<?php
// ============================================================
// ride/location/save_driver_destination.php
// API Endpoint for Captains to set their destination (max 2 times daily)
// ============================================================

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

// 1. Authorize Driver
if ($role !== 'driver') {
    http_response_code(403);
    echo json_encode(['status' => 'failure', 'message' => 'Unauthorized. Driver role required.']);
    exit;
}

// 2. Filter Inputs
$action   = filterRequest('action') ?? 'set';
$destLat  = filterRequest('destination_lat') ?? filterRequest('target_latitude');
$destLng  = filterRequest('destination_lng') ?? filterRequest('target_longitude');
$destName = filterRequest('destination_name') ?? 'Destination';

try {
    if ($action === 'get') {
        $stmtGet = $con->prepare("
            SELECT target_latitude, target_longitude, destination_name, created_at 
            FROM driver_destinations 
            WHERE driver_id = :did 
            AND is_active = 1 
            LIMIT 1
        ");
        $stmtGet->execute([':did' => $user_id]);
        $activeDest = $stmtGet->fetch(PDO::FETCH_ASSOC);

        if ($activeDest) {
            jsonSuccess($activeDest, "Active destination retrieved.");
        } else {
            jsonSuccess(null, "No active destination set.");
        }
        exit;
    }

    if ($action === 'clear') {
        $stmtDeactivate = $con->prepare("
            UPDATE driver_destinations 
            SET is_active = 0 
            WHERE driver_id = :did 
            AND is_active = 1
        ");
        $stmtDeactivate->execute([':did' => $user_id]);
        jsonSuccess(null, "تم إلغاء تفعيل الوجهة الشخصية بنجاح.");
        exit;
    }

    // Default action: set
    if (empty($destLat) || empty($destLng)) {
        jsonError("Missing required parameters: destination_lat and destination_lng are required.");
    }

    // 3. Enforce Limit: Max 2 times daily
    $stmtCount = $con->prepare("
        SELECT COUNT(*) 
        FROM driver_destinations 
        WHERE driver_id = :did 
        AND usage_date = CURDATE() 
        AND is_active = 1
    ");
    $stmtCount->execute([':did' => $user_id]);
    $dailyCount = intval($stmtCount->fetchColumn());

    if ($dailyCount >= 2) {
        jsonError("حسناً كابتن، لقد وصلت للحد الأقصى المسموح به لتحديد الوجهة اليوم (مرتان في اليوم).");
    }

    // 4. Deactivate previous active destinations for this driver
    $stmtDeactivate = $con->prepare("
        UPDATE driver_destinations 
        SET is_active = 0 
        WHERE driver_id = :did 
        AND is_active = 1
    ");
    $stmtDeactivate->execute([':did' => $user_id]);

    // 5. Insert new destination
    $stmtInsert = $con->prepare("
        INSERT INTO driver_destinations 
        (driver_id, target_latitude, target_longitude, destination_name, is_active, usage_date) 
        VALUES (:did, :lat, :lng, :name, 1, CURDATE())
    ");
    $stmtInsert->execute([
        ':did' => $user_id,
        ':lat' => (float)$destLat,
        ':lng' => (float)$destLng,
        ':name' => $destName
    ]);

    jsonSuccess(null, "تم حفظ وجهتك كابتن بنجاح! سيتم توجيه الطلبات المطابقة لوجهتك.");

} catch (Exception $e) {
    error_log("[save_driver_destination.php] Error: " . $e->getMessage());
    jsonError("Failed to save driver destination: " . $e->getMessage());
}