<?php

namespace app\api\controller;

use think\Db;

/**
 * 用户端 · 个人主页与用户详情（Module-USER）
 * 路由：
 *   GET /api/v1/user/:id         U1 个人主页公开信息
 *   GET /api/v1/user/:id/posts   U2 个人发布的信息流（分页）
 */
class User extends V1
{
    /**
     * U1 获取用户公开档案与发帖概况
     * GET /api/v1/user/:id
     * 规则：允许游客查询；若用户是认证商家，带出对应关联的商家门店ID
     *
     * @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('缺少用户参数', 400);
        }

        $user = Db::name('user')->where('id', $id)->find();
        if (!$user) {
            $this->fail('用户不存在', 404);
        }

        $ext = Db::name('fc_user_ext')->where('user_id', $id)->find();
        $merchant = Db::name('fc_merchant')->where('user_id', $id)->find();
        $isMerchant = $merchant && (int)$merchant['audit_status'] === 1;

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

        // 判定当前查看者是否已关注该用户
        $followed = false;
        $me = $this->user();
        if ($me && (int)$me['id'] !== $id) {
            $followed = (bool)Db::name('fc_follow')
                ->where('user_id', $me['id'])
                ->where('target_user_id', $id)
                ->find();
        }

        // 首屏拉取前 6 条该用户的有效发帖
        $posts = $this->fetchUserPosts($id, 1, 6);

        $data = [
            'id'           => (int)$user['id'],
            'nickname'     => (string)$user['nickname'],
            'avatar'       => (string)$user['avatar'],
            'isMerchant'   => $isMerchant,
            'merchantId'   => $merchant ? (int)$merchant['id'] : 0,
            'merchantName' => $merchant ? (string)$merchant['name'] : '',
            'postCount'    => $postCount,
            'followed'     => $followed,
            'isSelf'       => $me ? ((int)$me['id'] === $id) : false,
            'createdAt'    => $this->iso($user['createtime']),
            'posts'        => $posts['list'],
            'hasMorePosts' => $posts['hasMore'],
        ];

        $this->ok($data);
    }

    /**
     * U2 分页获取该用户发布的信息流
     * GET /api/v1/user/: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('缺少用户参数', 400);
        }

        list($page, $size) = $this->pager(10);
        $res = $this->fetchUserPosts($id, $page, $size);
        $this->ok($res);
    }

    /**
     * 查询指定用户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 $size 每页数量
     * @return array
     */
    protected function fetchUserPosts($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'])->find();
                $catName = $cat ? (string)$cat['name'] : '';
            }
            $cover = trim((string)$r['cover']);
            $media = json_decode((string)$r['media'], true);
            $mediaList = is_array($media) ? array_values(array_filter($media)) : [];
            if ($cover === '' && !empty($mediaList)) {
                $cover = $mediaList[0];
            }
            $tags = [];
            if (!empty($r['tags'])) {
                $tags = array_values(array_filter(array_map('trim', explode(',', (string)$r['tags']))));
            }

            $list[] = [
                'id'           => (int)$r['id'],
                'title'        => (string)$r['title'],
                'content'      => (string)$r['content'],
                'price'        => (float)$r['price'],
                'priceUnit'    => (string)$r['price_unit'],
                'cover'        => $cover,
                'media'        => $mediaList,
                'area'         => (string)$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,
        ];
    }
}