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

$driver_id = filterRequest("driver_id");
if (empty($driver_id)) {
    jsonError("Missing driver_id");
    exit;
}

global $redis;
$redisKey = "driver_streak:{$driver_id}";

// 1. Try to read from Redis first (Cache-Aside pattern)
if (isset($redis)) {
    try {
        $cached = $redis->get($redisKey);
        if ($cached) {
            $data = json_decode($cached, true);
            if ($data) {
                // Return immediately if found in cache!
                jsonSuccess($data);
                exit;
            }
        }
    } catch (Exception $e) {
        error_log("Redis read error in get_streak: " . $e->getMessage());
    }
}

// 2. Fallback to Database if not found in Redis
$stmt = $con->prepare("SELECT current_streak, zero_commission_until FROM driver_streaks WHERE driver_id = ?");
$stmt->execute([$driver_id]);
$streak = $stmt->fetch(PDO::FETCH_ASSOC);

if ($streak) {
    $now = new DateTime();
    $until = new DateTime($streak['zero_commission_until']);
    
    $isActive = false;
    if ($streak['zero_commission_until'] !== '2000-01-01 00:00:00' && $now < $until) {
        $isActive = true;
    }
    
    $responseData = [
        'streak_count' => intval($streak['current_streak']),
        'is_zero_commission_active' => $isActive,
        'zero_commission_until' => $streak['zero_commission_until']
    ];
} else {
    // Default if no record yet
    $responseData = [
        'streak_count' => 0,
        'is_zero_commission_active' => false,
        'zero_commission_until' => '2000-01-01 00:00:00'
    ];
}

// 3. Save the DB result into Redis for future reads
if (isset($redis)) {
    try {
        // Cache it for 2 hours (7200 seconds)
        $redis->setex($redisKey, 7200, json_encode($responseData));
    } catch (Exception $e) {
        error_log("Redis write error in get_streak: " . $e->getMessage());
    }
}

jsonSuccess($responseData);
?>