const fetch = require('node-fetch');
const express = require('express');
const bodyParser = require('body-parser');
const moment = require('moment');

const app = express();

app.use(bodyParser.urlencoded({
    extended: false
}));

const options = {
    method: 'GET',
    headers: {
        'Accept': 'application/json',
        'Accept-Charset': 'utf-8',
        'Accept-Encoding': 'gzip'
    },
    compress: true
};

const getLatestChangeId = () =>
    fetch('http://api.poe.ninja/api/Data/GetStats', options)
        .then(result => result.json)
        .catch(() => throw new Error('Could not get latest change id from poe.ninja '));

const getStashData = changeId => fetch(`http://www.pathofexile.com/api/public-stash-tabs?id=${changeId}`, options)
        .then(result => result.json())
        .catch(() => throw new Error('Could not fetch POE Stash tab data from the API'));

const loadItemPrices = currentTime =>
    fetch(
        `http://cdn.poe.ninja/api/Data/GetUniqueWeaponOverview?league=Legacy&date=${currentTime}`,
        options
    )
    .then(result => result.json())
    .catch(() => throw new Error('Could not fetch armor price data from poe.ninja'));

let currencyRates = [];
let itemPrices = [];

loadItemPrices(new moment().format("YYYY-MM-DD"))
    .then(response => {
        const lines = response['lines'];

        itemPrices = lines
            .map(line => {
                name: lines[i].name,
                price: lines[i].chaosValue
            });

        console.log('Loaded unique armors into the price list');
    })
    .catch(() => throw new Error('Could not load item prices'));

app.get('/uniques', function (req, res) {
    var changeId = undefined;

    getLatestChangeId()
        .then(function (response) {
            changeId = response['nextChangeId'];
            console.log(`success, latest change id is : ${changeId}`);

            getStashData(changeId)
                .then(response => console.log(response['next_change_id']))
                .catch(error => console.error('failed to grab stash data', error));
        })
        .catch(error => console.error(`failed to parse latest change id ${error}`));

    res.status(200).send('got request for unique items');
    res.end('Response will be available on console, nothing to look here!');
});

const port = 8000;
app.listen(port);
console.log(`Listening at http://localhost:${port}`);