<?php
/**
 * 操作日志查询接口  GET/POST /api/system/log_list.php
 * 仅超级管理员可见，默认查询近1个月
 * 参数：page / limit / keyword / action / module / username / start_date / end_date
 */
require_once __DIR__ . '/../common/Api.php';
$pdo = Api::boot(['super' => true]);


[$page, $limit] = pageParams();
$keyword  = trim($_REQUEST['keyword'] ?? '');
$action   = trim($_REQUEST['action'] ?? '');
$module   = trim($_REQUEST['module'] ?? '');
$username = trim($_REQUEST['username'] ?? '');
$startDate = trim($_REQUEST['start_date'] ?? '');
$endDate   = trim($_REQUEST['end_date'] ?? '');

$where  = ['created_at >= DATE_SUB(NOW(), INTERVAL 1 MONTH)'];
$params = [];
if ($keyword !== '') {
    $where[] = '(username LIKE ? OR content LIKE ? OR module LIKE ?)';
    $like = "%$keyword%";
    array_push($params, $like, $like, $like);
}
if ($action !== '') { $where[] = 'action = ?'; $params[] = $action; }
if ($module !== '') { $where[] = 'module = ?'; $params[] = $module; }
if ($username !== '') { $where[] = 'username = ?'; $params[] = $username; }
if ($startDate !== '') { $where[] = 'DATE(created_at) >= ?'; $params[] = $startDate; }
if ($endDate !== '') { $where[] = 'DATE(created_at) <= ?'; $params[] = $endDate; }
$whereSql = implode(' AND ', $where);

$pdo = DB::getInstance()->getPdo();

$stmt = $pdo->prepare("SELECT COUNT(*) FROM system_logs WHERE $whereSql");
$stmt->execute($params);
$total = (int)$stmt->fetchColumn();

$offset = ($page - 1) * $limit;
$stmt = $pdo->prepare(
    "SELECT id, user_id, username, action, module, target_table, target_id, content, ip, created_at
     FROM system_logs
     WHERE $whereSql
     ORDER BY id DESC
     LIMIT $limit OFFSET $offset"
);
$stmt->execute($params);
$list = $stmt->fetchAll();

// 筛选下拉字典
$dict = [
    'actions' => $pdo->query("SELECT DISTINCT action FROM system_logs ORDER BY action")->fetchAll(PDO::FETCH_COLUMN),
    'modules' => $pdo->query("SELECT DISTINCT module FROM system_logs ORDER BY module")->fetchAll(PDO::FETCH_COLUMN),
];

Response::success(['list' => $list, 'total' => $total, 'page' => $page, 'limit' => $limit, 'dict' => $dict]);