<?php

namespace App\Http\Controllers\Ask;

use App\Http\Controllers\Controller;
use App\Models\Draft;
use App\Models\Question;
use App\Models\QuestionInvitation;
use App\Models\Tag;
use App\Models\User;
use App\Models\UserTag;
use App\Models\XsSearch;
use App\Services\CaptchaService;
use App\Services\NotificationService;
use Illuminate\Http\Request;

use Illuminate\Support\Facades\App;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Gate;
use Illuminate\Support\Facades\Validator;

class QuestionController extends Controller
{

    /*问题创建校验*/
    protected $validateRules = [
        'title' => 'required|max:255',
        'description' => 'sometimes|max:65535',
        'price' => 'sometimes|integer|min:0|max:1000',
        'tags' => 'sometimes|max:128',
        'category_id' => 'sometimes|numeric'
    ];


    /**
     * 问题详情查看
     */
    public function detail($id, Request $request)
    {
        $question = Question::find($id);

        if (empty($question)) {
            abort(404);
        }

        /*待审核问题游客不可见，管理员和内容作者可见*/
        if ($question->status == 0) {
            if (Auth()->guest()) {
                abort(404);
            }
            $this->authorize('show', $question);
        }

        /*问题查看数+1*/
        $question->increment('views');

        /*已解决问题*/
        $bestAnswer = [];
        if ($question->status === 2) {
            $bestAnswer = $question->answers()->where('adopted_at', '>', 0)->first();
        }

        if ($request->input('sort', 'default') === 'created_at') {
            $answers = $question->answers()->whereNull('adopted_at')->orderBy('created_at', 'DESC')->paginate(10);
        } else {
            $answers = $question->answers()->whereNull('adopted_at')->orderBy('supports', 'DESC')->orderBy('created_at',
                'ASC')->paginate(10);
        }


        /*设置通知为已读*/
        if ($request->user()) {
            $this->readNotifications($question->id, 'question');
        }

        /*相关问题*/
        $relatedQuestions = Question::correlations($question->tags()->pluck('tag_id'));

        /*回答草稿箱处理*/
        $draftId = $request->query('draftId', '');
        $formData['content'] = '';
        if($draftId){
            $draft = Draft::find($draftId);
            if($draft){
                $formData['content'] = $draft->editor_content;
            }
        }
        return view("theme::question.detail")->with('question', $question)
            ->with('answers', $answers)->with('bestAnswer', $bestAnswer)
            ->with('relatedQuestions', $relatedQuestions)->with('formData',$formData);
    }


    /**
     * 问题添加页面显示
     */
    public function create(Request $request)
    {
        $to_user_id = $request->query('to_user_id', 0);
        $draftId = $request->query('draftId', '');
        $draft = Draft::find($draftId);
        if ($draftId && !$draft) {
            abort(404);
        }
        $formData = [];
        $formData['subject'] = '';
        $formData['content'] = '';
        $formData['category_id'] = 0;
        if($draft){
            $draft->form_data = json_decode($draft->form_data,true);
            $formData['subject'] = $draft->subject;
            $formData['content'] = $draft->editor_content;
            $formData['category_id'] = $draft->form_data['category_id'];
            $to_user_id = $draft->formData['to_user_id'];
        }
        $toUser = User::find($to_user_id);
        return view("theme::question.create")->with(compact('toUser', 'to_user_id','formData'));
    }


    /*创建提问*/
    public function store(Request $request, CaptchaService $captchaService)
    {
        $loginUser = $request->user();
        if ($request->user()->status === 0) {
            return $this->error(route('website.index'), '操作失败！您的邮箱还未验证，验证后才能进行该操作！');
        }

        /*防灌水检查*/
        if (Setting()->get('question_limit_num') > 0) {
            $questionCount = $this->counter('question_num_' . $loginUser->id);
            if ($questionCount > Setting()->get('question_limit_num')) {
                return $this->showErrorMsg(route('website.index'),
                    '你已超过每小时最大提问数' . Setting()->get('question_limit_num') . '，如有疑问请联系管理员!');
            }
        }

        $request->flash();
        /*如果开启验证码则需要输入验证码*/
        if (Setting()->get('code_create_question')) {
            $captchaService->setValidateRules('code_create_question', $this->validateRules);
        }

        $this->validate($request,$this->validateRules);
        $price = abs($request->input('price'));

        if($price > 0 && $request->user()->userData->coins < $price){
            return $this->error(route('ask.question.create'),'操作失败！您的金币数不足！');
        }

        $data = [
            'user_id' => $loginUser->id,
            'category_id' => $request->input('category_id', 0),
            'title' => trim($request->input('title')),
            'description' => clean($request->input('description')),
            'price' => $price,
            'hide' => intval($request->input('hide')),
            'status' => 1,
        ];
        $question = Question::create($data);
        /*判断问题是否添加成功*/
        if ($question) {
            /*悬赏提问*/
            if ($question->price > 0) {
                $this->credit($question->user_id, 'ask', -$question->price, 0, $question->id, $question->title);
            }

