<?php

namespace app\api\controller;

use think\Db;

/**
 * 后台管理端 · 财务管理（Module-ADM-FINANCE）
 * 路由：
 *   GET /api/v1/admin/finance/flows    AF1 资金流水
 *   GET /api/v1/admin/finance/report   AF2 财务报表
 */
class AdminFinance 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();
    }

    /**
     * AF1 资金流水
     * GET /api/v1/admin/finance/flows 入参 {type?,page,size}
     * → 分页 {list:[{id,flowNo,type,scene,amount,balance,createdAt}],page,size,total,hasMore}
     */
    public function flows()
    {
        $type = trim((string)$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) {
            $q = Db::name('fc_finance_flow');
            if ($type !== '') {
                $q->where('type', $type);
            }
            if ($forCount) {
                return $q;
            }
            return $q->order('createtime desc');
        });

        $list = [];
        foreach ($rows as $row) {
            $list[] = [
                'id'        => (int)$row['id'],
                'flowNo'    => (string)$row['flow_no'],
                'type'      => (string)$row['type'],
                'scene'     => (string)$row['scene'],
                'amount'    => (float)$row['amount'],
                'balance'   => (float)$row['balance'],
                'createdAt' => $this->iso($row['createtime']),
            ];
        }

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

    /**
     * AF2 财务报表
     * GET /api/v1/admin/finance/report 入参 {period: day|month|year}
     * → {period, rows:[{period,postIncome,memberIncome,rechargeIncome,withdraw,net}]}
     */
    public function report()
    {
        $period = trim((string)$this->input('period', 'day'));
        if (!in_array($period, ['day', 'month', 'year'], true)) {
            $period = 'day';
        }

        $fmtMap = ['day' => '%Y-%m-%d', 'month' => '%Y-%m', 'year' => '%Y'];
        $fmt = $fmtMap[$period];

        $post = $this->periodOrderSum('post', $fmt);
        $member = $this->periodOrderSum('member', $fmt);
        $recharge = $this->periodOrderSum('recharge', $fmt);
        $withdraw = $this->periodWithdrawSum($fmt);

        $keys = array_unique(array_merge(
            array_keys($post),
            array_keys($member),
            array_keys($recharge),
            array_keys($withdraw)
        ));
        sort($keys);

        $rows = [];
        foreach ($keys as $k) {
            $p = isset($post[$k]) ? (float)$post[$k] : 0;
            $m = isset($member[$k]) ? (float)$member[$k] : 0;
            $r = isset($recharge[$k]) ? (float)$recharge[$k] : 0;
            $w = isset($withdraw[$k]) ? (float)$withdraw[$k] : 0;
            $rows[] = [
                'period'         => (string)$k,
                'postIncome'     => $p,
                'memberIncome'   => $m,
                'rechargeIncome' => $r,
                'withdraw'       => $w,
                'net'            => round($p + $m + $r - $w, 2),
            ];
        }

        $this->ok(['period' => $period, 'rows' => $rows]);
    }

    /** 按周期聚合某类已支付订单金额，返回 [period => total] */
    protected function periodOrderSum($type, $fmt)
    {
        $rows = Db::name('fc_order')
            ->where('status', 'paid')
            ->where('type', $type)
            ->field("FROM_UNIXTIME(createtime, '{$fmt}') AS period, SUM(amount) AS total")
            ->group('period')
            ->select();

        $map = [];
        foreach ($rows as $row) {
            $map[$row['period']] = (float)$row['total'];
        }
        return $map;
    }

    /** 按周期聚合已打款提现金额，返回 [period => total] */
    protected function periodWithdrawSum($fmt)
    {
        $rows = Db::name('fc_withdraw')
            ->where('status', 'paid')
            ->whereNotNull('paytime')
            ->field("FROM_UNIXTIME(paytime, '{$fmt}') AS period, SUM(amount) AS total")
            ->group('period')
            ->select();

        $map = [];
        foreach ($rows as $row) {
            $map[$row['period']] = (float)$row['total'];
        }
        return $map;
    }
}