<?php

namespace app\api\controller;

use think\Db;

/**
 * 用户端 · 分销中心（Module-DIST）
 * 路由：
 *   GET  /api/v1/distribution/overview          D1 分销概览
 *   GET  /api/v1/distribution/team              D2 我的团队
 *   POST /api/v1/distribution/withdraw          D3 申请提现
 *   GET  /api/v1/distribution/withdraw-records   D4 提现记录
 */
class Distribution extends V1
{
    /**
     * D1 分销概览
     * GET /api/v1/distribution/overview → {totalCommission,settled,withdrawable,todayCommission,teamCount,l1Count,l2Count,inviteCode,posterUrl,minWithdraw}
     */
    public function overview()
    {
        $user = $this->auth();
        $uid = (int)$user['id'];

        $total = (float)Db::name('fc_commission')->where('user_id', $uid)->where('status', '<>', 2)->sum('amount');
        $settled = (float)Db::name('fc_commission')->where('user_id', $uid)->where('status', 1)->sum('amount');
        $pending = (float)Db::name('fc_commission')->where('user_id', $uid)->where('status', 0)->sum('amount');
        $applied = (float)Db::name('fc_withdraw')->where('user_id', $uid)
            ->where('status', 'in', ['auditing', 'paying', 'paid'])->sum('amount');
        $withdrawable = $settled - $applied;

        $todayStart = strtotime(date('Y-m-d'));
        $todayCommission = (float)Db::name('fc_commission')->where('user_id', $uid)
            ->where('createtime', '>=', $todayStart)->sum('amount');

        $l1 = (int)Db::name('fc_dist_relation')->where('parent_id', $uid)->where('level', 1)->count();
        $l2 = (int)Db::name('fc_dist_relation')->where('parent_id', $uid)->where('level', 2)->count();

        $ext = $this->ext($uid);

        // 商家转账确认收款页需要的商户号与小程序 AppID（非敏感，可下发）
        $epay = (array)get_addon_config('epay');
        $wx   = isset($epay['wechat']) && is_array($epay['wechat']) ? $epay['wechat'] : [];

        $this->ok([
            'totalCommission' => round($total, 2),
            'settled'         => round($settled, 2),
            'pendingCommission' => round($pending, 2),
            'withdrawable'    => round(max(0, $withdrawable), 2),
            'todayCommission' => round($todayCommission, 2),
            'teamCount'       => $l1 + $l2,
            'l1Count'         => $l1,
            'l2Count'         => $l2,
            'inviteCode'      => (string)$ext['invite_code'],
            'posterUrl'       => '',
            // 最低提现金额（后台「分销设置」下发，替代前端写死的 50）
            'minWithdraw'     => (float)$this->cfg('dist.minWithdraw', 50),
            // 提现收款人实名（未填写时前端需先采集）
            'realname'        => isset($ext['realname']) ? (string)$ext['realname'] : '',
            'transferMchId'   => isset($wx['mch_id']) ? (string)$wx['mch_id'] : '',
            'transferAppId'   => isset($wx['miniapp_id']) ? (string)$wx['miniapp_id'] : '',
        ]);
    }

    /**
     * D2 我的团队
     * GET /api/v1/distribution/team 入参 {level?,page,size}
     * → 分页 {list:[{id,nickname,level,joinedAt,performance,commission}],page,size,total,hasMore}
     */
    public function team()
    {
        $user = $this->auth();
        $uid = (int)$user['id'];
        $level = $this->input('level', '');

        // 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 ($uid, $level) {
            $q = Db::name('fc_dist_relation')->alias('r')
                ->join('user u', 'u.id = r.user_id')
                ->where('r.parent_id', $uid);
            if ($level !== '' && $level !== null) {
                $q->where('r.level', (int)$level);
            }
            if ($forCount) {
                return $q;
            }
            return $q->field('r.id,r.user_id,r.level,r.createtime,u.nickname')
                ->order('r.createtime desc');
        });

