<?php

/**
 * 输出某章节的句子列表。算法跟随章节显示功能
 */

namespace App\Http\Controllers;

use App\Models\PaliText;
use App\Models\PaliSentence;
use Illuminate\Http\Request;

class SentencesInChapterController extends Controller
{
    /**
     * Display a listing of the resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function index(Request $request)
    {
        //
        $book = $request->input('book');
        $para = $request->input('para');
        $chapter = PaliText::where('book', $book)
            ->where('paragraph', $para)
            ->first();
        if (!$chapter) {
            return $this->error("no chapter data");
        }
        $paraFrom = $para;
        $paraTo = $para + $chapter->chapter_len - 1;

        //1. 计算 标题和下一级第一个标题之间 是否有间隔
        $nextChapter =  PaliText::where('book', $book)
            ->where('paragraph', ">", $para)
            ->where('level', '<', 8)
            ->orderBy('paragraph')
            ->value('paragraph');
        $between = $nextChapter - $para;
        //查找子目录
        $chapterLen = $chapter->chapter_len;
        $toc = PaliText::where('book', $book)
            ->whereBetween('paragraph', [$paraFrom + 1, $paraFrom + $chapterLen - 1])
            ->where('level', '<', 8)
            ->orderBy('paragraph')
            ->select(['book', 'paragraph', 'level', 'toc'])
            ->get();

        if ($between > 1) {
            //有间隔
            $paraTo = $nextChapter - 1;
        } else {
            if ($chapter->chapter_strlen > 2000) {
                if (count($toc) > 0) {
                    //有子目录只输出标题和目录
                    $paraTo = $paraFrom;
                } else {
                    //没有子目录 全部输出
                }
            } else {
                //章节小。全部输出 不输出子目录
                $toc = [];
            }
        }

        $sent = PaliSentence::where('book', $book)
            ->whereBetween('paragraph', [$paraFrom, $paraTo])
            ->select(['book', 'paragraph', 'word_begin', 'word_end'])
            ->orderBy('paragraph')
            ->orderBy('word_begin')
            ->get();
        return $this->ok(['rows' => $sent, 'count' => count($sent)]);
    }

    /**
     * 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  \App\Models\PaliText  $paliText
     * @return \Illuminate\Http\Response
     */
    public function show(PaliText $paliText)
    {
        //
    }

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

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