<?php
/**
 *	程序下载控制器
 */
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;

class ProgramController extends BaseController
{
    // 程序列表页
    public function list()
    {
        // 获取分类ID
        $cateId = Request::param('cate/d', 0);

        // 构建查询条件
        $where = [
            ['delete_time', '=', null],
            ['status', '=', 1]
        ];

        if ($cateId > 0) {
            $where[] = ['cate', '=', $cateId];
        }

        // 获取程序列表
        $programs = Resources::where($where)
            ->order('id DESC')
            ->paginate([
                'list_rows' => 10,
                'query' => Request::param()
            ]);

        // 获取分类信息
        $category = null;
        if ($cateId > 0) {
            $category = ResourcesCategory::where('id', $cateId)
                ->where('delete_time', null)
                ->where('status', 1)
                ->find();
        }

        // 获取所有分类
        $categories = ResourcesCategory::where('delete_time', null)
            ->where('status', 1)
            ->select()
            ->toArray();

        // 将变量传递给视图
        View::assign([
            'programs' => $programs,
            'category' => $category,
            'categories' => $categories
        ]);

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

    // 程序详情页
    public function detail()
    {
        $id = Request::param('id/d', 0);
        $program = Resources::where('id', $id)->find();
        
        if (!$program) {
            return json(['code' => 0, 'msg' => '程序不存在或已被删除']);
        }
        
        // 如果size没有，从附件表中获取
        if (empty($program['size']) && !empty($program['fileurl'])) {
            $attachment = Attachments::where('src', $program['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
                    $program['size'] = round($size / 1073741824, 2) . 'GB';
                } elseif ($size >= 1048576) { // 1MB = 1024KB = 1024*1024B
                    $program['size'] = round($size / 1048576, 2) . 'MB';
                } else {
                    $program['size'] = round($size / 1024, 2) . 'KB';
                }
            }
        }

        // 如果size存在，确保转换为合适的单位
        if (!empty($program['size']) && is_numeric($program['size'])) {
            $size = $program['size'];
            if ($size >= 1073741824) {
                $program['size'] = round($size / 1073741824, 2) . 'GB';
            } elseif ($size >= 1048576) {
                $program['size'] = round($size / 1048576, 2) . 'MB';
            } else {
                $program['size'] = round($size / 1024, 2) . 'KB';
            }
        }

        // 获取分类名称
        $cateName = ResourcesCategory::where('id', $program['cate'])
            ->value('name');
        
        // 获取上一个和下一个程序
        $prevProgram = Resources::where('id', '<', $id)
            ->where('delete_time', null)
            ->where('status', 1)
            ->order('id DESC')
            ->find();
            
        $nextProgram = Resources::where('id', '>', $id)
            ->where('delete_time', null)
            ->where('status', 1)
            ->order('id ASC')
            ->find();
            
        // 获取相关程序（同分类的其他程序）
        $relatedPrograms = Db::table('yz_resources')
            ->alias('p')
            ->join('yz_resources_category c', 'p.cate = c.id')
            ->where('p.cate', $program['cate'])
            ->where('p.id', '<>', $id)
            ->where('p.delete_time', null)
            ->where('p.status', 1)
            ->field([
                'p.id',
                'p.title',
                'p.desc',
                'IF(p.icon IS NULL OR p.icon = "", c.icon, p.icon) as icon'
            ])
            ->order('p.id DESC')
            ->limit(3)
            ->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' => [
                    'program' => $program,
                    'cateName' => $cateName,
                    'prevProgram' => $prevProgram,
                    'nextProgram' => $nextProgram,
                    'relatedPrograms' => $relatedPrograms
                ]
            ]);
        }
            
        // 非 AJAX 请求返回视图
        View::assign([
            'program' => $program,
            'cateName' => $cateName,
            'prevProgram' => $prevProgram,
            'nextProgram' => $nextProgram,
            'relatedPrograms' => $relatedPrograms
        ]);

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

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

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

        // 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']);
        } 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
            ]
        ]);
    }

    /**
     * 更新程序访问次数
     */
    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
            $program = Resources::where('id', $id)->find();
            if (!$program) {
                return json(['code' => 0, 'msg' => '程序不存在']);
            }

            // 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()]);
        }
    }
}