const express = require('express');
const {
    response,
    request
} = require('express');
const app = express();



const {
    json
} = require("body-parser");
const {
    pathToFileURL
} = require("url");

app.set('view engine', 'ejs');
app.use(express.urlencoded({
    extended: false
}));
app.use(express.static('public'));

const fs = require('fs');

let today = new Date()
today.setHours(today.getHours() + 5);

setInterval(function() {
    let timeu = new Date();
    timeu.setHours(timeu.getHours() + 5);
    const last = today;
    let sec = today.getDate();
    let secu = timeu.getDate();
    // console.log(sec, secu);
    if (sec != secu) {
        let pill = `[0]`;
        let comment = "";
        fs.readFile('./pills.json', 'utf8', (err, data) => {
            let jdata = JSON.parse(data);
            let num = j_max(jdata) + 1;
            let name = `pill_${num}`;
            let c_date = get_date(last);
            jwrite_pill(name, pill, c_date, comment);
        })
        console.log(pill);
        today = timeu;
        console.log(today, timeu, last);
    }
}, 1000);

function get_date(time) {

    // today.setHours(today.getHours() + 5);

    let day = time.getDate();
    let month = time.getMonth() + 1;
    let year = time.getFullYear();

    // console.log(day.toString().length);
    // console.log(month.toString().length);
    day = (day.toString().length <= 1) ? `0${day}` : day;
    month = (month.toString().length <= 1) ? `0${month}` : month;

    return `${day}.${month}.${year}`;
}


app.get('/user', (req, res) => {
    fs.readFile('./pills.json', 'utf8', (err, data) => {
        let jdata = JSON.parse(data);
        res.render(`user`, {
            data: dict_reverse(jdata)
        });
    })
})
app.get('/', (req, res) => {
    res.redirect("/user");
})

console.log(get_date(today));

function dict_reverse(obj) {
    new_obj = {}
    rev_obj = Object.keys(obj).reverse();
    rev_obj.forEach(function(i) {
        new_obj[i] = obj[i];
    })
    return new_obj;
}

app.post('/scripts', (req, res) => {
    let inp = req.body;
    console.log(inp);
    if (inp["func"] == "save") {
        let pill = `[${inp["pill"]}]`;
        let comment = inp["comment"];
        fs.readFile('./pills.json', 'utf8', (err, data) => {
            let jdata = JSON.parse(data);
            let num = j_max(jdata) + 1;
            let name = `pill_${num}`;
            let c_date = get_date(today);
            jwrite_pill(name, pill, c_date, comment);
        })
        console.log(pill);
    } else if (inp["func"] == "del") {
        let pill = inp["pill"];
        fs.readFile('./pills.json', 'utf8', (err, data) => {
            let jdata = JSON.parse(data);
            delete jdata[pill];
            jwrite(jdata);
        })
    } else if (inp["func"] == "edit" && inp["mode"] == "save") {
        let name = inp["name"];

        let date = inp["date"];
        let dates = date.toString().split("-");
        date = `${dates[2]}.${dates[1]}.${dates[0]}`;

        let comment = inp["comment"];

        let pill = `[${inp["pill"]}]`;
        console.log("edit");
        jwrite_pill(name, pill, date, comment);
    }
    res.redirect("/user");
})

function jwrite(jdata) {
    // console.log(jdata);            
    let wdata = JSON.stringify(jdata);
    fs.writeFile('./pills.json', wdata, 'utf8', err => {
        if (err) {
            console.log(`Error writing file: ${err}`)
        } else {
            console.log(`File is written successfully!`)
        }
    })
}



function jwrite_pill(name, pill, date, comment) {
    comment = (comment == "" || comment == null || comment == " " || comment == undefined || comment == "  ") ? "-" : comment;
    // console.log(comment,"||");
    fs.readFile('./pills.json', 'utf8', (err, data) => {
        let jdata = JSON.parse(data);
        jdata[name] = {
            "date": date,
            "pill": pill,
            "comment": comment
        };
        // console.log(jdata);            
        let wdata = JSON.stringify(jdata);
        fs.writeFile('./pills.json', wdata, 'utf8', err => {
            if (err) {
                console.log(`Error writing file: ${err}`)
            } else {
                console.log(`File is written successfully!`)
            }
        })
    })
}

app.post("/edit", (req, res) => {
    let inp = req.body;
    let name = inp["name"];
    let pill = inp["pill"].replace('[', '').replace(']', "");
    let date = inp["date"];

    let comment = inp["comment"];
    comment = (comment == "-") ? "" : comment;

    console.log("edit");
    res.render(`edit`, {
        name: name,
        pill: pill,
        comment: comment,
        date: date
    });
})

function j_max(arg) {
    let max = 0;
    for (const key in arg) {
        let num = parseInt(key.split("_")[parseInt(key.split("_").length - 1)]);
        // console.log(key);
        max = (num > max) ? num : max;
    }
    console.log(max);
    return max;
}


app.all('*', (req, res) => {
    res.status(404).send('<h1>404! Page not</h1>');
});
app.listen(process.env.PORT || 8080, () => console.log("started"));