<?php
/**
 * 商业使用授权协议
 * 
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 * 
 * 本软件仅供评估使用。任何商业用途必须获得书面授权许可。
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 * 
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 * 
 * 评估用户须知:
 * 1. 禁止移除版权声明
 * 2. 禁止用于生产环境
 * 3. 禁止转售或分发
 */

/**
 *	资源下载控制器
 */
namespace app\index\controller;
use app\index\controller\BaseController;
use think\facade\Db;
use think\facade\View;
use think\facade\Request;
use app\index\model\Resources\Resources;
use app\index\model\Resources\ResourcesCategory;
use app\index\model\Attachments;
use app\index\model\Users;
use app\index\model\Articles\Articles;

class ResourcesController extends BaseController
{
    //资源中心
    public function index()
    {
        // 获取所有顶级分类
        $parentCategories = ResourcesCategory::where('cid', 0)
            ->where('status', 1)
            ->order('sort', 'asc')
            ->select();

        // 获取每个顶级分类下的子分类
        $categories = [];
        foreach ($parentCategories as $parent) {
            $subCategories = ResourcesCategory::where('cid', $parent->id)
                ->where('status', 1)
                ->order('sort', 'asc')
                ->select();

            // 获取每个子分类下的资源数量
            foreach ($subCategories as &$subCategory) {
                $subCategory['resource_count'] = Resources::where('cate', $subCategory->id)
                    ->where('status', 1)
                    ->count();
            }

            $categories[] = [
                'parent' => $parent,
                'subCategories' => $subCategories
            ];
        }

        // 将数据传递给视图
        View::assign('categories', $categories);

        return View::fetch();
    }

    // 资源列表页
    public function list()
    {
        $cid = input('cid/d', 0);
        $page = input('page/d', 1);

        // 获取分类信息
        $category = ResourcesCategory::where('id', $cid)
            ->where('status', 1)
            ->find();

        if (!$category) {
            $this->error('分类不存在');
        }

        // 获取该分类下的资源，带分页
        $resources = Resources::where('cate', $cid)
            ->where('status', 1)
            ->order('sort', 'asc')
            ->paginate([
                'list_rows' => 20,
                'page' => $page,
                'query' => Request::instance()->param()
            ]);

        // 将数据传递给视图
        View::assign('category', $category);
        View::assign('data', $resources);
        View::assign('page', $resources->render()); // 新增这一行

        return View::fetch('list');
    }

    // 资源详情页
    public function detail()
    {
        $id = Request::param('id/d', 0);
        $resources = Resources::where('id', $id)->find();

        if (!$resources) {
            return json(['code' => 0, 'msg' => '资源不存在或已被删除']);
        }

        // 如果size没有，从附件表中获取
        if (empty($resources['size']) && !empty($resources['fileurl'])) {
            $attachment = Attachments::where('src', $resources['fileurl'])
                ->find();

            if ($attachment && !empty($attachment['size'])) {
                $size = $attachment['size'];
                // 转换文件大小为合适的单位
                if ($size >= 1073741824) { // 1GB = 1024MB = 1024*1024KB = 1024*1024*1024B
                    $resources['size'] = round($size / 1073741824, 2) . 'GB';
                } elseif ($size >= 1048576) { // 1MB = 1024KB = 1024*1024B
                    $resources['size'] = round($size / 1048576, 2) . 'MB';
                } else {
                    $resources['size'] = round($size / 1024, 2) . 'KB';
                }
            }
        }

        // 获取分类名称
        $cateName = ResourcesCategory::where('id', $resources['cate'])
            ->value('name');

        // 获取作者信息
        $authorInfo = Users::where('name', $resources['uploader'])->find();
        // var_dump($authorInfo);
        if ($authorInfo) {
            // 统计作者的文章数
            $resourcesCount = Articles::where('author', $resources['uploader'])->count();
            // 统计作者的资源数
            $resourceCount = Resources::where('uploader', $resources['uploader'])->count();

