<?php

declare(strict_types=1);

namespace addon\download\controller;

use think\facade\Config;
use think\facade\Lang;
use think\facade\Cookie;
use think\Response;
use ywxapp\controller\FrontendBase;
use addon\download\model\Category;
use addon\download\model\Resource;
use addon\download\service\DownloadService;

class Index extends FrontendBase
{
    protected $noNeedLogin = ['*'];
    protected $noNeedVerify = ['*'];

    public function initialize()
    { 
        // 多语言：支持 ?lang=zh-cn|en-us 切换并写 cookie；插件级 lang 显式加载兜底
        $lang = $this->request->param('lang', '');
        if (in_array($lang, ['zh-cn', 'en-us'], true)) {
            Lang::setLangSet($lang);
            Cookie::set('download_lang', $lang);
        } elseif ($cookie = Cookie::get('download_lang')) {
            Lang::setLangSet($cookie);
        }
        

        // 固定页面文案注入模板
        $this->view->assign([
            'site_name'          => lang('site_name'),
            'all_category_text'  => lang('all_category'),
            'hot_text'           => lang('hot'),
            'latest_text'        => lang('latest'),
            'list_text'          => lang('list'),
            'detail_text'        => lang('detail'),
            'search_text'        => lang('search'),
            'search_placeholder' => lang('search_placeholder'),
            'download_btn_text'  => lang('download_btn'),
        ]);

        // 插件前台接入「全站动态布局」：视图只写正文，由核心 frontend 的
        // common/layout.html 包裹全站 header / footer（与开发文档约定一致）。
        // 注意：layout_name 必须带 .html 扩展名，否则 think-template 的
        // parseTemplateFile() 会把无扩展名的绝对路径里的盘符冒号（D:）当成
        // 模板分隔符替换成当前 viewPath，导致「模板文件不存在」。
        $this->view->config([
            'layout_on'   => true,
            'layout_name' => $this->app->getRootPath() . 'app' . DIRECTORY_SEPARATOR
                . 'frontend' . DIRECTORY_SEPARATOR . 'view' . DIRECTORY_SEPARATOR
                . 'common' . DIRECTORY_SEPARATOR . 'layout.html',
        ]);
    }

    /**
     * 读取本插件配置（运行时由 AppInit 注入 config('download')）
     */
    protected function pluginConfig(): array
    {
        return Config::get('download', []);
    }

    /**
     * 首页：分类导航 + 热门/最新（按 config 开关）
     */
    public function index()
    {
        $cfg = $this->pluginConfig();

        $categories = Category::with(['resources' => function ($q) {
            $q->order('downloads', 'desc')->limit(8);
        }])
            ->where('pid', 0)
            ->where('status', 1)
            ->order('sort', 'desc')
            ->select();

        $hot  = [];
        $news = [];
        if (!empty($cfg['show_hot'])) {
            $hot = Resource::scope('visible')->order('downloads', 'desc')->limit(10)->select();
        }
        if (!empty($cfg['show_new'])) {
            $news = Resource::scope('visible')->order('id', 'desc')->limit(10)->select();
        }

        $this->view->assign('categories', $categories);
        $this->view->assign('hot', $hot);
        $this->view->assign('news', $news);
        $this->view->assign('config', $cfg);
        return $this->view->fetch();
    }

    /**
     * 分类列表页
     */
    public function list()
    {
        $cid  = $this->request->param('cid/d', 0);
        $page = $this->request->param('page/d', 1);
        $cfg  = $this->pluginConfig();
        $size = (int)($cfg['page_size'] ?? 20);

        $cat = $cid ? Category::find($cid) : null;
        if ($cid && !$cat) {
            $this->error('分类不存在');
        }

        $list = Resource::scope('visible');
        if ($cid) {
            $list = $list->where('cid', $cid);
        }
        $list = $list->order('downloads', 'desc')
            ->paginate(['page' => $page, 'list_rows' => $size]);

        $this->view->assign('cat', $cat);
        $this->view->assign('list', $list);
        $this->view->assign('pager', $list->render());
        $this->view->assign('config', $cfg);
        return $this->view->fetch();
    }

    /**
     * 详情页
     */
    public function detail()
    {
        $id = $this->request->param('id/d', 0);
        $resource = Resource::scope('visible')->find($id);
        if (!$resource) {
            $this->error('资源不存在或已下架');
        }

        // 查看计数（防刷交给 service 内的简单锁，此处仅点击+1）
        DownloadService::incClicks($id);

        $cat = $resource['cid'] ? Category::find($resource['cid']) : null;

        $this->view->assign('resource', $resource);
        $this->view->assign('cat', $cat);
        $this->view->assign('config', $this->pluginConfig());
        return $this->view->fetch();
    }

    /**
     * 搜索
     */
    public function search()
    {
        $q    = $this->request->param('q', $this->request->param('kw', ''));
        $page = $this->request->param('page/d', 1);
        $cfg  = $this->pluginConfig();
        $size = (int)($cfg['page_size'] ?? 20);

        $list = Resource::scope('visible');
        if ($q) {
            $list = $list->whereLike('title', "%{$q}%");
        }
        $list = $list->order('downloads', 'desc')
            ->paginate(['page' => $page, 'list_rows' => $size]);

        $this->view->assign('keyword', $q);
        $this->view->assign('list', $list);
        $this->view->assign('pager', $list->render());
        $this->view->assign('config', $cfg);
        return $this->view->fetch();
    }

    /**
     * 触发下载：外链 302 跳转 / 本地文件流式输出
     */
    public function down()
    {
        $id = $this->request->param('id/d', 0);
        $ip = $this->request->ip();
        try {
            $ret = DownloadService::dispatch($id, $ip);
        } catch (\think\Exception $e) {
            $this->error($e->getMessage());
            return;
        }

        if ($ret['type'] === 'redirect') {
            return redirect($ret['url']);
        }

        // 本地文件流式输出（避免大文件占用内存）
        $path = $ret['path'];
        $name = ($ret['name'] ?? 'download') . '.' . pathinfo($path, PATHINFO_EXTENSION);
        return Response::create()->data(file_get_contents($path))->header([
            'Content-Type'        => 'application/octet-stream',
            'Content-Disposition' => 'attachment; filename="' . rawurlencode($name) . '"',
            'Content-Length'      => filesize($path),
        ]);
    }
}