import Mastodon from 'mastodon-api';
import readline from 'readline';
import {storeData, loadData} from './JSONdataStore.js';

const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout
})

export class MastodonTokenHandler {
    constructor(config) {
        this.config = config??loadData("./config.json");
        this.clientId;
        this.clientSecret;
        this.accessToken = this.config.token;
        this.baseUrl = this.config.baseUrl;
    }
    getAccessToken(_callback){
        if (!this.accessToken) this.newAccessToken(_callback);
        else _callback(this.accessToken);
        return this.accessToken;
    }
    newAccessToken(_callback){
        Mastodon.createOAuthApp(`${this.baseUrl}/api/v1/apps`)
            .catch((err) => console.error(err))
            .then((res) => {
                console.log('Please save \'id\', \'client_id\' and \'client_secret\' in your program and use it from now on!')
                console.log(res)

                this.clientId = res.client_id
                this.clientSecret = res.client_secret

                return Mastodon.getAuthorizationUrl(this.clientId, this.clientSecret, this.baseUrl)
            })
            .then((url) => {
                console.log('This is the authorization URL. Open it in your browser and authorize with your account!')
                console.log(url)
                return new Promise((resolve) => {
                    rl.question('Please enter the code from the website: ', (code) => {
                        resolve(code)
                        rl.close()
                    })
                })
            })
            .then((code) => Mastodon.getAccessToken(this.clientId, this.clientSecret, code, this.baseUrl))
            .catch((err) => console.error(err))
            .then((token) => {
                this.accessToken = token;
                console.log(`This is the access token. Save it!\n${this.accessToken}`)
                this.config.token = this.accessToken;
                storeData(this.config, "./config.json");
                _callback(this.accessToken);
            })
    }
}