<?php

namespace app\admin\controller;

use app\common\controller\Backend;
use think\Db;
use think\exception\PDOException;

/**
 * 结算单管理
 *
 * 结算单由订单核销完工自动生成，后台负责对账审计及异常挂起单的人工结算归档
 *
 * @icon fa fa-calculator
 */
class Settle extends Backend
{
    /**
     * Settle模型对象
     * @var \app\admin\model\Settle
     */
    protected $model = null;

    protected $relationSearch = true;
    protected $searchFields = 'id,order.order_no,master.realname,master.mobile';

    public function _initialize()
    {
        parent::_initialize();
        $this->model = new \app\admin\model\Settle;
        $this->view->assign("statusList", $this->model->getStatusList());
    }

    /**
     * 结算单列表
     */
    public function index()
    {
        $this->request->filter(['strip_tags', 'trim']);
        if (false === $this->request->isAjax()) {
            return $this->view->fetch();
        }
        if ($this->request->request('keyField')) {
            return $this->selectpage();
        }
        [$where, $sort, $order, $offset, $limit] = $this->buildparams();
        $list = $this->model
            ->with(['order', 'master'])
            ->where($where)
            ->order($sort, $order)
            ->paginate($limit);
        $result = ['total' => $list->total(), 'rows' => $list->items()];
        return json($result);
    }

    /**
     * 结算对账详情（关联订单费用明细、师傅钱包快照与入账流水）
     */
    public function detail($ids = null)
    {
        $row = $this->model->get($ids);
        if (!$row) {
            $this->error(__('No Results were found'));
        }
        $this->assignSettleContext($row);
        return $this->view->fetch();
    }

    /**
     * 待结算单财务处理（严禁篡改结算金额，仅允许对 wait 状态执行线上入账或线下归档）
     */
    public function edit($ids = null)
    {
        $row = $this->model->get($ids);
        if (!$row) {
            $this->error(__('No Results were found'));
        }
        if (false === $this->request->isPost()) {
            $this->assignSettleContext($row);
            return $this->view->fetch();
        }

        if ($row['status'] !== 'wait') {
            $this->error('该结算单已归档完结，禁止重复结算或修改账务数据');
        }

        $targetStatus = (string)$this->request->post('row.status', '');
        if (!in_array($targetStatus, ['settled', 'offline'], true)) {
            $this->error('请选择有效的结算归档方式（线上划拨入账 / 线下特殊结算）');
        }

        $masterId     = (int)$row['master_id'];
        $orderId      = (int)$row['order_id'];
        $settleAmount = round((float)$row['settle_amount'], 2);
        $now          = time();

        Db::startTrans();
        try {
            // 乐观锁防并发重复点击结算
            $affected = Db::name('settle')
                ->where('id', (int)$row['id'])
                ->where('status', 'wait')
                ->update([
                    'status'      => $targetStatus,
                    'settle_time' => $now,
                ]);
            if (!$affected) {
                throw new \Exception('结算单状态已变更，请刷新列表后重试');
            }

            $master = Db::name('master')->where('id', $masterId)->lock(true)->find();
            if (!$master) {
                throw new \Exception('关联结算师傅不存在');
            }
            $orderNo = $orderId > 0 ? (string)Db::name('order')->where('id', $orderId)->value('order_no') : '';

            if ($targetStatus === 'settled') {
                // 幂等校验：防止该订单此前已产生过 settle 流水
                $existsLog = $orderId > 0 && Db::name('wallet_log')
                    ->where('user_type', 'master')
                    ->where('user_id', $masterId)
                    ->where('order_id', $orderId)
                    ->where('type', 'settle')
                    ->find();
                if ($existsLog) {
                    throw new \Exception('检测到该订单已存在线上结算入账流水，请核对后再操作');
                }

                $newMoney = round((float)$master['money'] + $settleAmount, 2);
                Db::name('master')->where('id', $masterId)->update([
                    'money'      => $newMoney,
                    'updatetime' => $now,
                ]);
                Db::name('wallet_log')->insert([
                    'user_type'  => 'master',
                    'user_id'    => $masterId,
                    'type'       => 'settle',
                    'amount'     => $settleAmount,
                    'balance'    => $newMoney,
                    'order_id'   => $orderId,
                    'remark'     => '后台财务确认结算入账' . ($orderNo !== '' ? '（订单 ' . $orderNo . '）' : ''),
                    'createtime' => $now,
                ]);
                $msgText = ($orderNo !== '' ? '订单 ' . $orderNo . ' ' : '') . '服务佣金 ¥' . number_format($settleAmount, 2, '.', '') . ' 已结算至您的平台钱包余额。';
            } else {
                $msgText = ($orderNo !== '' ? '订单 ' . $orderNo . ' ' : '') . '服务佣金 ¥' . number_format($settleAmount, 2, '.', '') . ' 已由财务完成线下特殊结算归档。';
            }

            if ($orderId > 0) {
                Db::name('order')->where('id', $orderId)->update([
                    'settle_status' => 1,
                    'settle_amount' => $settleAmount,
                    'updatetime'    => $now,
                ]);
            }

            Db::name('message')->insert([
                'receive_type' => 'master',
                'receive_id'   => $masterId,
                'type'         => 'order',
                'title'        => '服务佣金结算通知',
                'content'      => mb_substr($msgText, 0, 500),
                'order_id'     => $orderId,
                'is_read'      => 0,
                'createtime'   => $now,
            ]);

            Db::commit();
        } catch (PDOException|\Exception $e) {
            Db::rollback();
            $this->error($e->getMessage());
        }
        $this->success();
    }

    /**
     * 结算单由订单核销系统生成，禁止手动添加
     */
    public function add()
    {
        $this->error('结算单由完工核销自动生成，后台不可手工录入');
    }

    /**
     * 财务结算凭证禁止删除
     */
    public function del($ids = null)
    {
        $this->error('财务结算单据禁止删除');
    }

    /**
     * 禁止跳过钱包流水的批量修改状态
     */
    public function multi($ids = null)
    {
        $this->error('结算单涉及资金划拨，不支持批量修改状态，请逐单核对处理');
    }

    /**
     * 组装结算单对账上下文
     */
    protected function assignSettleContext($row)
    {
        $order = (int)$row['order_id'] > 0 ? Db::name('order')->where('id', (int)$row['order_id'])->find() : null;
        $master = (int)$row['master_id'] > 0 ? Db::name('master')->where('id', (int)$row['master_id'])->find() : null;
        $walletLogs = ((int)$row['master_id'] > 0 && (int)$row['order_id'] > 0)
            ? Db::name('wallet_log')
                ->where('user_type', 'master')
                ->where('user_id', (int)$row['master_id'])
                ->where('order_id', (int)$row['order_id'])
                ->order('id desc')
                ->select()
            : [];

        $this->view->assign([
            'row'        => $row,
            'order'      => $order ?: [],
            'master'     => $master ?: [],
            'walletLogs' => $walletLogs,
        ]);
    }
}