> $a['gap']);
    $gapCells = array_slice($gapCells, 0, 200);

    saveSnapshot("supply_demand_gap.json", [
        'cells' => $gapCells,
        'total_demand_cells' => count($demandRaw),
        'total_supply_cells' => count($supplyRaw),
    ], $todayDir);

    // ─── كاش الخريطة الحرارية من Redis ───
    echo "[Snapshot] Heatmap cache from Redis...\n";
    $heatmapRedis = $redis ? $redis->get('siro:cache:heatmap:data') : null;
    if ($heatmapRedis) {
        $heatmapData = json_decode($heatmapRedis, true);
        saveSnapshot("heatmap.json", $heatmapData ?: [], $todayDir);
    }

    // ─── كاش التسعير من Redis ───
    echo "[Snapshot] Pricing cache from Redis...\n";
    $pricingRedis = $redis ? $redis->get('siro:cache:pricing:grids') : null;
    if ($pricingRedis) {
        $pricingData = json_decode($pricingRedis, true);
        saveSnapshot("pricing_grids.json", $pricingData ?: [], $todayDir);
    }

    // ─── بيانات الكرون Predictive Demand من Redis ───
    $predictiveRedis = $redis ? $redis->get('siro:predictive_demand:latest') : null;
    if ($predictiveRedis) {
        saveSnapshot("predictive_demand.json", json_decode($predictiveRedis, true) ?: [], $todayDir);
    }
}

// ─────────────────────────────────────────────────────────────
// 2. لقطة يومية (تحليلات ثقيلة)
// ─────────────────────────────────────────────────────────────
if (in_array($mode, ['daily', 'weekly'])) {
    echo "[Snapshot] Daily analytics...\n";

    // ─── الإيرادات اليومية (30 يوم) ───
    $revenueDaily = safeQuery($conRide, "
        SELECT DATE(created_at) as date,
               SUM(price) as total_revenue,
               SUM(price - price_for_driver) as company_profit,
               COUNT(*) as total_rides,
               AVG(price) as avg_fare
        FROM ride
        WHERE status = 'Finished' AND created_at >= DATE_SUB(CURDATE(), INTERVAL 30 DAY)
        GROUP BY DATE(created_at)
        ORDER BY date ASC
    ");
    saveSnapshot("revenue_30d.json", ['daily' => $revenueDaily], $todayDir);

    // ─── النمو (ركاب + كباتن) ───
    $passengerGrowth = safeQuery($con, "
        SELECT DATE(created_at) as date, COUNT(*) as count
        FROM passengers
        WHERE created_at >= DATE_SUB(CURDATE(), INTERVAL 30 DAY)
        GROUP BY DATE(created_at) ORDER BY date ASC
    ");
    $driverGrowth = safeQuery($con, "
        SELECT DATE(created_at) as date, COUNT(*) as count
        FROM driver
        WHERE created_at >= DATE_SUB(CURDATE(), INTERVAL 30 DAY)
        GROUP BY DATE(created_at) ORDER BY date ASC
    ");
    $totalPassengers = (int)safeScalar($con, "SELECT COUNT(*) FROM passengers");
    $totalDrivers = (int)safeScalar($con, "SELECT COUNT(*) FROM driver");

    saveSnapshot("growth_30d.json", [
        'passengers' => $passengerGrowth,
        'drivers' => $driverGrowth,
        'totals' => ['passengers' => $totalPassengers, 'drivers' => $totalDrivers],
    ], $todayDir);

    // ─── توزيع الرحلات حسب الساعة (لاكتشاف الأنماط) ───
    $hourlyPattern = safeQuery($conRide, "
        SELECT HOUR(created_at) as hour, COUNT(*) as rides,
               AVG(price) as avg_price
        FROM ride
        WHERE status = 'Finished' AND created_at >= DATE_SUB(CURDATE(), INTERVAL 7 DAY)
        GROUP BY HOUR(created_at) ORDER BY hour
    ");
    saveSnapshot("hourly_pattern.json", ['hours' => $hourlyPattern], $todayDir);

    // ─── توزيع حالات الرحلات (Funnel) ───
    $rideFunnel = safeQuery($conRide, "
        SELECT status, COUNT(*) as count
        FROM ride
        WHERE created_at >= DATE_SUB(CURDATE(), INTERVAL 7 DAY)
        GROUP BY status
    ");
    saveSnapshot("ride_funnel.json", ['statuses' => $rideFunnel], $todayDir);

    // ─── أسعار المنافسين (تاريخي ٢٤ ساعة) ───
    $competitorHourly = safeQuery($con, "
        SELECT DATE_FORMAT(created_at,'%Y-%m-%d %H:00:00') AS hour_bucket,
               competitor_name,
               AVG(price_per_km) AS avg_price,
               COUNT(*) AS samples
        FROM scraped_competitor_prices
        WHERE created_at >= DATE_SUB(NOW(), INTERVAL 24 HOUR)
        GROUP BY hour_bucket, competitor_name
        ORDER BY hour_bucket ASC
    ");
    saveSnapshot("competitor_prices_24h.json", ['hourly' => $competitorHourly], $todayDir);

