import React, { useState, useEffect} from 'react';
import NavBar from '../components/NavBar';
import LandingMap from '../components/LandingMap';
import { CustomInput } from 'reactstrap';
import { Container, Row, Col, Button, Jumbotron } from "reactstrap";
import axios from 'axios';
import Loading from '../components/Loading';
import MealCard from '../components/MealCard';

const LandingPage = (props) => {
    const [datas, setDatas] = useState([]);
    const [filteredDatas, setFilteredDatas] = useState([]);
    const [RandomCards, setRandomCards] = useState([]);
    const [all, setAll] = useState(false);
    const [Kfood, setKfood] = useState(false);
    const [Cfood, setCfood] = useState(false);
    const [Jfood, setJfood] = useState(false);
    const [meat, setMeat] = useState(false);
    const [snackfood, setSnackfood] = useState(false);
    const [pub, setPub] = useState(false);
    const [fastfood, setFastfood] = useState(false);
    const [cafe, setCafe] = useState(false);
    const [etc, setEtc] = useState(false);
    const [isRandom, setIsRandom] = useState(0);
   
    useEffect(() => {
        const fetchData = async () => {
            const result = await axios(
              '/api/datas',
            );
            setDatas(result.data);
          };
          fetchData();
    }, []);

    useEffect(() => {
        let result = [];
        const states = [Kfood, Cfood, Jfood, meat, snackfood, pub, fastfood, cafe, etc];
        const types = [['한식'], ['중식'], ['일식'], ['고기'], ['분식'], ['호프', '술집'], ['패스트푸드'], ['카페', '디저트'], ['기타']];
        for(let i = 0; i < states.length; i++) {
            if(states[i] === true) {
                const temp = types[i];
                for(let j = 0; j < datas.length; j++) {
                    for(let k = 0; k < temp.length; k++) {
                        if(datas[j].type === temp[k]) {
                            result.push(datas[j]);
                        }
                    }
                }
            }
        }
        setFilteredDatas(result);
    }, [Kfood, Cfood, Jfood, meat, snackfood, pub, fastfood, cafe, etc, datas]);

    useEffect(() => {
        if(all === true) {
            setKfood(true);
            setCfood(true);
            setJfood(true);
            setMeat(true);
            setSnackfood(true);
            setPub(true);
            setFastfood(true);
            setCafe(true);
            setEtc(true);
        }
        else {
            setKfood(false);
            setCfood(false);
            setJfood(false);
            setMeat(false);
            setSnackfood(false);
            setPub(false);
            setFastfood(false);
            setCafe(false);
            setEtc(false);
        }
    }, [all]);

    const randomHandler = () => {
        
        if(filteredDatas.length === 0) {
            alert('메뉴를 선택하세요');
            return ;
        } 
        else {
            setIsRandom(1);
            setTimeout(()=>{
            let x = getRandomInt(0, filteredDatas.length);
            let y = -1;
            while(1) {
                y = getRandomInt(0, filteredDatas.length);
                if(x!==y) break;
            }
            setRandomCards([filteredDatas[x], filteredDatas[y]]);    
            setIsRandom(2);
        }, 2500);
        }
    }

    const getRandomInt = (min, max) => {
        min = Math.ceil(min);
        max = Math.floor(max);
        return Math.floor(Math.random() * (max - min)) + min; //최댓값은 제외, 최솟값은 포함
      }

    return (
        <>
            <NavBar/>
            <Container style={{
                paddingTop : '1.5rem'
            }}>
            
            <div style={{'display':'flex', 'width':'100%', "height":'100%'}}>
                <Container>
                
                    <Jumbotron 
                    style={{
                        'backgroundColor':'#fff',
                        'paddingTop': '1.5rem',
                        'boxShadow': '0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19)'
                    }}
                    >  
                    <Row xs="1" sm="1" md="2"> 
                        <Col style={{
                            
                        }}>
                        <h3 className="text-center">
                            <span className="font-weight-bold">랜덤추천 : </span>메뉴를 선택하세요 
                        </h3>
                        <span style={{
                            'paddingLeft' : '0.5rem'
                        }}>
                        {/* <Button color="warning">Random!</Button> */}
                        
                        </span>
                        <Container>                        
                        <Row>
                    <Col>
                        <CustomInput type="switch" id="all" label="전체"
                        checked={all}
                        onChange={()=> setAll(!all)}
                        />
                    </Col>
                </Row>
                <Row xs="3" sm="3" md="4">
                    <Col>
                        <CustomInput type="checkbox" id="Kfood" label="한식" 
                        checked={Kfood}
                        onChange={()=>setKfood(!Kfood)}
                        />
                    </Col>
                    <Col>
                        <CustomInput type="checkbox" id="Cfood" label="중식"
                        checked={Cfood}
                        onChange={()=>setCfood(!Cfood)}
                        />
                    </Col>
                    <Col>
                        <CustomInput type="checkbox" id="Jfood" label="일식"
                        checked={Jfood}
                        onChange={()=>setJfood(!Jfood)}
                        />
                    </Col>
                    <Col>
                        <CustomInput type="checkbox" id="meat" label="고기"
                        checked={meat}
                        onChange={()=>setMeat(!meat)}
                        />
                    </Col>
                    <Col>
                        <CustomInput type="checkbox" id="snackfood" label="분식"
                        checked={snackfood}
                        onChange={()=>setSnackfood(!snackfood)}
                        />
                    </Col>
                    <Col>
                        <CustomInput type="checkbox" id="pub" label="호프/술집"
                        checked={pub}
                        onChange={()=>setPub(!pub)}
                        />
                    </Col>
                
                    <Col>
                        <CustomInput type="checkbox" id="fastfood" label="패스트푸드"
                        checked={fastfood}
                        onChange={()=>setFastfood(!fastfood)}
                        />
                    </Col>
                    <Col>
                        <CustomInput type="checkbox" id="cafe" label="카페/디저트"
                        checked={cafe}
                        onChange={()=>setCafe(!cafe)}
                        />
                    </Col>
                    <Col>
                        <CustomInput type="checkbox" id="etc" label="기타"
                        checked={etc}
                        onChange={()=>setEtc(!etc)}
                        />
                    </Col>
                    </Row>
                    <div style={{
                            'paddingTop':'1.5rem',
                            'alignItems':'center'
                            ,'display':'flex', 'width':'100%', "height":'100%','textAlign':'center'
                        }}>
                            <Button onClick={randomHandler} size="lg" style={{
                                'margin':'0 auto'
                            }} color="danger">Random!</Button>
                        </div> 
                    </Container>

                        
                        </Col>
                        <Col>
                        {isRandom === 0 ? ('') : ( (isRandom === 1) ? <span style={{'padding':'1.5rem'}}><Loading value="추첨중.."/></span> :(
                            <Container>
                            <Row>
                                {
                                    RandomCards.map((data, index)=> (
                                        <Col>
                                <MealCard
                                key = {index}
                                id = {data.id}
                                name = {data.name}
                                address = {data.address}
                                latitude = {data.latitude}
                                longitude = {data.longitude}
                                type = {data.type}
                                menu = {data.menu}
                                img = {data.img}
                                img_source = {data.img_source}
                                />
                                </Col>
                                    ))
                                }


                            </Row>
                        </Container>
                        ) 
                        
                        
                        )}
                        </Col>
                        </Row>
                    </Jumbotron>
                </Container>
            </div>
            
            {datas ? <LandingMap
                datas = {datas}
            /> : 'loading...'}
            </Container>


                
                    
                
                
        </>
    );
}


export default LandingPage;