            $authorData = [
                'avatar' => $authorInfo['avatar'] ?: '/static/images/avatar.png',
                'name' => $authorInfo['name'],
                'resource_count' => $resourceCount,
                'article_count' => $resourcesCount
            ];
        } else {
            $authorData = [
                'avatar' => '/static/images/avatar.png',
                'name' => $resources['author'],
                'resource_count' => 0,
                'article_count' => 0
            ];
        }

        // 获取上一个和下一个资源
        $prevResources = Resources::where('id', '<', $id)
            ->where('delete_time', null)
            ->where('status', 1)
            ->where('cate', $resources['cate'])
            ->field(['id', 'title'])
            ->order('id DESC')
            ->find();

        $nextResources = Resources::where('id', '>', $id)
            ->where('delete_time', null)
            ->where('status', 1)
            ->where('cate', $resources['cate'])
            ->field(['id', 'title'])
            ->order('id ASC')
            ->find();

        // 获取相关资源（同分类的其他资源）
        $relatedResourcess = Db::table('yz_resources')
            ->alias('g')
            ->join('yz_resources_category c', 'g.cate = c.id')
            ->where('g.cate', $resources['cate'])
            ->where('g.id', '<>', $id)
            ->where('g.delete_time', null)
            ->where('g.status', 1)
            ->field([
                'g.id',
                'g.title',
                'IF(g.icon IS NULL OR g.icon = "", c.icon, g.icon) as icon'
            ])
            ->order('g.id DESC')
            ->limit(5)
            ->select()
            ->toArray();

        // 如果是 AJAX 请求，返回 JSON 数据
        if (Request::isAjax()) {
            return json([
                'code' => 1,
                'msg' => '获取成功',
                'data' => [
                    'resources' => $resources,
                    'cateName' => $cateName,
                    'prevResources' => $prevResources,
                    'nextResources' => $nextResources,
                    'relatedResourcess' => $relatedResourcess
                ]
            ]);
        }

        // 非 AJAX 请求返回视图
        View::assign([
            'resources' => $resources,
            'cateName' => $cateName,
            'authorInfo' => $authorData,
            'prevResources' => $prevResources,
            'nextResources' => $nextResources,
            'relatedResourcess' => $relatedResourcess
        ]);

        return View::fetch('detail');
    }

    // 资源下载
    public function downloadurl()
    {
        if (!Request::isAjax()) {
            return json(['code' => 0, 'msg' => '非法请求']);
        }

        $id = Request::param('id/d', 0);

        // 获取资源信息
        $resources = Resources::where('id', $id)
            ->where('delete_time', null)
            ->find();

        if (!$resources) {
            return json(['code' => 0, 'msg' => '资源不存在']);
        }

        // 更新下载次数
        $result = Resources::where('id', $id)
            ->where('delete_time', null)
            ->inc('downloads', 1)
            ->update();

        if ($result) {
            return json([
                'code' => 1,
                'msg' => '下载成功',
                'data' => [
                    'url' => $resources['url']
                ]
            ]);
        } else {
            return json(['code' => 0, 'msg' => '下载失败']);
        }
    }

    // 获取访问统计
    public function viewStats()
    {
        $id = Request::param('id/d', 0);

        // 获取总访问量
        $totalViews = Resources::where('id', $id)
            ->value('views');

        return json([
            'code' => 1,
            'data' => [
                'total' => $totalViews
            ]
        ]);
    }

    /**
     * 更新资源访问次数
     */
    public function updateViews()
    {
        if (!Request::isPost()) {
            return json(['code' => 0, 'msg' => '非法请求']);
        }

        $id = Request::post('id');
        if (!$id) {
            return json(['code' => 0, 'msg' => '参数错误']);
        }

        try {
            // 更新访问次数
            $resources = Resources::where('id', $id)->find();
            if (!$resources) {
                return json(['code' => 0, 'msg' => '资源不存在']);
            }

            // 更新访问次数
            Resources::where('id', $id)->inc('views')->update();

            // 获取更新后的访问次数
            $newViews = Resources::where('id', $id)->value('views');

            return json(['code' => 1, 'msg' => '更新成功', 'data' => ['views' => $newViews]]);
        } catch (\Exception $e) {
            return json(['code' => 0, 'msg' => '更新失败：' . $e->getMessage()]);
        }
    }
}