            /*添加标签*/
            $tagString = trim($request->input('tags'));
            Tag::multiSave($tagString, $question);

            //记录动态 匿名状态不记录动态
            if (!$question->hide) {
                $this->doing($question->user_id, 'ask', get_class($question), $question->id, $question->title,
                    $question->description);
            }


            /*邀请作答逻辑处理*/
            $to_user_id = $request->input('to_user_id', 0);
            $this->notify($question->user_id, $to_user_id, 'invite_answer', $question->title, $question->id);

            $this->invite($question->id, $to_user_id, $request);

            /*用户提问数+1*/
            $loginUser->userData()->increment('questions');
            UserTag::multiIncrement($loginUser->id, $question->tags()->get(), 'questions');
            $this->credit($request->user()->id, 'ask', Setting()->get('coins_ask'), Setting()->get('credits_ask'),
                $question->id, $question->title);

            if ($question->status == 1) {
                $message = '发起提问成功! ' . get_credit_message(Setting()->get('credits_ask'), Setting()->get('coins_ask'));
            } else {
                $message = '问题发布成功！为了确保问答的质量，我们会对您的提问内容进行审核。请耐心等待......';
            }

            $this->counter('question_num_' . $question->user_id, 1, 60);

            return $this->success(route('ask.question.detail', ['question_id' => $question->id]), $message);


        }

        return $this->error(route('website.index'), "问题创建失败，请稍后再试");

    }


    /*显示问题编辑页面*/
    public function edit($id, Request $request)
    {
        $question = Question::find($id);

        if (!$question) {
            abort(404);
        }

        /*编辑权限控制*/
        $this->authorize('update', $question);

        /*编辑问题时效控制*/
        if (!Gate::allows('updateInTime', $question)) {
            return $this->showErrorMsg(route('website.index'), '你已超过问题可编辑的最大时长，不能进行编辑了。如有疑问请联系管理员!');
        }

        return view("theme::question.edit")->with(compact('question'));
    }


    /*问题内容编辑*/
    public function update(Request $request, CaptchaService $captchaService)
    {
        $question_id = $request->input('id');
        $question = Question::find($question_id);
        if (!$question) {
            abort(404);
        }

        $this->authorize('update', $question);

        $request->flash();

        /*普通用户修改需要输入验证码*/
        if (Setting()->get('code_create_question')) {
            $captchaService->setValidateRules('code_create_question', $this->validateRules);
        }

        $this->validate($request, $this->validateRules);
        $question->title = trim($request->input('title'));
        $question->description = clean($request->input('description'));
        $question->hide = intval($request->input('hide'));
        $question->category_id = $request->input('category_id', 0);

        $question->save();
        $tagString = trim($request->input('tags'));

        /*更新标签*/
        Tag::multiSave($tagString, $question);

        return $this->success(route('ask.question.detail', ['question_id' => $question->id]), "问题编辑成功");

    }

    /*追加悬赏*/
    public function appendReward($id, Request $request)
    {
        $question = Question::find($id);
        if (!$question) {
            abort(404);
        }

        $validateRules = [
            'coins' => 'required|digits_between:1,' . $request->user()->userData->coins
        ];

        $this->validate($request, $validateRules);

        DB::beginTransaction();
        try {
            $this->credit($request->user()->id, 'append_reward', -abs($request->input('coins')), 0, $question->id,
                $question->title);
            $question->increment('price', $request->input('coins'));

            DB::commit();
            return $this->success(route('ask.question.detail', ['question_id' => $id]), "追加悬赏成功");

        } catch (\Exception $e) {
            DB::rollBack();
            return $this->error(route('ask.question.detail', ['question_id' => $id]), "追加悬赏失败，请稍后再试");
        }

    }

    /*问题建议*/
    public function suggest(Request $request)
    {

        $validateRules = [
            'word' => 'required|min:2|max:255',
        ];
        $this->validate($request, $validateRules);

        if (Setting()->get('xunsearch_open', 0) != 1) {
            return response('');
        }
        $word = $request->input('word');

        $xsSearch = XsSearch::getSearch();
        $model = App::make('App\Models\\Question');
        $docs = $xsSearch->model($model)->addQuery('subject:' . $word)->setLimit(10, 0)->search();
        $suggestList = '';
        foreach ($docs as $doc) {
            $question = Question::find($doc->id);
            if (!$question) {
                continue;
            }
            $suggestList .= '<li>';

            if ($question->status === 2) {
                $suggestList .= '<span class="label label-success pull-left mr-5">解决</span>';
            }
            $suggestList .= '<a href="' . route('ask.question.detail',
                    ['id' => $doc->id]) . '" target="_blank" class="mr-10">' . XsSearch::getSearch()->highlight($doc->subject) . '</a>';
            $suggestList .= '<small class="text-muted">' . $question->answers . ' 回答</small>';
            $suggestList .= '</li>';
        }
        return response($suggestList);

