<?php

namespace app\api\controller;

use think\Db;

/**
 * 用户端 · 商家门店与主页（Module-MERCHANT）
 * 路由：
 *   GET /api/v1/merchant/:id         M1 商家公开主页/门店详情
 *   GET /api/v1/merchant/:id/posts   M2 商家名下发布的信息流（分页）
 */
class Merchant extends V1
{
    /**
     * M1 获取商家门店详情及公开档案
     * GET /api/v1/merchant/:id
     * 规则：允许游客；支持通过 merchant.id 或 user_id 查询；若提供客户端坐标则计算到店距离
     *
     * @return void
     */
    public function detail()
    {
        $id = (int)$this->routeId();
        if ($id <= 0) {
            $id = (int)$this->input('id', 0) ?: (int)$this->input('userId', 0);
        }
        if ($id <= 0) {
            $this->fail('缺少商家参数', 400);
        }

        // 优先按 merchant.id 查，若未命中再按 user_id 查
        $m = Db::name('fc_merchant')->where('id', $id)->find();
        if (!$m) {
            $m = Db::name('fc_merchant')->where('user_id', $id)->find();
        }
        if (!$m) {
            $this->fail('商家门店不存在', 404);
        }

        // 关联发布者基础信息
        $user = Db::name('user')->where('id', $m['user_id'])->find();
        $userNickname = $user ? (string)$user['nickname'] : '';
        $userAvatar = $user ? (string)$user['avatar'] : '';

        // 统计真实有效发布数量
        $postCount = (int)Db::name('fc_post')
            ->where('user_id', $m['user_id'])
            ->where('status', 1)
            ->where('audit_status', 1)
            ->whereNull('deletetime')
            ->count();

        // 计算用户与门店之间的物理距离（km）
        $clientLat = $this->coord('lat', 90);
        $clientLng = $this->coord('lng', 180);
        $distance = null;
        if ($clientLat !== null && $clientLng !== null && !empty($m['lat']) && !empty($m['lng'])) {
            $distance = $this->calcDistance($clientLat, $clientLng, (float)$m['lat'], (float)$m['lng']);
        }

        // 首屏拉取前 6 条该商家的有效发帖
        $posts = $this->fetchMerchantPosts($m['user_id'], 1, 6);

        // 严格保护商家联系电话：未付费解锁或非会员状态下脱敏，杜绝从信息详情页跳转商家主页白嫖绕过
        $rawContact = (string)(isset($m['contact']) ? $m['contact'] : '');
        $unlocked = false;
        $me = $this->user();
        if ($me) {
            $now = time();
            $ext = $this->ext($me['id']);
            $isMember = (int)$ext['is_member'] === 1
                && !empty($ext['member_expiretime']) && (int)$ext['member_expiretime'] > $now;
            $isOwner = (int)$m['user_id'] === (int)$me['id'];
            if ($isOwner || $isMember) {
                $unlocked = true;
            } else {
                // 检查是否从已解锁的关联信息跳转而来
                $postId = (int)$this->input('postId', 0);
                if ($postId > 0) {
                    $paidView = Db::name('fc_pay_view')
                        ->where('user_id', $me['id'])
                        ->where('post_id', $postId)
                        ->find();
                    if ($paidView) {
                        $unlocked = true;
                    }
                }
            }
        }

        $displayContact = $unlocked ? $rawContact : $this->maskPhone($rawContact);

        $data = [
            'id'              => (int)$m['id'],
            'userId'          => (int)$m['user_id'],
            'name'            => (string)$m['name'],
            'logo'            => (string)(isset($m['logo']) ? $m['logo'] : ''),
            'banner'          => (string)(isset($m['banner']) ? $m['banner'] : ''),
            'address'         => (string)(isset($m['address']) ? $m['address'] : ''),
            'lat'             => (isset($m['lat']) && $m['lat'] !== null && $m['lat'] !== '') ? (float)$m['lat'] : null,
            'lng'             => (isset($m['lng']) && $m['lng'] !== null && $m['lng'] !== '') ? (float)$m['lng'] : null,
            'contact'         => $displayContact,
            'unlocked'        => $unlocked,
            'category'        => (string)(isset($m['category']) ? $m['category'] : ''),
            'notice'          => (string)(isset($m['notice']) ? $m['notice'] : ''),
            'auditStatus'     => (int)$m['audit_status'],
            'verified'        => (int)$m['audit_status'] === 1,
            'licenseVerified' => !empty($m['license']) && (int)$m['audit_status'] === 1,
            'postCount'       => $postCount,
            'distance'        => $distance,
            'userNickname'    => $userNickname,
            'userAvatar'      => $userAvatar,
            'createdAt'       => isset($m['createtime']) ? $this->iso($m['createtime']) : '',
            'posts'           => $posts['list'],
            'hasMorePosts'    => $posts['hasMore'],
        ];

