<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Models\BookTitle;
use App\Models\FtsText;
use App\Models\Tag;
use App\Models\TagMap;
use App\Models\PaliText;
use Illuminate\Support\Facades\Http;
use Illuminate\Support\Facades\DB;
use App\Http\Resources\SearchResource;
use App\Http\Resources\SearchBookResource;
use Illuminate\Support\Facades\Log;
use App\Tools\Tools;


class SearchController extends Controller
{
    /**
     * Display a listing of the resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function index(Request $request)
    {
        //
        $searchChapters = [];
        $searchBooks = [];
        $searchBookId = [];
        $queryBookId = '';

        if($request->has('book')){
            $queryBookId = ' AND pcd_book_id = ' . (int)$request->get('book');
        }else if($request->has('tags')){
            //查询搜索范围
            //查询搜索范围
            $tagItems = explode(';',$request->get('tags'));
            $bookId = [];
            foreach ($tagItems as $tagItem) {
                # code...
                $bookId = array_merge($bookId,$this->getBookIdByTags(explode(',',$tagItem)));
            }
            $queryBookId = ' AND pcd_book_id in ('.implode(',',$bookId).') ';
        }

        $key = explode(';',$request->get('key')) ;
        $param = [];
        $countParam = [];
        switch ($request->get('match','case')) {
            case 'complete':
            case 'case':
                # code...
                $querySelect_rank_base = " ts_rank('{0.1, 0.2, 0.4, 1}',
                                                full_text_search_weighted,
                                                websearch_to_tsquery('pali', ?)) ";
                $querySelect_rank_head = implode('+', array_fill(0, count($key), $querySelect_rank_base));
                $param = array_merge($param,$key);
                $querySelect_rank = " {$querySelect_rank_head} AS rank, ";
                $querySelect_highlight = " ts_headline('pali', content,
                                            websearch_to_tsquery('pali', ?),
                                            'StartSel = ~~, StopSel = ~~,MaxWords=3500, MinWords=3500,HighlightAll=TRUE')
                                            AS highlight,";
                array_push($param,implode(' ',$key));
                break;
            case 'similar':
                # 形似，去掉变音符号
                $key = Tools::getWordEn($key[0]);
                $querySelect_rank = "
                    ts_rank('{0.1, 0.2, 0.4, 1}',
                        full_text_search_weighted_unaccent,
                        websearch_to_tsquery('pali_unaccent', ?))
                    AS rank, ";
                    $param[] = $key;
                $querySelect_highlight = " ts_headline('pali_unaccent', content,
                        websearch_to_tsquery('pali_unaccent', ?),
                        'StartSel = ~~, StopSel = ~~,MaxWords=3500, MinWords=3500,HighlightAll=TRUE')
                        AS highlight,";
                $param[] = $key;
                break;
        }
        $_queryWhere = $this->getQueryWhere($request->get('key'),$request->get('match','case'));
        $queryWhere = $_queryWhere['query'];
        $param = array_merge($param,$_queryWhere['param']);

        $querySelect_2 = "  book,paragraph,content ";

        $queryCount = "SELECT count(*) as co FROM fts_texts WHERE {$queryWhere} {$queryBookId};";
        $resultCount = DB::select($queryCount, $_queryWhere['param']);

        $limit = $request->get('limit',10);
        $offset = $request->get('offset',0);
        switch ( $request->get('orderby',"rank")) {
            case 'rank':
                $orderby = " ORDER BY rank DESC ";
                break;
            case 'paragraph':
                $orderby = " ORDER BY book,paragraph ";
                break;
            default:
                $orderby = "";
                break;
        };
        $query = "SELECT
            {$querySelect_rank}
            {$querySelect_highlight}
            {$querySelect_2}
            FROM fts_texts
            WHERE
                {$queryWhere}
                {$queryBookId}
                {$orderby}
            LIMIT ? OFFSET ? ;";
        $param[] = $limit;
        $param[] = $offset;

        $result = DB::select($query, $param);

        //待查询单词列表
        //$caseMan = new CaseMan();
        //$wordSpell = $caseMan->BaseToWord($key);

        return $this->ok(["rows"=>SearchResource::collection($result),"count"=>$resultCount[0]->co]);
    }

    public function book_list(Request $request){
        $searchChapters = [];
        $searchBooks = [];
        $queryBookId = '';

        if($request->has('tags')){
            //查询搜索范围
            $tagItems = explode(';',$request->get('tags'));
            $bookId = [];
            foreach ($tagItems as $tagItem) {
                # code...
                $bookId = array_merge($bookId,$this->getBookIdByTags(explode(',',$tagItem)));
            }
            $queryBookId = ' AND pcd_book_id in ('.implode(',',$bookId).') ';
        }
        $key = $request->get('key');

        $queryWhere = $this->getQueryWhere($key,$request->get('match','case'));

        $query = "SELECT pcd_book_id, count(*) as co FROM fts_texts WHERE {$queryWhere['query']} {$queryBookId} GROUP BY pcd_book_id ORDER BY co DESC;";
        $result = DB::select($query, $queryWhere['param']);

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

    private function getQueryWhere($key,$match){
        $key = explode(';',$key) ;
        $param = [];
        $queryWhere = '';
        switch ($match) {
            case 'complete':
            case 'case':
                # code...
                $queryWhereBase = " full_text_search_weighted @@ websearch_to_tsquery('pali', ?) ";
                $queryWhereBody = implode(' or ', array_fill(0, count($key), $queryWhereBase));
                $queryWhere = " ({$queryWhereBody}) ";
                $param = array_merge($param,$key);
                break;
            case 'similar':
                # 形似，去掉变音符号
                $queryWhere = " full_text_search_weighted_unaccent @@ websearch_to_tsquery('pali_unaccent', ?) ";
                $key = Tools::getWordEn($key[0]);
                $param = [$key];
                break;
        };
        return (['query'=>$queryWhere,'param'=>$param]);
    }

    private function getBookIdByTags($tags){
        $searchBookId = [];
        if(empty($tags)){
            return $searchBookId;
        }

        //查询搜索范围
        $tagIds = Tag::whereIn('name',$tags)->select('id')->get();
        $paliTextIds = TagMap::where('table_name','pali_texts')->whereIn('tag_id',$tagIds)->select('anchor_id')->get();
        $paliPara=[];
        foreach ($paliTextIds as $key => $value) {
            # code...
            if(isset($paliPara[$value->anchor_id])){
                $paliPara[$value->anchor_id]++;
            }else{
                $paliPara[$value->anchor_id]=1;
            }
        }
        $paliId=[];
        foreach ($paliPara as $key => $value) {
            # code...
            if($value===count($tags)){
                $paliId[] = $key;
            }
        }
        $para = PaliText::where('level',1)->whereIn('uid',$paliId)->get();

        if(count($para)>0){
            foreach ($para as $key => $value) {
                # code...
                $book_id = BookTitle::where('book',$value['book'])->where('paragraph',$value['paragraph'])->value('id');
                if(!empty($book_id)){
                    $searchBookId[] = $book_id;
                }
            }
        }
        return $searchBookId;

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

    /**
     * Display the specified resource.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function show($id)
    {
        //
    }

    /**
     * Update the specified resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function update(Request $request, $id)
    {
        //
    }

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