<?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（手动输入）
 *   POST /api/v1/auth/wx-phone    A5 微信手机号快捷获取（getPhoneNumber）
 *   POST /api/v1/auth/avatar      A6 头像上传（用户端）
 *   POST /api/v1/auth/switch-type A3 个人/商家身份切换
 *   GET|POST /api/v1/auth/profile A4 个人资料（GET 读取 / POST 更新昵称与头像）
 */
class Auth extends V1
{
    /**
     * A1 微信一键授权登录
     * 入参 { code, nickname?, avatar? }  →  出参 { token, refreshToken, userInfo }
     * 规则：code 必填；首次登录自动建档并生成邀请码；
     *      v1.0.9 起支持携带微信昵称/头像（小程序用 `open-type="chooseAvatar"` + `<input type="nickname">` 采集），
     *      新用户直接落库、老用户填了就更新，保证后台「会员列表」能看到真实微信昵称与头像。
     */
    public function wxLogin()
    {
        $code = trim((string)$this->input('code', ''));
        if (!$code) {
            $this->fail('缺少微信授权 code');
        }

        $nickname = trim((string)$this->input('nickname', ''));
        $avatar = trim((string)$this->input('avatar', ''));
        if (mb_strlen($nickname) > 32) {
            $nickname = mb_substr($nickname, 0, 32);
        }

        $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（有微信昵称/头像就落库，否则用占位昵称 + 字母头像）
            $uid = Db::name('user')->insertGetId([
                'group_id'   => 1,
                'username'   => 'wx' . substr(md5($openid), 0, 10),
                'nickname'   => $nickname !== '' ? $nickname : '同城用户' . mt_rand(1000, 9999),
                'password'   => md5(mt_rand()),
                'salt'       => 'wx',
                'email'      => substr(md5($openid), 0, 12) . '@wx.local',
                'mobile'     => '',
                'avatar'     => $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();
        } else {
            // 老用户：仅在本次带上了新值且确实不同时更新（不覆盖运营在后台改过的资料）
            $update = [];
            if ($nickname !== '' && $nickname !== (string)$user['nickname']) {
                $update['nickname'] = $nickname;
            }
            if ($avatar !== '' && $avatar !== (string)$user['avatar']) {
                $update['avatar'] = $avatar;
            }
            if ($update) {
                $update['updatetime'] = time();
                Db::name('user')->where('id', $user['id'])->update($update);
                $user = Db::name('user')->where('id', $user['id'])->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]);
    }

    /**
     * A5 微信手机号快捷获取
     * 入参 { code }（`<button open-type="getPhoneNumber">` 回调里的 `e.detail.code`）
     *   →  出参 { phone }
     * 规则：用小程序 access_token 调 phonenumber.getPhoneNumber 换号并写入 fa_user.mobile；
     *      未配置微信参数 / 微信侧失败（快捷验证未开通、code 失效、用户拒绝）时返回业务失败，
     *      前端据此回落到「手动输入手机号」（A2 bindPhone），保证任何情况下都能拿到号码。
     */
    public function wxPhone()
    {
        $user = $this->auth();

        $code = trim((string)$this->input('code', ''));
        if ($code === '') {
            $this->fail('缺少手机号授权 code');
        }

        $appid = (string)$this->cfg('wx.appid', '');
        $secret = (string)$this->cfg('wx.secret', '');
        if ($appid === '' || $secret === '') {
            $this->fail('未配置小程序 AppID/AppSecret，请改用手动输入');
        }

        $token = $this->wxAccessToken($appid, $secret);
        if ($token === '') {
            $this->fail('微信 access_token 获取失败，请改用手动输入');
        }

        $ctx = stream_context_create([
            'http' => [
                'method'        => 'POST',
                'header'        => "Content-Type: application/json\r\n",
                'content'       => json_encode(['code' => $code]),
                'timeout'       => 10,
                'ignore_errors' => true,
            ],
        ]);
        $res = @json_decode(@file_get_contents(
            'https://api.weixin.qq.com/wxa/business/getuserphonenumber?access_token=' . $token,
            false,
            $ctx
        ), true);

