<?php

namespace app\api\controller;

use app\common\library\WithdrawText;
use think\Db;

/**
 * 后台管理端 · 分销管理（Module-ADM-DIST）
 * 路由：
 *   GET  /api/v1/admin/dist/setting            AD1 分销设置读取
 *   POST /api/v1/admin/dist/setting            AD2 分销设置保存
 *   GET  /api/v1/admin/dist/withdraws          AD3 提现申请列表
 *   POST /api/v1/admin/dist/withdraw/:id/pay   AD4 提现审核（打款/驳回）
 */
class AdminDist 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();
    }

    /**
     * AD1 分销设置读取
     * GET /api/v1/admin/dist/setting → {enabled,level,level1Rate,level2Rate,settleCycle,minWithdraw}
     */
    public function setting()
    {
        if ($this->request->isPost()) {
            $this->saveSetting();
        }
        $this->ok($this->distConfig());
    }

    /**
     * AD2 分销设置保存
     * POST /api/v1/admin/dist/setting 入参 {enabled,level,level1Rate,level2Rate,settleCycle,minWithdraw}
     * 规则 BR-08：一级+二级分佣比例不能超过 100%
     */
    public function saveSetting()
    {
        $enabled = $this->input('enabled', $this->cfg('dist.enabled', 1));
        $level = (int)$this->input('level', $this->cfg('dist.level', 2));
        $level1Rate = (float)$this->input('level1Rate', $this->cfg('dist.level1Rate', 20));
        $level2Rate = (float)$this->input('level2Rate', $this->cfg('dist.level2Rate', 10));
        $settleCycle = (string)$this->input('settleCycle', $this->cfg('dist.settleCycle', 'T+7'));
        $minWithdraw = (float)$this->input('minWithdraw', $this->cfg('dist.minWithdraw', 50));

        if ($level1Rate + $level2Rate > 100) {
            $this->fail('一级+二级分佣比例不能超过 100%');
        }

        $this->setCfg('dist.enabled', $enabled ? 1 : 0);
        $this->setCfg('dist.level', $level);
        $this->setCfg('dist.level1Rate', $level1Rate);
        $this->setCfg('dist.level2Rate', $level2Rate);
        $this->setCfg('dist.settleCycle', $settleCycle);
        $this->setCfg('dist.minWithdraw', $minWithdraw);

        $this->adminLog('修改分销设置');

        $this->ok($this->distConfig());
    }

    /**
     * AD3 提现申请列表
     * GET /api/v1/admin/dist/withdraws → 数组 [{id,withdrawNo,user,amount,status,channel,createdAt}]
     */
    public function withdraws()
    {
        $rows = Db::name('fc_withdraw')->alias('w')
            ->join('user u', 'u.id = w.user_id', 'LEFT')
            ->field('w.*, u.nickname AS nickname')
            ->order('w.createtime desc')
            ->select();

        // 兜底同步：转账中的单据主动查一次微信（回调丢失/本地无 HTTPS 回调时）
        $synced = 0;
        foreach ($rows as $row) {
            if ((string)$row['status'] === 'paying' && $synced < 5) {
                $synced++;
                try {
                    \app\common\library\WxTransfer::sync((int)$row['id']);
                } catch (\Throwable $e) {
                    // 同步失败不影响列表展示
                }
            }
        }
        if ($synced > 0) {
            $rows = Db::name('fc_withdraw')->alias('w')
                ->join('user u', 'u.id = w.user_id', 'LEFT')
                ->field('w.*, u.nickname AS nickname')
                ->order('w.createtime desc')
                ->select();
        }

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

        $this->ok($list);
    }

    /**
     * AD4 提现审核
     * POST /api/v1/admin/dist/withdraw/:id/pay 入参 {op,reason?} → {id,status}
     * 规则 BR-09：op=reject 时 reason 必填
     */
    public function handleWithdraw()
    {
        $id = (int)$this->request->param('id', 0);
        $op = (string)$this->input('op', '');
        $reason = trim((string)$this->input('reason', ''));

        if ($op === 'reject' && $reason === '') {
            $this->fail('驳回需填写原因');
        }

        $withdraw = Db::name('fc_withdraw')->where('id', $id)->find();
        if (!$withdraw) {
            $this->fail('提现记录不存在', 404);
        }
        if ((string)$withdraw['status'] !== 'auditing') {
            $this->fail('该提现记录已处理（当前状态：' . $withdraw['status'] . '），请勿重复操作');
        }

        if ($op === 'reject') {
            try {
                Db::transaction(function () use ($id, $reason) {
                    $locked = Db::name('fc_withdraw')->where('id', $id)->lock(true)->find();
                    if (!$locked || (string)$locked['status'] !== 'auditing') {
                        throw new \RuntimeException('该提现记录已处理，请刷新后重试');
                    }
                    Db::name('fc_withdraw')->where('id', $id)->update([
                        'status'     => 'rejected',
                        'reason'     => $reason,
                        'updatetime' => time(),
                    ]);
                    $this->notify($locked['user_id'], 'system', '提现被驳回', '您的提现申请被驳回：' . $reason);
                });
            } catch (\Throwable $e) {
                $this->fail($e->getMessage() ?: '操作失败，请重试');
            }

            $this->adminLog('驳回提现 #' . $id);
            $this->ok(['id' => (int)$id, 'status' => 'rejected']);
        }

        // 审核通过 → 自动发起微信商家转账（用户需在微信确认收款）
        try {
            $res = \app\common\library\WxTransfer::approve($id);
        } catch (\Throwable $e) {
            $this->fail('转账失败：' . $e->getMessage());
        }

        $this->adminLog('提现转账 #' . $id . ' 结果' . $res['state']);

        $message = $res['withdrawState'] === 'paid'
            ? '转账成功，已到账'
            : ($res['withdrawState'] === 'failed' ? '转账失败，请查看失败原因' : '已提交转账，等待用户确认收款');

        $this->ok([
            'id'            => (int)$id,
            'status'        => $res['withdrawState'],
            'transferState' => $res['state'],
        ], $message);
    }

    /**
     * 撤销「转账中」的提现单（用户长期不确认收款时使用）
     * POST /api/v1/admin/dist/withdraw/:id/cancel
     */
    public function cancelWithdraw()
    {
        $id = (int)$this->request->param('id', 0);

        try {
            $state = \app\common\library\WxTransfer::cancel($id);
        } catch (\Throwable $e) {
            $this->fail('撤销失败：' . $e->getMessage());
        }

        $this->adminLog('撤销提现转账 #' . $id);
        $this->ok([
            'id'            => $id,
            'status'        => (string)Db::name('fc_withdraw')->where('id', $id)->value('status'),
            'transferState' => $state,
        ]);
    }

    /** 组装分销设置结构 */
    protected function distConfig()
    {
        return [
            'enabled'     => (bool)$this->cfg('dist.enabled', 1),
            'level'       => (int)$this->cfg('dist.level', 2),
            'level1Rate'  => (float)$this->cfg('dist.level1Rate', 20),
            'level2Rate'  => (float)$this->cfg('dist.level2Rate', 10),
            'settleCycle' => (string)$this->cfg('dist.settleCycle', 'T+7'),
            'minWithdraw' => (float)$this->cfg('dist.minWithdraw', 50),
        ];
    }
}