<?php

namespace App\Http\Controllers;

use App\Http\Api\MDRender;
use App\Http\Api\UserApi;
use App\Models\Article;
use App\Models\Course;
use App\Models\CourseMember;
use App\Models\Discussion;
use App\Models\Sentence;
use App\Models\Wbw;
use App\Models\WbwBlock;
use Illuminate\Http\Request;
use Illuminate\Http\Response;

class ExerciseController extends Controller
{
    /**
     * Display a listing of the resource.
     *
     * @return Response
     */
    public function index(Request $request)
    {
        /**
         * 列出某个练习所有人的提交情况
         * 情况包括
         * 1.作业填充百分比
         * 2.问题数量
         */
        $validated = $request->validate([
            'course_id' => 'required',
            'article_id' => 'required',
            'exercise_id' => 'required',
        ]);
        $output = [];
        // 课程信息
        $course = Course::findOrFail($validated['course_id']);

        // 查询练习句子编号
        $article = Article::where('uid', $validated['article_id'])->value('content');

        $wiki = MDRender::markdown2wiki($article);
        $xml = MDRender::wiki2xml($wiki);
        $html = MDRender::xmlQueryId($xml, $validated['exercise_id']);
        $sentences = MDRender::take_sentence($html);

        // 获取课程答案逐词解析列表
        $answerWbw = [];
        foreach ($sentences as $sent) {
            // code...wbw
            $sentId = explode('-', $sent);
            if (count($sentId) < 4) {
                break;
            }
            $courseWb = WbwBlock::where('book_id', $sentId[0])
                ->where('paragraph', $sentId[1])
                ->where('channel_uid', $course->channel_id)
                ->value('uid');
            if ($courseWb) {
                $wbwId = Wbw::where('block_uid', $courseWb)
                    ->whereBetween('wid', [$sentId[2], $sentId[3]])
                    ->select('uid')->get();
                foreach ($wbwId as $id) {
                    // code...
                    $answerWbw[] = $id->uid;
                }
            }
        }
        $members = CourseMember::where('course_id', $validated['course_id'])
            ->where('role', 'student')
            ->select(['user_id', 'channel_id'])
            ->get();
        foreach ($members as $member) {
            // code...
            $data = [
                'user' => UserApi::getByUuid($member->user_id),
                'wbw' => 0,
                'translation' => 0,
                'question' => 0,
                'html' => '',
            ];
            if (! empty($member->channel_id)) {
                //
                foreach ($sentences as $sent) {
                    // code...wbw
                    $sentId = explode('-', $sent);
                    if (count($sentId) < 4) {
                        break;
                    }
                    $wb = WbwBlock::where('book_id', $sentId[0])
                        ->where('paragraph', $sentId[1])
                        ->where('channel_uid', $member->channel_id)
                        ->value('uid');
                    if ($wb) {
                        $wbwCount = Wbw::where('block_uid', $wb)
                            ->whereBetween('wid', [$sentId[2], $sentId[3]])
                            ->where('status', '>', 4)
                            ->count();
                        $data['wbw'] += $wbwCount;
                    }
                    // translation
                    $sentCount = Sentence::where('book_id', $sentId[0])
                        ->where('paragraph', $sentId[1])
                        ->where('word_start', $sentId[2])
                        ->where('word_end', $sentId[3])
                        ->where('channel_uid', $member->channel_id)
                        ->count();
                    $data['translation'] += $sentCount;
                    // discussion
                    // 查找答案的wbw 对应的discussion
                    $discussionCount = Discussion::whereIn('res_id', $answerWbw)
                        ->where('editor_uid', $member->user_id)
                        ->whereNull('parent')
                        ->count();
                    $data['question'] += $discussionCount;

                    $tpl = MDRender::xml2tpl($html, $member->channel_id);
                    $data['html'] .= $tpl;
                }
            }
            $output[] = $data;
        }

        return $this->ok(['rows' => $output, 'count' => count($output)]);
    }

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

    /**
     * Display the specified resource.
     *
     * @return Response
     */
    public function show(Course $course)
    {
        //
    }

    /**
     * Update the specified resource in storage.
     *
     * @return Response
     */
    public function update(Request $request, Course $course)
    {
        //
    }

    /**
     * Remove the specified resource from storage.
     *
     * @return Response
     */
    public function destroy(Course $course)
    {
        //
    }
}