<?php
// +----------------------------------------------------------------------
// | YwxApp [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | 文章CMS后台分类管理
// +----------------------------------------------------------------------
declare(strict_types=1);

namespace addon\articles\controller\backend;

use think\facade\Cache;
use think\facade\Request;
use think\facade\View;
use think\Validate;
use ywxapp\controller\BackendBase;
use addon\articles\model\ArticleCategory;
use addon\articles\library\ArticleSchema;

class Category extends BackendBase
{
    
    /**
     * Summary of needLogin
     * @var array
     */
    protected $noNeedLogin = [];

    /**
     * Summary of needRight
     * @var array
     */
    protected $noNeedVerify = [];

    protected function initialize()
    {
        parent::initialize();
        ArticleSchema::ensure();
    }
 
    /**
     * 显示资源列表
     *
     * @param  \think\Request  $request
     * @return \think\Response
     */
    public function index()
    {
        $page = $this->request->param('page', 1);
        $size = $this->request->param('size', 15);
        if ($this->request->isAjax()) {
            $data = ArticleCategory::paginate([
                'page'      => $page,
                'list_rows' => $size,
            ]);
            // 必须回传 count，否则 layui 表格分页失效
            return json(['code' => 0, 'msg' => '', 'count' => $data->total(), 'data' => $data->items()]);
        }
        return $this->view->fetch('category/index');
    }

    public function save()
    {
        if (Request::isPost()) {
            return $this->update(0);
        }
        // GET：渲染新增表单（原实现无返回值，会输出空白页）
        return View::fetch('category/edit', ['category' => null]);
    }

    public function edit($id = null)
    {
        $category = ArticleCategory::find($id);
        if (!$category) {
            return redirect((string) url('articles/backend/category/index'));
        }
        return View::fetch('category/edit', ['category' => $category]);
    }

    public function update($id = 0)
    {
        $data = Request::post();
        $id   = $id ?: (int) ($data['id'] ?? 0);
        $data['update_at'] = time();
        $data['status'] = isset($data['status']) ? 1 : 0;

        $validate = new Validate([
            'name|名称' => 'require|max:50',
            'alias|别名' => 'require|max:50',
        ]);
        if (!$validate->check($data)) {
            return json(['code' => 0, 'msg' => $validate->getError()]);
        }

        // 字段白名单（category 表实际列）
        $allow = ['name', 'alias', 'description', 'cover', 'sort', 'status', 'create_at', 'update_at'];

        try {
            if ($id) {
                $category = ArticleCategory::find($id);
                if (!$category) {
                    return json(['code' => 0, 'msg' => '分类不存在']);
                }
                $category->allowField($allow)->save($data);
            } else {
                $data['create_at'] = time();
                ArticleCategory::create($data, $allow);
            }
        } catch (\Throwable $e) {
            // alias 上有唯一键 uk_alias，重复会抛异常，转友好提示
            return json(['code' => 0, 'msg' => '保存失败：别名可能已存在']);
        }

        // 前台侧边栏分类有 5 分钟缓存，写操作后立即失效
        Cache::delete('articles:categories');

        return json([
            'code' => 1,
            'msg'  => '保存成功',
            'url'  => (string) url('articles/backend/category/index'),
        ]);
    }

    public function delete($id = 0)
    {
        $id = $id ?: (int) Request::post('id', 0);
        $category = ArticleCategory::find($id);
        if ($category) {
            if (ArticleCategory::hasArticles($id)) {
                return json(['code' => 0, 'msg' => '该分类下还有文章，无法删除']);
            }
            $category->delete();
            Cache::delete('articles:categories');
            return json(['code' => 1, 'msg' => '已删除']);
        }
        return json(['code' => 0, 'msg' => '分类不存在']);
    }
}