    }


    /*邀请回答*/
    public function invite($question_id, $to_user_id, Request $request)
    {

        $loginUser = $request->user();

        if ($loginUser->id == $to_user_id) {
            return $this->ajaxError(50009, '不用邀请自己，您可以直接回答 ：）');
        }

        $question = Question::find($question_id);
        if (!$question) {
            return $this->ajaxError(50001, 'notFound');
        }

        if ($this->counter('question_invite_num_' . $loginUser->id) > config('tipask.user_invite_limit')) {
            return $this->ajaxError(50007, '超出每天最大邀请次数');
        }


        $toUser = User::find(intval($to_user_id));
        if (!$toUser) {
            return $this->ajaxError(50005, '被邀请用户不存在');
        }

        if (!$toUser->allowedEmailNotify('invite_answer')) {
            return $this->ajaxError(50006, '邀请人设置为不允许被邀请回答');
        }

        /*是否已邀请，不能重复邀请*/
        if ($question->isInvited($toUser->email, $loginUser->id)) {
            return $this->ajaxError(50008, '该用户已被邀请，不能重复邀请');
        }

        $invitation = QuestionInvitation::create([
            'from_user_id' => $loginUser->id,
            'question_id' => $question->id,
            'user_id' => $toUser->id,
            'send_to' => $toUser->email
        ]);

        if ($invitation) {
            $this->counter('question_invite_num_' . $loginUser->id, 1);
            $subject = $loginUser->name . "在「" . Setting()->get('website_name') . "」向您发起了回答邀请";
            $message = "我在 " . Setting()->get('website_name') . " 上遇到了问题「" . $question->title . "」 → " . route("ask.question.detail",
                    ['question_id' => $question->id]) . "，希望您能帮我解答 ";
            $this->sendEmail($invitation->send_to, $subject, $message);

            // 记录到通知
            NotificationService::notify($loginUser->id, $toUser->id, 'invite_answer', $question->title, $question->id);
            return $this->ajaxSuccess('success');
        }

        return $this->ajaxError(10008, '邀请失败，请稍后再试');
    }


    public function inviteEmail($question_id, Request $request)
    {

        $loginUser = $request->user();

        if ($this->counter('question_invite_num_' . $loginUser->id) > config('tipask.user_invite_limit')) {
            return $this->ajaxError(50007, '超出每天最大邀请次数');
        }

        $question = Question::find($question_id);
        if (!$question) {
            return $this->ajaxError(50001, 'question not fund');
        }

        $validator = Validator::make($request->all(), [
            'sendTo' => 'required|email|max:255',
            'message' => 'required|min:10|max:10000',
        ]);

        if ($validator->fails()) {
            $this->ajaxError(50011, '字段校验失败');
        }

        $loginUser = $request->user();
        $email = $request->input('sendTo');
        $content = $request->input('message');
        /*是否已邀请，不能重复邀请*/
        if ($question->isInvited($email, $loginUser->id)) {
            return $this->ajaxError(50008, '该用户已被邀请，不能重复邀请');
        }

        $invitation = QuestionInvitation::create([
            'from_user_id' => $loginUser->id,
            'question_id' => $question->id,
            'user_id' => 0,
            'send_to' => $email
        ]);

        if ($invitation) {
            $this->counter('question_invite_num_' . $loginUser->id, 1);
            $subject = $loginUser->name . "在「" . Setting()->get('website_name') . "」向您发起了回答邀请";
            $message = $content;
            $this->sendEmail($invitation->send_to, $subject, $message);
            return $this->ajaxSuccess('success');
        }

        return $this->ajaxError(10008, '邀请失败，请稍后再试');
    }

    public function invitations($question_id, $type)
    {
        $question = Question::find($question_id);
        if (!$question) {
            return $this->ajaxError(50001, 'question not fund');
        }

        $showRows = ($type == 'part') ? 3 : 100;

        $invitations = $question->invitations()->where("user_id", ">", 0)->orderBy('created_at',
            'desc')->groupBy('user_id')->take($showRows);

        $invitedUsers = [];
        foreach ($invitations->get() as $invitation) {
            if ($invitation->user()) {
                $invitedUsers[] = '<a target="_blank" href="' . route('auth.space.index',
                        ['user_id' => $invitation->user->id]) . '">' . $invitation->user->name . '</a>';
            }
        }

        $invitedHtml = implode(",&nbsp;", $invitedUsers);

        $totalInvitedNum = $invitations->count();
        if ($type == 'part' && $totalInvitedNum > $showRows) {
            $invitedHtml .= '等 <a id="showAllInvitedUsers" href="javascript:void(0);">' . $totalInvitedNum . '</a> 人';
        }
        if ($totalInvitedNum > 0) {
            $invitedHtml .= '&nbsp;已被邀请';
        }

        return response($invitedHtml);

    }


}