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

if (function_exists('requireAuthentication')) requireAuthentication();

$input = json_decode(file_get_contents('php://input'), true) ?: $_POST;
$conversationId = isset($input['conversation_id']) ? intval($input['conversation_id']) : null;
$userId = isset($input['user_id']) ? intval($input['user_id']) : null;

if (!$conversationId && !$userId) {
    http_response_code(400);
    echo json_encode(['success' => false, 'error' => 'conversation_id or user_id required']);
    exit;
}

try {
    $db = Database::getInstance();
    if ($conversationId) {
        $db->execute('DELETE FROM conversations WHERE id = ?', [$conversationId]);
    }
    if ($userId) {
        $db->execute('DELETE FROM conversations WHERE user_id = ?', [$userId]);
    }
    echo json_encode(['success' => true]);
} catch (Exception $e) {
    http_response_code(500);
    echo json_encode(['success' => false, 'error' => $e->getMessage()]);
}
