<?php
require 'db.php';

$data = json_decode(file_get_contents('php://input'), true);

$type = $data['type'] ?? '';
$id   = intval($data['id'] ?? 0);

if ($id <= 0 || ($type !== 'task' && $type !== 'subtask')) {
    echo json_encode(['success' => false, 'error' => 'Invalid request']);
    exit;
}

if ($type === 'task') {
    $stmt = $pdo->prepare("UPDATE tasks SET highlighted = (highlighted + 1) % 3 WHERE id = ?");
    $stmt->execute([$id]);

    $stmt = $pdo->prepare("SELECT highlighted FROM tasks WHERE id = ?");
    $stmt->execute([$id]);
    $newState = intval($stmt->fetchColumn());
} else {
    $stmt = $pdo->prepare("UPDATE subtasks SET highlighted = (highlighted + 1) % 3 WHERE id = ?");
    $stmt->execute([$id]);

    $stmt = $pdo->prepare("SELECT highlighted FROM subtasks WHERE id = ?");
    $stmt->execute([$id]);
    $newState = intval($stmt->fetchColumn());
}

echo json_encode(['success' => true, 'highlighted' => $newState]);