<?php
/**
 * 需求转盘列表接口  GET/POST /api/need/list.php
 * 参数：page / limit / keyword / start_date / end_date / company_name / industry / need_category / is_valid
 */
require_once __DIR__ . '/../common/db.php';
require_once __DIR__ . '/../common/response.php';
require_once __DIR__ . '/../common/auth.php';

checkPermission('need');

[$page, $limit] = pageParams();
$keyword   = trim($_REQUEST['keyword'] ?? '');
$startDate = trim($_REQUEST['start_date'] ?? '');
$endDate   = trim($_REQUEST['end_date'] ?? '');
$companyName = trim($_REQUEST['company_name'] ?? '');
$industry  = trim($_REQUEST['industry'] ?? '');
$category  = trim($_REQUEST['need_category'] ?? '');
$valid     = isset($_REQUEST['is_valid']) && $_REQUEST['is_valid'] !== '' ? (int)$_REQUEST['is_valid'] : null;

$where  = ['cn.is_valid = 1'];
$params = [];
if ($valid !== null) {
    $where = ['cn.is_valid = ?'];
    $params = [$valid];
}
if ($keyword !== '') {
    $where[] = '(cn.description LIKE ? OR cn.contact_person LIKE ? OR c.display_name LIKE ?)';
    $like = "%$keyword%";
    array_push($params, $like, $like, $like);
}
if ($startDate !== '') { $where[] = 'DATE(cn.created_at) >= ?'; $params[] = $startDate; }
if ($endDate !== '') { $where[] = 'DATE(cn.created_at) <= ?'; $params[] = $endDate; }
if ($companyName !== '') { $where[] = 'c.display_name LIKE ?'; $params[] = "%$companyName%"; }
if ($industry !== '') { $where[] = 'c.industry = ?'; $params[] = $industry; }
if ($category !== '') { $where[] = 'cn.need_category = ?'; $params[] = $category; }
$whereSql = implode(' AND ', $where);

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

$stmt = $pdo->prepare(
    "SELECT COUNT(*) FROM company_needs cn LEFT JOIN companies c ON c.id = cn.company_id WHERE $whereSql"
);
$stmt->execute($params);
$total = (int)$stmt->fetchColumn();

$offset = ($page - 1) * $limit;
$stmt = $pdo->prepare(
    "SELECT cn.id, cn.company_id, c.display_name, c.industry, cn.contact_person,
            cn.need_category, cn.target_product_category, cn.application_scenario,
            cn.description, cn.is_valid, cn.created_at
     FROM company_needs cn
     LEFT JOIN companies c ON c.id = cn.company_id
     WHERE $whereSql
     ORDER BY cn.id DESC
     LIMIT $limit OFFSET $offset"
);
$stmt->execute($params);
$list = $stmt->fetchAll();

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