<?php
/**
 * 渠道新增计划列表接口  GET /api/channel/plan_list.php
 * v1.0.18 渠道管理 - 渠道新增计划
 * 参数：page / limit / channel_type / status / keyword
 * 返回：{ list, total, page, limit }（list 含 remaining_days 剩余天数）
 */
require_once __DIR__ . '/../common/db.php';
require_once __DIR__ . '/../common/response.php';
require_once __DIR__ . '/../common/auth.php';

checkPermission('channel');

[$page, $limit] = pageParams();
$channelType = trim($_REQUEST['channel_type'] ?? '');
$status      = trim($_REQUEST['status'] ?? '');
$keyword     = trim($_REQUEST['keyword'] ?? '');

$where  = ['is_active = 1'];
$params = [];
if ($channelType !== '') {
    $where[] = 'channel_type = ?';
    $params[] = $channelType;
}
if ($status !== '') {
    $where[] = 'status = ?';
    $params[] = $status;
}
if ($keyword !== '') {
    $where[] = '(source_detail LIKE ? OR industry LIKE ? OR remark LIKE ?)';
    $like = "%$keyword%";
    array_push($params, $like, $like, $like);
}
$whereSql = implode(' AND ', $where);

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

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

$offset = ($page - 1) * $limit;
$stmt = $pdo->prepare(
    "SELECT id, channel_type, source_detail, industry, start_date, end_date, remark, status, created_at, updated_at
     FROM channel_plans
     WHERE $whereSql
     ORDER BY id DESC
     LIMIT $limit OFFSET $offset"
);
$stmt->execute($params);
$list = $stmt->fetchAll();

// 剩余天数：距时间窗口结束日（end_date）的天数，已过期为 0
$today = strtotime(date('Y-m-d'));
foreach ($list as &$row) {
    $row['remaining_days'] = 0;
    if (!empty($row['end_date']) && strtotime($row['end_date']) !== false) {
        $diff = (int)ceil((strtotime($row['end_date']) - $today) / 86400);
        $row['remaining_days'] = max(0, $diff);
    }
}
unset($row);

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