<?php
// +----------------------------------------------------------------------
// | YwxApp [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2026-2036 http://ywxapp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Author: ywxapp<admin@ywxapp.cn>
// +----------------------------------------------------------------------
declare (strict_types = 1);

namespace addon\articles\controller\api;

// 注意：本类就叫 Article，模型必须起别名，否则「类名已被占用」致命错误
use addon\articles\model\Article as ArticleModel;
use addon\articles\model\ArticleCategory;
use addon\articles\model\ArticleComment;
use addon\articles\model\ArticleTag;
use think\facade\Cache;
use ywxapp\controller\ApiBase;
use ywxapp\service\AddonService;

/**
 * 文章CMS 对外 API
 *
 * 鉴权：继承 ApiBase（默认需登录）；列表/详情/分类/标签/搜索放行游客，
 * 评论必须登录（$noNeedLogin 未包含 comment）。
 *
 * URL：/articles/api/articles 等（见 route/app.php）
 */
class Article extends ApiBase
{
    /** 免登录方法（评论不在其中，必须登录） */
    protected $noNeedLogin = ['index', 'read', 'categories', 'tags', 'search'];

    /**
     * 文章列表
     * 参数：page / cid / tid
     */
    public function index()
    {
        $page = (int) input('page/d', 1);
        $cid  = (int) input('cid/d', 0);
        $tid  = (int) input('tid/d', 0);

        $where = [];
        if ($cid > 0) {
            $where['cid'] = $cid;
        }
        if ($tid > 0) {
            $where['tid'] = $tid;
        }

        $list = ArticleModel::listArticles($where, $page, $this->pageSize());

        $rows = [];
        foreach ($list->items() as $a) {
            $rows[] = [
                'id'            => $a->id,
                'title'         => $a->title,
                'summary'       => $a->summary,
                'cover_image'   => $a->cover_image,
                'cid'           => $a->cid,
                'category'      => $a->category_name ?? '',
                'view_count'    => (int) $a->view_count,
                'comment_count' => (int) $a->comment_count,
                'create_at'     => $a->create_at,
            ];
        }

        $this->apiSuccess($rows, 'success', $list->total());
    }

    /**
     * 文章详情（正文已在入库时做过白名单净化，可安全下发）
     */
    public function read($id = 0)
    {
        $id      = (int) ($id ?: input('id/d', 0));
        $article = ArticleModel::getDetail($id);

        if (!$article) {
            $this->apiError('文章不存在或已下线', 404, null, 404);
        }

        ArticleModel::where('id', $id)->inc('view_count')->update();

        $tags = [];
        foreach ($article->tags as $t) {
            $tags[] = ['id' => $t->id, 'name' => $t->name];
        }

        $this->apiSuccess([
            'id'            => $article->id,
            'title'         => $article->title,
            'content'       => $article->content,
            'summary'       => $article->summary,
            'cover_image'   => $article->cover_image,
            'author'        => $article->author,
            'cid'           => $article->cid,
            'category'      => $article->category_name ?? '',
            'view_count'    => (int) $article->view_count,
            'comment_count' => (int) $article->comment_count,
            'create_at'     => $article->create_at,
            'tags'          => $tags,
        ]);
    }

    /**
     * 分类列表
     */
    public function categories()
    {
        $rows = [];
        foreach (ArticleCategory::allEnable() as $c) {
            $rows[] = [
                'id'          => $c->id,
                'name'        => $c->name,
                'alias'       => $c->alias,
                'description' => $c->description,
            ];
        }
        $this->apiSuccess($rows, 'success', count($rows));
    }

    /**
     * 标签列表
     */
    public function tags()
    {
        $rows = [];
        foreach (ArticleTag::where('delete_at', 0)->order('id', 'desc')->select() as $t) {
            $rows[] = ['id' => $t->id, 'name' => $t->name, 'alias' => $t->alias];
        }
        $this->apiSuccess($rows, 'success', count($rows));
    }

    /**
     * 搜索
     */
    public function search()
    {
        $keyword = trim((string) input('keyword/s', ''));
        $page    = (int) input('page/d', 1);

        $list = ArticleModel::listArticles(['keyword' => $keyword], $page, $this->pageSize());

        $rows = [];
        foreach ($list->items() as $a) {
            $rows[] = [
                'id'      => $a->id,
                'title'   => $a->title,
                'summary' => $a->summary,
                'cid'     => $a->cid,
                'category' => $a->category_name ?? '',
                'create_at' => $a->create_at,
            ];
        }

        $this->apiSuccess($rows, 'success', $list->total());
    }

    /**
     * 发表评论（需登录）
     */
    public function comment()
    {
        $aid     = (int) input('aid/d', 0);
        $content = trim((string) input('content/s', ''));

        if ($aid <= 0 || $content === '') {
            $this->apiError('参数错误');
        }

        $len = mb_strlen($content, 'UTF-8');
        if ($len < 2) {
            $this->apiError('评论内容太短');
        }
        if ($len > 500) {
            $this->apiError('评论内容不能超过 500 字');
        }

        // 目标文章必须存在且已发布
        $article = ArticleModel::where('id', $aid)->where('status', 1)->where('delete_at', 0)->find();
        if (!$article) {
            $this->apiError('文章不存在或未发布');
        }

        $cfg       = AddonService::config('articles');
        $needAudit = !empty($cfg['comment_audit']);
        $interval  = max(0, (int) ($cfg['comment_interval'] ?? 10));

        $uid     = (int) $this->uid();
        $lockKey = 'articles_comment_lock:' . $uid;
        if ($interval > 0 && Cache::get($lockKey, 0)) {
            $this->apiError('评论太频繁，请稍后再试');
        }

        ArticleComment::create([
            'uid'        => $uid,
            'aid'        => $aid,
            'pid'        => 0,
            'content'    => $content,
            'status'     => $needAudit ? 0 : 1,
            'ip'         => (string) $this->request->ip(),
            'user_agent' => mb_substr((string) $this->request->header('user-agent', ''), 0, 255),
            'create_at'  => time(),
            'update_at'  => time(),
        ]);

        if (!$needAudit) {
            ArticleModel::where('id', $aid)->inc('comment_count')->update();
        }
        if ($interval > 0) {
            Cache::set($lockKey, 1, $interval);
        }

        $this->apiSuccess(null, $needAudit ? '评论已提交，等待审核' : '评论成功');
    }

    /**
     * 每页条数（取自插件配置）
     */
    private function pageSize(): int
    {
        $cfg = AddonService::config('articles');
        $size = (int) ($cfg['page_size'] ?? 10);
        return $size > 0 ? min($size, 50) : 10;
    }
}