var express = require('express');
const request = require('request');
const TARGET_URL = 'https://api.line.me/v2/bot/message/reply'
const TOKEN = ''
const fs = require('fs');
const path = require('path');
const HTTPS = require('https');
const domain = ""
const sslport = 23023;
const bodyParser = require('body-parser');
var app = express();
app.use(bodyParser.json());
const config = require('./config')
const mongoose = require("mongoose");
const {range} = require("express/lib/request");
const connect = mongoose
    .connect(config.url, {
        useNewUrlParser: true,
        useUnifiedTopology: true
    })
    .then(() => console.log("DB : Succesfully Connected"))
    .catch((err) => console.log(err.message));
var express = require('express');
const {Subinfo} = require('./DB_collect/models/model');

ID_data_array = []

app.post('/hook', function (req, res) {

    var eventObj = req
        .body
        .events[0];
    var source = eventObj.source;
    var message = eventObj.message;

    var user_ID = eventObj.source['userId']
    var data = eventObj.message['text']

    var found = false;
    if (data == '추천') {

        for (var i in ID_data_array) {
            if (ID_data_array[i][0] == user_ID) {
                if (ID_data_array[i].length == 5) {

                    var campusinfo = ID_data_array[i][1]
                    var collegeinfo = ID_data_array[i][2]
                    var departmentinfo = ID_data_array[i][3]
                    var gradeinfo = ID_data_array[i][4]

                    var name = []
                    var time = []
                    var prof = []
                    var credit = []

                    Subinfo
                        .find(
                            {campus: `${campusinfo}`, college: `${collegeinfo}`, department: `${departmentinfo}`, grade: `${gradeinfo}`}
                        )
                        .then((sub) => {
                            if (sub) {
                                for (var i in sub) {
                                    if (sub[i]['subject'].length == 0) {
                                        continue
                                    }

                                    if (sub[i]['choice'] == '필수') {
                                        name.push(sub[i]['name'])
                                        credit.push(sub[i]['credit'])

                                        var random_num = (Math.floor(Math.random() * (sub[i]['subject'].length)))

                                        if (time.length > 0) {
                                            while (true) {
                                                try {
                                                    var tmp = 0
                                                    var random_num = (Math.floor(Math.random() * (sub[i]['subject'].length)))

                                                    for (var j in time) {
                                                        if (time[j].slice(0, 1) == sub[i]['subject'][random_num]['time'].slice(0, 1)) {
                                                            var tmp_time1 = Number(`${time[j].slice(2, 4) + '.' + time[j].slice(5, 7)}`)
                                                            var tmp_time2 = Number(`${time[j].slice(8, 10) + '.' + time[j].slice(11, 13)}`)
                                                            var tmp_time3 = Number(
                                                                `${sub[i]['subject'][random_num]['time'].slice(2, 4) + '.' + sub[i]['subject'][random_num]['time'].slice(
                                                                    5,
                                                                    7
                                                                )}`
                                                            )

                                                            if (tmp_time3 >= tmp_time1 & tmp_time3 <= tmp_time2) {
                                                                tmp = 1
                                                                break
                                                            }
                                                        }
                                                    }
                                                    if (tmp == 0) {
                                                        break
                                                    }
                                                } catch (err) {
                                                    console.error(err);
                                                }
                                            }
                                        }
                                        time.push(sub[i]['subject'][random_num]['time'])
                                        prof.push(sub[i]['subject'][random_num]['prof'])
                                    }
                                }
                            } else {
                                console.log(err)
                            }
                            var message_array = []

