<?php

namespace app\api\controller;

use think\Db;

/**
 * 后台管理端 · 订单管理（Module-ADM-ORDER）
 * 路由：
 *   GET  /api/v1/admin/orders             AO1 订单列表
 *   POST /api/v1/admin/order/:id/refund   AO2 订单退款
 *   POST /api/v1/admin/order/supplement   AO3 订单补单
 */
class AdminOrder extends V1
{
    /** 管理端接口必须校验管理员身份（V1 默认关闭了 URI 权限校验） */
    public function _initialize()
    {
        parent::_initialize();
        $this->adminOnly();
    }

    /**
     * AO1 订单列表
     * GET /api/v1/admin/orders 入参 {type?,page,size}
     * → 分页 {list:[{id,orderNo,type,title,amount,payType,status,userId,userName,createdAt}],page,size,total,hasMore}
     */
    public function index()
    {
        $type = trim((string)$this->input('type', ''));

        // 闭包重建查询：TP5.0 的 count() 会清空 Query::options，不能复用同一对象
        list($rows, $total, $page, $size) = $this->pageQuery(function ($forCount) use ($type) {
            $q = Db::name('fc_order')->alias('o')
                ->join('user u', 'u.id = o.user_id', 'LEFT');
            if ($type !== '') {
                $q->where('o.type', $type);
            }
            if ($forCount) {
                return $q;
            }
            return $q->field('o.*, u.nickname AS nickname')
                ->order('o.createtime desc');
        });

        $list = [];
        foreach ($rows as $row) {
            $list[] = [
                'id'        => (int)$row['id'],
                'orderNo'   => (string)$row['order_no'],
                'type'      => (string)$row['type'],
                'title'     => (string)$row['title'],
                'amount'    => (float)$row['amount'],
                'payType'   => (string)$row['pay_type'],
                'status'    => (string)$row['status'],
                'userId'    => (int)$row['user_id'],
                'userName'  => (string)$row['nickname'],
                'createdAt' => $this->iso($row['createtime']),
            ];
        }

        $this->ok($this->paginate($list, $total, $page, $size));
    }

    /**
     * AO2 订单退款
     * POST /api/v1/admin/order/:id/refund 入参 {amount,reason?} → {id,refunded}
     * 规则 BR-10：退款金额需大于 0
     */
    public function refund()
    {
        $id = (int)$this->request->param('id', 0);
        $amount = $this->input('amount', null);
        $reason = trim((string)$this->input('reason', ''));
        $amount = ($amount === null || $amount === '') ? null : (float)$amount;

        try {
            $res = \app\common\library\OrderRefund::refund($id, $amount, $reason);
        } catch (\Throwable $e) {
            $this->fail($e->getMessage());
        }

        $this->adminLog('订单退款 #' . $id . ' 金额' . $res['amount'] . ' 退款单号' . $res['refundNo']);

        $this->ok([
            'id'       => $id,
            'refunded' => true,
            'refundNo' => $res['refundNo'],
            'amount'   => $res['amount'],
        ]);
    }

    /**
     * AO3 订单补单
     * POST /api/v1/admin/order/supplement 入参 {orderNo} → {orderNo,supplemented}
     * 幂等：已支付直接返回
     */
    public function supplement()
    {
        $orderNo = trim((string)$this->input('orderNo', ''));
        if ($orderNo === '') {
            $this->fail('订单号不能为空');
        }

        $order = Db::name('fc_order')->where('order_no', $orderNo)->find();
        if (!$order) {
            $this->fail('订单不存在', 404);
        }

        if ((string)$order['status'] === 'paid') {
            $this->ok(['orderNo' => (string)$orderNo, 'supplemented' => false], '订单已支付，无需补单');
        }
        if ((string)$order['status'] !== 'pending') {
            $this->fail('订单状态不支持补单（当前：' . $order['status'] . '）');
        }

        $now = time();
        $handled = false;
        try {
            Db::transaction(function () use ($order, $now, &$handled) {
                $locked = Db::name('fc_order')->where('id', (int)$order['id'])->lock(true)->find();
                if (!$locked || (string)$locked['status'] !== 'pending') {
                    return;
                }

                $affected = Db::name('fc_order')
                    ->where('id', (int)$order['id'])
                    ->where('status', 'pending')
                    ->update(['status' => 'paid', 'paytime' => $now, 'updatetime' => $now]);
                if (!$affected) {
                    return;
                }

                $locked['status']  = 'paid';
                $locked['paytime'] = $now;
                $handled = true;

                // 补单必须真正发货：会员发放 / 余额入账 / 付费查看解锁，不能只改状态
                \app\common\library\OrderFulfill::handle($locked);
            });
        } catch (\Throwable $e) {
            \think\Log::record('补单失败：订单 ' . $orderNo . '，' . $e->getMessage(), 'error');
            $this->fail('补单失败：' . $e->getMessage());
        }

        $this->adminLog('订单补单 #' . $orderNo . ($handled ? '' : '（幂等命中）'));

        $this->ok(['orderNo' => (string)$orderNo, 'supplemented' => $handled]);
    }
}