<?php

namespace app\api\controller;

use think\Db;

/**
 * 用户端 · 认证与登录（Module-AUTH）
 * 路由：
 *   POST /api/v1/auth/wx-login    A1 微信授权登录
 *   POST /api/v1/auth/bind-phone  A2 手机号绑定
 *   POST /api/v1/auth/switch-type A3 个人/商家身份切换
 *   GET  /api/v1/auth/profile     A4 个人资料
 */
class Auth extends V1
{
    /**
     * A1 微信一键授权登录
     * 入参 { code }  →  出参 { token, refreshToken, userInfo }
     * 规则：code 必填；首次登录自动建档并生成邀请码
     */
    public function wxLogin()
    {
        $code = trim((string)$this->input('code', ''));
        if (!$code) {
            $this->fail('缺少微信授权 code');
        }

        $openid = $this->resolveOpenid($code);

        $ext = Db::name('fc_user_ext')->where('openid', $openid)->find();
        $user = $ext ? Db::name('user')->where('id', $ext['user_id'])->find() : null;

        if (!$user) {
            // 首次登录：自动建号
            $uid = Db::name('user')->insertGetId([
                'group_id'   => 1,
                'username'   => 'wx' . substr(md5($openid), 0, 10),
                'nickname'   => '同城用户' . mt_rand(1000, 9999),
                'password'   => md5(mt_rand()),
                'salt'       => 'wx',
                'email'      => substr(md5($openid), 0, 12) . '@wx.local',
                'mobile'     => '',
                'avatar'     => '',
                'level'      => 1,
                'money'      => 0,
                'score'      => 0,
                'status'     => 'normal',
                'jointime'   => time(),
                'joinip'     => $this->request->ip(),
                'createtime' => time(),
                'updatetime' => time(),
            ]);
            Db::name('fc_user_ext')->insert([
                'user_id' => $uid, 'openid' => $openid, 'user_type' => 1, 'realname_status' => 0,
                'is_member' => 0, 'member_level' => '', 'member_expiretime' => null,
                'invite_code' => strtoupper(substr(md5('fc' . $uid), 0, 6)), 'inviter_id' => 0,
                'free_view_date' => date('Y-m-d'), 'free_view_used' => 0,
                'createtime' => time(), 'updatetime' => time(),
            ]);
            $user = Db::name('user')->where('id', $uid)->find();
        }

        if ($user['status'] != 'normal') {
            $this->fail('账号已被禁用，请联系客服');
        }

        $token = $this->issueToken($user['id']);
        $this->ok([
            'token'        => $token,
            'refreshToken' => md5($token . 'refresh'),
            'userInfo'     => $this->userInfo($user),
        ]);
    }

    /**
     * A2 手机号授权绑定
     * 入参 { phone }  →  出参 { phone }
     * 规则 BR-02：必须匹配 ^1\d{10}$
     */
    public function bindPhone()
    {
        $user = $this->auth();
        $phone = trim((string)$this->input('phone', ''));
        if (!preg_match('/^1\d{10}$/', $phone)) {
            $this->fail('手机号格式不正确');
        }
        Db::name('user')->where('id', $user['id'])->update([
            'mobile' => $phone, 'updatetime' => time(),
        ]);
        $this->ok(['phone' => $phone]);
    }

    /**
     * A3 用户类型切换
     * 入参 { userType: 1|2, license? }  →  出参 { userType, needAudit }
     * 规则 BR-01：切换商家必须提交营业执照，提交后进入待审核
     */
    public function switchType()
    {
        $user = $this->auth();
        $userType = (int)$this->input('userType', 0);
        if (!in_array($userType, [1, 2], true)) {
            $this->fail('用户类型不合法');
        }

        if ($userType === 2) {
            $license = trim((string)$this->input('license', ''));
            if (!$license) {
                $this->fail('商家用户需上传营业执照完成资质认证');
            }
            $name = trim((string)$this->input('merchantName', ''));
            $exists = Db::name('fc_merchant')->where('user_id', $user['id'])->find();
            $data = [
                'user_id'      => $user['id'],
                'name'         => $name !== '' ? $name : (string)$user['nickname'],
                'license'      => $license,
                'audit_status' => 0,
                'shop_status'  => 'pending',
                'updatetime'   => time(),
            ];
            if ($exists) {
                Db::name('fc_merchant')->where('id', $exists['id'])->update($data);
            } else {
                $data['createtime'] = time();
                Db::name('fc_merchant')->insert($data);
            }
        }

        Db::name('fc_user_ext')->where('user_id', $user['id'])->update([
            'user_type' => $userType, 'updatetime' => time(),
        ]);

        $this->ok(['userType' => $userType, 'needAudit' => $userType === 2]);
    }

    /**
     * A4 个人资料
     * 返回 userInfo（含会员状态、余额）
     */
    public function profile()
    {
        $user = $this->auth();
        $this->ok($this->userInfo($user));
    }

    /**
     * code -> openid
     * 已配置微信参数时走 jscode2session；未配置（本地/联调）时用确定性派生，便于前后端联调。
     */
    protected function resolveOpenid($code)
    {
        $appid = (string)$this->cfg('wx.appid', '');
        $secret = (string)$this->cfg('wx.secret', '');
        if ($appid && $secret) {
            $url = 'https://api.weixin.qq.com/sns/jscode2session?appid=' . $appid
                . '&secret=' . $secret . '&js_code=' . urlencode($code) . '&grant_type=authorization_code';
            $res = @json_decode(@file_get_contents($url), true);
            if (!empty($res['openid'])) {
                return $res['openid'];
            }
        }
        // 未配置微信参数：若 code 本身即为 openid 标识则直接采用，否则派生
        if (strpos($code, 'openid_') === 0) {
            return $code;
        }
        return 'openid_' . md5($code);
    }
}