<?php

namespace App\Http\Resources;

use Illuminate\Http\Resources\Json\JsonResource;
use Illuminate\Support\Facades\Log;
use Illuminate\Support\Str;

use App\Models\CourseMember;
use App\Models\Course;
use App\Models\Collection;
use App\Models\ArticleCollection;
use App\Models\Channel;

use App\Http\Controllers\ArticleController;

use App\Http\Api\MdRender;
use App\Http\Api\UserApi;
use App\Http\Api\StudioApi;
use App\Http\Api\AuthApi;
use App\Http\Api\ChannelApi;


class ArticleResource extends JsonResource
{
    /**
     * Transform the resource into an array.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return array|\Illuminate\Contracts\Support\Arrayable|\JsonSerializable
     */
    public function toArray($request)
    {
        $data = [
            "uid" => $this->uid,
            "title" => $this->title,
            "subtitle" => $this->subtitle,
            "summary" => $this->summary,
            "studio" => StudioApi::getById($this->owner),
            "editor" => UserApi::getById($this->editor_id),
            "status" => $this->status,
            "lang" => $this->lang,
            "parent_uid" => $this->parent,
            "created_at" => $this->created_at,
            "updated_at" => $this->updated_at,
        ];

        $user = AuthApi::current($request);
        if ($user) {
            $canEdit = ArticleController::userCanEdit($user['user_uid'], $this);
            if ($canEdit) {
                $data['role'] = 'editor';
            }
        }

        //查询该文章在哪些文集中出现
        $collectionCount = ArticleCollection::where('article_id', $this->uid)->count();
        if ($collectionCount > 0) {
            $data['anthology_count'] = $collectionCount;
            $collection = ArticleCollection::where('article_id', $this->uid)->first();
            $data['anthology_first'] = Collection::find($collection->collect_id);
        }
        if ($request->has('anthology') && Str::isUuid($request->input('anthology'))) {
            $anthology = Collection::where('uid', $request->input('anthology'))->first();
        }
        //渲染简化版标题
        $channels = [];
        if ($request->has('channel')) {
            //有channel
            $channels = explode('_', $request->input('channel'));
        } else if (isset($anthology) && $anthology && !empty($anthology->default_channel)) {
            //没有channel,使用文集channel
            $channels[] = $anthology->default_channel;
        }
        $mdRender = new MdRender(['format' => 'simple']);

        //path
        if ($request->has('anthology') && Str::isUuid($request->input('anthology'))) {
            $data['path'] = array();
            if (isset($anthology) && $anthology) {
                $data['path'][] = [
                    'key' => $anthology->uid,
                    'title' => $anthology->title,
                    'level' => 0
                ];
            }

            $currLevel = -1;
            $aList = ArticleCollection::where('collect_id', $request->input('anthology'))
                ->orderBy('id', 'desc')
                ->select(['article_id', 'title', 'level'])->get();
            $path = array();
            foreach ($aList as $article) {
                if (
                    $article->article_id === $this->uid ||
                    ($currLevel >= 0 && $article->level < $currLevel)
                ) {
                    $currLevel = $article->level;
                    $path[] = [
                        'key' => $article->article_id,
                        'title' => $mdRender->convert($article->title, $channels),
                        'level' => $article->level
                    ];
                }
            }
            for ($i = count($path) - 1; $i >= 0; $i--) {
                $data['path'][] = $path[$i];
            }

            //下级目录
            $level = -1;
            $subToc = array();
            for ($i = count($aList) - 1; $i >= 0; $i--) {
                $article = $aList[$i];
                if ($level >= 0) {
                    if ($article->level > $level) {
                        $subToc[] = [
                            "key" => $article->article_id,
                            "title" => $mdRender->convert($article->title, $channels),
                            "level" => $article->level
                        ];
                    } else {
                        break;
                    }
                }
                if ($article->article_id === $this->uid) {
                    $level = $article->level;
                }
            }
            $data['toc'] = $subToc;
        }


        $data['title_text'] = $mdRender->convert($this->title, $channels);

        //render html
        $channels = array();
        if (isset($this->content) && !empty($this->content)) {
            if ($request->has('channel')) {
                $channels = explode('_', $request->input('channel'));
            } else if ($request->has('anthology')) {
                $defaultChannel = Collection::where('uid', $request->input('anthology'))
                    ->value('default_channel');
                if ($defaultChannel) {
                    $channels[] = $defaultChannel;
                }
            }
            if (count($channels) === 0) {
                //查找用户默认channel
                $studioChannel = Channel::where('owner_uid', $this->owner)
                    ->where('type', 'translation')
                    ->get();
                if ($studioChannel) {
                    $channelId = $studioChannel[0]->uid;
                    $channels = [$channelId];
                } else {
                    $channelId = ChannelApi::getSysChannel(
                        '_community_translation_' . strtolower($this->lang) . '_',
                        '_community_translation_en_'
                    );
                    if ($channelId) {
                        $channels = [$channelId];
                    }
                }
            }
            $data["content"] = $this->content;
            $data["content_type"] = $this->content_type;
            $query_id = null;
            if ($request->has('course')) {
                if ($request->has('exercise')) {
                    $query_id = $request->input('exercise');
                    if ($request->has('user')) {
                        /**
                         * 显示指定用户作业
                         * 查询用户在课程中的channel
                         */
                        $userId = UserApi::getIdByName($request->input('user'));

                        $userInCourse = CourseMember::where('course_id', $request->input('course'))
                            ->where('user_id', $userId)
                            ->first();
                        if ($userInCourse) {
                            $channelId = $userInCourse->channel_id;
                            $channels = [$channelId];
                        }
                    } else if ($request->input('view') === "answer") {
                        /**
                         * 显示答案
                         * 算法：查询course 答案 channel
                         */
                        $channelId = Course::where('id', $request->input('course'))->value('channel_id');
                        $channels = [$channelId];
                    } else {
                        //显示答案
                        $channelId = Course::where('id', $request->input('course'))->value('channel_id');
                        $channels = [$channelId];
                    }
                } else {
                    $channelId = Course::where('id', $request->input('course'))->value('channel_id');
                    $channels = [$channelId];
                }
            }

            $mode = $request->input('mode', 'read');
            $format = $request->input('format', 'react');

            $htmlRender = new MdRender([
                'mode' => $mode,
                'format' => $format,
                'footnote' => true,
                'origin' => $request->input('origin', true),
                'paragraph' => $request->input('paragraph', false),
            ]);
            //Log::debug('article render',['content'=>$this->content,'format'=>$format,'html'=>$html]);
            $data["html"] = $htmlRender->convert($this->content, $channels);
            if (empty($this->summary)) {
                $data["_summary"] = MdRender::render(
                    $this->content,
                    $channels,
                    $query_id,
                    $mode,
                    'translation',
                    'markdown',
                    'text'
                );
            }
        }
        return $data;
    }
}