<?php

namespace app\admin\controller;

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

/**
 * 提现申请
 *
 * 提现单仅由师傅端发起，后台只负责财务审核与打款标记：
 * 待审核(wait) → 审核通过(pass)/驳回(reject)；审核通过(pass) → 打款完成(done)/驳回(reject)
 * 驳回自动解冻并退回师傅余额，打款完成自动划出冻结资金
 *
 * @icon fa fa-rmb
 */
class Withdraw extends Backend
{

    /**
     * Withdraw模型对象
     * @var \app\admin\model\Withdraw
     */
    protected $model = null;

    /**
     * 审核状态机：当前状态 => 允许流转到的目标状态
     * reject/done 为终态，不允许再变更
     * @var array
     */
    protected $statusFlow = [
        'wait'   => ['pass', 'reject'],
        'pass'   => ['done', 'reject'],
    ];

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

    /**
     * 提现列表：关联师傅信息，展示联系方式与处理时间
     */
    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 = $this->model
            ->with(['master'])
            ->where($where)
            ->order($sort, $order)
            ->paginate($limit);
        $result = ['total' => $list->total(), 'rows' => $list->items()];
        return json($result);
    }

    /**
     * 财务审核：申请信息只读，仅允许合法状态流转并做资金联动
     * - 驳回：退回师傅余额并解冻，写入钱包流水，通知师傅
     * - 通过：仅标记审核通过，等待财务打款
     * - 打款完成：划出冻结资金，写入钱包流水，通知师傅
     */
    public function edit($ids = null)
    {
        $row = $this->model->get($ids);
        if (!$row) {
            $this->error(__('No Results were found'));
        }
        if (false === $this->request->isPost()) {
            // 展示师傅当前钱包情况，辅助财务判断
            $master = Db::name('master')->where('id', (int)$row['master_id'])->field('id,realname,mobile,user_id,money,frozen_money')->find();
            $this->view->assign('row', $row);
            $this->view->assign('master', $master ?: []);
            $this->view->assign('flowOptions', $this->statusFlow[$row['status']] ?? []);
            return $this->view->fetch();
        }

        $status   = (string)$this->request->post('row.status');
        $auditMsg = trim((string)$this->request->post('row.audit_msg'));

        // 状态机校验：终态禁止操作，流转目标必须合法
        if (!isset($this->statusFlow[$row['status']])) {
            $this->error('该提现单已处于终态（已驳回/已打款），不允许再次审核');
        }
        if (!in_array($status, $this->statusFlow[$row['status']], true)) {
            $this->error('状态流转不合法，请刷新后重试');
        }
        if ($status === 'reject' && $auditMsg === '') {
            $this->error('驳回时必须填写驳回原因');
        }

        $masterId = (int)$row['master_id'];
        $amount   = round((float)$row['amount'], 2);
        Db::startTrans();
        try {
            // 乐观锁更新状态，防止并发重复审核
            $affected = Db::name('withdraw')
                ->where('id', $row['id'])
                ->where('status', $row['status'])
                ->update([
                    'status'     => $status,
                    'audit_msg'  => $auditMsg,
                    'updatetime' => time(),
                ]);
            if (!$affected) {
                throw new \Exception('提现单状态已被其他人变更，请刷新后重试');
            }

            $master = Db::name('master')->where('id', $masterId)->lock(true)->find();
            if (!$master) {
                throw new \Exception('提现师傅不存在');
            }

            if ($status === 'reject') {
                // 驳回：解冻并退回余额，写入钱包流水
                $newMoney = round((float)$master['money'] + $amount, 2);
                Db::name('master')->where('id', $masterId)->update([
                    'money'        => $newMoney,
                    'frozen_money' => round((float)$master['frozen_money'] - $amount, 2),
                    'updatetime'   => time(),
                ]);
                Db::name('wallet_log')->insert([
                    'user_type'  => 'master',
                    'user_id'    => $masterId,
                    'type'       => 'refund',
                    'amount'     => $amount,
                    'balance'    => $newMoney,
                    'order_id'   => 0,
                    'remark'     => '提现驳回，申请金额退回钱包余额' . ($auditMsg !== '' ? '（原因：' . $auditMsg . '）' : ''),
                    'createtime' => time(),
                ]);
                $this->sendMasterMessage((int)$master['user_id'], '提现申请已驳回', '您的提现申请 ¥' . $amount . ' 未通过财务审核：' . ($auditMsg !== '' ? $auditMsg : '无') . '，申请金额已退回钱包余额');
            } elseif ($status === 'pass') {
                // 审核通过：仅标记，资金保持冻结，等待财务打款
                $this->sendMasterMessage((int)$master['user_id'], '提现审核通过', '您的提现申请 ¥' . $amount . ' 已通过审核，财务将尽快安排打款到 ' . ($row['channel'] === 'bank' ? '银行卡' : '微信钱包'));
            } elseif ($status === 'done') {
                // 打款完成：冻结资金划出
                Db::name('master')->where('id', $masterId)->update([
                    'frozen_money' => round((float)$master['frozen_money'] - $amount, 2),
                    'updatetime'   => time(),
                ]);
                Db::name('wallet_log')->insert([
                    'user_type'  => 'master',
                    'user_id'    => $masterId,
                    'type'       => 'withdraw',
                    'amount'     => 0,
                    'balance'    => (float)$master['money'],
                    'order_id'   => 0,
                    'remark'     => '提现打款完成，冻结资金 ¥' . $amount . ' 划出（' . ($row['channel'] === 'bank' ? '银行储蓄卡' : '微信钱包') . ' ' . $row['account'] . '）',
                    'createtime' => time(),
                ]);
                $this->sendMasterMessage((int)$master['user_id'], '提现打款完成', '您的提现 ¥' . $amount . ' 已打款成功，请留意到账通知');
            }
            Db::commit();
        } catch (PDOException|\Exception $e) {
            Db::rollback();
            $this->error($e->getMessage());
        }
        $this->success();
    }

    /**
     * 提现单仅由师傅端发起，禁止后台手工添加
     */
    public function add()
    {
        $this->error('提现申请仅支持师傅端发起，后台不可手动添加');
    }

    /**
     * 提现流水记录禁止删除，保障资金对账完整
     */
    public function del($ids = null)
    {
        $this->error('提现申请记录禁止删除');
    }

    /**
     * 禁止批量修改状态，状态变更必须走审核流程以触发资金联动
     */
    public function multi($ids = null)
    {
        $this->error('提现审核不支持批量操作，请逐单审核处理');
    }

    /**
     * 向师傅所属用户发送站内消息
     * @param int $userId 用户ID
     * @param string $title 消息标题
     * @param string $content 消息内容
     */
    protected function sendMasterMessage($userId, $title, $content)
    {
        if (!$userId) {
            return;
        }
        Db::name('message')->insert([
            'receive_type' => 'user',
            'receive_id'   => $userId,
            'type'         => 'system',
            'title'        => mb_substr((string)$title, 0, 100),
            'content'      => mb_substr((string)$content, 0, 500),
            'order_id'     => 0,
            'is_read'      => 0,
            'createtime'   => time(),
        ]);
    }
}