<?php
require_once '../config.php';
header('Content-Type: application/json; charset=utf-8');

try {
    // Auto-create table
    $pdo->exec("CREATE TABLE IF NOT EXISTS `monthly_locks` (
      `year` int(4) NOT NULL,
      `month` int(2) NOT NULL,
      `is_locked` tinyint(1) NOT NULL DEFAULT '0',
      PRIMARY KEY (`year`,`month`)
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;");

    $method = $_SERVER['REQUEST_METHOD'];

    if ($method === 'GET') {
        $year = isset($_GET['year']) ? intval($_GET['year']) : date('Y');
        $month = isset($_GET['month']) ? intval($_GET['month']) : date('n');

        $stmt = $pdo->prepare("SELECT is_locked FROM monthly_locks WHERE year = ? AND month = ?");
        $stmt->execute([$year, $month]);
        $row = $stmt->fetch();
        
        echo json_encode([
            'status' => 'success',
            'is_locked' => $row ? (bool)$row['is_locked'] : false
        ]);
        exit;
    }

    if ($method === 'POST') {
        $data = json_decode(file_get_contents('php://input'), true);
        $year = intval($data['year']);
        $month = intval($data['month']);
        $is_locked = empty($data['is_locked']) ? 0 : 1;

        $stmt = $pdo->prepare("INSERT INTO monthly_locks (year, month, is_locked) VALUES (?, ?, ?) ON DUPLICATE KEY UPDATE is_locked = VALUES(is_locked)");
        $stmt->execute([$year, $month, $is_locked]);

        echo json_encode([
            'status' => 'success',
            'is_locked' => (bool)$is_locked
        ]);
        exit;
    }
} catch (Exception $e) {
    echo json_encode([
        'status' => 'error',
        'message' => $e->getMessage()
    ]);
}