    // ─── صحة السوق (market health) ───
    $countries = ['JO', 'SY', 'EG', 'IQ'];
    $marketHealth = [];
    foreach ($countries as $cc) {
        $rows = safeQuery($con, "
            SELECT report_date, average_pci, market_share_percent, total_anomalies
            FROM market_health_reports
            WHERE country_code = :cc
            ORDER BY report_date DESC LIMIT 12
        ", [':cc' => $cc]);
        if (!empty($rows)) {
            $marketHealth[$cc] = array_reverse($rows);
        }
    }
    saveSnapshot("market_health.json", ['countries' => $marketHealth], $todayDir);

    // ─── شكاوى مفتوحة ───
    $complaints = safeQuery($con, "
        SELECT complaint_type, COUNT(*) as count
        FROM complaint
        WHERE statusComplaint = 'Open'
        GROUP BY complaint_type
        ORDER BY count DESC
    ");
    saveSnapshot("complaints_open.json", ['by_type' => $complaints], $todayDir);
}

// ─────────────────────────────────────────────────────────────
// 3. لقطة أسبوعية (مقارنات وتجميعات)
// ─────────────────────────────────────────────────────────────
if ($mode === 'weekly') {
    echo "[Snapshot] Weekly deep analytics...\n";

    // ─── مقارنة أسبوع بأسبوع ───
    $weeklyComparison = safeQuery($conRide, "
        SELECT
            YEARWEEK(created_at, 1) as yw,
            MIN(DATE(created_at)) as week_start,
            COUNT(*) as rides,
            SUM(price) as revenue,
            SUM(price - price_for_driver) as profit,
            COUNT(DISTINCT driver_id) as active_drivers,
            COUNT(DISTINCT passenger_id) as active_passengers
        FROM ride
        WHERE status = 'Finished' AND created_at >= DATE_SUB(CURDATE(), INTERVAL 12 WEEK)
        GROUP BY yw ORDER BY yw ASC
    ");
    saveSnapshot("weekly_comparison.json", ['weeks' => $weeklyComparison], $todayDir);

    // ─── أعلى مناطق (أكثر 20 خلية نشاطاً) ───
    $topZones = safeQuery($conRide, "
        SELECT
            ROUND(SUBSTRING_INDEX(start_location,',',1) / 0.01) * 0.01 AS lat,
            ROUND(SUBSTRING_INDEX(start_location,',',-1) / 0.01) * 0.01 AS lng,
            COUNT(*) AS rides,
            AVG(price) AS avg_price
        FROM ride
        WHERE status = 'Finished'
          AND created_at >= DATE_SUB(CURDATE(), INTERVAL 4 WEEK)
          AND start_location IS NOT NULL AND start_location != ''
        GROUP BY lat, lng
        ORDER BY rides DESC
        LIMIT 20
    ");
    saveSnapshot("top_zones.json", ['zones' => $topZones], $todayDir);

    // ─── احتفاظ الركاب (Retention) ───
    $retention = safeQuery($conRide, "
        SELECT
            weeks_since_signup,
            COUNT(DISTINCT passenger_id) as active_passengers
        FROM (
            SELECT r.passenger_id,
                   FLOOR(DATEDIFF(r.created_at, p.created_at) / 7) as weeks_since_signup
            FROM ride r
            JOIN passengers p ON r.passenger_id = p.id
            WHERE r.status = 'Finished'
              AND r.created_at >= DATE_SUB(CURDATE(), INTERVAL 12 WEEK)
        ) sub
        GROUP BY weeks_since_signup
        ORDER BY weeks_since_signup
    ");
    saveSnapshot("retention_cohort.json", ['cohorts' => $retention], $todayDir);
}

// ─────────────────────────────────────────────────────────────
// 4. إنشاء manifest يسهّل على الداشبورد معرفة الملفات المتاحة
// ─────────────────────────────────────────────────────────────
$files = glob("$todayDir/*.json");
$manifest = [];
foreach ($files as $f) {
    $name = basename($f, '.json');
    if ($name === 'manifest') continue;
    $manifest[$name] = [
        'file' => basename($f),
        'size' => filesize($f),
        'updated' => date('Y-m-d H:i:s', filemtime($f)),
    ];
}
saveSnapshot("manifest.json", ['snapshots' => $manifest, 'date' => $today], $todayDir);

// ─── فهرس الأيام المتاحة (لتسهيل التصفح التاريخي) ───
$days = array_map('basename', glob("$cacheBase/20*", GLOB_ONLYDIR));
rsort($days);
file_put_contents("$cacheBase/index.json", json_encode([
    'available_dates' => $days,
    'latest' => $days[0] ?? $today,
    'updated' => $now,
], JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT));

echo "[DashboardSnapshot] Done! Files in $todayDir\n";