                            var result_split = []
                            for (var i in name) {
                                result_split[i] = '\n';
                                var splitname = time[i].split('<br>')
                                for (var j in splitname) {
                                    if (j != splitname.length - 1) {
                                        result_split[i] += (splitname[j] + '\n');
                                    } else {
                                        result_split[i] += splitname[j];
                                    }
                                }
                                var message_json = {
                                    'type': 'text',
                                    'text': `${ '과목명: ' + name[i] + '\n강의 시간:' + result_split[i] + '\n교수님: ' + prof[i] + '' +
                                            '\n학점: ' + credit[i]}`
                                }
                                message_array.push(message_json)
                            }
                            if (message_array.length == 0) {
                                message_array = [
                                    {
                                        'type': 'text',
                                        'text': '입력과정에서 오류가 있습니다. \'시작\'을 입력해주세요.'
                                    }
                                ]
                            } else {
                                message_array[message_array.length - 1] = {
                                    'type': 'text',
                                    'text': `${ '과목명: ' + name[name.length - 1] + '\n강의 시간: ' + result_split[result_split.length - 1] +
                                            '\n교수님: ' + prof[prof.length - 1] + '\n학점: ' + credit[credit.length - 1] + '\n' +
                                            '\n만약 다른 추천을 원하면 \'추천\'을 입력해주세요.\n처음 입력으로 돌아가고 싶으시면 \'시작\'을 입력해주세요'}`
                                }
                            }

                            request.post({
                                url: TARGET_URL,
                                headers: {
                                    'Authorization': `Bearer ${TOKEN}`
                                },

                                json: {
                                    "replyToken": eventObj.replyToken,
                                    "messages": message_array
                                }
                            }, (error, response, body) => {
                                console.log(body)
                            });
                        })
                }
                break
            }
        }
    } else {
        if (data == '다시') {
            for (var i in ID_data_array) {
                if (ID_data_array[i][0] == user_ID) {
                    ID_data_array[i] = [user_ID];
                }
            }
        } else {
            if (data != '시작') {
                if (ID_data_array.length == 0) {
                    ID_data_array.push([user_ID])
                    ID_data_array[0].push(data)
                } else {
                    var find = 0
                    for (var i in ID_data_array) {
                        if (ID_data_array[i][0] == user_ID) {
                            find = 1
                            if (ID_data_array[i].length < 5) {
                                ID_data_array[i].push(data)
                            } else {
                                ID_data_array[i] = [user_ID];
                                ID_data_array[i].push(data);
                            }
                        }
                    }
                    if (find == 0) {
                        ID_data_array.push([user_ID]);
                        ID_data_array[ID_data_array.length - 1].push(data);
                    }
                }

                // request log
                console.log('======================', new Date(), '======================');
                console.log('[request]', req.body);
                console.log('[request source] ', eventObj.source);
                console.log('[request message]', eventObj.message);

                for (var i in ID_data_array) {
                    console.log(ID_data_array[i])
                }

                for (var i in ID_data_array) {
                    if (ID_data_array[i][0] == user_ID) {
                        if (ID_data_array[i].length == 5) {

                            var campusinfo = ID_data_array[i][1]
                            var collegeinfo = ID_data_array[i][2]
                            var departmentinfo = ID_data_array[i][3]
                            var gradeinfo = ID_data_array[i][4]

                            var name = []
                            var time = []
                            var prof = []
                            var credit = []

                            Subinfo
                                .find(
                                    {campus: `${campusinfo}`, college: `${collegeinfo}`, department: `${departmentinfo}`, grade: `${gradeinfo}`}
                                )
                                .then((sub) => {
                                    if (sub) {
                                        for (var i in sub) {
                                            if (sub[i]['subject'].length == 0) {
                                                continue
                                            }

                                            if (sub[i]['choice'] == '필수') {
                                                name.push(sub[i]['name'])
                                                credit.push(sub[i]['credit'])

                                                var random_num = (Math.floor(Math.random() * (sub[i]['subject'].length)))

                                                if (time.length > 0) {
                                                    while (true) {
                                                        try {
                                                            var tmp = 0
                                                            var random_num = (Math.floor(Math.random() * (sub[i]['subject'].length)))

