<?php
// ============================================================
// get_pricing_stability_log.php
// شاشة مراجعة محرك الثبات (Shadow Mode) — يعرض سجل التصنيفات
// والإجراءات المقترحة بدون ما يكون أي منها مطبّق فعلياً على kazan
// ============================================================

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

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

try {
    $countryCode = filterRequest('country_code');
    $limit = filterRequest('limit', 'int') ?? 100;

    $sql = "SELECT * FROM pricing_stability_log";
    $params = [];

    if ($countryCode) {
        $sql .= " WHERE country_code = :country";
        $params[':country'] = strtoupper($countryCode);
    }

    $sql .= " ORDER BY evaluated_at DESC LIMIT :limit";

    $stmt = $con->prepare($sql);
    $stmt->bindValue(':limit', $limit, PDO::PARAM_INT);
    foreach ($params as $key => $val) {
        $stmt->bindValue($key, $val);
    }
    $stmt->execute();
    $log = $stmt->fetchAll(PDO::FETCH_ASSOC);

    // ملخص سريع لآخر تصنيف لكل دولة
    $stmtLatest = $con->query("
        SELECT l1.* FROM pricing_stability_log l1
        INNER JOIN (
            SELECT country_code, MAX(evaluated_at) AS max_time
            FROM pricing_stability_log
            GROUP BY country_code
        ) l2 ON l1.country_code = l2.country_code AND l1.evaluated_at = l2.max_time
    ");
    $latestPerCountry = $stmtLatest->fetchAll(PDO::FETCH_ASSOC);

    jsonSuccess([
        'log' => $log,
        'latest_per_country' => $latestPerCountry,
    ]);

} catch (Exception $e) {
    error_log("[get_pricing_stability_log.php] Error: " . $e->getMessage());
    jsonError("Failed to fetch pricing stability log: " . $e->getMessage());
}