        $phone = '';
        if (!empty($res['phone_info']['phoneNumber'])) {
            $phone = (string)$res['phone_info']['phoneNumber'];
        } elseif (!empty($res['phone_info']['purePhoneNumber'])) {
            $phone = (string)$res['phone_info']['purePhoneNumber'];
        }
        if (!preg_match('/^1\d{10}$/', $phone)) {
            // 常见原因：手机号快捷验证未开通/额度用尽、code 已失效、用户拒绝授权
            $this->fail('微信手机号获取失败，请改用手动输入');
        }

        Db::name('user')->where('id', $user['id'])->update([
            'mobile' => $phone, 'updatetime' => time(),
        ]);

        $this->ok(['phone' => $phone]);
    }

    /**
     * 小程序 access_token（带缓存，提前 5 分钟失效）
     * 缓存写入 fc_config 的 wx.accessToken / wx.accessTokenExpire（仅服务端读取，不下发前端）
     * @param string $appid
     * @param string $secret
     * @return string 失败返回空串
     */
    protected function wxAccessToken($appid, $secret)
    {
        $now = time();
        $cached = (string)$this->cfg('wx.accessToken', '');
        $expire = (int)$this->cfg('wx.accessTokenExpire', 0);
        if ($cached !== '' && $expire > $now + 300) {
            return $cached;
        }

        $url = 'https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential'
            . '&appid=' . $appid . '&secret=' . $secret;
        $res = @json_decode(@file_get_contents($url), true);
        if (empty($res['access_token'])) {
            return '';
        }

        $this->setCfg('wx.accessToken', (string)$res['access_token']);
        $this->setCfg('wx.accessTokenExpire', $now + (int)(!empty($res['expires_in']) ? $res['expires_in'] : 7200));

        return (string)$res['access_token'];
    }

    /**
     * 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]);
    }

    /**
     * A6 头像上传（用户端）
     * POST /api/v1/auth/avatar   multipart: file
     *   →  { url, avatar }
     * 说明：复用 FastAdmin 上传库（与后台上传同一套类型/大小校验与存储）；
     *      `avatar` 返回相对路径（与 fa_user.avatar 存储一致，后台列表用 cdnurl 拼完整地址），
     *      `url` 为完整地址，供小程序立即展示。
     */
    public function uploadAvatar()
    {
        $user = $this->auth();

        $file = $this->request->file('file');
        if (!$file) {
            $this->fail('未接收到上传文件');
        }
        try {
            $upload = new \app\common\library\Upload($file);
            $attachment = $upload->upload();
        } catch (\Exception $e) {
            $this->fail($e->getMessage());
        }

        $path = (string)$attachment->url;
        Db::name('user')->where('id', $user['id'])->update([
            'avatar'     => $path,
            'updatetime' => time(),
        ]);

        $this->ok(['url' => cdnurl($path, true), 'avatar' => $path]);
    }

    /**
     * A4 个人资料
     * GET  → userInfo（含会员状态、余额）
     * POST { nickname?, avatar? } → 更新后的 userInfo（微信昵称/头像可在登录后随时补填）
     */
    public function profile()
    {
        $user = $this->auth();

        if ($this->request->isPost()) {
            $nickname = trim((string)$this->input('nickname', ''));
            $avatar = trim((string)$this->input('avatar', ''));
            $update = [];
            if ($nickname !== '') {
                if (mb_strlen($nickname) > 32) {
                    $nickname = mb_substr($nickname, 0, 32);
                }
                $update['nickname'] = $nickname;
            }
            if ($avatar !== '') {
                $update['avatar'] = $avatar;
            }
            if (!$update) {
                $this->fail('没有需要更新的资料');
            }
            $update['updatetime'] = time();
            Db::name('user')->where('id', $user['id'])->update($update);
            $user = Db::name('user')->where('id', $user['id'])->find();
        }

        $this->ok($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);
    }
}