                                                            for (var j in time) {
                                                                if (time[j].slice(0, 1) == sub[i]['subject'][random_num]['time'].slice(0, 1)) {
                                                                    var tmp_time1 = Number(`${time[j].slice(2, 4) + '.' + time[j].slice(5, 7)}`)
                                                                    var tmp_time2 = Number(`${time[j].slice(8, 10) + '.' + time[j].slice(11, 13)}`)
                                                                    var tmp_time3 = Number(
                                                                        `${sub[i]['subject'][random_num]['time'].slice(2, 4) + '.' + sub[i]['subject'][random_num]['time'].slice(
                                                                            5,
                                                                            7
                                                                        )}`
                                                                    )

                                                                    if (tmp_time3 >= tmp_time1 & tmp_time3 <= tmp_time2) {
                                                                        tmp = 1
                                                                        break
                                                                    }
                                                                }
                                                            }
                                                            if (tmp == 0) {
                                                                break
                                                            }
                                                        } catch (err) {
                                                            console.error(err);
                                                        }
                                                    }
                                                }
                                                time.push(sub[i]['subject'][random_num]['time'])
                                                prof.push(sub[i]['subject'][random_num]['prof'])
                                            }
                                        }
                                    } else {
                                        console.log(err)
                                    }
                                    var message_array = []

                                    var result_split = []
                                    for (var i in name) {
                                        result_split[i] = '\n';
                                        var splitname = time[i].split('<br>')
                                        for (var j in splitname) {
                                            if (j != splitname.length - 1) {
                                                result_split[i] += (splitname[j] + '\n');
                                            } else {
                                                result_split[i] += splitname[j];
                                            }
                                        }
                                        var message_json = {
                                            'type': 'text',
                                            'text': `${ '과목명: ' + name[i] + '\n강의 시간:' + result_split[i] + '\n교수님: ' + prof[i] + '' +
                                                    '\n학점: ' + credit[i]}`
                                        }
                                        message_array.push(message_json)
                                    }
                                    if (message_array.length == 0) {
                                        message_array = [
                                            {
                                                'type': 'text',
                                                'text': '입력과정에서 오류가 있습니다. \'시작\'을 입력해주세요.'
                                            }
                                        ]
                                    } else {
                                        message_array[message_array.length - 1] = {
                                            'type': 'text',
                                            'text': `${ '과목명: ' + name[name.length - 1] + '\n강의 시간: ' + result_split[result_split.length - 1] +
                                                    '\n교수님: ' + prof[prof.length - 1] + '\n학점: ' + credit[credit.length - 1] + '\n' +
                                                    '\n만약 다른 추천을 원하면 \'추천\'을 입력해주세요.\n처음 입력으로 돌아가고 싶으시면 \'시작\'을 입력해주세요'}`
                                        }
                                    }

                                    request.post({
                                        url: TARGET_URL,
                                        headers: {
                                            'Authorization': `Bearer ${TOKEN}`
                                        },

                                        json: {
                                            "replyToken": eventObj.replyToken,
                                            "messages": message_array
                                        }
                                    }, (error, response, body) => {
                                        console.log(body)
                                    });
                                })
                        }
                        break
                    }
                }
                res.sendStatus(200);

            }
        }

    }

});

try {
    const option = {
        ca: fs.readFileSync(
            '/etc/letsencrypt/live/' + domain + '/fullchain.pem'
        ),
        key: fs
            .readFileSync(
                path.resolve(process.cwd(), '/etc/letsencrypt/live/' + domain + '/privkey.pem'),
                'utf8'
            )
            .toString(),
        cert: fs
            .readFileSync(
                path.resolve(process.cwd(), '/etc/letsencrypt/live/' + domain + '/cert.pem'),
                'utf8'
            )
            .toString()
    };

    HTTPS
        .createServer(option, app)
        .listen(sslport, () => {
            console.log(`[HTTPS] Server is started on port ${sslport}`);
        });
} catch (error) {
    console.log('[HTTPS] HTTPS 오류가 발생하였습니다. HTTPS 서버는 실행되지 않습니다.');
    console.log(error);
}