<?php

declare(strict_types=1);

namespace addon\download\controller\backend;

use think\exception\ValidateException;
use think\facade\Db;
use addon\download\model\Resource as ResourceModel;
use addon\download\model\Category as CategoryModel;
use ywxapp\controller\BackendBase;
class Resource extends BackendBase
{
    protected $noNeedVerify = ['*']; 

    protected function initialize()
    {
        $this->model = new ResourceModel();
    }

    public function index()
    {
        if ($this->request->isAjax()) {
            $title  = $this->request->param('title', '');
            $cid    = $this->request->param('cid/d', 0);
            $page   = $this->request->param('page/d', 1);
            $limit  = $this->request->param('limit/d', 20);
            $data   = $this->model
                ->with(['category'])
                ->when($title, fn($q, $t) => $q->whereLike('title', "%{$t}%"))
                ->when($cid, fn($q, $c) => $q->where('cid', $c))
                ->order('id', 'desc')
                ->paginate(['page' => $page, 'list_rows' => $limit]);
            $this->result->setCount($data->total());
            $this->result->success($data->items());
        }
        $categories = (new CategoryModel())
            ->where('status', 1)
            ->order('sort', 'desc')
            ->select();
        $this->view->assign('categories', $categories);
        return $this->view->fetch('resource/index');
    }

    public function create()
    {
        if ($this->request->isAjax()) {
            $categories = (new CategoryModel())
                ->where('status', 1)
                ->order('sort', 'desc')
                ->select();
            $this->result->success(['categories' => $categories]);
        }
    }

    public function save()
    {
        if ($this->request->isPost()) {
            $params = $this->request->post();
            $this->validateSave($params);
            Db::startTrans();
            try {
                $this->model->save($params);
                Db::commit();
                $this->result->success($this->model, '保存成功');
            } catch (\Exception $e) {
                Db::rollback();
                $this->result->error('保存失败: ' . $e->getMessage());
            }
        }
    }

    public function edit($id = null)
    {
        $id    = $this->request->param('id');
        $model = $this->model->find($id);
        if (!$model) {
            $this->result->error('数据不存在');
        }
        if ($this->request->isAjax()) {
            $categories = (new CategoryModel())
                ->where('status', 1)
                ->order('sort', 'desc')
                ->select();
            $this->result->success(['categories' => $categories, 'info' => $model]);
        }
    }

    public function update()
    {
        $id = $this->request->param('id');
        if ($this->request->isAjax() && $this->request->isPut()) {
            $params = $this->request->param();
            $this->validateSave($params);
            Db::startTrans();
            try {
                $model = $this->model->find($id);
                if (!$model) {
                    throw new ValidateException('数据不存在');
                }
                $model->save($params);
                Db::commit();
                $this->result->success($model, '更新成功');
            } catch (\Exception $e) {
                Db::rollback();
                $this->result->error('更新失败: ' . $e->getMessage());
            }
        }
    }

    public function delete()
    {
        if ($this->request->isAjax() && $this->request->isDelete()) {
            $ids = $this->request->param('ids', '');
            if (empty($ids)) {
                $this->result->error('请选择要删除的数据');
            }
            try {
                Db::transaction(function () use ($ids) {
                    $this->model->destroy($ids);
                });
                $this->result->success();
            } catch (\think\exception\HttpResponseException $e) {
                throw $e;
            } catch (\Throwable $th) {
                $this->result->error('删除失败: ' . $th->getMessage());
            }
        }
    }

    protected function validateSave(array $params): void
    {
        if (empty($params['title'])) {
            throw new ValidateException('资源标题不能为空');
        }
        if (empty($params['cid'])) {
            throw new ValidateException('请选择分类');
        }
    }
}