<?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}
     */
    public function overview()
    {
        $user = $this->auth();
        $uid = (int)$user['id'];

        $total = (float)Db::name('fc_commission')->where('user_id', $uid)->sum('amount');
        $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', '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);

        $this->ok([
            'totalCommission' => round($total, 2),
            'settled'         => round($settled, 2),
            'withdrawable'    => round($withdrawable, 2),
            'todayCommission' => round($todayCommission, 2),
            'teamCount'       => $l1 + $l2,
            'l1Count'         => $l1,
            'l2Count'         => $l2,
            'inviteCode'      => (string)$ext['invite_code'],
            'posterUrl'       => '',
        ]);
    }

    /**
     * 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'];
        list($page, $size) = $this->pager();
        $level = $this->input('level', '');

        $query = Db::name('fc_dist_relation')->alias('r')
            ->join('user u', 'u.id = r.user_id')
            ->where('r.parent_id', $uid);
        if ($level !== '' && $level !== null) {
            $query->where('r.level', (int)$level);
        }
        $total = $query->count();
        $rows = $query->field('r.id,r.user_id,r.level,r.createtime,u.nickname')
            ->order('r.createtime desc')
            ->page($page, $size)
            ->select();

        $list = [];
        foreach ($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'];
        $amount = (float)$this->input('amount', 0);

        if ($amount <= 0) {
            $this->fail('提现金额不合法');
        }
        if ($amount > $this->withdrawable($uid)) {
            $this->fail('提现金额超过可提现余额');
        }

        $channel = trim((string)$this->input('channel', ''));
        if ($channel === '') {
            $channel = 'wxpay';
        }
        $amount = round($amount, 2);
        $withdrawNo = $this->orderNo('WD');

        Db::name('fc_withdraw')->insert([
            'withdraw_no' => $withdrawNo,
            'user_id'     => $uid,
            'amount'      => $amount,
            'channel'     => $channel,
            'status'      => 'auditing',
            'reason'      => '',
            'paytime'     => null,
            'createtime'  => time(),
            'updatetime'  => time(),
        ]);

        $this->notify($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'],
                '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', 'paid'])->sum('amount');
        return $settled - $applied;
    }
}