        $this->ok($data);
    }

    /**
     * M2 获取商家名下的信息列表（支持分页）
     * GET /api/v1/merchant/:id/posts
     *
     * @return void
     */
    public function posts()
    {
        $id = (int)$this->routeId();
        if ($id <= 0) {
            $id = (int)$this->input('id', 0) ?: (int)$this->input('userId', 0);
        }
        if ($id <= 0) {
            $this->fail('缺少商家参数', 400);
        }

        $userId = $id;
        $m = Db::name('fc_merchant')->where('id', $id)->find();
        if ($m) {
            $userId = (int)$m['user_id'];
        }

        list($page, $size) = $this->pager(10, 30);
        $res = $this->fetchMerchantPosts($userId, $page, $size);
        $this->ok($res);
    }

    /**
     * 查询指定商家的发帖列表统一组装
     *
     * @param int $userId 发布者用户ID
     * @param int $page 页码
     * @param int $size 每页数量
     * @return array
     */
    protected function fetchMerchantPosts($userId, $page, $size)
    {
        $q = Db::name('fc_post')
            ->where('user_id', $userId)
            ->where('status', 1)
            ->where('audit_status', 1)
            ->whereNull('deletetime');

        $total = (int)$q->count();
        $rows = Db::name('fc_post')
            ->where('user_id', $userId)
            ->where('status', 1)
            ->where('audit_status', 1)
            ->whereNull('deletetime')
            ->order('is_top desc, id desc')
            ->page($page, $size)
            ->select();

        $list = [];
        foreach ($rows as $r) {
            $catName = '';
            if (!empty($r['category_id'])) {
                $cat = Db::name('fc_category')->where('id', $r['category_id'])->value('name');
                $catName = $cat ? (string)$cat : '';
            }

            $cover = (string)$r['cover'];
            $mediaArr = $this->jsonArr($r['media']);
            if ($cover === '' && !empty($mediaArr)) {
                $cover = $mediaArr[0];
            }

            $tags = [];
            if (!empty($r['tags'])) {
                foreach (explode(',', (string)$r['tags']) as $t) {
                    $t = trim($t);
                    if ($t !== '') {
                        $tags[] = $t;
                    }
                }
            }

            $list[] = [
                'id'           => (int)$r['id'],
                'title'        => (string)$r['title'],
                'content'      => (string)$r['content'],
                'price'        => (float)$r['price'],
                'priceUnit'    => (string)$r['price_unit'],
                'cover'        => $cover,
                'media'        => $mediaArr,
                'area'         => (string)$r['area'],
                'address'      => (string)$r['address'],
                'categoryId'   => (int)$r['category_id'],
                'categoryName' => $catName,
                'isTop'        => (int)$r['is_top'] === 1,
                'views'        => (int)$r['views'],
                'commentCount' => (int)$r['comment_count'],
                'createdAt'    => $this->iso($r['createtime']),
                'tags'         => $tags,
            ];
        }

        return [
            'list'    => $list,
            'total'   => $total,
            'page'    => $page,
            'size'    => $size,
            'hasMore' => ($page * $size) < $total,
        ];
    }

    /**
     * 计算两点大地距离（单位 km，保留 1 位小数）
     *
     * @param float $lat1 纬度1
     * @param float $lng1 经度1
     * @param float $lat2 纬度2
     * @param float $lng2 经度2
     * @return float
     */
    protected function calcDistance($lat1, $lng1, $lat2, $lng2)
    {
        $earthRadius = 6378.137;
        $radLat1 = deg2rad($lat1);
        $radLat2 = deg2rad($lat2);
        $a = $radLat1 - $radLat2;
        $b = deg2rad($lng1) - deg2rad($lng2);
        $s = 2 * asin(sqrt(pow(sin($a / 2), 2) + cos($radLat1) * cos($radLat2) * pow(sin($b / 2), 2)));
        $s = $s * $earthRadius;
        return round($s, 1);
    }
}