        $list = [];
        foreach ($rows as $row) {
            $childId = (int)$row['user_id'];
            $commission = (float)Db::name('fc_commission')->where('from_user_id', $childId)->sum('amount');
            $orderAmount = (float)Db::name('fc_order')->where('user_id', $childId)->where('status', 'paid')->sum('amount');
            $performance = $orderAmount > 0 ? $orderAmount : $commission * 5;
            $list[] = [
                'id'          => $childId,
                'nickname'    => (string)$row['nickname'],
                'level'       => (int)$row['level'],
                'joinedAt'    => $this->iso($row['createtime']),
                'performance' => round($performance, 2),
                'commission'  => round($commission, 2),
            ];
        }

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

    /**
     * D3 申请提现
     * POST /api/v1/distribution/withdraw 入参 {amount,channel?} → {withdrawNo,status:'auditing'}
     * 规则 BR-09：金额必填且 >0、且不超过可提现余额
     */
    public function withdraw()
    {
        $user = $this->auth();
        $uid = (int)$user['id'];
        $this->rateLimit('withdraw:' . $uid, 3, 60);

        $amount = round((float)$this->input('amount', 0), 2);
        $min = (float)$this->cfg('dist.minWithdraw', 50);

        if ($amount <= 0) {
            $this->fail('提现金额不合法');
        }
        if ($min > 0 && $amount < $min) {
            $this->fail('最低提现金额为 ' . $min . ' 元');
        }

        // 微信商家转账会校验收款人实名，未填写姓名不允许提现
        $ext = $this->ext($uid);
        if (trim((string)(isset($ext['realname']) ? $ext['realname'] : '')) === '') {
            $this->fail('请先填写收款人真实姓名（需与微信实名一致）');
        }

        $channel = trim((string)$this->input('channel', ''));
        if ($channel === '') {
            $channel = 'wxpay';
        }
        $withdrawNo = $this->orderNo('WD');

        try {
            Db::transaction(function () use ($uid, $amount, $channel, $withdrawNo) {
                // 用户扩展行加锁：同一用户的提现申请串行化，避免并发双花
                Db::name('fc_user_ext')->where('user_id', $uid)->lock(true)->find();

                if ($amount > $this->withdrawable($uid)) {
                    throw new \RuntimeException('提现金额超过可提现余额');
                }

                Db::name('fc_withdraw')->insert([
                    'withdraw_no' => $withdrawNo,
                    'user_id'     => $uid,
                    'amount'      => $amount,
                    'channel'     => $channel,
                    'status'      => 'auditing',
                    'reason'      => '',
                    'paytime'     => null,
                    'createtime'  => time(),
                    'updatetime'  => time(),
                ]);
            });
        } catch (\Throwable $e) {
            $this->fail($e->getMessage() ?: '提现申请失败，请重试');
        }

        $this->notify($uid, 'system', '提现申请已提交', '提现 ¥' . $amount . ' 已提交，预计 T+7 到账');

        $this->ok(['withdrawNo' => $withdrawNo, 'status' => 'auditing']);
    }

    /**
     * D4 提现记录
     * GET /api/v1/distribution/withdraw-records → [{id,withdrawNo,amount,status,createdAt}]
     */
    public function withdrawRecords()
    {
        $user = $this->auth();
        $rows = Db::name('fc_withdraw')->where('user_id', $user['id'])
            ->order('createtime desc')->select();

        $list = [];
        foreach ($rows as $row) {
            $list[] = [
                'id'             => (int)$row['id'],
                'withdrawNo'     => (string)$row['withdraw_no'],
                'amount'         => round((float)$row['amount'], 2),
                'status'         => (string)$row['status'],
                'transferStatus' => (string)(isset($row['transfer_status']) ? $row['transfer_status'] : ''),
                'packageInfo'    => (string)(isset($row['package_info']) ? $row['package_info'] : ''),
                'failReason'     => (string)(isset($row['fail_reason']) ? $row['fail_reason'] : ''),
                'createdAt'      => $this->iso($row['createtime']),
            ];
        }

        $this->ok($list);
    }

    /**
     * 可提现余额 = Σ已结算佣金(status=1) - Σ(申请中/已打款)提现
     */
    protected function withdrawable($uid)
    {
        $settled = (float)Db::name('fc_commission')->where('user_id', $uid)->where('status', 1)->sum('amount');
        $applied = (float)Db::name('fc_withdraw')->where('user_id', $uid)
            ->where('status', 'in', ['auditing', 'paying', 'paid'])->sum('amount');
        return $settled - $applied;
    }
}