<?php

namespace App\Http\Controllers;

use App\Models\ArticleCollection;
use App\Models\Article;
use App\Models\Collection;
use App\Http\Api\ShareApi;
use App\Http\Api\AuthApi;
use Illuminate\Http\Request;
use App\Http\Resources\ArticleMapResource;
use Illuminate\Support\Facades\Log;

class ArticleMapController extends Controller
{
    /**
     * Display a listing of the resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function index(Request $request)
    {
        //
        switch ($request->input('view')) {
            case 'anthology':
                $table = ArticleCollection::where('collect_id', $request->input('id'))
                    ->leftJoin('articles', 'articles.uid', '=', 'article_collections.article_id');
                break;
            case 'article':
                $table = ArticleCollection::where('article_id', $request->input('id'))
                    ->leftJoin('articles', 'articles.uid', '=', 'article_collections.article_id');
                break;
        }
        $count = $table->count();
        $result = [];
        if (!empty($request->input('parent'))) {
            //输出某节点的子节点
            $node = $table->where('article_id', $request->input('parent'))->first();
            if ($node) {
                $nodeList = ArticleCollection::where('collect_id', $request->input('id'))
                    ->where('id', '>', (int)$node->id)->orderBy('id')->get();
                foreach ($nodeList as $key => $curr) {
                    if ($curr->level <= $node->level) {
                        break;
                    }
                    if ($request->has('lazy')) {
                        if ($curr->level === $node->level + 1) {
                            $result[] = $curr;
                        }
                    } else {
                        $result[] = $curr;
                    }
                }
            }
        } else {
            if ($request->has('lazy') && $count > 300) {
                $table = $table->where('level', 1);
            }
            $result = $table->select([
                'article_collections.id',
                'collect_id',
                'article_id',
                'level',
                'article_collections.title',
                'children',
                'article_collections.editor_id',
                'article_collections.deleted_at',
                'articles.status'
            ])->orderBy('id')->get();
        }

        return $this->ok(["rows" => ArticleMapResource::collection($result), "count" => $count]);
    }

    /**
     * Store a newly created resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return \Illuminate\Http\Response
     */
    public function store(Request $request)
    {
        //

        $validated = $request->validate([
            'anthology_id' => 'required',
            'operation' => 'required'
        ]);
        $collection  = Collection::find($request->input('anthology_id'));
        if (!$collection) {
            return $this->error("no recorder");
        }
        //鉴权
        $user = AuthApi::current($request);
        if (!$user) {
            return $this->error(__('auth.failed'));
        }
        if (!CollectionController::UserCanEdit($user["user_uid"], $collection)) {
            Log::error($user["user_uid"] . '无文集编辑权限' . $collection->uid);
            return $this->error(__('auth.failed'));
        }
        switch ($validated['operation']) {
            case 'add':
                # 添加多个文章到文集
                $count = 0;
                foreach ($request->input('article_id') as $key => $article) {
                    # code...

                    if (!ArticleCollection::where('article_id', $article)
                        ->where('collect_id', $request->input('anthology_id'))
                        ->exists()) {
                        $new = new ArticleCollection;
                        $new->id = app('snowflake')->id();
                        $new->article_id = $article;
                        $new->collect_id = $request->input('anthology_id');
                        $new->title = Article::find($article)->title;
                        $new->level = 1;
                        $new->editor_id = $user["user_id"];
                        $new->save();
                        $count++;
                    }
                }
                return $this->ok($count);
                break;
            default:
                return $this->error('unknown operation');
                break;
        }
    }

    /**
     * Display the specified resource.
     *
     * @param  \App\Models\ArticleCollection  $articleCollection
     * @return \Illuminate\Http\Response
     */
    public function show(string $articleCollection)
    {
        //
        $id = explode('_', $articleCollection);
        $result = ArticleCollection::where('article_id', $id[0])
            ->where('collect_id', $id[1])
            ->first();
        if ($result) {
            return $this->ok(new ArticleMapResource($result));
        } else {
            return $this->error('no');
        }
    }

    /**
     * Update the specified resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  string  $id
     * @return \Illuminate\Http\Response
     */
    public function update(Request $request, string $id)
    {
        //
        $validated = $request->validate([
            'operation' => 'required'
        ]);

        $collection  = Collection::find($id);
        if (!$collection) {
            return $this->error("no recorder");
        }
        //鉴权
        $user = AuthApi::current($request);
        if (!$user) {
            return $this->error(__('auth.failed'));
        }
        if (!CollectionController::UserCanEdit($user["user_uid"], $collection)) {
            return $this->error(__('auth.failed'));
        }

        switch ($validated['operation']) {
            case 'anthology':
                $delete = ArticleCollection::where('collect_id', $id)->delete();
                $count = 0;
                foreach ($request->input('data') as $key => $row) {
                    # code...
                    $new = new ArticleCollection;
                    $new->id = app('snowflake')->id();
                    $new->article_id = $row["article_id"];
                    $new->collect_id = $id;
                    $new->title = $row["title"];
                    $new->level = $row["level"];
                    $new->children = $row["children"];
                    $new->editor_id = $user["user_id"];
                    if (isset($row["deleted_at"])) {
                        $new->deleted_at = $row["deleted_at"];
                    }
                    $new->save();
                    $count++;
                }
                ArticleMapController::updateCollection($id);
                return $this->ok($count);
                break;
        }
    }

    /**
     * Remove the specified resource from storage.
     *
     * @param  \App\Models\ArticleCollection  $articleCollection
     * @return \Illuminate\Http\Response
     */
    public function destroy(ArticleCollection $articleCollection)
    {
        //
    }

    public static function deleteArticle(string $articleId)
    {
        //查找有这个文章的文集
        $collections = ArticleCollection::where('article_id', $articleId)
            ->select('collect_id')
            ->groupBy('collect_id')
            ->get();
        //设置为删除
        ArticleCollection::where('article_id', $articleId)
            ->update(['deleted_at' => now()]);
        //查找没有下级文章的文集
        $updateCollections = ArticleCollection::where('article_id', $articleId)
            ->where('children', 0)
            ->select('collect_id')
            ->groupBy('collect_id')
            ->get();
        //真的删除没有下级文章的文集中的文章
        $count = ArticleCollection::where('article_id', $articleId)
            ->where('children', 0)
            ->delete();
        //更新改动的文集
        foreach ($updateCollections as  $collection) {
            # code...
            ArticleMapController::updateCollection($collection->collect_id);
        }
        return [count($collections), $count];
    }

    public static function deleteCollection(string $collectionId)
    {
        $count = ArticleCollection::where('collect_id', $collectionId)
            ->delete();
        return $count;
    }

    /**
     * 用表中的数据生成json，更新collection 表中的字段
     */
    public static function updateCollection(string $collectionId)
    {
        $result = ArticleCollection::where('collect_id', $collectionId)
            ->select(['article_id', 'level', 'title'])
            ->orderBy('id')->get();
        Collection::where('uid', $collectionId)
            ->update(['article_list' => json_encode($result, JSON_UNESCAPED_UNICODE)]);
        return count($result);
    }
}