<?php
require_once __DIR__ . '/../../connect.php';

if ($role !== 'admin' && $role !== 'super_admin') {
    http_response_code(403);
    echo json_encode(['status' => 'failure', 'message' => 'Unauthorized access.']);
    exit;
}

try {
    $countryCode = filterRequest('country_code');

    // 1. Hourly competitor price averages (last 24h)
    $compSql = "SELECT
                    DATE_FORMAT(created_at, '%Y-%m-%d %H:00:00') AS hour_bucket,
                    AVG(price_per_km) AS avg_price_per_km,
                    COUNT(*) AS sample_count
                FROM competitor_prices
                WHERE created_at >= DATE_SUB(NOW(), INTERVAL 24 HOUR)";
    $compParams = [];
    if ($countryCode) {
        $compSql .= " AND country_code = :country";
        $compParams[':country'] = strtoupper($countryCode);
    }
    $compSql .= " GROUP BY hour_bucket ORDER BY hour_bucket ASC LIMIT 24";

    $stmt = $con->prepare($compSql);
    foreach ($compParams as $k => $v) {
        $stmt->bindValue($k, $v);
    }
    $stmt->execute();
    $hourlyData = $stmt->fetchAll(PDO::FETCH_ASSOC);

    // 2. PCI by region — group competitor prices by ~0.02° grid cells
    $pciSql = "SELECT
                    ROUND(from_latitude * 50, 0) / 50 AS lat_group,
                    ROUND(from_longitude * 50, 0) / 50 AS lng_group,
                    competitor_name,
                    AVG(price_per_km) AS avg_price_per_km,
                    COUNT(*) AS samples
               FROM competitor_prices
               WHERE created_at >= DATE_SUB(NOW(), INTERVAL 7 DAY)";
    $pciParams = [];
    if ($countryCode) {
        $pciSql .= " AND country_code = :country2";
        $pciParams[':country2'] = strtoupper($countryCode);
    }
    $pciSql .= " GROUP BY lat_group, lng_group, competitor_name
                 ORDER BY samples DESC LIMIT 20";

    $stmtPci = $con->prepare($pciSql);
    foreach ($pciParams as $k => $v) {
        $stmtPci->bindValue($k, $v);
    }
    $stmtPci->execute();
    $pciData = $stmtPci->fetchAll(PDO::FETCH_ASSOC);

    // 3. Siro base prices by category (from kazan table)
    $siroSql = "SELECT speedPrice, comfortPrice, awfarPrice, ladyPrice, electricPrice, vanPrice
                FROM kazan WHERE country = :country3 LIMIT 1";
    $countryNameMap = ['SY' => 'Syria', 'JO' => 'Jordan', 'EG' => 'Egypt', 'IQ' => 'Iraq'];
    $siroCountry = $countryNameMap[strtoupper($countryCode ?: 'SY')] ?? 'Syria';

    $stmtSiro = $con->prepare($siroSql);
    $stmtSiro->execute([':country3' => $siroCountry]);
    $siroPrices = $stmtSiro->fetch(PDO::FETCH_ASSOC);

    jsonSuccess([
        'hourly_competitor_prices' => $hourlyData,
        'pci_regions' => $pciData,
        'siro_base_prices' => $siroPrices ?: [],
    ]);

} catch (Exception $e) {
    error_log("[get_price_comparison.php] Error: " . $e->getMessage());
    jsonError("Failed to fetch price comparison: " . $e->getMessage());
}