<?php
session_start();
header('Content-Type: application/json');
include 'Connection.php';

// Pastikan user sudah login
if (!isset($_SESSION['username'])) {
    echo json_encode(["status" => "error", "message" => "Belum login"]);
    exit;
}

$username = $_SESSION['username'];
$score = intval($_POST['score'] ?? 0);

// Validasi score
if ($score <= 0) {
    echo json_encode(["status" => "error", "message" => "Skor tidak valid"]);
    exit;
}

// Validasi score maksimal (opsional, sesuaikan dengan game Anda)
if ($score > 999999) {
    echo json_encode(["status" => "error", "message" => "Skor terlalu tinggi"]);
    exit;
}

// Cek apakah user sudah punya record
$checkStmt = $conn->prepare("SELECT score FROM leaderboard WHERE username = ?");
$checkStmt->bind_param("s", $username);
$checkStmt->execute();
$result = $checkStmt->get_result();

if ($result->num_rows > 0) {
    // User sudah ada, cek apakah score baru lebih tinggi
    $row = $result->fetch_assoc();
    $oldScore = $row['score'];
    
    if ($score > $oldScore) {
        // Update dengan score yang lebih tinggi
        $updateStmt = $conn->prepare("UPDATE leaderboard SET score = ? WHERE username = ?");
        $updateStmt->bind_param("is", $score, $username);
        
        if ($updateStmt->execute()) {
            echo json_encode([
                "status" => "success", 
                "message" => "Skor berhasil diperbarui!",
                "newHighScore" => true,
                "score" => $score
            ]);
        } else {
            echo json_encode(["status" => "error", "message" => "Gagal memperbarui skor"]);
        }
        $updateStmt->close();
    } else {
        // Score baru lebih rendah, tidak perlu update
        echo json_encode([
            "status" => "success", 
            "message" => "Skor tidak diperbarui (skor lama lebih tinggi)",
            "newHighScore" => false,
            "currentHighScore" => $oldScore
        ]);
    }
} else {
    // User belum ada, insert baru
    $insertStmt = $conn->prepare("INSERT INTO leaderboard (username, score) VALUES (?, ?)");
    $insertStmt->bind_param("si", $username, $score);
    
    if ($insertStmt->execute()) {
        echo json_encode([
            "status" => "success", 
            "message" => "Skor berhasil disimpan!",
            "newHighScore" => true,
            "score" => $score
        ]);
    } else {
        echo json_encode(["status" => "error", "message" => "Gagal menyimpan skor"]);
    }
    $insertStmt->close();
}

$checkStmt->close();
$conn->close();
?>